Navajo Unit April Operations Meeting Minutes and Slides — Reclamation #SanJuanRiver #ColoradoRiver #COriver #aridification

Aerial view of Navajo Dam and Reservoir. Photo credit: USBR

From email from the Western Colorado Area Office:

April 26, 2024

Please see the links below for the Meeting Summary and Slides from the April Operations Meeting of the Navajo Unit. 

Meeting Summary: https://www.usbr.gov/uc/wcao/water/rsvrs/mtgs/pdfs/archives/nm2024_04.pdf

Meeting Slides: https://www.usbr.gov/uc/wcao/water/rsvrs/mtgs/pdfs/archives/nmho2024_01.pdf

Mesa County contributes $1 million to the Shoshone Water Rights

Shoshone Falls hydroelectric generation station via USGenWeb

Click the link to read the release on the Mesa County website:

April 23, 2024

On April 23, during the administrative public hearing of the Board of Mesa County Commissioners, they approved a million-dollar contribution toward the permanent protection of the most senior, non-consumptive water right on the Colorado River — the Shoshone water rights.

“Mesa County’s $1 million investment in the Shoshone water rights is not just a financial commitment, but a pledge to our community’s future,” said Bobbie Daniel, Chair of the Board of Mesa County Commissioners. “By safeguarding these rights, Mesa County ensures that the West Slope’s lifeblood — our beloved Colorado River — continues to sustain our families, farms, and natural habitats. We stand united with our fellow counties and stakeholders in protecting and preserving our most precious resource for future generations.”

For more information about the Shoshone Water Right Preservation Campaign & Coalition, visit KeepShoshoneFlowing.org.

Watch the video below to learn why the signing of the Shoshone Water Rights Agreement is vital to Mesa County.

A Future for Birds and People in the #ColoradoRiver Basin: Audubon and partner NGOs propose an alternative for post-2026 operations — Audubon #COriver #aridification

Adult Yellow-billed Cuckoo. Photo: Andy Reago and Chrissy McClarren/Flickr (CC-BY-2.0)

Click the link to read the release on the Audubon website (Jennifer Pitt):

March 29, 2024

Audubon has joined partner conservation organizations to propose “Cooperative Conservation” as an alternative for the federal Bureau of Reclamation (Reclamation) to study as they consider how to manage the Colorado River after 2026, when current management rules expire. Reclamation has initiated a process expected to assess multiple alternatives before they establish new operational rules.

In recent weeks the Upper Basin (Colorado, New Mexico, Utah and Wyoming) and Lower Basin (Arizona, California and Nevada) have each submitted proposals of their own. They appear to be in broad agreement that Colorado River water uses need to be reduced, not only because the Colorado River’s water is over-allocated, but also because climate change is shrinking the river. But alignment between the Upper Basin and Lower Basin ends there, with significant dispute over whose water uses should be reduced.

Cooperative Conservation has a different focus. It prioritizes stabilizing the Colorado River water supply, provides opportunities to make management more equitable, and creates mechanisms to improve environmental outcomes [ed. emphasis mine]:

  • Water supply reliability would be improved by consideration of recent trends as well as assessing the health of the entire system, departing from the current operations that have not kept up with changing conditions such that in 2022 federal managers were worried about the continued ability release water through the dams.
  • Ecosystem health would be addressed with stewardship and mitigation provisions. Today’s operations are based on a policy framework that has not prioritized Colorado River habitats, leaving many used by birds such as Yuma Ridgeway’s Rails and Yellow-billed cuckoos degraded and vulnerable.
  • Colorado River Delta habitats and flows have been restored in recent United – States Mexico agreements, and the opportunity for future binational agreements to extend and expand commitments to these resources would be preserved. Most of Colorado’s Delta was desiccated as the river was developed through the 20th century, and these agreements have developed a path towards restoring some of what was lost.
  • Conservation Reserve program to incentivize water conservation, that improves on the current system of “Intentionally Created Surplus” by adding to the stability of water supplies, offering an opportunity for state and federal governments to forge an agreement with Colorado River Basin Tribes looking to realize greater benefits from their water rights, and create ecological benefits through flexible management that puts water where it is needed in the Colorado River.

These innovations could help the diversity of birds and wildlife and more than 35 million people who depend on the Colorado River. But Reclamation will not be able to move forward with them if the states cannot answer important questions about who should reduce water uses to bring demands into balance with supplies. Without consensus, Colorado River management could be headed to the courts, and opportunities for improved management will be lost. We remain optimistic that over the coming months the states will negotiate a solution, and urge them to recognize that reaching agreement on how to share water shortages is essential.

In the meantime, Audubon will be promoting Cooperative Conservation and all that it offers. Reclamation is expected to publish their analysis of Colorado River management alternatives by the end of 2024.

DOWNLOADABLE RESOURCES

Cooperative Conservation Alternative 20240329.pdf

Map credit: AGU

New Agreement to Improve River Flows in Grand County — @Northern_Water

Willow Creek, at the headwaters of the Colorado River, on April 2, 2021. Photo/Allen Best

Here’s the release from the Northern Colorado Water Conservancy District (Christine Travis and Jeff Stahla):

April 23, 2024

Grand County and Northern Colorado Water Conservancy District (Northern Water) have agreed to a unique and first-of-its-kind Operational Framework that provides Grand County with the ability to have as much as 7,000 acre-feet of additional controllable water to release from the Colorado-Big Thompson (C-BT) Project for stream enhancement and other purposes that will benefit Grand County’s recreation and agriculture industries. The volume available for streamflow improvement will be dependent on annual river conditions and C-BT Project storage levels.

Approved Tuesday [April 23, 2024] by the Grand County Commissioners, the agreement outlines a methodology to determine the water that will be available to the County each year. Water made available under this agreement to the County will be released to Willow Creek, or to the Colorado River, will supplement existing flows, and could accumulate to nearly 40,000 acre-feet over the course of a decade. Prior to 2005, this water was used for irrigation of hay fields near the Town of Granby. Since that time, the underlying lands have been removed from agricultural production and converted to residential and commercial development. Without this agreement, the water will continue to be captured by the C-BT Project and available to Northern Water for uses in Northeastern Colorado.

“The Operational Framework Agreement will provide the County with an additional water management tool to improve and enhance flows on the Colorado River,” said Grand County Commissioner Chair Merrit Linke. “The Colorado River is the life blood to sustaining our agriculture and recreation industries that are critically important to our local economy as well as all of the West Slope.”

Grand County and Northern Water will, in coming months, consult and coordinate with the U.S. Bureau of Reclamation regarding the implementation of the agreement.

‘Peak #snowpack’ can pack a surprise punch: Mountain snowpack typically peaks in April, but there have been some harrowing, far-from-typical years — News on Tap #ColoradoRiver #SouthPlatteRiver #COriver #aridification

Click the link to read the article on the Denver Water website (Todd Hartman):

April 22, 2024

April is a big month for water watchers. That’s when Colorado’s snowpack typically reaches its highest level before the big melt-out that follows. 

The watchers call this moment “peak snowpack.” And it can be a useful measure to predict water supplies for the warm months to come.

The snow-covered Continental Divide, seen from Loveland Pass. Melted snow, captured and stored in mountain reservoirs, is the source of nearly all the water Denver Water provides to customers every day. Photo credit: Denver Water.

Peak moments that fall earlier on the calendar can mean a spring runoff that ends too soon and reservoirs that don’t fill. Conversely, late peaks can mean reservoirs spill and high-water flows that can overtop riverbanks. 

Indeed, a closer look at “peak” numbers over the last several decades reveals some big surprises when the timing of the maximum snowpack falls outside the late April norm. Such off-rhythm peaks can lead to watering limits or, in the other extreme, raging runoff that can do damage to land and property.

For Denver Water, this year’s peak snowpack numbers look good. 

A mid-to-late April high point appears likely, and a healthy amount of water in the snow supports the utility’s forecast for full reservoirs for the upcoming irrigation season.

In short, it’s what Denver’s water watchers might call “a typical year.”


Join people with a passion for water, at denverwater.org/Careers.


In fact, though, the timing of the peak snowpack and how much frozen water the snow holds at that point is a highly variable condition and can leave water supply managers scrambling. This variability can be easy to forget when most years follow the script, or don’t veer far from it.

“As a water manager, if I only had one piece of data to determine how water supply was looking for a given year, it would be peak snowpack,” said Nathan Elder, who manages the tricky business of water supply for Denver Water. 

“Snowpack peaks can be highly variable in quantity and timing, and those factors indicate what the runoff and water supply situation will look like.” 

Take a look at the following graphs, which show the wide variability in the amount of water frozen in the snow at the point of “peak snowpack” over the past 45 years. The range in both the Colorado and South Platte river basins where Denver Water collects water can stretch from 10 inches to more than 25 inches of water in the snow.

The amount of water frozen in the snow at the moment of “peak snowpack” over the last 45 years in the Colorado River Basin, where Denver Water collects water. Image credit: Denver Water.
The amount of water frozen in the snow at the moment of “peak snowpack” over the past 45 years for the South Platte River Basin, where Denver Water collects water. Image credit: Denver Water.

Denver Water gets its water from parts of two major river basins — the South Platte and the Colorado. Both tend to hit peak snowpack in late April (the 23rd and the 25th respectively) and hit an average of about 12 and 17 inches of “snow-water equivalent,” or SWE, a fancy way of saying amount of water in the snowpack.

But some years Mother Nature has ignored those averages by frightening margins.

One of the scariest was 2012, when peak snowpack for Denver Water collection areas in both basins came not in mid-to-late April, but early March — March 5 in the South Platte and March 6 in the Colorado. 

That was about seven weeks ahead of average and it forced Denver Water to implement outdoor restrictions as reservoirs failed to replenish.

Then there was the infamous spring of 2002, when snow-water totals for Denver Water collection areas at peak were a mere 50% of average in the South Platte Basin and 56% in the Colorado — another example, like 2012, of terrible numbers striking both of Denver Water’s collection basins in the same year. 


Learn more about how Denver Water monitors the snowpack


The spring 2002 peak snowpack contained some of the lowest amount of water in the snow over the last 45 years of records. 

My kids and their friends built a small terrain park in front of their house near Sloans Lake after the March 2003 St. Patrick’s Day blizzard.

That early 2000s drought hung on until the following spring in 2003, when it was busted — fantastically and famously — with a late March blizzard that dropped 7 feet of wet snow in the foothills, 3 feet of snow in the city and put an end to 19 months of below-average precipitation in Denver. 

“Liquid Gold,” blared the banner headline of the now-closed Rocky Mountain News. Anyone living in Denver more than 20 years remembers the storm. 

Peak snowpack has also offered surprises on the opposite end of the spectrum, bringing late peaks and a wealth of water.

In 2015, the peak snowpack date in both basins came a month later than normal, on May 23. That meant a more compressed runoff season and flooding challenges, particularly along the South Platte.

Watch this video about the epic spring runoff of 2015: 

In 1997, the South Platte’s peak snowpack hit a stunning 203% of average. In all, that was 24 inches of water in the snow, twice the average level in a basin that fills four major reservoirs for Denver Water.

Another mark experts like to track is date of melt-out — the date when the last of the snow melts at various measuring spots in the high country. In both basins that typically happens in early June. But, like peak snowpack, melt-out dates can surprise too.

Way back in 1981, a terribly dry year, the South Platte basin saw melt-out April 27 — about the time when Denver Water would typically see peak snowpack! Scary stuff.

Alas, in 1995, the South Platte went to different extremes, with the final melt recorded July 4, an entire month later than average.

During the 1983 Colorado River flood, described by some as an example of a “black swan” event, sheets of plywood (visible just above the steel barrier) were installed to prevent Glen Canyon Dam from overflowing. Source: Bureau of Reclamation

In the Colorado River Basin, the latest such melt-out stretched to July 12, in 1983. That year is famous for the swollen river flows all the way to Lake Powell, where Glen Canyon Dam nearly overtopped.

That runoff season was memorialized in the “The Emerald Mile,” a remarkable book that chronicled attempts to take advantage of record river flows to set speed records boating through the Grand Canyon. 

All of it is a reminder that average years are just another way nature leaves room for surprises. 

So, let’s be satisfied this spring with an “average” peak and a solid water supply for 2024.

2024 #COleg: Bill would protect #YampaRiver Valley #coal plants’ water from abandonment: Water would stay in river after plants close in 2028 — @AspenJournalism #GreenRiver #ColoradoRiver #COriver #aridification

The coal-fired Tri-State Generation and Transmission plant in Craig is scheduled to close in 2028. Senate bill SB24-197 would allow the water rights associated with the plant to be protected from abandonment until 2050. Photo credit: Brent Gardner-Smith/Aspen Journalism

Click the link to read the article on the Aspen Journalism website (Heather Sackett):

April 17, 2024

State lawmakers are considering a bill that would let two energy companies with coal-fired power plants in northwest Colorado hang on to their water rights even after the plants’ planned closures in 2028.

Senate Bill SB24-197 says that industrial water rights held by Xcel Energy and Tri-State Generation and Transmission Association Inc. will be protected from abandonment through 2050. Under Colorado law, a water right that is not being used could end up on an abandonment list, which is compiled every 10 years.

Abandonment is the official term for one of Colorado’s best-known water adages: Use it or lose it. It means that the right to use the water is essentially canceled and ceases to exist. The water goes back into the stream where another water user can claim it.

Supporters of the bill say this protection from abandonment would give the companies a grace period to transition to clean-energy sources and eventually use the water again in new methods of energy production. In the meantime, the water will remain in the stream for the benefit of the environment, recreation and downstream irrigators.

State Sen. Dylan Roberts, D-Frisco, is one of the bill’s sponsors, and represents Clear Creek, Eagle, Garfield, Gilpin, Grand, Jackson, Moffat, Rio Blanco, Routt and Summit counties.

“The idea is if we can find a way to ensure that the water rights of the power companies are protected over the next couple of decades, this will give them a stronger incentive to find a new way to produce energy in the region,” Roberts said.

Tri-State plans to shut down its coal-fired power plant in Craig in 2028, the same year that Xcel Energy plans to close the Hayden Generating Station, which has prompted questions about what will happen to the water currently being used by the facilities.

Jackie Brown is a senior water and natural resource advisor at Tri-State. She said the bill preserves future opportunities for economic development by energy utilities in Moffat and Routt counties.

“The measures in this bill provide Tri-State with certainty that our water resources remain intact and available for future dispatchable, carbon-free generation as needed and projected in our Electric Resource Plan,” Brown said in a statement. “While we continue our planning process, keeping the utility water in the Yampa River helps all water users, creating a win-win situation.”

According to Brown, the water used from the Yampa River by both energy companies is estimated to be about 44 cubic feet per second of flow. But, if the bill passes, engineers will officially quantify by 2030 the amount of water that the industries have historically used, and that is the amount that will be protected from abandonment. Any portion of the water rights that the energy companies lease to a third party would not be protected from abandonment.

The Yampa River begins in the Flat Tops Wilderness, flows through the city of Steamboat Springs and west through Routt and Moffat counties to Dinosaur National Monument, and eventually joins with the Green River. The Yampa River basin was one of the last to be developed in the state and in recent years has begun experiencing some of the issues long present in other areas such as shortages, calls, an overappropriation designation and stricter enforcement of state measurement rules.

In 2018, irrigators placed the first call on the river, triggering cutbacks from junior water users. When an irrigator is not receiving the entire amount of water to which they are legally entitled, they can place a call, which requires water-rights holders with younger water rights to stop irrigating so the senior water user can get their share. The Colorado River Water Conservation District, the Colorado Water Trust and others have made releases out of Elkhead Reservoir to get extra water to these senior downstream irrigators and keep the call off the river.

The Lefevre family prepares to put their rafts in at Pebble Beach for a float down the Yampa River to Loudy Simpson Park in Craig in June 2021. When the coal-fired power plants shut down in 2028, the water they currently use will be left in the water to the benefit of the environment, recreation and downstream irrigators. From left, Marcie Lefevre, Nathan Lefevre, Travis Lefevre and Sue Eschen.
CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Support from environmental groups

SB 197 has gained support from environmental groups, including Conservation Colorado, The Nature Conservancy and Western Resource Advocates. Josh Kuhn, senior water campaign manager with Conservation Colorado, said leaving the water in the river will have environmental benefits such as lowering the often-too-high temperature of the Yampa, boost flows for recreation and the environment, and prevent calls on the river.

But the benefit to the river and water users from SB 197 may only be temporary. The energy companies will still own the water rights and may begin using them again whenever they want.

“It has been made clear that there’s no assurances that the water will be there on a permanent basis because Tri-State wants the ability to use that water to generate additional renewable clean-energy supplies in the future,” Kuhn said. “So there is a shared understanding that this is being done on a temporary basis.”

With the impending closure of the coal mines and power plants that by one estimate will result in 800 lost jobs, some see the Yampa River as an underutilized amenity that could supply recreation jobs and enhance quality of life. Supporters of the bill say keeping the energy companies’ water in the river and protected from abandonment will ensure that the water is not diverted out of the basin.

“The Yampa is already a river that suffers the impacts of climate-driven drought,” Kuhn said. “And so, in order to help protect that river and the economy that’s dependent upon it, they were looking for solutions to make sure that none of that water was exported to another basin.”

The protection of the energy companies’ water rights is just one facet of SB 197, which would also implement recommendations from last year’s Colorado River Drought Task Force. These include expanding the state’s instream-flow temporary loan program to let owners of water stored in reservoirs to loan it for the benefit of the environment in stream reaches where the state does not hold an instream-flow water right; expanding the state’s agricultural water rights protection program; and waiving the matching funds requirement for water project grants to the Southern Ute and Ute Mountain Ute tribal nations.

Roberts was the sponsor of 2023’s SB 295, which created the drought task force. Although the 17-member task force did not advance protections for industrial water rights from abandonment as an official recommendation (it failed on a 9-7 vote), it was included in the narrative section of the report that it provided to lawmakers.

“I’ve been working on this for months with the energy companies, with the state, with environmental groups and with local stakeholders in Routt and Moffat counties,” Roberts said. “And we narrowed the proposal significantly, and now almost everybody who was opposed on the task force is supportive of this idea moving forward.”

SB 197 passed unanimously in the Senate on Wednesday [April 17, 2024] and will now be up for approval by the House.

Yampa River Basin via Wikimedia.

New #ColoradoRiver proposals put environmental needs front and center in deciding river’s future — Fresh Water News #COriver #aridification

Colorado River. Photo credit: Abby Burk via Audubon Rockies

Click the link to read the article on the Water Education Colorado website (Shannon Mullane):

April 17, 2024

Environmental groups and water experts say the U.S. Bureau of Reclamation should give nature a say in how it manages the Colorado River for years to come.

In March, seven states, including Colorado, released two competing proposals for how to manage two enormous reservoirs in the Colorado River Basin and make painful decisions about cutting back on water use once current operating rules expire in 2026.

But they’re not the only ones throwing out ideas: Water experts and environmental advocates have submitted two proposals of their own. They want to make sure endangered fish, Grand Canyon ecosystems, and more aren’t left out of the conversation.  

The experts hope their proposals, which highlight changing climate data and environmentally focused reservoir releases, help inform the Bureau of Reclamation’s final report for how the river should be managed after 2026. A draft of that report is expected in December.

“If you don’t care about the environment, then the whole system crashes,” said John Berggren, a regional policy manager with Western Resource Advocates. “That’s not to say the environment takes priority over water supply and other issues, but rather they can be integrated.”

The current operating rules, established in 2007, focus on how water is stored in Lake Powell on the Utah-Arizona border, released to Lake Mead on the Nevada-Arizona border, and then released to millions of water users in the Lower Basin states of Arizona, California and Nevada.

Together, lakes Powell and Mead make up about 92% of storage capacity, about 58.48 million acre-feet, in the Colorado River Basin. Both are about one-third full.

One acre-foot roughly equals the annual water use of two to three households.

High-stakes negotiations stalled early this year with states at loggerheads over how to share water cuts. The four Upper Basin states — Colorado, New Mexico, Utah and Wyoming — only included cuts to the Lower Basin’s water use, although the states promised to pursue voluntary conservation programs. The three Lower Basin states called on all seven states to make cuts when the amount of available water falls below 38% of the total capacity in seven federal reservoirs.

Several tribal nations submitted their own proposal to advocate for tribal water rights in the federal process.

These proposals have the potential to impact water users across the basin, which provides water to 40 million people, more than 5 million acres of farmland, two states in Mexico, and cities including Los Angeles, Las Vegas, Phoenix and Denver.

One perspective all of the proposals have in common: The status quo operations aren’t going to work in the future.

“We need to use less water, and there’s going to be shortages for the Colorado River going forward,” Berggren said. “We wanted ours to focus more on how to integrate environmental considerations regardless of who’s taking shortages.”

Giving nature a seat at the table

Neither proposal from the basin states places a heavy emphasis on incorporating environmental concerns into how lakes Powell and Mead are managed, and there are plenty of environmental hotspots in the basin.

The Grand Canyon sits below Lake Powell, and its ecosystems and landscape can be helped or hurt by the reservoir’s releases. In 2011, water officials released an 11 million-acre-foot surge of water into the canyon — the right amount of water according to the current rules — that was too big and ended up eroding sandbars where people camp and view the national park. That sand is hard to replace since most of the Colorado River’s sediment is trapped in Lake Powell.

The Upper Colorado River Endangered Fish Recovery Program is trying to boost endangered fish populations in the face of growing numbers of predatory, invasive fish. The Salton Sea in California is shrinking, exposing dry shorelines with toxic dust particles to the wind. The once-vibrant ecosystem in the Colorado River Delta, where the river meets the Gulf of California, is now diminished.

With these areas in mind, one environmental proposal advocates for linking environmental priorities to how the reservoirs operate. It also suggests using updated climate data, in addition to reservoir storage, to determine releases from lakes Mead and Powell.

This proposal was put forward by Western Resource Advocates, Audubon, American Rivers, Environmental Defense Fund, The Nature Conservancy, Trout Unlimited and the Theodore Roosevelt Conservation Partnership.

Since 2007 under the current guidelines, when the water in lakes Mead and Powell dropped to pre-decided water levels, officials knew to release a predetermined amount of water.

Another environmental proposal suggests a more flexible approach: On an annual basis, the secretary of the Interior would decide how much water to release from Lake Powell based on the environmental, recreational, water supply and hydropower goals for that year — rather than using a fixed rule for years to come.

This adaptive-management proposal was submitted by well-recognized Colorado River experts Jack Schmidt, former chief of the federal Grand Canyon Monitoring and Research Center; Eric Kuhn, former Colorado River District general manager and author of “Science be Dammed”; and Kuhn’s co-author John Fleck, a journalist-turned academic at the Utton Transboundary Resources Center at the University of New Mexico School of Law.

“What I have learned in a 40-year career in the Grand Canyon is that scientific understanding evolves, changes and improves,” said Schmidt, currently the director of the Center for Colorado River Studies at Utah State University. “Going forward, we’re making a mistake to define hard and fast rules for what the releases from Lake Powell to Lake Mead would be.”

Big ideas and key questions

Environment and water experts say they are mainly trying to elevate their concerns and the role of nature in the federal process. When it comes to the nitty-gritty, however, each of the proposals raises some key questions for other Colorado water experts.

The joint environmental proposal, which Berggren helped with, identifies several environmental hotspots, like the Grand Canyon, Salton Sea and endangered fish programs, and proposes incorporating them into how lakes Mead and Powell are managed in the future.

For example, the post-2026 operating rules could include minimum flows from Powell into the Grand Canyon of 4.34 million acre-feet per year to ensure that ecosystems, from the lower canyon’s Sonoran Desert to the North Rim’s coniferous forest, stay healthy.

“You incorporate environmental considerations, and suddenly you have a more healthy, flowing Colorado River, which allows the basin states to have a more reliable water supply,” Berggren said.

But incorporating so many different environmental concerns in one document was a big “red flag” for Jennifer Gimbel, a senior water policy scholar at the Colorado Water Center and former deputy commissioner for the Bureau of Reclamation.

How officials manage each of these environments is tied to years of work by programs, rulemaking documents, legislation and more. Reservoir releases that aim to help the environment are often wrapped into established rules that govern how each reservoir operates.

“That is one scary document if we’re looking at how to manage everything on the river,” Gimbel said. “I’m not sure how practical they are with trying to move that forward.”

The environmental groups’ joint proposal also suggested that officials look at both total reservoir storage and updated climate data to guide operations at lakes Mead and Powell.

The climate data would come from a federal three-year climate model that factors in temperature, precipitation, snow and more to guide operations at lakes Mead and Powell. The total reservoir storage would be based on the amount of water stored in seven reservoirs, including federal reservoirs in the Upper Basin such as Flaming Gorge, Blue Mesa and Navajo reservoirs. That’s similar to the Lower Basin states’ proposal.

Considering both factors together would help avoid unreliable forecasting and adjust to changing conditions, according to the proposal. Upper Basin reservoirs would help with calculations but would not be used to move water from one reservoir to another, Berggren emphasized.

But including Upper Basin reservoirs in how lakes Mead and Powell operate is a flashpoint in the Colorado River negotiations.

Officials like Becky Mitchell, Colorado’s top Colorado River negotiator, have been fighting attempts to include these reservoirs in the operations for Lake Powell and Lake Mead. Flaming Gorge and Blue Mesa, Colorado’s largest reservoir, had to release water to boost Lake Powell’s historically low water levels in 2021, and then Flaming Gorge released more in 2022.

“These reservoirs are not intended to protect Lake Mead or provide for additional Lower Basin supply, but are for Upper Basin uses and environmental flows, among other purposes,” Mitchell said in a written statement, adding that her team was still analyzing the proposal. “They are also essential to the success of the recreational and tourist economies in the region.”

Considering both factors together would help avoid unreliable forecasting and adjust to changing conditions, according to the proposal. Upper Basin reservoirs would help with calculations but would not be used to move water from one reservoir to another, Berggren emphasized.

But including Upper Basin reservoirs in how lakes Mead and Powell operate is a flashpoint in the Colorado River negotiations.

Officials like Becky Mitchell, Colorado’s top Colorado River negotiator, have been fighting attempts to include these reservoirs in the operations for Lake Powell and Lake Mead. Flaming Gorge and Blue Mesa, Colorado’s largest reservoir, had to release water to boost Lake Powell’s historically low water levels in 2021, and then Flaming Gorge released more in 2022.

“These reservoirs are not intended to protect Lake Mead or provide for additional Lower Basin supply, but are for Upper Basin uses and environmental flows, among other purposes,” Mitchell said in a written statement, adding that her team was still analyzing the proposal. “They are also essential to the success of the recreational and tourist economies in the region.”

The three water experts’ proposal says the post-2026 rules should include instructions on how to reduce water use when available water is unusually low. But the rules should not include prescriptive annual releases from Lake Powell.

“Because the science on which those rules were developed is going to change in the next 20 years, and then you’re going to have to renegotiate the whole damn thing again,” Schmidt said.

Instead, the annual releases from Powell can fluctuate, as long as they comply with water law. For example, instead of releasing too much water from Powell because the rules say so — and harming the Grand Canyon’s landscape in the process — the Secretary of the Interior could have more flexibility to decide how much water to release.

Deciding releases annually, instead of setting up fixed rules, has caused other water officials to balk, according to Schmidt.

“I have already had behind-the-scenes, off-the-record conversations with some state people, and they basically said, ‘you’re out of your mind. We need certainty,’” he said.

But if water managers do not create rules that are flexible enough to adapt to changing conditions in the river basin, they will continue to run into problems, Schmidt said.

“How do you incorporate flexibility in a water supply negotiation that seeks certainty?” he said. “That is the fundamental problem.”

Map credit: AGU

What Happens if there is no Agreement on Post-2026 #ColoradoRiver Operations? — Eric Kuhn (InkStain.net) #COriver #aridification

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

Click the link to read the article on the InkStain.net website (Eric Kuhn):

April 15, 2023

Given how far apart the competing proposals from the Colorado River Upper and Lower Division States are, a legitimate question is – “what happens if we get to the summer of 2026 and there is still no agreement on the post-2026 operational guidelines?” Well, believe it or not, that is a question upon which the seven basin states and the Secretary of the Interior already agree.  The Upper Division States made the following comment in their proposal:

The language quoted by the Upper Division States letter comes from the Record of Decision (RoD) for 2007 Interim Guidelines (Section 8. C.). This termination language was included with the consent of the states. So, the obvious questions are – if the operating criteria are to revert to the LROC, what are the LROC, and what specifically do they mean for the operation of Lakes Mead and Powell?

WHAT IS THE LROC?

The long-range coordinated operating criteria or “LROC” are a requirement of the 1968 Colorado River Basin Project Act, the federal legislation that, among many other things, authorized the Central Arizona Project (CAP). Prior to the creation of the 2007 Interim Guidelines for the coordinated operation of Glen Canyon and Hoover dams, the LROC created the framework for determining how much water to release from Lake Powell to Lake Mead each year.

The 60s were a turbulent decade for the Colorado River Basin.  In 1962 Flaming Gorge and Navajo Reservoirs began filling, then in 1963, Lake Powell began filling. To manage the filling of over 30 million acre-feet of vacant space (25 maf in Lake Powell), in 1962 the Secretary issued filling criteria. And, as luck would have it, the 1960s were relatively dry. The filling criteria were controversial in both basins. A significant concern was power generation. The Upper Basin wanted to fill the reservoirs as fast as possible so the Upper Basin fund would begin accruing revenues that would be used to subsidize irrigation projects under the 1956 Colorado Storage Project Act. The Lower Basin was concerned with the impact of power generation at Hoover Dam – the revenues from which were being used to repay the federal treasury for Hoover Dam and other projects on the lower river.

The Upper Division States became concerned that the Lower Division States would continually interfere with the storage of water in the Upper Basin Reservoirs using Article III(e) of the Colorado River Compact, which states:

The Upper Division States (via the UCRC) decided they needed to use the federal legislation then pending before Congress to authorize the CAP to clarify the rules under which water would be stored and released from Lake Powell and the other CRSP storage reservoirs. A critical question that needed to be answered was how much holdover storage the Upper Division States would need to meet their compact obligations under Articles III(c) and III(d) of the compact. This was a difficult question to answer given that the two basins had very different interpretations of these provisions, especially the obligation off the Upper Division States to Mexico under the 1944 Treaty. Today the two basins still have very different interpretations of these provisions.

The specific language of Section 6 of the 1968 Act was negotiated by the states with input from Reclamation. With Congressman Aspinall (the House Interior and Insular Affairs Committee Chair from Western Colorado) insisting that operating language be included in any legislation, the UCRC had the better hand. Colorado’s Felix Sparks (its CWCB Director and UCRC Commissioner) said “we wrote every word of Section 6.”

The requirement for the LROC is included in Section 602(a):

Section 602(b) required that the Secretary submit draft criteria to the states by January 1, 1970, and, after receipt of comments, adopt criteria by July 1, 1970.

The language of the first two priorities for releases from Glen Canyon Dam appears straight forward, but there are still implementation questions. The first priority is to release water to meet the obligation of the Upper Division States to Mexico, if any. Today, the Upper Division States believe they have no obligation to Mexico, but the Lower Division States believe it’s at least 750,000 af per year. Thus, lacking either an agreement among the states or an interpretation of Article III(c) by the Supreme Court, this priority is unquantified. The second priority is to meet the Upper Division State’s 75 maf every ten years non-depletion obligation under III(d). It’s an average of 7.5 maf per year, but the language does not require a specific flow amount in any one year. To add uncertainty, the Upper Division States believe that if climate change, not Upper Basin depletions, is a cause of ten-year flows falling below 75 maf, there is no violation of Article III(d).

The third priority is more complicated (perhaps convoluted). It’s designed to address the question of how much holdover storage the Upper Basin can keep in the Lake Powell and the other CRSP reservoirs. Although the language may be confusing, the intent is simpler. The Upper Basin may keep as much storage as the Secretary determines necessary to allow the States of the Upper Division to meet their compact obligations during the most critical drought of record. If there is more than that amount in storage, then they must share the extra water with the Lower Basin, but only to the extent necessary to equalize active storage in Lakes Mead and Powell. Thus, was borne the term “equalization.”

A deck of punched cards comprising a computer program. The red diagonal line is a visual aid to keep the deck sorted. By ArnoldReinhold – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=16041053

After the 1968 Act passed, the Department of the Interior immediately began an effort to prepare a draft LROC. The effort involved a federal-state task force. It also involved the first comprehensive use of a computer to simulate numerous different reservoir operational scenarios (I wonder how many of us still remember the days of computer punch-card decks?). Interior officials quickly realized that the effort was going to be complicated and contentious. For Interior’s version of the events, see Chapter VII of the 1978 version of the Hoover Dam Documents. The contentious issues were the annual release amount from Glen Danyon Dam and how to calculate the amount of allowable holdover storage (now commonly referred to as “602(a) storage”). Colorado’s Felix Sparks put it this way: “Everything we do at Glen Canyon Dam is ultimately about the Colorado River Compact.”

After numerous meetings and conferences, on June 9, 1970, Secretary Walter Hickel formally approved the first LROC. Much of the language parroted the 1968 Act provisions for the CRSP reservoirs and for Lake Mead, the language of the 1964 decree implementing the 1963 decision in Arizona v. California. For the Upper Division States, however, the Secretary made three decisions that they strongly opposed. First, the LROC included a provision for an annual “minimum objective release” from Glen Canyon Dam of 8.23 maf. The problem was that this number was derived as 7.5 maf plus 750 kaf (the LB’s interpretation of the UB’s Mexican Treaty obligation) less 20 kaf (the mean flow of the Paria River). The Secretary accepted recommendations from the UCRC for language clarifying that the minimum objective release was an “objective” not a “requirement” and that the Secretary was not interpreting the Compact. The second problem was that the Secretary rejected their recommendation that a probability rule curve be used to set the 602(a) level.  Instead, the Secretary determined that the 602 (a) level would be set on an annual basis. Finally, with the adoption of the LROC, the UCRC recommended that the lake Powell filling criteria be terminated. The problem with the filling criteria from the Upper Division States perspective was that it required revenues from power generation at the CRSP units be used to keep the Lower Basin whole for the impact of filling Lake Powell on power generation at Hoover Dam. The Secretary rejected this recommendation and the filling criteria stayed in effect through 1980.

The rejection of its important recommendations left the UCRC members bitter. New Mexico State Engineer and UCRC Commissioner, Steve Reynolds, put in his plain-spoken language – “they crammed it down our throats” (expletive deleted).

SO WHAT HAPPENS IF WE CONTINUE TO USE THE LROC?

So, the big question is – if there is no agreement on post-2026 operating guidelines between the basins and the Secretary determines that the annual operation of Lakes Mead and Powell for Water Year 2027 (and perhaps beyond) will be guided by the LROC, what does this mean for the reservoirs?  For Lake Powell, the answer may be not much. It means an annual release of 8.23 maf (or perhaps 8.1 maf -taking into account the river inflows immediately below the dam). Depending on the runoff in 2025 and 2026, there’s a reasonable chance that this would be the amount released under a continuation of the 2007 Interim Guidelines. The differences are that there would be no balancing of the storage levels in Lakes Mead and Powell as is allowed by the three balancing tiers of the 2007 Interim Guidelines and if the next two years are dry, there could be some debate over whether the Secretary has the authority to reduce releases below 8.23 maf – something that might be needed given the need to protect elevations below 3,500 feet at Lake Powell because of concerns about use of its outlet works.. I believe the answer to this question is clearly yes. In a June 2, 2005, letter, Secretary Norton wrote “the Department retains the authority pursuant to applicable law and the Operating Criteria to adjust releases from Glen Canyon Dam to amounts less than 8.23 million acre-feet per year. Specifically, the Department transmitted the following statement to the Governors of each of the Colorado River Basin States on June 9, 1970: “…(T)he operating Criteria imposes no firm or fixed obligation the 8.23 million acre-feet be released each year from lake Powell. That quantity is stated as an “objective” ….”

As for releases greater than 8.23 maf, under the authority referenced in the June 2, 2005, letter the Secretary might also have the authority to increase releases.  The LROC, however, anticipated that the occasional releases greater than 8.23 maf would be made as equalization releases under the Section 602(a)(iii) third priority. The LROC provides that the Secretary determines the equalization or 602(a) storage level annually, but it appears that in the near to mid-term future, there is very little risk that the storage level in Lake Powell will be anywhere near a level that would require a large equalization release (as happened in 2011). Based on the table in the 2007 Interim Guidelines, the end of water year elevation of Lake Powell would have to exceed 3666’ (100’+ higher, or 10+ maf more than the current level). Further, I would argue that the 3666’ level is no longer current. It assumed that 1954-65 was the critical drought. The recent 2000-2022 drought is every bit as dry and twice as long as the 1954-65 drought, therefore, a better estimate of today’s 602(a) level is “all of the available CRSP storage plus a lot more.” The Upper Division State’s proposal, in fact, does not even include an equalization provision.  Furthermore, in separate studies in 1969 and 2004, Reclamation concluded that in the future, the 602(a) level would exceed the available CRSP storage capacity. This is one of the reasons that in 1970, the Secretary rejected the rule curve. Reclamation modelling concluded that with future Upper Basin development, the result of applying the UCRC’s proposed rule curve (98.4%) meant that all available CRSP storage was needed to protect the Upper Basin. For more information on “602(a),” see Reclamation’s 2004 Environmental Assessment on this subject. The Upper Basin depletions have not achieved the level of development anticipated in either 1969 or 2004, but natural flows have been far less. From Lake Powell’s perspective there is no difference between upstream depletions and climate change caused reductions in natural flow.

For Lake Mead, operating under the LROC may be more complicated. The “70R” criteria is a flood control strategy for Lake Mead. Given the current reservoir levels, the chances of encroaching on the flood control space in Lake Mead is very small. The most pressing problem would be that after the termination of the 2007 Interim Guidelines, there would be no “current” guidance on the specifics of when and how much for the shortage levels that would still need to be imposed on Lower Basin mainstem users in 2027 and beyond.  Under the 1964 Decree, however, the Secretary has the clear authority, if not a mandate, to set shortages. I think it’s likely that the Secretary and three Lower Division States would agree on Lake Mead deliveries. A more difficult question may be the level of the annual deliveries to Mexico. If there is no internal U.S. agreement on the post-2026 guidelines, will Mexico be interested in extending Minute 323?

Operating under the LROC might be manageable

The bottom line is that if there is no agreement among the Basin States for consensus post-2026 operating guidelines, it may not be the ideal outcome the states want but given the broad authority and flexibility the Secretary has under the 1970 LROC, the situation would be manageable. In fact, operating Lake Mead and Lake Powell under the flexibility provided by the 1922 Compact, Section 602 of the 1968 Act, and the 1970 LROC might provide opportunities for a more flexible management approach that can be designed to address a broader range of issues, including balancing recreation resources, and addressing environmental conditions in the Grand Canyon.

Map credit: AGU

The Loss of El Vado Dam — John Fleck (InkStain.net) #RioGrande

El Vado Dam and Reservoir. Photo credit: USBR

Click the link to read the article on the InkStain website (John Fleck):

April 10, 2024

The Bureau of Reclamation’s announcement at Monday’s meeting of the Middle Rio Grande Conservancy District that it is halting work on El Vado Dam repairs raises hugely consequential questions about water management in New Mexico’s Middle Rio Grande Valley.

The short explanation for the halt is that the current approach to repairing the 1930s-era dam wasn’t working. (The meeting audio is here, though at “press time” for this blog post this week’s is not yet up.) I’ll leave it to others to suss out the technical and bureaucratic details of the repair project, and the endless finger-pointing that’s sure to ensue. My interest here is to begin to sketch out the implications here in the Middle Valley of an indefinite period – a decade or more? – without El Vado.

The Middle Rio Grande Conservancy District built El Vado (with substantial federal subsidy) in the 1930s to provide irrigation supplies by storing high spring runoff for use in summer and fall. But while its purpose was irrigation, it completely changed the Middle Valley hydrograph in ways that all the other water uses have adapted to, both human and ecosystem.

Without El Vado (or some interim replacement – see below), we should expect the Rio Grande to routinely go functionally dry in late summer unless propped up by monsoon rains, which are sporadic and unpredictable.

I see impacts in three areas, only one of which is related to El Vado’s initial purpose.

Ristras of varying pod types and ripeness. By Christopher Holden from Albuquerque, United States – Ristras, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=95944700

1: IRRIGATION

This is the obvious one. Until El Vado is repaired or some sort of replacement schemed out, irrigators should expect a high risk of low or no supply in late summer and fall. Alfalfa will remain a reliable if modest crop (it can hunker down and wait out the dry), but the few commercial operators who need a more reliable supply for their crops – think pecans and chile – will have to depend on groundwater, with all the problems that entails.

The Albuquerque, New Mexico International Balloon fiesta. (October 2007). By Danae Hurst from Albuquerque, United States – Ballooning Over Albuquerque, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=6791765

2: MUNICIPAL SUPPLIES

Albuquerque’s use of its imported San Juan-Chama water in summer indirectly depends on El Vado. Without MRGCD water, released from El Vado, as “carriage water”, the Albuquerque Bernalillo County Water Utility has to leave its imported San Juan-Chama water parked in Abiquiu Reservoir, switching to groundwater. This is what we have done over the last few years, and our much-vaunted aquifer recovery has, as a result, stalled.

This poses a huge challenge for the Albuquerque Bernalillo County Water Utility Authority.

Rio Grande Silvery Minnow via Wikipedia

3: ENVIRONMENTAL FLOWS

The idea of an agricultural irrigation dam providing the water for environmental flows seems super weird. But that’s basically the way it’s worked for years here in the Middle Valley. Releases from El Vado, sent downstream to irrigators, provide environmental benefits along the way. For the last couple of years, without El Vado water to supplement flows in late summer, the Rio Grande has operated on a knife’s edge between flowing and dry through Albuquerque.

This poses a huge challenge for efforts to nurse the Rio Grande silvery minnow back from extinction.

Abiquiu Dam, impounding Abiquiu Lake on the Rio Chama in Rio Arriba County, New Mexico, USA. The U.S. Army Corps of Engineers constructed the dam in 1963 for flood control, water storage, and recreation. By U.S. Army Corps of Engineers, photographer not specified or unknown – U.S. Army Corps of Engineers Digital Visual LibraryImage pageImage description pageDigital Visual Library home page, Public Domain, https://commons.wikimedia.org/w/index.php?curid=2044112

STORAGE ALTERNATIVES

First and foremost, there is a fast-moving and scrambling discussion about storage alternatives.

Abiquiu Reservoir, a flood control facility on the Rio Chama built, owned, and managed by the U.S. Army Corp of Engineers, is an obvious replacement. The part in italics yields knowing nods, or perhaps grimaces, from folks who work in Middle Valley water management, because the Corps is well known for an exceedingly cautious interpretation of its statutory mandates. “Filling in as a water storage facility to replace El Vado” is only sorta barely at the edge of that mandate. Getting the Corps on board to help with this fix will be key.

Heron Lake, part of the San Juan-Chama Project, in northern New Mexico, looking east from the Rio Chama. In the far distance is Brazos Peak (left) and the Brazos Cliffs (right), while at the bottom is the north wall of the Rio Chama Gorge. By G. Thomas at English Wikipedia – Transferred from en.wikipedia to Commons., Public Domain, https://commons.wikimedia.org/w/index.php?curid=1598784

Heron Reservoir, on a Rio Chama tributary, stores San Juan-Chama water imported through tunnels beneath the continental divide. It physically can’t replace El Vado because it’s in the wrong place. But discussions have already touched on the idea of doing it on paper via accounting swaps – hold back San Juan-Chama water, let SJC customers use native Rio Grande water via an accounting swap, then deliver Heron water as if it had been El Vado water.

Downstream of Elephant Butte Dam (back in the day), water issues get even trickier. By Unknown author – http://www.usbr.gov/power/data/sites/elephant/elephant.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1267389

Elephant Butte? Again, it’s in the wrong place, but accounting swaps here are also on the table.

INSTITUTIONAL FRAMEWORK

The most important subtext is the institutional framework behind all of this. The loss of El Vado is not solely an MRGCD/Bureau of Reclamation problem. It implicates all the Middle Valley’s water stakeholders – especially Albuquerque’s Water Utility Authority, but also the Corps of Engineers, the Fish and Wildlife Service (because of ESA issues), the state water agencies, the communities on the valley floor that have avoided responsibility for any of this by depending on the state’s obscenely permissive domestic well statute.

New Mexico Lakes, Rivers and Water Resources via Geology.com.

Navajo Dam operations update: Bumping releases down to 350 cfs April 16, 2024 #SanJuanRiver #ColoradoRiver #COriver #aridification

The outflow at the bottom of Navajo Dam in New Mexico. Photo: Brent Gardner-Smith/Aspen Journalism

From email from Reclamation (Susan Novak Behery):

April 15, 2024

In response to increasing flows in the critical habitat reach, the Bureau of Reclamation has scheduled a decrease in the release from Navajo Dam from 500 cubic feet per second (cfs) to 350 cfs for tomorrow, April 16th, at 4:00 AM.

Releases are made for the authorized purposes of the Navajo Unit, and to attempt to maintain a target base flow through the endangered fish critical habitat reach of the San Juan River (Farmington to Lake Powell).  The San Juan River Basin Recovery Implementation Program recommends a target base flow of between 500 cfs and 1,000 cfs through the critical habitat area.  The target base flow is calculated as the weekly average of gaged flows throughout the critical habitat area from Farmington to Lake Powell.

Five Major Proposals for Post-2026 management of the #ColoradoRiver — John Fleck (Inkstain.net) #COriver #aridification

AI image. Credit: Sibley’s Rivers

Click the link to read the article on the Inkstain website (John Fleck):

April 3, 2024

With the submission of two additional proposals last week, we now have five major proposals for post-2026 Colorado River management.

The folks at the Water and Tribes Intitiative have helpfully organized them in a single place. (Click on the
“Proposed Alternatives for Post-2026 Operating Guidelines” bubble.)

TRIBAL PRINCIPLES

A set of guiding principles proposed by 17 of the basin’s sovereign indigenous communities. (click here)

UPPER BASIN PROPOSAL

What the label says, you already know about this one. (click here)

LOWER BASIN PROPOSAL

What the label says, you already know about this one. (press releasealternativepresentation)

ENVIRONMENTAL NGOS

The “Big Seven” Colorado River Basin environmental groups (click here)

LAKE POWELL/GRAND CANYON/LAKE MEAD ECOSYSTEM PROPOSAL

A proposal from Jack Schmidt, Eric Kuhn, and John Fleck suggesting ways to manage the storage and distribution of water to provide more flexibility for environmental and other non-water supply benefits. (click here)

Memo reveals damage to pipes inside #GlenCanyon Dam, a threat to #ColoradoRiver water supply — 8NewsNow.com #COriver #aridification

The back of Glen Canyon Dam circa 1964, not long after the reservoir had begun filling up. Here the water level is above dead pool, meaning water can be released via the river outlets, but it is below minimum power pool, so water cannot yet enter the penstocks to generate electricity. Bureau of Reclamation photo. Annotation credit: Jonathan P. Thompson

Click the link to read the article on the 8NewsNow.com website (Greg Haas). Here’s an excerpt:

 April 12, 2024

Nearly a year ago, the Colorado River was raging through the Grand Canyon, carrying enough water to raise Lake Mead by an astonishing 2½ feet in just five days. The surge that began on April 25, 2023, was part of a “High Flow Experiment” release from Glen Canyon Dam, churning up sediment to rebuild beaches and sandbars through the canyon. But the pipes used to send that gush of water from Lake Powell through Glen Canyon Dam are in trouble, a memo produced by the U.S. Bureau of Reclamation reveals.

“In summary, at reservoir levels below the minimum power pool (elevation 3,490 ft), there are concerns with relying on the river outlet works as the sole means of sustained water releases from Glen Canyon Dam,” the memo said.

The “river outlet works” is a backup system at Glen Canyon, used infrequently because Reclamation needs to generate as much electricity as possible by sending water through the hydropower penstocks, a much larger set of tubes higher up…A special inspection that happened around last year’s High Flow Experiment found erosion within the four 8-foot pipes of the river outlet works. The evidence of “cavitation” is being described by conservation groups as a new part of the “spectacular water crisis” that demonstrates the magnitude of problems with the dam. Cavitation produces shock waves that are powerful enough to damage steel, according to David Wegner, who worked 20 years as an engineer for Reclamation. He was lead scientist for environmental impact studies of Glen Canyon Dam, and a founding member of the Glen Canyon Institute. Wegner is now a senior staff member for the U.S. House of Representatives Water Resources and Environment Subcommittee. He is also a member of the National Academy of Sciences Water Science and Technology Board.

Glen Canyon Dam high flow release photo 2018.

#ColoradoRiver district seeks Summit County’s help in clinching $99 million Western Slope water rights deal — The Summit Daily #COriver #aridification

Shoshone Hydroelectric plant. Photo credit: The Colorado River District

Click the link to read the article on the Summit Daily website (Robert Tann). Here’s an excerpt:

April 9, 2024

During a Tuesday, April 9, Summit Board of County Commissioners meeting, river district General Manager Andy Mueller told officials that his organization’s efforts to acquire water rights along a segment of the Colorado River “is vital to the health of all of our rivers in the Western Slope.”

Western Slope communities aren’t the only beneficiaries of the current system, with the [Shoshone Hydroelectric] plant’s water rights strengthening flows in Grand, Summit and Eagle counties, providing security to areas that depend on the Colorado River for a host of economic and environmental reasons. If the current water rights were not in place, the main beneficiaries would be Denver Water and other trans-mountain diverters which would experience increased yield through their respective collection systems, according to the river district…

In order to keep the same volume of downstream flow under new ownership, the river district will need to secure a water right for an instream flow, which can only be operated by the Colorado Water Conservation Board. The river district is currently in talks with the board to create a contract to do just that. But the crux of the river district’s deal is the water right’s $99-million price tag. 

This new proposal for #ColoradoRiver sharing prioritizes the environment — KUNC

A bird perches upon towering mud banks left behind by a shrinking Lake Powell on July 5, 2022. A new proposal for managing the Colorado River and its reservoirs encourages states to include environmental protections as they draw up water sharing plans. Photo credit: Alex Hager/KUNC

Click the link to read the article on the KUNC website (Alex Hager):

This story is part of ongoing coverage of the Colorado River, produced by KUNC and supported by the Walton Family Foundation. It was produced in partnership with The Water Desk, an independent initiative of the University of Colorado Boulder’s Center for Environmental Journalism.

April 1, 2024

A coalition of environmental groups is proposing a new set of rules for managing the Colorado River after 2026, when the current guidelines expire. Their proposal, which aims to weave environmental protections into river management policy, comes amid heated negotiations about how the shrinking river should be shared in the future.

In March, the seven states which use the river found themselves divided into two camps, each faction publishing its own proposal for managing water. The two groups have promised to work towards consensus and are aiming to agree on a singular plan before 2026. The authors of the new environmentally-focused proposal — a group of seven conservation nonprofits — say they don’t expect their own plan will be adopted in full, but hope to encourage state and federal water managers to consider plants, animals and ecosystems while drawing up their own Colorado River policies.

“If you integrate these ideas into those annual operations, you can have your water security — which the states want — but then you also get these environmental benefits that make sure that you do have a healthy flowing river that is the foundation for the entire system,” said John Berggren, a water policy expert at Western Resource Advocates, one of the conservation groups that co-signed the proposal.

All seven of the organizations that crafted the river management proposal receive funding from the Walton Family Foundation, which also supports KUNC’s Colorado River coverage.

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

Current negotiations about how to share the Colorado River are driven by one defining fact: The water supply for 40 million people across the Southwest is shrinking due to climate change. Talks about how to rein in demand accordingly have been contentious since states are reluctant to cut into water supply for the cities, farms and ranches within their borders.

Fish biologist Dale Ryden holds a razorback sucker on Jan. 26, 2024. The native fish species is one of many in the Colorado River protected by the Endangered Species Act. Photo credit: Alex Hager/KUNC

The “Cooperative Conservation Alternative,” as dubbed by the environmental proposal’s authors, offers a series of ideas on how to make sure decisions about the water supply for people and businesses don’t leave the environment behind.

The first idea outlined in the proposal is the implementation of a new way of measuring how much water is stored in reservoirs along the Colorado River, with water releases adjusted accordingly. Among other tweaks to measuring reservoir storage, the proposal suggests adjusting reservoir releases according to recent trends in climate conditions. For example, the new method would take into account snowmelt lost to dry, thirsty soilswhen determining release levels following particularly dry years.

The environmental groups also want to see fish habitats considered as a factor when determining how much water is released from major reservoirs. The proposal cites the health of aquatic ecosystems in the Grand Canyon, where native fish are threatened by predatory invasive species that have been able to travel downstream due to dropping water levels in Lake Powell – the nation’s second largest reservoir.

The proposal also suggests the creation of a “Conservation Reserve,” a program that would allow water users to store some of their supply in major reservoirs. That stored water would be used to help avoid low reservoir levels that could damage infrastructure– including hydropower generators – but would not be counted when determining how much water is released from major reservoirs in a given year. The “Conservation Reserve” would replace the existing “Intentionally Created Surplus” program.

The conservation groups say the ideas in their proposal are designed to benefit the environment, but shouldn’t be seen as objectionable by the water users along the Colorado River or the states which ultimately have the most say in the river’s fate.

“That water supply is available to all of us because of the function of the river as an ecosystem itself,” said Jennifer Pitt, Colorado River program director at the National Audubon Society. “If we ignore that entirely, and the system that sustains that functioning waterway erodes and breaks down, we may lose some of its ability to deliver us water in the first place.”

Pitt also said more robust ecosystem protections can occasionally help water users stay in legal compliance with environmental rules. There are 27 species covered by the Endangered Species Act in the lower Colorado River basin, and water users can face penalties if they’re unable to leave enough water in the river to maintain healthy habitatsfor those protected species.

A toad climbs a rock in a canyon near Lake Powell on July 6, 2022. The authors of a new proposal to protect ecosystems along the Colorado River said a healthy flowing river would benefit human water users as well as plants and animals. Photo credit: Alex Hager/KUNC

The environmental proposal joins prior suggestions from the Colorado River’s upper basin states of Colorado, Utah, Wyoming and New Mexico, and a competing proposal from the lower basin states of California, Arizona and Nevada.

Native America in the Colorado River Basin. Credit: USBR

A number of the 30 federally-recognized Native American tribes that use the Colorado River may also be working on water management proposals. The Gila River Indian Community in Arizona, which has positioned itself as a major tribal player in water management talks, said it did not support the lower basin states’ plan released in March and will soon release its own suggestions for managing the river.

A separate group of 16 tribes sent a letter to the Bureau of Reclamation – the federal agency that manages Western dams and reservoirs – outlining a series of “principles” the tribes want to see reflected in final Colorado River management plans.

While the current rules for sharing the river are set to expire in 2026, the Biden administration’s water officials want to arrive at a final set of replacement rules by the end of 2024 to avoid any complication that could come from a change in presidential administration after the November election.

Map credit: AGU

#GrandJunction commits $1 million to Shoshone water right purchase — The Grand Junction Daily Sentinel #ColoradoRiver #COriver #aridification

Shoshone Falls hydroelectric generation station via USGenWeb

Click the link to read the article on The Grand Junction Daily Sentinel website (Sam Klomhaus). Here’s an excerpt:

April 5, 2024

“The idea that we would allow this archaic little water right to disappear and watch it get siphoned off to benefit someone else’s future is really hard to take if you live and thrive here in Western Colorado.” — Colorado River District General Manager Andy Mueller

The city of Grand Junction became the latest entity to contribute to an effort to preserve a senior water right on the Colorado River Wednesday after City Council voted unanimously to pledge $1 million to the cause. The water right is from the Shoshone power plant in Glenwood Canyon, and provides 1,250 cubic feet per second under the senior right, and 158 cubic feet per second under the junior water right.

“It’s one of the oldest, largest rights on the Colorado River within our state,” said Colorado River District General Manager Andy Mueller said at Wednesday’s meeting. “It’s very unique in that it’s a non-consumptive water right built and first decreed in 1902 to generate hydroelectic power.”

In December, Xcel Energy and the river district agreed on a sale of the water rights for $99 million…Mueller said communities have relied on this water right for recreation, agriculture and development.

#Aridification Watch: #Snowpack is normal in most places — for what it’s worth: Also: The West loses a fierce voice — Jonathan P. Thompson (@Land_Desk)

The North Fork Valley in western Colorado. Jonathan P. Thompson photo.

Click the link to read the article on The Land Desk website (Jonathan P. Thompson):

Jim Stiles. Photo credit: The Canyon Country Zephyr

The Canyon Country lost an important, fierce, and sometimes curmudgeonly voicelast month when Jim Stiles died at his home in Clearwater, Kansas. Stiles founded the Canyon Country Zephyr in Moab, Utah, in 1989, and continued to publish, edit, and do much of the writing for the publication in its various forms right up to his death. 

I didn’t always agree with Stiles. We sparred, sometimes heatedly, over his opposition to the designation of Bears Ears National Monument. I think we felt a similar disappointment in the gentrification of Moab and other parts of the Canyon Country, but disagreed on the causes, and had it out a couple times over that. But I always admired and respected him, his writing, his thinking, and his tenacity in “clinging hopelessly to the past,” as the Zephyr’s tagline reads. 

I don’t know what will happen to Zephyr going forward, though it’s hard to imagine it without Stiles’ involvement in some form. But for now the website still exists, with archives going back to 2011. I’d suggest heading over there and checking it out while you still can.

Watch for an essay on Moab, Stiles’ old stomping ground, in next Tuesday’s Land Desk.

🥵 Aridification Watch 🐫

The Upper Colorado River snowpack appears to have peaked a day or two earlier than normal, but 10% higher. We’ll take it.

Just about normal: That sums up snowpack levels across much of the Southwest right now. And you know what? Normal feels like a reason to celebrate following more than two decades of aridification and megadrought. Except for one little thing. As the great Bruce Cockburn sings: 

The trouble with normal is it always gets worse. 

Okay, when it comes to snowpack it may not always get worse. But since “normal” is a moving average based on 30-year segments, and the current “normal” is pegged to 1990 to 2020 — one of the driest periods in the last 1,200 years or so — then it’s fair to conclude that normal has, indeed, gotten worse

Note that in the Upper Rio Grande, the current snowpack level (after taking a big drop over the last couple days) is right at the 1991-2020 normal, but still below the period-of-record normal, which extends back into the super-moist 1980s. And normal on the Rio Grande typically means it will run dry through Albuquerque sometime this summer. Bummer.
March was a big one for folks getting caught in avalanches in Colorado, but fortunately there were no fatalities. So far this season avalanches have killed 13 people nationwide.

But even so, this year’s snowpack is a heck of a lot better in most places than it was a few years ago — at least so far. During that 1990-2020 period, the snowpack’s median peak for most watersheds has occurred in early April. Whether the spring runoff is as healthy as the snowpack, though, depends a lot on what happens next. A wet, cool spring could boost the snowpack even more, pushing the peak forward and delaying the peak runoff, which is good for lowland water supplies and could further boost reservoir levels.

Black line = 2024; Purple = 2023; Red = 2021. As you can see, the North Fork is sitting right at normal these days.
Southwestern Colorado’s snowpack appears to have peaked at the usual time, before dropping off rather quickly due to a pair of warm days. Note the big boosts in February and March, saving the region from a disastrous 2021-esque snowpack. Will high April winds and dust melt it off too quickly?

But a warm, windy, dry April and May? Not so good. Warm days and nights will speed up the snowmelt and affect runoff. But the real dastardly culprit is that wind (which is kicking up in the North Fork Valley as I write this), which not only sucks moisture out of the snow, but also lifts up dust from the lowlands and deposits it on the high country snowfields, lending them a reddish brown tint. That, in turn, reduces the snow’s albedo, or ability to deflect the sun’s rays, which causes the snow to melt and evaporate more quickly. 

Either way, Lake Powell’s levels will rise somewhat over the next few months. The question is by how much and, more importantly, how significant the summer decline will be. Meanwhile, all that normal-ness should keep the reservoir from dropping to critically low levels for at least another year. 

Oof. The snowpack in the Flathead drainage in Montana is at critically low levels right now — near record-low levels, in fact. Yikes.

The same cannot be said for reservoirs further north, however. Snowpack levels in Montana and Wyoming and much of the Northwest are frighteningly low. While those rivers aren’t endangered in the way the Colorado River is, the meagre winter snows are expected to diminish hydropower output from the Northwest’s dams this summer, which will likely force grid operators to rely more heavily on fossil fuel generation.


Dust, snow, and diminishing albedo — Jonathan P. Thompson, May 7, 2021

The McElmo Dome, Mesa Verde, and Ute Mountain, obscured by dust. Heavily grazed lands are in the foreground. The view was blotted out altogether later that day. Jonathan P. Thompson photo.

Most of us are poor now, like I am. Many of them blame John Collier, who made us reduce our flocks and herds because there was not enough grass for all. But I think the true reason is a change in the climate. When I was a young man this whole country was covered with tall grass. We had rains enough in summer to keep it alive and growing. Now the rains do not come and the grass dies. There are fewer sheep and horses now than when our family claimed this valley, yet all you can see is sand. The grass is gone. 

“All we need to be rich again is rain.

—Navajo elder Hoskannini-Begay, who lived on Naatsis’áán, or Navajo Mountain, near the confluence of the San Juan and Colorado Rivers, to Charles Kelly in 1945 

Read the full story.

Gila River Indian Community says it doesn’t support latest #ColoradoRiver sharing proposals — KUNC #COriver #aridification

Stephen Roe Lewis, Governor of the Gila River Indian Community, speaks in Tucson, Ariz. on Mar. 13, 2024. The tribe has been a high-profile partner to federal and state water managers in recent years, but Lewis said it does not support the latest Lower Basin proposal for post-2026 Colorado River management. Credit: Alex Hager/KUNC

Click the link to read the article on the KUNC website (Alex Hager):

March 13, 2024

This story is part of ongoing coverage of the Colorado River, produced by KUNC in northern
Colorado, and supported by the Walton Family Foundation.

The Gila River Indian Community says it does not support a three-state proposal for managing the Colorado River’s shrinking supply in the future. The community, which is located in Arizona, is instead working with the federal government to develop its own proposal for water sharing.

The tribe is among the most prominent of the 30 federally-recognized tribes that use the Colorado River. In recent years, it has signed high-profile deals with the federal government to receive big payments in exchange for water conservation. Those deals were celebrated by Arizona’s top water officials. But now, it is diverging from states in the river’s Lower Basin — Arizona, California and Nevada.

Stephen Roe Lewis, The Gila River Indian Community’s Governor, announced his tribe’s disapproval of the Lower Basin proposal at a water conference in Tucson, Ariz., while speaking to a room of policy experts and water scientists.

“This is not the time to be standing on the sidelines,” Lewis said. “We all have a responsibility to do what we can. And that’s why The Community can’t support the current Lower Colorado River approach as it stands now.”

The announcement adds a new wrinkle to an already-complicated process. Last week, the seven states that use the Colorado River unveiled competing plans for managing its water. The Lower Basin states revealed one, and the Upper Basin states – Colorado, Utah, Wyoming and New Mexico – revealed another. The opposing plans represent stark ideological differences between the two groups of states, marking the latest disagreement between rival camps that have argued over water management for decades.

Lewis, who has positioned his tribe as an ally to the federal government in helping save water, outlined a few major sticking points that led Gila River to work on its own proposal.

Water enters an irrigation canal on the Gila River Indian Reservation on May 7, 2021. The Gila River Indian Community is among the most important tribal players in ongoing negotiations about using water from the Colorado River. Photo by Ted Wood/Water Desk

One issue, Lewis said, is that the Lower Basin’s proposal creates an “unfair burden” on the state of Arizona. Under the proposed plan, all seven states would have to cut back on demand for water if levels in the nation’s largest reservoirs — Lake Mead and Lake Powell — drop below a predetermined trigger in the future. Arizona would take the largest of those cutbacks.

Another, he said, is that the Lower Basin’s plan does not explain how it would mitigate the impact of those potential new water cutbacks. Lewis said he would like to see plans to identify new sources of water away from the Colorado River that could replace water lost to cutbacks, or financial compensation.

States are under pressure to agree on plans to manage the river before 2026, when the current guidelines for sharing its water expire. Both of last week’s plans came just ahead of a deadline from the Bureau of Reclamation, the federal agency which manages the West’s dams and reservoirs. The deadline was an effort to get the ball rolling on new river rules with enough time to implement them before a potential change in administration after the upcoming November election.

Reclamation officials said they expect to work with states over the spring and summer and reach a draft for post-2026 river management rules by the end of 2024.

Now, Lewis and his staff are working with Reclamation on what could potentially be a third competing proposal. He said he hopes a proposal will be released in “weeks,” rather than months.

“It’s potentially not just the Gila River, because this will affect other tribes as well,” Lewis said. “I wouldn’t be surprised if other tribes started to register their concerns as well.”

As states and the federal government draw closer to a new set of river management rules, some tribes have repeatedly expressed frustration about being excluded from negotiations. Tribal communities often lack reliable access to clean water due to aging infrastructure and a history of underinvestment, and many are calling for greater inclusion going forward.

Lewis said that was not the issue in this case, and that the Gila River Indian Community was included in talks.

“We were at the table,” Lewis said. “It’s just the proposal, the finished product as it is right now, doesn’t reflect our concerns.” [ed. emphasis mine]

North American Indian regional losses 1850 thru 1890.

Cooperative Conservation NEPA Alternative: Post-2026 #ColoradoRiver Operations and Strategies — via WaterForColorado.org #COriver #aridification

Click the link to read the proposed guidelines on the Water for Colorado website. Here’s the introduction:

On behalf of our respective organizations, the undersigned conservation groups (Conservation Groups or Groups) submit the Cooperative Conservation Alternative (Cooperative Conservation) to contribute to the ongoing dialogue shaping the future of the Colorado River through the post-2026 NEPA process for developing Colorado River Guidelines and Strategies.

The Groups request the Bureau of Reclamation include Cooperative Conservation in its analysis of post-2026 Colorado River Guideline Operations and Strategies as a forward-looking, comprehensive approach for addressing the pressing and evolving challenges facing the Colorado River Basin, its ecosystems, and the diverse community of sovereigns and stakeholders who rely upon its resources.

Cooperative Conservation is designed to inform and enhance one or more alternatives for consideration in developing the post-2026 Colorado River Operations and Strategies Environmental Impact Statement (EIS). It emerges from a synthesis of lessons learned, a deep understanding of the Basin’s environmental dynamics, and a commitment to collaborative, equitable water management, and endeavors to introduce innovative strategies that balance the needs of human and natural systems under the shadow of climate change and increasing water scarcity. [ed. emphasis mine]

The urgency to redefine the framework for Colorado River operations cannot be overstated. The Bureau of Reclamation’s (Reclamation) notice of intent to prepare an EIS for the post-2026 Colorado River marks a critical step toward addressing the Basin’s future needs (“Notice of Intent To Prepare an Environmental Impact Statement for Post-2026 Colorado River Operational Guidelines and Strategies for Lake Powell and Lake Mead,” 88 Fed. Reg. 12345 (June 16, 2023)). The existing guidelines, while pioneering at the time of their inception, are now recognized as insufficient to navigate the complexities of prolonged drought, escalating impacts of climate change, and pressing needs of a diverse array of sovereigns and stakeholders. Cooperative Conservation is rooted in the recognition that the Colorado River Basin has entered an era of uncertainty, where traditional management approaches must be reevaluated in light of scientific advancements, changing hydrological patterns, and the imperative of sustainability.

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

The significance of this Alternative lies not only in its aim to expand consideration of ways to address the immediate challenges, but also in its vision for a resilient and adaptive future that honors the interdependence of all who share this vital river. By embracing a holistic perspective that integrates scientific insight, stakeholder inclusivity, and environmental stewardship, our alternative is a framework for optimizing every drop of the Colorado River to better ensure it can remain a life-sustaining resource for future generations.

As the Conservation Groups submit this Alternative, we are mindful of the collective effort required to steward the Colorado River through the challenges ahead. We look forward to engaging in a constructive dialogue with Reclamation, the Basin States and Tribes, and all interested stakeholders involved in this essential process, united by our shared commitment to the River that sustains us all.

Map credit: AGU
Native America in the Colorado River Basin. Credit: USBR

Romancing the River: To Halve and Have Not — George Sibley (Sibley’s Rivers) #ColoradoRiver #COriver #aridification

AI image. Credit: Sibley’s Rivers

Click the link to read the article on the Sibley’s Rivers website (George Sibley):

In my last post, I reported that the water mavens of both the Upper and Lower Colorado River Basins had each presented the Bureau of Reclamation with plans for managing the river after 2026, when the current, amended ‘Interim Guidelines’ expire.

The Interim Guidelines had been implemented in 2007, remember, when it was obvious that the patchwork of existing ‘Law of the River’ (LOTR) guidelines, laws, treaties, compacts and other measures propping up the Colorado River Compact were failing to constructively guide the extensive storage and distribution systems imposed on the river through the turn-of-the-century drought that had begun six years earlier.

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

The Bureau and the seven states have since cobbled together – with help from a big snowpack in the 2023 water year and a rain of cash from the Biden administration’s infrastructure acts – a set of added interim actions to stagger through the remainder of the interim to 2026. The immediate emergency out of the way, the Bureau asked the water leaders of the seven states, and of the 30 First People nations in the river basin that will no longer allow the states to ignore them, to come up with a plan for managing the river works from 2027 through – well, another interim, maybe another 20 years. In a time of climate change and political chaos, we no longer think ‘in perpetuity’ (which never worked out anyway).

So the water leaders gathered for several meetings, to try to come up with a plan for managing the river after 2027. But they were not succeeding, so the predictable happened: they went home to the two Basins established by the 1922 River Compact, and each group prepared an ‘alternative plan’ for the management of the river.

I’ve created a fairly detailed side-by-side comparison of the actions each alternative proposes when triggered by diminishing levels of storage in the reservoirs; it would not, however, be readable in the format of these posts, so you can click here to bring up a readable copy. Meanwhile, here is a summary of some of the main points, similarities and differences between the two alternatives.

Both alternatives are similar conceptually: they operate on a measure of storage in some of the reservoirs on the river, with changes in the total content of the selected reservoirs triggering reductions in consumptive use by one or both Basins. Each alternative, however, uses a different set of reservoirs as the base – and a different date for measuring the content of the reservoirs.

The Lower Basin alternative wants the measuring standard to be the live storage of the major reservoirs in the river’s storage system: the four large Colorado River Storage Project reservoirs in the Upper Basin (Powell, Flaming Gorge, Blue Mesa and Navajo), and the three mainstem Lower Basin reservoirs (Mead, Mojave behind Davis Dam and Havasu behind Parker Dam) – a total of ~58 million acre-feet (maf) when they are full, which they currently are not. And they want the total system content to be measured on August 1 every year, a time when the reservoirs are still relatively full after runoff. (‘Live storage’ is the volume minus the ‘dead pools’ that cannot be delivered past the dams.)

Lake Mead key elevations. Credit: USBR

The Upper Basin alternative wants to measure only the live storage of Mead and Powell Reservoirs, minus an undefined ‘threshold volume’ for each of them – 4.2 and 4.7 maf respectively (probably the quantity required to keep the reservoir levels up to power-generating capacity?). This would probably be in the neighborhood of 40 maf when both reservoirs are full, which they are not. And they want the annual measure to be on October 1, the beginning of the new water year, a time when storage has been somewhat depleted by agricultural use.

The structural deficit refers to the consumption by Lower Basin states of more water than enters Lake Mead each year. The deficit, which includes losses from evaporation, is estimated at 1.2 million acre-feet a year. (Image: Central Arizona Project circa 2019)

Both alternatives are in agreement that reductions in use have to start with the Lower Basin cutting its use by the amount of the ‘structural deficit’ – the system losses through evaporation, riparian transpiration, et cetera, a total of ~1.5 maf. This decrease starts linearly when total storage as measured by the Lower Basin drops to 70 percent of full and ramps up to 1.5 maf when/if storage drops to 58 percent. The Upper Basin alternative has the Lower Basin starting its 1.5 maf reduction when its measure of storage is at 90 percent of full, and ramps up to 1.5 maf at 70 percent. With storage, however it is measured, chronically well down in the 30 percents these days, the Lower Basin could count on leaving 1.5 maf in Mead for the foreseeable future under either alternative.

The big difference between the two alternatives comes when or if storage drops to 38 percent by the Lower Basin’s measure of total system storage, and 20 percent of Powell-Mead storage by the Upper Basin measure. At that point – basically panic time – the Lower Basin wants both Basins to begin to ramp up to an additional 2.7 maf feet of reductions, to a total of 3.9 maf – basically the 4 maf in reductions the Bureau asked for in the panicky days of 2022.

The Upper Basin, however, wants the Lower Basin to do all of the 2.7 maf in reductions, on top of the 1.5 the Lower Basin will still be doing. Their justification: if river storage drops to those levels, then the Upper Basin, much of which has no storage to rely on, will already have had reductions at least that bad imposed by nature’s ‘hydrologic shortages.’ To make them do additional reductions to send more to the reservoirs would be the equivalent of double taxation.

The Upper Basin Alternative also throws a wild card into the game; it unilaterally grants itself the prerogative to ‘undertake parallel but separate activities that are not a part of this federal action or part of the [UB] Alternative. Parallel activities refer to actions in the Upper Basin that are beyond the scope of the Post-2026 Operations, but may complement those operations.’

The ‘parallel activities’ are briefly described as (but not limited to) activities like retaining the right move waters among the big Colorado River Storage Project reservoirs under pre-existing Records of Decision, and carrying out conservation programs like the Upper Basin’s Pilot System Conservation Program that pioneered the ‘paid reductions’ that are the core of the program to get the river system through 2026 (a pilot program partly paid for by large Lower Basin organizations). It may be too much read into this a kind of ‘declaration of independence’ for the Upper Basin, but it is an independent step toward adaptive management that might make the Lower Basin, accustomed to dependable deliveries from the Upper Basin a little nervous….

September 21, 1923, 9:00 a.m. — Colorado River at Lees Ferry. From right bank on line with Klohr’s house and gage house. Old “Dugway” or inclined gage shows to left of gage house. Gage height 11.05′, discharge 27,000 cfs. Lens 16, time =1/25, camera supported. Photo by G.C. Stevens of the USGS. Source: 1921-1937 Surface Water Records File, Colorado R. @ Lees Ferry, Laguna Niguel Federal Records Center, Accession No. 57-78-0006, Box 2 of 2 , Location No. MB053635.

And there’s one nice thing to see: both alternatives seem to bypass the Colorado River Compact mandate that the Upper Basin ‘will not cause the flow of the river at Lee Ferry to be depleted below’ an annual average of 7.5 maf, come hell or low water, or the big bad Lower Basin will come after your water to make it up. When the live storage drops to the low 20 percents in both alternatives, the releases from Powell drop to 6.0 maf – with no language implying a ‘call’ on the Upper Basin if that amount is unavailable. (Not that any such language ever existed in the Compact.)

Speaking of the Colorado River Compact. Yes, we cannot escape it. It is difficult to look at this situation and not see the Compact at work, and as usual, not in a constructive way.

Forty-seven years ago, in 1977, one of the Colorado River’s droughtier years – an estimated natural flow of 5.8 maf, third lowest since measuring began – I wrote an article about the Colorado River for a magazine that wanted ‘something about the drought.’ Figuring correctly that the drought emergency would be over by the time an article would be published, I wrote a long essay about how the drought was not a problem that year for the Lower Colorado River because of the huge storage it had – but how it could be facing problems in the future if it continued uncontrolled growth. (That article, ‘The Desert Empire,’ is archived on this site.)

The back of Glen Canyon Dam circa 1964, not long after the reservoir had begun filling up. Here the water level is above dead pool, meaning water can be released via the river outlets, but it is below minimum power pool, so water cannot yet enter the penstocks to generate electricity. Bureau of Reclamation photo.

But one thing I observed then as a possible source of future difficulty was the political division of the river into two basins. It was only a ‘paper division’ in the Compact, but it became concrete, as it were, when Glen Canyon Dam began to fill in 1963, finally finishing filling three years after this observation about its impact in that 1977 essay:

Glen Canyon Dam backs up a body of water … which amounts to nearly the equivalent of what flows down the Colorado River in two years. The amount of water that flows out of the lake reflects not the influx from upriver but demands from downriver.

This being the case, it seems just sentimental to continue to think of the Colorado River as a single entity. For all practical purposes there are now two rivers – interdependent, to be sure, but separate, and under separate management…. To describe the two rivers in the simplest possible manner: the Upper Colorado River is generally patterned after a ‘natural’ river, with many sources and a single destination. The Lower Colorado River, on the other hand, is patterned more after, say, a municipal waterworks, with a single primary source and many destinations. [ed. emphasis mine]

Now, a century after the Compact divided the river into two basins, and almost half a century after that observation about the post-dam river(s) – how can we look at this situation in which the water mavens from the (once) whole river sat down together to try to come up with a plan for managing the system imposed on the river(s), but after only a few days’ effort, withdrew to their ‘Upper and Lower Colorado Rivers’ to work out their River’s separate perspective on the problem? This may be the apotheosis of the Colorado River Compact, the completion of the division into two river basins whose users don’t always seem to remember they are all on the same river. Both alternatives express a willingness by their makers to reassemble as one group, but….

Map of the greater Colorado River Basin which encompasses the Colorado Plateau. Credit: GotBooks.MiraCosta.edu

The natural river itself encourages this kind of separation, with a region of mostly uninhabited (if often visited) canyons constituting close to a fourth of the length of the river, separating two regions of human activity. This kind of a ‘devoid’ in the middle part of a river basin is probably just nature in the middle of some of its endless work. The river probably began as two rivers, running off the Colorado Plateau in opposite directions, that eroded into each other and are still in the contentious process of becoming one river (as soon as they are able to completely eliminate the Colorado Plateau through all their magnificent work-in-progress erosions).

The two areas of human activity above and below the canyons have evolved over the past century and a half in ways consistent with the nature of the river that runs through them. Above the canyons, mountains dropping into piedmont plateaus, carved and deposited by many small streams flowing together into larger streams, all encouraging modest scales of cultural development, by individuals or small communities, a refuge for a time for Jefferson’s and Powell’s ‘agrarian counterrevolution.’

Back of Hoover Dam prior to first fill photo via Reclamation.

But the other river, below the canyons, flowed out of the canyons in a powerful seasonal flood or, later, a comparative trickle, a desert river, an anomaly doing nothing for the desert but moving its silt and sand farther toward the ocean. This was a river just waiting for the Industrial Revolution, the Anthropocene juggernaut of nature transformed to the service of humankind. And that revolution arrived, late in the 19th century, growing so fast in the desert that users in the agrarian states upstream feared the entire river might be appropriated out from under them. The Compact commission resulted, to try to quell those fears enough so the Bureau of Reclamation could build the big mainstem dam that would enable California to grow even faster….

The best the Compact commission could do was the division of the river into the two basins, linked only by the mandate for the Upper River water users to not dry up the Lower River users. This did nothing but formalize that ‘natural’  division created by the canyons – and also some of the problems innate to the cultural division between the industrial revolutionaries and the agrarian counterrevolutionaries (now enjoined with the environmental and recreational groups). The long descent toward breakdown, exacerbated by climate changes we never meant to cause, has culminated in the leaders of the two basins breaking off joint negotiations over the future, and going home to their own two rivers to draft up mandates for each other.

Yet they all appear to be committed to hanging onto the Compact, like a drowning man hangs onto a straw.

Meanwhile, however, the people who were here first in the two river basins, and the canyons too, have cleared their throats, and announced again that they will not be ignored in planning the future of the river. Sixteen of the First People nations have submitted their thoughts on the future of the river to the Commissioner of Reclamation, with a list of considerations they want answers for. We will look at that next post, and maybe muse a little further on how to make one river out of two, or thirty-two. Or should we just go with two or more? Suggested reading: Go to your Trump Bible and read First Kings 3:16-28.

Native America in the Colorado River Basin. Credit: USBR

Where did all the water go? New study explores water use in the #ColoradoRiver basin — Source #NewMexico #COriver #aridification

The Colorado River is pictured near Moab on Sunday, Feb. 18, 2024. (Photo by Spenser Heaps for Utah News Dispatch)

Click the link to read the article on the Source New Mexico website (Kyle Dunphey, Utah News Dispatch):

April 2, 2024

The final 100 miles of the Colorado River is a shell of its former self — nearly 10 miles wide at the turn of the century, steamboats would transport carriages and early-model cars from Mexicali to San Luis in Mexico’s Baja California state. Jaguars, beavers, deer and coyotes roamed the fertile riparian ecosystem and farmers had more water than they knew what to do with.

Now, a weave of concrete canals brings water to sprawling industrial farms situated in the Mexicali Valley, with much of the natural riverbed dry and the wildlife sparse. Tides still drive water from the Gulf of California into the valley a few times a year, but the days of a lush river delta in northern Mexico are long gone.

Satellite view of the Colorado River Delta featuring Isla Montague and the Ciénaga de Santa Clara wetland April 25, 2020. By NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey – https://earthobservatory.nasa.gov/images/146839/green-lagoons-no-more?src=eoa-iotd, Public Domain, https://commons.wikimedia.org/w/index.php?curid=91675468

So, where did all the water go? Researchers on Thursday published one of the more comprehensive analyses of the Colorado River basin attempting to answer the question.

“What we’ve never had is a complete, holistic picture of where all of the Colorado River water goes,” said Brian Richter, president of Sustainable Waters and a lead author of the study.

Richter said that includes an accounting of how all the water in Mexico is used, water that’s exported out of the basin and water from the Gila River, a major tributary of the Colorado River that flows through parts of New Mexico and Arizona.

The answer will likely come as no surprise. According to the study, published in Communications Earth & Environment, irrigated agriculture is responsible for 52% of overall consumption in the basin, and 74% of direct human consumption.

 Of that 52%, crops grown to feed cattle, like alfalfa, account for 32% of all water consumed from the Colorado River.

In the upper basin, which consists of Colorado, Wyoming, Utah and New Mexico, the study found crops grown to feed cattle use 90% of all water diverted toward irrigation — that’s three times the amount of water used for municipal, commercial or industrial use combined.

Richter’s team of researchers calculated the water budget for specific crops by using satellite imagery of agricultural land, then factoring in things like climate and length of growing season to determine consumption.

“If somebody is going to make a statement about how much of the Colorado River goes to irrigated farms, we wanted to make sure they have the right statistics,” Richter said.

The remaining 48% is broken down into three categories in the study — about 18% goes to municipal, commercial or industrial uses, while 11% is lost to evaporation in reservoirs.

Evapotranspiration accounts for the last 19%, which Richter essentially defines as water for the river ecosystem, consumed by riparian and wetland vegetation. It’s a novel approach to a study of this nature, Richter said.

“Usually when people do a water budget for a river system, they’re only paying attention to the human uses. We wanted to change that conversation,” he said.

Consider these other key findings from the study:

In Mexico, 80% of Colorado River water is used for agriculture, while just 7% is left for the river’s ecosystem and 13% for municipal, industrial or commercial use. The river was overconsumed, meaning more water was taken from the river than was supplied during spring runoff, in 16 of 21 years from 2000 to 2020. Users are overconsuming about 20% of the river’s water, the study found. The lower basin uses more water for agriculture than the upper basin — 54% of Colorado River water in the lower basin (Arizona, Nevada, California and Mexico) is used for crops and livestock, compared to 48% in the upper basin. In the upper basin, 24% of Colorado River water is consumed by the ecosystem compared to 14% in the lower basin. About 15% of the water in the upper basin is lost to evaporation in reservoirs — in the lower basin, that figure is at about 10%.

The study comes as water managers from Colorado River basin states are working on new management plans ahead of 2026, when current guidelines are set to expire. Negotiations are tense, and the states so far have yet to reach an agreement. Meanwhile, scientists estimate flows in the river have decreased by roughly 20% over the last century, with warming temperatures resulting in a 10% decrease in runoff.

Richter said he hopes the study can be of use as negotiations continue.

“We wanted to make sure those negotiators have the most accurate and the most complete estimates of where the water is going as a foundation,” he said.

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

Lamenting the McElmo effect and irrigation-landscapes in an era of aridification: On the side-effects of necessary water use cuts — Jonathan P. Thompson (@Land_Desk)

Irrigated landscape in McElmo Canyon in the summertime. Jonathan P. Thompson photo.

Click the link to read the article on The Land Desk website (Jonathan P. Thompson):

March 29, 2024

Last week, on my way from Durango to southeastern Utah to get my sagebrush and slickrock fix, I drove through one of my favorite places anywhere: McElmo Canyon. The evening light, filtered through a series of spring squalls moving across the Great Sage Plain, lent a warm glow to the leafless cottonwoods and the red spikes of willow poking out of winter-dry cattails. The ditchcots — the feral apricot trees that cling to the edges of irrigation canals — were in full bloom. The beige fields were beginning to turn green. And newborn calves bounded clumsily among their slow-moving elder cows. 

I may have screamed something about how beautiful it all was out the open window of my moving car. Yet I was also struck with a sense of melancholy, for I knew that the scene would not last, and that the McElmo Canyon landscape I so cherish will vanish, or at least change radically, in the not-so-distant future.

La Plata Mountains from the Great Sage Plain with historical Montezuma County apple orchard in the foreground.

It’s not climate change that threatens the place — at least not directly. It’s the fact that so much of what is appealing about McElmo Canyon is essentially artificial. It was made possible by large-scale, inefficient irrigation, by diverting water from the Dolores River and transplanting it into laterals and ditches that then flood alfalfa and hay fields — swatches of emerald green that juxtapose delightfully against sandstone cliffs in the heat of summer. Leaky ditches create mini-riparian zones (and ditchcot groves), bountiful with feral asparagus in the spring, where once were only dryland shrubs; flood-irrigation runoff pools into inadvertent wetlands that nurture cottonwoods and cattails, milkweed, willows, and boxelders.

McElmo Canyon this March, with the ditchcots in bloom. Jonathan P. Thompson photo.

This phenomenon isn’t unique. It’s repeated in valleys all over the arid West, where a stark dividing line between irrigated and non-irrigated lands is often evident. The settler-colonial project to harness and tame the West’s rivers and streams has not only allowed crops and cities to grow in places they couldn’t before, but it has also altered much of the landscape so thoroughly that many of us can’t even imagine what these valleys looked like in the days before industrial-scale irrigation. 

“It’s part of our aesthetic as Westerners,” Brian Richter, a water sustainability expert and lead author of a new accounting of the Colorado River’s waters, said. 

Farmer’s Ditch in the North Fork Valley of western Colorado, which nurtures a mini-riparian environment of its own. Jonathan P. Thompson photo.

Richter’s tabulation confirmed and put more exact numbers to what we already knew: The Colorado River system is overtaxed and it’s shrinking. Since the largest user is agricultural irrigation, that’s whence the biggest cuts must come. Those cuts will indirectly affect McElmo Canyon and landscapes like it. 

***

Richter and his colleagues published their first Western water accounting in 2020 under the telling title: “Water Scarcity and Fish Imperilment Driven by Beef Production.”  This spring, Richter and his team released an update of sorts, this time focusing entirely on the Colorado River. It’s the first-ever complete accounting of the system, encompassing water use from the Gila River, a tributary in New Mexico and Arizona, and all the consumptive uses of the Colorado’s water, including reservoir evaporation and riparian and wetland evapotranspiration, as well as out-of-basin exports to places like Denver and the Rio Grande watershed, and water use in Mexico. 

The findings included: 

  • Irrigated agriculture is by far the dominant consumer of Colorado River water, accounting for 52% of overall consumption (which includes reservoir evaporation and riparian and wetland evapotranspiration) and 74% of direct human consumption.
  • Cattle-feed crops (alfalfa and other hay) consume more Colorado River water than any other crop category, accounting for 32% of all water from the basin; 46% of direct water consumption; and 62% of all agricultural water consumed.
  • Cattle-feed crops consume 90% of all the agricultural irrigation water in the Upper Basin — three times more than is consumed by municipal, commercial, and industrial uses combined. 
  • 19% of the water supports the natural environment through riparian and wetland vegetation evapotranspiration along river courses.
Breakdown of where the Colorado River’s water goes. From “New accounting reveals why the Colorado River no longer reaches the sea,” by Brian Richter et al. Summary of the Colorado River Basin’s water supplies (left side) and all water consumed in each sub-basin, in each water use sector, and by individual crops. All estimates based on 2000-2019 averages. MCI = municipal, industrial, and Industrial uses. Credit: Sustainable Waters

The Colorado River’s users collectively consume far more water than exists in the system and if demand is not balanced with supply, we face all kinds of woe. Most folks probably would like to see desert cities — and ostentatiously profligate water-users, such as golf courses and lawns and swimming pools — bear the burden of those cuts. After all, who values golf over food production? 

But as the Land Desk has pointed out numerous times: The math just doesn’t support this solution. The cities and golf courses and even the energy industry, thirsty as they may be, don’t use enough water to make the necessary cuts. The biggest cuts are going to have to come from the biggest users: agriculture, specifically hay, alfalfa, and other forage for beef and dairy cows. “The only dial we have to work with is irrigated farming,” Richter said.

When the dilemma is considered in the abstract, based on a flow chart like the one pictured above, the solution seems straightforward: Cut off the irrigation to those vast swaths of perfect squares and circles of emerald green alfalfa in the southern California and Arizona deserts (and stop eating beef and cheese). It’s simple math. Of course, it’s also severe and would have major economic and cultural ramifications. A friendlier solution is to keep irrigating, but in a more efficient way: Pipe irrigation laterals and canals or line them so they stop leaking; end flood-irrigation to reduce waste (and irrigation runoff); and plant less water-intensive crops. 

But any of these solutions would ripple beyond the canals and fields and into the irrigation-created landscapes many of us have grown to love. McElmo Creek likely would run only after snowmelt and monsoon storms, the leaky-ditch created wetlands would fade away, and many of the willows and cattails and cottonwoods and ditchcots that rely on irrigation runoff would perish. A new, more “natural” landscape would later emerge, but the transition period would be choked with invasive weeds and desiccated riparian vegetation.

It’s more than just the look or feel of the land and vegetation that will be affected when less or no water is delivered to the alfalfa and hay fields of the West. Ecosystems will feel the impacts as well. A program paying farmers to stop irrigating some fields in California’s Imperial Valley, for example, has been delayed because it could adversely affect endangered pupfish that have taken up residence in irrigation drains. 

This is not an exhortation to continue dumping water on alfalfa fields to preserve the ecosystems and aesthetic that have risen up alongside them. It is merely a lament. To save the West’s streams and rivers, sacrifices must be made. That they are necessary doesn’t make them any less heartbreaking.

An irrigated hay field juxtaposed against sandstone in McElmo Canyon. Jonathan P. Thompson photo.
🌵 Public Lands 🌲

You know how we’ve been reporting about new management plans for Grand Staircase-Escalante and Bears Ears National Monuments over the past several months? You may not have noticed, but we have NOT been reporting on management plans for Gold Butte and Basin and Range National Monuments in Nevada. Why? Because the Bureau of Land Management hasn’t formulated them, yet, even though it’s been nearly a decade since they were established. 

Gold Butte National Monument. By US Bureau of Land Management – http://mypubliclands.tumblr.com/, Public Domain, https://commons.wikimedia.org/w/index.php?curid=55713922
Basin and Range National Monument with stunning landscapes, ancient rock art. By U.S. Department of the Interior – 9375, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=45403453

This has set up a sort of nightmare scenario: The areas are receiving national monument-level visitation, but only the usual federal land protections. The result, according to a lawsuit filed by the Center for Biological Diversity recently, is a mess. The lack of toilets or garbage receptacles has led to human waste, toilet paper, and trash scattered around popular sites. Cattle grazing is occurring with little to no management — including by Cliven Bundy’s infamous cows, which continue to graze illegally in Gold Butte — degrading desert tortoise habitat. 

The lawsuit seeks to force the agency to establish management plans for both national monuments 

***

There’s also good news for national monuments: The U.S. Supreme Court has declined to take up the timber industry’s lawsuit seeking to nullify the 2017 expansion of Cascade-Siskiyou National Monument in Oregon. While the case was focused on a specific national monument, it also challenged the authority of presidents to protect places under the Antiquities Act of 1906. 

Three timber advocacy groups sued the federal government shortly after President Obama added 48,000 acres to the existing national monument near the end of his second term. Read more in OPB.

***

Labyrinth Canyon. Copyright Ray Bloxham/SUWA

Along those same lines: A federal court rejected motorized groups’ lawsuit seeking to block the implementation of a new travel management plan for the Labyrinth Rims/Gemini Bridges area northwest of Moab. That will allow the BLM to move forward with the plan, which closes 317 miles of roads and trails to motorized use on about 468 square miles of public land, and leaves 800 miles of routes open to OHVs. 

Read the judge’s decision

Parting shot

A fresh coating of snow covers the West Needles in southwestern Colorado in March. Spring storms have brought the region’s snowpack to “normal” levels after a slow start to winter. Jonathan P. Thompson photo.

Solving Water Crises Begins With Good Data — Brian Richter (Sustainable Waters) #ColoradoRiver #COriver #aridification

Lake Mead, December 2020. Photo credit: Brian Richter

Click the link to read the article on the Sustainable Waters website (Brian Richter):

March 28, 2024

Note: This blog post was originally published in Research Communities by Springer Nature. Media coverage of this story can be found at the following links:

LA Times

Salt Lake Tribune

High Country News

ABC News

Newsweek

NPR

KNAU Arizona Public Radio

Courthouse News Service

Negotiations over future allocations of water from the Colorado River (southwestern US) are contentious, and intensifying. A new study providing comprehensive accounting for all uses of the river’s water can aid design of strategies for bringing use back into balance with available supplies.

The Colorado River in the southwestern US is getting a lot of media attention lately, for good reason. Since 2000, more water has been consumed from the river basin and its reservoirs than melting snows and summer monsoons have been able to replenish. As a result, Lakes Mead and Powell — the two largest reservoirs in the US — are now three-quarters empty, the river no longer reaches the Gulf of California in Mexico,  and persistent water shortages threaten the security of cities, farms, electricity generation, recreation, and ecological health.

As I’ve long advised my university students and fellow water professionals, any efforts to resolve a water crisis must be founded on  accurate and complete data characterizing available water supplies and uses. Detailed knowledge of how and where a river’s water is being used can aid design of strategies and plans for bringing water use back into balance with available supplies, while ensuring that sufficient water remains in freshwater ecosystems to sustain their health. Yet despite the Colorado River’s importance to more than 40 million people and more than two million hectares (>5 million acres) of cropland,  a full sectoral and crop-specific accounting of where all of the river’s water goes en route to its delta has never been attempted, until now.

The seven ‘accounting units’ used in this study are displayed here. Credit: Sustainable Waters

We have just published a complete water budget for the Colorado River in Communications Earth & Environment. Ironically, our motivation for compiling this water budget  emerged from our frustrations over the manner in which our previously published research was being regularly miscommunicated in the media! In 2020, we  published a paper in Nature Sustainability that included a partial water budget for the Colorado River. That study did not attempt to account for the 12% of the river’s water that is exported outside of the basin’s physical boundary, nor did it account for the substantial volume of water (30%) that either evaporates from reservoirs or is evapotranspired from riparian and wetland vegetation. However, many media reporters overlooked the fact that our water budget did not account for all water consumed from the river basin, and media statements based on our research began suggesting that “Nearly 80% of the Colorado River’s water goes to irrigated agriculture,” which is not accurate, and is misleading. As our new study reports, when accounting for ALL water consumed from the river,  the proportion of river water going to farms amounts to just over 50%. [ed. emphasis mine]

Water consumption by sector in the Colorado River Basin and sub-basins (including exports), based on 2000-2019 averages. Credit: Sustainable Waters

These differences in water accounting matter greatly in a river basin with so much at stake. The region has been experiencing a ‘megadrought’ since 2000 that has reduced river flows by  20%. Climate scientists assert that this is a bellwether of long-term, climate-driven aridification in the region. It is of critical importance that the state and federal negotiators presently debating future water allocations are being informed with an accurate tabulation of where all of the river’s water goes presently. Such accounting is essential in designing strategies for rebalancing water consumption with available supplies.

Our water budget details how and where the water is being consumed, including estimates of the volume of water being consumed by individual crops in different areas of the river basin. This level of detail can help water managers understand how much water might be saved by shifting to alternative crops, or by repurposing some portion of farmlands for habitat restoration or renewable energy generation. It is also important to understand trends in water use; our data indicate that during 2000-2019, combined urban and agricultural water use in the Upper Basin increased by 5% while these uses decreased in the Lower Basin by 24%.

An accurate tabulation of a water budget can also be useful to media reporters in formulating comparisons among water-use categories that can capture reader attention, educating them in the process. For instance, our study found that water consumed in irrigated agriculture is three times greater than the volume used in cities, and in fact, the irrigation of just two crops — alfalfa and grass hay fed to cows for beef and dairy production — consumes as much water as all of the cities using Colorado River water.

Another important achievement of our study was our estimation of the volume of water being consumed by riparian and wetland vegetation through evapotranspiration.  Over recent decades, this volume has been reduced considerably because of the drying of the river’s delta in Mexico, which wiped out a vast and highly productive wetland along with the native tribe of Cucupa that depended on the delta’s natural bounty.  If human uses of the river’s water are not substantially reduced, and climate warming continues to reduce the river’s natural flow, more losses of riparian and wetland vegetation — and greater imperilment of native species — can be expected.

Summary of the Colorado River Basin’s water supplies (left side) and all water consumed in each sub-basin, in each water use sector, and by individual crops. All estimates based on 2000-2019 averages. MCI = municipal, industrial, and Industrial uses. Credit: Sustainable Waters

Steering committee IDs three ways forward for #CrystalRiver protection: Subcommittees formed on IGAs, peak instream flow and federal designation — @AspenJournalism #RoaringForkRiver #ColoradoRiver #COriver #aridification

The Crystal River flows through the Gunnison County town of Marble, seen here with Beaver Lake. A representative from the Town of Marble is expected to participate in a subcommittee focused on an intergovernmental agreement to protect the river. CREDIT: ECOFLIGHT

Click the link to read the artilcle on the Aspen Journalism website (Heather Sackett):

March 28, 2024

After a year’s worth of work and meetings with a facilitator, a group focused on protecting the Crystal River is pursuing three potential ways forward.

The Crystal River Wild & Scenic and Other Alternatives Feasibility Collaborative Steering Committee recommends forming three subcommittees, each focused on continuing to evaluate a different method of river protection.

The first is an intergovernmental subcommittee composed of local governments that would develop an agreement that commits each of them to protecting the mainstem of the river against dams and trans-basin diversions. A “peaking” instream-flow subcommittee would look at protecting river flows during times of peak runoff and against diversions. A third subcommittee would move forward with writing a draft proposal for a federal Wild & Scenic designation that has the flexibility to address local landowner needs and that supporters say is still the strongest option for river protection.

Some Crystal Valley residents, along with Pitkin County, have pushed for a Wild & Scenic designation for years to protect the free-flowing nature of the river. But others, wary of any federal involvement, have balked at the idea, instead proposing different types of protections.

The steering committee was convened last year to explore different options, including Wild & Scenic, for river protections. As part of this work, they also held two community summits, which each drew more than 120 members of the public, as part of a process to get stakeholder input.

Marble resident Wendy Boland will be on the Wild & Scenic subcommittee. She said that the majority of residents are in favor of a federal designation, but that the subcommittee will have to address some people’s lingering concerns about private property and make sure those concerns are respected.

“Wild & Scenic is constantly being called the gold standard of river protection,” Boland said. “And the fact that it can be tailored to meet a local community’s needs and concerns is a big plus. So that’s really the goal of the subcommittee I’m on. We’ve listened to everybody’s concerns; can we draft legislation that would meet all those concerns?”

Map of the Roaring Fork River drainage basin in western Colorado, USA. Made using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69290878

The Crystal flows from its headwaters in the Maroon Bells-Snowmass Wilderness through the towns of Marble, Redstone and Carbondale before its confluence with the Roaring Fork and is one Colorado’s last undammed major rivers.

The U.S. Forest Service determined in the 1980s that portions of the Crystal River were eligible for designation under the Wild & Scenic River Act, which seeks to preserve, in a free-flowing condition, rivers with outstandingly remarkable scenic, recreational, geologic, fish and wildlife, historic, and cultural values. Wild & Scenic experts say the “teeth” of the designation comes from an outright prohibition on federal funding or licensing of any new Federal Energy Regulatory Commission-permitted dam. A designation would also require review of federally assisted water resource projects.

Any designation would take place upstream from the big agricultural diversions on the lower portion of the river near Carbondale.

Jennifer Back, a retired National Park Service employee and former member of the Interagency Wild and Scenic Rivers Coordinating Council talks with Crystal River valley resident Larry Darien at a community summit on the Crystal River in April 2023. Three subcommittees will move forward with exploring options for protecting the river. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

‘Peaking’ instream flows

A second subcommittee will look at a tool that could be used to protect peak flows through the Colorado Water Conservation Board’s instream-flow program. The CWCB is the only entity allowed to hold water rights that keep water in rivers and are designed to preserve the natural environment to a reasonable degree. A “peaking” instream-flow water right would keep in the stream all of the water not claimed by someone else (also called “all of the unappropriated flow”) during certain times of the year.

So far, this particular tool is little-used, but there are three recent examples in the Gunnison River basin on Cottonwood CreekMonitor Creek and Potter Creek. These three water rights were filed for in July and are still making their way through water court. No entities have filed statements of opposition. All three still allow for some amount of future water development.

The way that instream-flow water rights work is that another entity, usually a land use agency such as the U.S. Bureau of Land Management or a wildlife agency such as Colorado Parks and Wildlife will make a recommendation to the CWCB for a particular amount on a particular stream. Roy Smith, a water rights and Wild & Scenic Rivers specialist at the BLM, worked on the recent peaking instream-flow water rights in the Gunnison basin. He said in those cases, a peak instream flow was needed to protect the cottonwood trees because they need high flood waters that slowly recede to germinate seeds.

“Basically, what it means is every drop of water that has not been spoken for by any previously claimed water right is spoken for by this instream flow,” Smith said. “What we decided was let’s propose a water right where when the stream reaches bank full, a water right will be triggered that protects all the flow from that flow rate and above until the flood event is over.”

But the “outstandingly remarkable values” that Wild & Scenic seeks to protect and the special riparian ecosystems that peak instream flows are designed to protect may not align in the case of the Crystal River.

“A lot of the values that the Forest Service identified for potential Wild & Scenic designation are values like recreation and scenic and those are little bit harder to fit into the state’s instream flow program because that focuses on water-dependent ecology like bugs and fish and riparian habitat,” Smith said. “So there’s still a question as to whether those values on the Crystal can fit into this type of approach. The stakeholder group is going to have to figure that out.”

The intergovernmental agreement subcommittee will focus on developing a draft agreement to memorialize a commitment to protecting the Crystal against mainstem dams and trans-basin diversions. It will include representatives from the town of Marble, Gunnison County, Pitkin County and the Colorado River Water Conservation District. The River District is no stranger to water sharing agreements and has helped craft some of the most important ones in Colorado between Front Range and Western Slope water users.

Zane Kessler, the River District director of government relations, was a member of the steering committee and will serve on the intergovernmental agreement subcommittee. He said he was glad the group could find consensus on pursuing the three potential options for river protection.

“I think this should serve as an example of how local, county and regional governments on the Western Slope can work together to represent and protect the water interests of our shared constituents,” he said in a statement. “But the path forward is going to have to include communication and collaboration. It can’t be just one town, or county or district going it alone.”

Each of the three ways forward do not preclude any of the others being considered. The three subcommittees plan to provide monthly updates, and the entire steering committee will continue to meet every six months for the foreseeable future.

“Everybody loves the river, and they want to protect it,” Boland said. “The question is: Which ways can we make that best happen?”

Pitkin County supports Aspen Journalism with a grant from the Healthy Community Fund. Aspen Journalism is solely responsible for its editorial content.

Interview — Rapid Decline: Brad Udall describes impacts of #ClimateChange on the #ColoradoRiver and its 40 million users — #Colorado State University #COriver #aridification

Brad Udall is pictured at Boulder Reservoir, which helps deliver water from the Upper Colorado River to the Front Range. Photo: Vance Jacobs

Click the link to read the article on the Colorado State University website (Coleman Cornelius):

February 13, 2024

MOST PEOPLE KNOW EXACTLY where they get their water, says Brad Udall, an eminent water and climate scientist at Colorado State University.

It comes from the tap.

But, of course, the real source of our water is far more complicated. And not everyone on Colorado’s populous Front Range knows that about half the water we use for households, industry, and agriculture comes from the Colorado River Basin.

The basin begins with headwaters along the Continental Divide in Northern Colorado – think Rocky Mountain National Park. Made up of the Colorado River and its tributaries, the basin stretches across Colorado’s Western Slope, into six other Western states, and on to a portion of Mexico. It provides water for 40 million people and 5.5 million irrigated farm acres in the United States and Mexico. That includes 30 Native tribes. While several million of these thirsty folks live in Metro Denver and municipalities to the north and south, many more live in the West’s biggest cities, including Las Vegas, Los Angeles, and Phoenix.

On top of this relentless demand, the Colorado River Basin is mired in a supply crisis that is growing increasingly urgent: The region has endured serious drought for 23 years – fueled by human-caused climate change. In short, plummeting supplies, a booming population, and escalating management conflicts have combined to put the Colorado River Basin on the hot seat, with serious ramifications for Colorado and surrounding states.

Detailed Colorado River Basin map via the U.S. Bureau of Reclamation.

The basin’s climate dynamics and management issues are the focus of Udall’s work as the senior water and climate research scientist with CSU’s Colorado Water Center. His research has become increasingly prominent as flows in the Colorado River Basin have declined and water levels in lakes Powell and Mead – the nation’s largest reservoirs and the most important in the basin – have reached critical lows during a prolonged drought.

Udall seems destined for his work: As he was growing up, his uncle, Stewart Udall, was secretary of the U.S. Department of the Interior, while his father, Mo Udall, was a congressman representing Arizona. The brothers helped develop and promote the Central Arizona Project, a vital part of the basin’s water infrastructure. Udall floated the Colorado River for the first time as a teenager and, while in college, worked as a river guide in the Grand Canyon.

In 2022, Udall delivered a number of talks coinciding with the 100th anniversary of the Colorado River Compact, the problematic framework for managing delivery of river water. The compact – in theory – apportions 7.5 million acre feet of Colorado River water per year to both the Upper and Lower basins. But the actual usage is decidedly lopsided, with the Lower Basin using more than two times that of the Upper Basin. And delivery as described in the compact is quickly becoming impossible with drought and climate change bearing down. Udall estimates that Colorado River flows have dropped by about 20 percent overall since 2000, with further declines projected due to warming and drying.

UDALL RECENTLY DISCUSSED THE ISSUES WITH STATE MAGAZINE.

Q. In Colorado, our population is nearing 6 million people, with roughly 85 percent living on the Front Range. Thanks to transmountain diversions, about half of our water here on the Front Range comes from the Colorado River Basin. Do you think people realize that? 

A. They have no idea, for the most part, where their water comes from. They’re going to learn over time as these water crises become more front and center.

The Grizzly Creek Fire burning along the Colorado River on August 14, 2020. By White River National ForestU.S. Forest Service – https://www.facebook.com/GrizzlyCreekFireCO/posts/128313015469678, Public Domain, https://commons.wikimedia.org/w/index.php?curid=93777078

Q. What do climate dynamics in the Colorado River Basin mean for our state and its population, particularly on the Front Range, where we see so much growth? 

A. For a long time, scientists have thought Colorado River flows would decline as it warmed, and we now have proof this is happening. There are two components to this.

One is more evaporation as it warms. You have a longer growing season, it’s warmer on any given day, snow melts off earlier, and less water is left to flow into rivers and creeks because the atmosphere wants more of it. The atmosphere actually holds more moisture as it warms; there’s this bigger sponge to suck it up.

The other reason is that we’re actually going to see less precipitation in the American Southwest – and the farther south you go, the bigger the decline. That has huge implications for this state.

Of these two mechanisms, what worries me most is declining precipitation because that’s the traditional cause of drought. In the basin, we’ve measured a 23-year running precipitation average that is the lowest in recorded history. So this decline in precipitation is quite, quite worrisome.

Warming, of course, is also an issue because we think we lose somewhere between 5 percent and 10 percent of the flow of the Colorado River through enhanced evaporation for each degree Celsius of warming, or nearly 2 degrees Fahrenheit. In the Upper Basin, it’s about 3 degrees Fahrenheit warmer than it was in the 1970s, and unfortunately, the basin will continue to warm because of human-caused greenhouse gas emissions.

Q. We’re talking about the overall effects of major drought, but 2023 was a remarkably wet year for parts of the basin. In fact, lakes Powell and Mead now sit at between 30 percent to 40 percent full – an improvement of about 10 percent from their lows in 2022. How do the precipitation and snowpack of 2023 affect the outlook?

A. While 2023 was good, it wasn’t lifesaving, and it wasn’t unprecedented – 2011 had higher river flows. It has bought us some time for difficult conservation planning and agreements, but it does not fundamentally change conditions in the basin – long-term drought remains the problem. Even with these big precipitation years, we are getting less water than we would have in the 20th century because of the drying effects of climate change.

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

Q. Many people have referred to the 23-year drought in the Colorado River Basin as a megadrought because of the length of time it has dragged on. You have referred to it as aridification. What does that mean, and how does aridification differ from drought? 

A. The symptoms of aridification include long-term warming and drying in large parts of North America, especially in the Southwest, but not exclusively. Not every year is warmer, not every year is drier, but that’s the trend, and it’s going to further reduce flows in the Colorado River through time.

This warming and drying trend causes earlier snowpack runoff, more rain, and less snow. The atmosphere wants to hold more moisture. We have reductions in river flows, drier soils, forest mortality, and more severe wildfires. There’s a whole series of these things that occur as it aridifies. None of them is good.

Droughts are temporary, while aridification is not. Aridification puts us on a path to a very different climate that will continue until we stop greenhouse gas emissions.

Q. Before the precipitation of 2023, historic lows were seen in Lake Powell and Lake Mead. That has triggered water use cutbacks in the Colorado River Basin, intense conservation planning, and alarming scenarios for water availability and hydroelectric power availability. How did these huge reservoirs get so dangerously low? 

A. We’ve blundered our way into it because we just never had the conception or were unable to believe that these flows could decline permanently. As was often said of 9/11, we had a failure of imagination. Here we have something similar: failure to accept the science. People naturally want to think it’ll get better, and, unfortunately, after 23 years, anybody who thinks it’s going to get better needs to rethink that. [ed. emphasis mine]

Lakes Powell and Mead have buffered us through imbalances over the last 23 years by releasing more water than flowed in. But the reservoirs are now less than 30 percent full – so low that the game is up very soon. Jim Lochhead, the recently retired CEO of Denver Water, had a great line at a recent symposium. He said, “We’re looking at a bank account that is at zero balance, with no line of credit.” We’ve had a line of credit with the reservoirs for decades, but that’s nearing an end.

Receding waters at Lone Rock in Lake Powell illustrate the impacts of megadrought. Hydroelectric generation will be endangered if the lake continues to shrink. Credit: Colorado State University

Q. What is Colorado’s role in the crisis in the basin and in solutions? 

A. We’re the largest user of Colorado River water in the Upper Basin states. We clearly need to conserve and use less water. Some of that is going to come out of our cities, and some of it’s going to come out of the agricultural sector because agriculture in the American West, including in Colorado, uses somewhere between 70 percent and 80 percent of water. Because of its size, more pain is going to be felt by ag; there’s just no way around that. But the cities will also need to step up, for sure.

Q. Water managers often discuss the differences in Upper Basin and Lower Basin use and responsibilities in cutbacks. In a nutshell, what are the issues at play between Upper and Lower? 

A. This is a huge question. Until very recently, the Lower Basin was using 10 million acre feet of Colorado River water per year, and the Upper Basin is using about 4½ million. Despite recent Lower Basin cutbacks of about 1 million acre feet, they are still using too much water. If you use more water, you’re going to have to contribute more to solve this problem, so much of the focus is on the Lower Basin to provide solutions. And what we’re seeing is infighting in the Lower Basin about how to get cuts in place.

NASA satellite images show water decline in Lake Mead from 2000, at left, to 2022. The largest reservoir in the United States is now at less than 30 percent capacity. Meantime, as of early February, the seven states that depend on the Colorado River had failed to unanimously agree on water-usage cutbacks to save dwindling supplies; negotiations continue among the states and federal officials. Credit: Colorado State University

Q. The Colorado River Compact turned 100 years old in 2022. What role does the compact have in state responses to historic lows in the basin? 

A. Western water law is in a period of tremendous upheaval to a new, and still very much uncertain, system. The old system was based on priority: first in time, first in right. It made sense for miners and farmers in an earlier time. It doesn’t make much sense in the 21st century because if you’re a city and you’re a junior user, you run the risk of being completely cut off. You can’t just completely cut off a city. But we spent 100 years planning around this system of prior appropriation and seniority. We’re finding there are issues we haven’t accounted for, such as protecting the reliability of infrastructure and safeguarding human health and safety that must take precedence over strict priority.

Q. It’s also interesting that the Colorado River Compact was drafted during peak water years, so people had a very unrealistic sense of what might be available in the future. 

A. I hate to say this, but the history of water allocation and water projects in the American West has been defined by too much optimism, too much boosterism, too much, “Rain follows the plow.”

Water managers fear Lake Mead could plummet to “dead pool,” below the level needed to generate hydroelectricity at Hoover Dam and to deliver water to Nevada, Arizona, and California. Receding water has already forced extension or closure of many boat launch ramps. Credit: Colorado State Univesity

Q. You recently coauthored a policy paper in the journal Science addressing what it will take to stabilize use of Colorado River water now that the effects of climate change are clear. What were some of your key recommendations – and are they achievable? 

A. The saying, “Nature bats last” is a good one to keep in mind because nature is going to balance the books if we don’t. What we said in the paper is there are a variety of ways in which we could reach a balance. We set forth combinations of reductions in Lower Basin water use, plus caps on Upper Basin water use, so each side gets a penalty. These solutions will impose significant pain, but more on the Lower Basin.

Lake Mead key elevations. Credit: USBR
Lake Powell key elevations. Credit: USBR

Q. What happens without significant management changes? 

A. The worry is that we reach dead pool in lakes Powell and Mead – when levels drop so low that water can’t flow downstream from the dam. That would mean no hydropower out of Lake Powell and, potentially, no hydropower out of Mead. It also means, more importantly, stranded water in both of these reservoirs, so we can’t get it to Lower Basin users. It’s completely untenable, and we can’t allow ourselves to go there.

Q. You and others have noted that the public, as a whole, doesn’t seem to fully hear or respond to messages about climate change and these drastically dropping water supplies in the basin. How might climate scientists more successfully communicate facts to the public? 

A. Nowadays, there are lots of teachable moments when it comes to climate change. It’s being able to connect the dots between floods, drought, wildfires, and things like low flows in the Colorado River Basin. I think many people get climate change. The problem is the next step: What do we do about it? In the case of water, it means cutting back – pursuing conservation and efficiency with every tool we have.

It also means keeping our eye on the big problem here, which is solving the climate crisis. Climate change is water change. If we keep heating the planet like we’re doing, we’re going to continue to change the water cycle in fundamental ways. So we need to get to net-zero greenhouse gas emissions as soon as we possibly can. Everybody – and I include water providers – needs to be shouting from the rooftops, “Hey, politicians, we’ve got a problem here. Help us solve it.” [ed. emphasis mine]

Extensive farmland receives irrigation water and 80 percent of the Arizona population receives municipal water through the Central Arizona Project, a massive distribution system in the state that Brad Udall’s father and uncle worked to establish. Accelerating evaporation in diversion systems such as this is a top concern resulting from climate change. Credit: Colorado State University

Q. You mentioned that, in the West, around 80 percent of our water supplies are used by agriculture to grow our food and fiber and other essential products. How is the agricultural industry participating in basin discussions? And what are some of the key ways that agriculture is pitching in?

A. I would argue the dialogue in this state is better than anywhere. The farming community is actively engaged. Nobody wants solutions imposed upon them, so I think we need to look to ag to have them tell us how to solve this. I think some permanent demand reduction is going to have to happen. It’s going to be painful, and we’re going to have to figure out ways to minimize the damage. Efficiency in agricultural water use is certainly in play, but we need to make sure it’s done effectively.

Q. Regarding municipal use, we know a majority of our household water typically goes to lawn irrigation. Do you think cash-for-grass programs, which provide incentives for homeowners to replace lawns with xeriscaping, can be effective conservation tools?

A. I think it can be. It’s a lot of work because you’ve got to replace lawns with native and low-water plantings. And you can’t let a developer come in and put in new bluegrass after you’ve ripped it out somewhere else. Another issue is that you don’t want to lose trees and tree cover, which make spaces cooler and more livable – and often rely on water used to irrigate lawns. But these programs have made a difference in places like Los Angeles and Las Vegas. Jim Lochhead has this great saying – “If grass only sees a lawnmower, it needs to go away.” Meaning, purely ornamental lawns are not sustainable.

Left: Los Angeles and the Imperial Valley, an important agricultural region south of the city, rely heavily on Colorado River water and make California the largest user of seven states in the basin. Right: The Imperial Dam and Reservoir on the California-Arizona border diverts river water to irrigate California’s Imperial Valley, the most productive winter agricultural region in the United States. Among other benefits, valley agriculture supplies consumers with fresh produce in the winter. Credit: Colorado State University

Q. Given the dire water picture in the Colorado River Basin – the Colorado River doesn’t even reach the Gulf of California anymore – what motivates you to work on climate science in this region? It can be a doomsday scenario. 

A. A lot of climate scientists are more than a little depressed because they’ve been shouting for years about the need to do something, and very little has gone on. For me, I sort of revel in telling people stuff they don’t want to hear. I call myself the skunk in the room. But I think humans can demonstrate their best capabilities when their backs are up against a wall, even if it takes them a while to fully figure out they need to fight and not be passive. People in the Colorado River Basin have solved a bunch of really hard problems, and we realize we’re in this together.

Here’s how much #LakePowell is expected to rise this year — KSL.com #ColoradoRiver #COriver #aridification

Enigmatic artwork with Glen Canyon Dam in the background. Jonathan P. Thompson photo.

Click the link to read the article on the KSL.com website (Carter Williams, KSL.com). Here’s an excerpt:

March 20, 2024

Lake Powell is projected to receive about 5.4 million acre-feet of water based on conditions this winter, National Weather Service’s Colorado Basin River Forecast Center officials said on Friday. That would hoist the reservoir from 32% to 37% capacity after the snowmelt process wraps up in the early summer. The reservoir gained about 65 feet in water levels last spring, jumping from 21% to 38% capacity following last year’s record snowpack. If this year’s projections come to fruition, it would also be close to the reservoir peak in 2021. It would also be much lower than the 2010s average peak…

Graphic credit: Colorado Basin River Forecast Center

The center’s projections are based on a possible inflow of 85% of normal. Snowpack levels are generally between 85% and 130% of normal across the Upper Colorado River Basin region, and 120% and 125% across the Great Basin, Colorado Basin River Forecast Center officials wrote in a water supply report Tuesday. Officials clarified on social media the lower inflows are tied to drier conditions within the Green River and San Juan river basins, which flow into the Colorado River upstream of Lake Powell. They also said inflows were nearly twice the normal last year, which is why the reservoir gained so much in a short period.

Westwide SNOTEL basin-filled map March 23, 2024 via the NRCS.

Aspinall Unit operations update: 550 cfs through the Gunnison Tunnel

Grand opening of the Gunnison Tunnel in Colorado 1909. Photo credit USBR.

From email from Reclamation (Erik Knight):

Gunnison Tunnel diversions will be increasing by 150 cfs on Monday, March 25. This will increase the total diversion from 400 cfs to 550 cfs. For this change in diversion, releases from the Aspinall Unit will remain constant at 1150 cfs. This will result in a drop in river flows of about 150 cfs downstream of the Tunnel

Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows are expected to remain above the baseflow target after this increase in Tunnel diversions.

Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow target in the lower Gunnison River, as measured at the Whitewater gage, will be 1050 cfs for March through May.

Currently, Gunnison Tunnel diversions are 400 cfs and flows in the Gunnison River through the Black Canyon are around 670 cfs. After this release change Gunnison Tunnel diversions will be 550 cfs and flows in the Gunnison River through the Black Canyon will be near 520 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

This scheduled release change is subject to changes in river flows and weather conditions. For questions or concerns regarding these operations contact:

Erik Knight at (970) 248-0629, e-mail eknight@usbr.gov

As states butt heads over #ColoradoRiver plans, water experts gauge impacts to #Colorado — Fresh Water News #COriver #aridification

From left, J.B. Hamby, chair of the Colorado River Board of California, Tom Buschatzke, Arizona Department of Water Resources; Becky Mitchell, Colorado representative to the Upper Colorado River Commission. Hamby and Buschatzke acknowledged during this panel at the Colorado River Water Users Association annual conference that the lower basin must own the structural deficit, something the upper basin has been pushing for for years. CREDIT: TOM YULSMAN/WATER DESK, UNIVERSITY OF COLORADO, BOULDER

Click the link to read the article on the Fresh Water News website (Shannon Mullane):

March 13, 2024

Colorado’s water and reservoirs are in the thick of disagreements over Colorado River management in a drier future.

All seven Western states in the Colorado River Basin agree that climate change is exacerbating conditions in the basin, and water users need sustainable, predictable water management. They agree that the current rules, which expire in 2026, didn’t do enough to keep reservoirs from dropping to critically low levels. They even agree that water cuts need to happen.

But they’re at loggerheads over how to share the pain — and have been for years. Now, the Lower Basin officials have proposed a plan calling on all basin users, including Coloradans, to make sacrifices.

“This is not a problem that is caused by one sector, by one state, by one basin. It is a basinwide problem, and it requires a basinwide solution,” John Entsminger, Nevada’s top negotiator, said during a news conference March 6.

Basin officials are negotiating Colorado River management in order to create new interstate water sharing rules that will replace the current agreements, which were created in 2007. The overburdened river system provides water to seven Western states, two Mexican states and 30 Native American tribes.

Basin states released competing proposals March 6, outlining their ideas for releasing, storing and cutting back on water use.

The Upper Basin proposal — put forward by Colorado, New Mexico, Utah and Wyoming — only includes cuts to the Lower Basin’s water use, although the four states would continue developing voluntary conservation programs.

The Lower Basin alternative — from Arizona, California and Nevada — looks at the amount of water stored in seven federal reservoirs. When that storage falls below 38% of total reservoir capacity, all seven states would conserve water to cut their collective use by 3.9 million acre-feet. One acre-foot roughly equals the annual water use of two to three households.

That’s a no-go for Upper Basin states, where water supply fluctuates yearly because it primarily relies on mountain snowpack. In 2020, a particularly dry year, the Upper Basin used 4.5 million acre-feet — much less than its legal allotment of 7.5 million acre-feet. In 2021, another drought year, the states had to cut back further.

That’s without any additional water cuts, like those proposed by the Lower Basin.

“When we’re looking at those years, like 2021 when our uses in the Upper Basin were at 3.5 million acre-feet, that represents almost a 25% cut,” Commissioner Becky Mitchell, Colorado’s top negotiator, said. “To cut further in a year like that could wreck communities and economies.”

Colorado’s role in the Upper Basin plan

The Upper Basin proposal calls for few changes in the upstream states.

The Upper Basin would keep taking steps to ensure Lake Powell, located on the Utah-Arizona border, could make its required releases downstream, and to reduce Upper Basin water use through voluntary, temporary and compensated cuts, like the system conservation pilot program.

The rest of the proposal is meant to offer guidance to the Lower Basin, Mitchell said.

In the past, officials have changed how water is stored and released at lakes Mead and Powell based on the reservoirs’ elevations. The Upper Basin plan links operations more closely to each year’s available water storage, a high priority for Colorado officials.

In years when Lake Powell is less than 20% full, the Upper Basin states suggested releasing as little as 6 million acre-feet of water downstream. Upper Basin states are legally obligated to let at least 7.5 million acre-feet flow to Lower Basin states (plus some for Mexico) annually, as averaged over a rolling 10-year period.

If reservoir storage dropped to certain trigger levels, Lower Basin states would also cut up to 3.9 million acre-feet in a year.

The approach is designed to replenish depleted water storage in reservoirs, like Mead and Powell. These two enormous reservoirs — which function like savings banks for water users — drained to a third of their volume in the early 2020s, prompting a crisis response among officials and ramping up concerns about water availability in the future.

It would also protect Lake Powell’s ability to release water downstream according to water law, Mitchell said.

“That protects Colorado users. That protects all the Upper Basin states’ users,” Mitchell said. “The rebuilt storage protects all 40 million people — that’s the way that we protect all 40 million is to have a safety net.”

A call for widespread cuts

The Lower Basin officials say that the entire Colorado River Basin — including Colorado and the other Upper Basin states — must cut water use.

In their proposal, Lower Basin officials said they would take responsibility for the structural deficit, which refers to water losses from factors like evaporation, by cutting back on their water use by 1.5 million acre-feet in some years.

Credit: Upper Colorado River Commisstion

In years when the total storage in the system drops below 38%, the Lower Basin says the Upper Basin states need to help out so the basin as a whole can cut 3.9 million acre-feet.

If this plan had been in place since 1971, the states would have started taking cuts around 2000. For most of the past 24 years, the Lower Basin would have taken annual cuts of 1.5 million acre-feet. The Upper Basin would only have faced shortages in 2020 and 2021, according to Lower Basin officials.

“It’s very easy to craft an alternative that doesn’t require any sacrifice, but that’s not what the Lower Basin alternative does,” said JB Hamby, California’s top negotiator, during a March 6 news conference. “The Lower Basin is home to three-quarters of the Colorado River Basin’s population, most of the basin’s tribes, and the most productive farmland in the country. Our proposal requires adaptation and sacrifice by water users across the region.”

What would the Lower Basin option mean for Colorado?

Officials have released written plans, but it will take modeling out many different water supply scenarios to understand the impacts of each proposal, according to water experts.

But under the Lower Basin plan, Colorado could be on the hook for cutting its use by hundreds of thousands of acre-feet, said Colorado water expert Eric Kuhn.

In one hypothetical low-storage scenario, the Lower Basin would cut its use by 1.5 million acre-feet, then the two basins would each conserve an additional 1.2 million acre-feet, Kuhn said.

If Colorado took on a third of the Upper Basin’s obligation — and this is a big “if” — it would mean cutting water use by nearly 400,000 acre-feet.

“If Colorado ever agreed to absorb a certain percentage of the final … cuts, it’ll have a big impact on the state,” Kuhn said. “It’s not theoretical; it would be quite significant.”

For reference, all of the cities, towns and industries in Colorado use a combined total of about 380,000 acre-feet per year from multiple water sources, including the Colorado River, according to the 2023 Colorado Water Plan.

Mandated cuts could even send states into litigation, which is the worst outcome, said one Colorado official. Once the issue moves to the courts, state officials can’t talk to each other, and their future could be in the hands of U.S. Supreme Court justices who may not have expertise in the complex realm of Western water law.

“We’ll talk 1-to-1 cuts when they’re down to 4.5 million acre-feet,” said Steve Wolff, general manager of the Durango-based Southwestern Water Conservation District, referring to the average amount of water used by Upper Basin states. “When you’re still using twice as much as us, why should we agree to a 1-to-1 cut?”

Peter Ortego, general counsel for the Ute Mountain Ute Indian Tribe, said basin tribes that have made agreements to share in future shortages could be impacted. Most tribal nations have senior water rights, which get water first in dry years and should be protected from most water cuts, he said.

Environmental groups say more needs to be done to protect rivers and freshwater resources, which provide vital habitat for wildlife in the arid West.

In recent, very dry years, Colorado trout fisheries, like the Yampa River, have been shut down because of low flows and warmer water temperatures in mid-to-late summer. If modeling shows that federal or state plans would leave less water in the rivers, that would be concerning, said Jennifer Pitt, Colorado River Program director for the National Audubon Society.

Going forward, Pitt and other water experts will be watching for updates from the Bureau of Reclamation’s analysis. That’s when they’ll know more about possible impacts to Colorado.

Until then, Coloradans need to keep one thing in mind, Pitt said.

“This is not Colorado against the rest of the West. This is Colorado, part of a river basin that is shared,” she said. “All those parties need each other to get through some challenging conditions in the future.”

Map credit: AGU

Upper Gunnison River Water Conservancy District forms collective to cover expensive snow survey flights — The Gunnison Country Times #GunnisonRiver #ColoradoRiver #COriver #aridification

Gunnison River in Colorado. Source: Bureau of Reclamation via the Water Education Foundation

Click the link to read the article on the Gunnison Country Times website (Bella Biondi). Here’s an excerpt:

March 13, 2024

Although the Upper Gunnison has proven the value of ASO flights, the agency — as well as many other water districts in Colorado — cannot pay for the costly technology alone. This year, the district created an Upper Gunnison Basin ASO funding partnership, a growing collective of local agencies that will divide the cost of running flights. 

Link to the Colorado Airborne Snow Measurement Program website

“For the Western Slope, it’s incredibly important to be able to predict annual hydrology so that we can live within our means on the river,” said District General Manager Sonja Chavez. 

The annual cost of conducting snow surveys for the East and the Taylor River watersheds exceeds $300,000. These basins, which encompass roughly 570 square miles, are prioritized because they typically hold the most snow and generate the largest amount of water in the spring…After a $50,000 investment from the water district, the Gunnison County Electric Association, the Lawrence Berkeley National Laboratory, the Upper Colorado River Commission and the Colorado Water Conservation Board (CWCB) helped cover the rest. Chavez said she plans to expand the partnership next winter.

Scientists and water managers are keeping their eyes on a “nasty” layer of dust deposited in the #RoaringForkRiver watershed’s #snowpack during two windstorms in late February and early March — The #Aspen Daily News #ColoradoRiver #COriver #aridification 

Albedo effect

Click the link to read the article on The Aspen Daily News website (Austin Corona). Here’s an excerpt:

March 15, 2024

The storms (Feb. 26-27 and Mar. 2-3) were western Colorado’s first major dust event this year. Windstorms carrying dust from the arid Four Corners region commonly hit the Colorado Rockies in spring, depositing dark layers in the local snowpack. The dust often causes snow to melt faster, meaning there is less water available in local rivers and streams by late summer and fall. Rafting companies and recreators have less time to play, and some farmers and ranchers must stop irrigating earlier. Snow researchers say the combined event was relatively large and may have hit the Roaring Fork watershed harder than other areas. The dust has been visible on Aspen ski mountains, including at the bottom of this year’s FIS Alpine World Cup course on Ajax…

Jeff Derry — executive director of the Silverton-based Center for Snow and Avalanche Studies — said the event was widespread, depositing dust in an area spanning from the San Juan Mountains near Telluride to Rabbit Ears Pass near Steamboat Springs. Andrew Temple, a field assistant at CSAS, said McClure Pass south of Carbondale received more dust than any other site he visited for snow observation this week, including Park Cone east of Crested Butte and Spring Creek Pass south of Lake City…

In April, a dust storm arrived just as local snowpack was hitting its peak, meaning it remained high in the snow layers and affected almost the entire runoff process. Even with last year’s wet, cloudy spring conditions, Deems estimates the dust cut a month off the spring runoff season.

Westwide SNOTEL March 16, 2024 via the NRCS.

As the #ColoradoRiver shrinks, states continue to tussle over cuts — Jonathan P. Thompson (@Land_Desk) #COriver #aridification

Enigmatic artwork with Glen Canyon Dam in the background. Jonathan P. Thompson photo.

Click the link to read the article on The Land Desk website (Jonathan P. Thompson):

The two groups of Colorado River watershed states — the Upper Basin and the Lower Basin — have each come up with a respective preliminary plan for how to deal with a shrinking supply of water in the river and its tributaries. And, surprise surprise, they don’t agree: They both want the other team to take a bigger hit. 

Way back in early 1900s, the question facing these seven states was how to divide up the waters of the Colorado River, first between the two basins, then between the states within each basin. The 1922 Colorado River Compact answered that question. Sort of. The Compact is flawed in many ways, including that the folks who signed onto it thought there was a bunch more water than actually flowed in the river — even back then. 

I like to run this one again from time to time, just to remind folks how much the population of the West has grown over the last century. This is what the signers of the Colorado River Compact were dealing with as far as water users go — compared to some 40 million users now. Source: USGS.

Now there’s even less water and higher consumption. If the river users don’t make some major cuts and soon, the reservoirs will dry up and leave the Southwest’s cities, towns, and farms to fight over the diminishing scraps. 

“We can no longer accept the status quo of the Colorado River operations,” said Becky Mitchell, Colorado’s representative on the Upper Colorado River Commission, in a press release. “If we want to protect the system and ensure certainty for the 40 million people who rely on this water source, then we need to address the existing imbalance between supply and demand.” 

Map of the Colorado River drainage basin, created using USGS data. By Shannon1 Creative Commons Attribution-Share Alike 4.0

So now the question facing the states is similar to the one they asked 102 years ago, but with a twist: How should those deep cuts be divided up now that global heating is depleting the river’s flow? 

It’s a tough question with no easy answers. And it’s all made more difficult by a lack of clarity regarding the definition of terms in the original Compact such as “beneficial consumptive use” and “surplus,” and how to measure those things. Where does use of tributaries that run into the Colorado below Lee Ferry, such as the Gila River, the Little Colorado, and the Virgin River fit into all of this?

The “natural flow” is the estimated amount of water that would flow past Lee Ferry (below Glen Canyon Dam) if there were no upstream dams, diversions, or withdrawals. The Colorado River Compact was based on the assumption that about 16 million acre-feet flowed past Lee Ferry per year (which is not unreasonable given the abnormally high flows between 1906 and the late 1920s). In fact, the 1906-1923 median is about 14.5 MAF (with an average of about 14.7 MAF). And the 1991-2023 average is 13.2 MAF. Yikes! Source: Bureau of Reclamation.

Until those definitions are agreed upon, we won’t really know whether the Lower Basin is using the amount of water allocated to it in the Compact (8.5 million acre-feet), or significantly more than that (10.1 million acre-feet). Until we know what “surplus” means, we won’t know who is responsible for ensuring Mexico gets its allocated share. So far there is no agreement on those definitions. (For a detailed and intelligent take on this, please see Eric Kuhn’s and John Fleck’s piece on Fleck’s Inkstain blog). 

The good news is that the current proposals aren’t final; there is still time for the basins to negotiate. And the two basins’ representatives are inching closer to accord, finding harmony where it previously eluded them. The two alternatives agree:

  • That consumption cuts should be triggered not by forecasted water levels in Lake Mead, but by current hydrologic conditions throughout the entire system. However, they differ on how to measure those conditions. 
  • And that the Lower Basin should include evaporation and seepage — totaling an estimated 1.3 million acre-feet per year — in its consumptive use, as the Upper Basin has always done. They plan to offset this loss by cutting consumption by 1.5 million acre-feet per year. 
Total losses (evaporation and riparian ET) from Reach 1 through Reach 5. Credit: USBR

The main sticking point comes when reservoirs shrink to critically low levels:

  • Under the Upper Basin’s plan, as storage levels drop, they would release progressively less water from Lake Powell. So if water storage is 81% to 100% full, then they’d release 8.1 to 9 MAF from Glen Canyon Dam, giving the Lower Basin their full allocation. But if storage is less than 20% full, it would release just 6 MAF per year, giving the Lower Basin 2.5 MAF less than their allocation that year — presumably forcing them to cut that same amount of consumption. Whether and how much consumption the Upper Basin would have to cut under this scenario would depend on how much water is actually in the river. It’s important to note that the Upper Basin does not and has never used its full allocation of 7.5 MAF per year.
  • Under the Lower Basin’s plan, when the system is between 38% and 70% full, the Lower Basin would cut its consumption by 1.5 MAF per year. When system water levels drop below that, then the Lower Basin would continue its 1.5 MAF per year cuts, and the two basins would share any cuts above that up to a maximum of 3.9 MAF per year. So under the maximum cuts, the Lower Basin would reduce usage by 2.7 MAF while the Upper Basin would cut use by 1.2 MAF. 
The Upper Basin’s alternative, summed up. Source: Upper Colorado River Commission.
The Lower Basin’s proposed framework for reductions. The Lower Basin would make all of the cuts (1.5 MAF per year) down to 38%, after which the two basins would evenly split any reductions beyond 1.5 MAF. Source: Lower Basin states.

Both basins’ alternatives mention and acknowledge that many tribal nations’ water rights remain unfulfilled, and yet say little about how the situation might be rectified. And each Basin says its respective plan is the most sustainable, is most likely to keep Hoover and Glen Canyon dams from being compromised, and complies with the Law of the River — or the set of treaties, compacts, and court cases that govern how the river is used. 

Yet the sustainability or health of the Colorado River as an entity — a breathing, flowing, living being — is barely mentioned. Little thought is given to the ecosystems, cultures, and creatures the river sustains. I realize that’s not the point of this exercise. And yet, ultimately, it will be the River itself that lays down the law, not century-old compacts or legal precedents or antiquated water rights. Perhaps we ought to pay it a little more respect. 

FURTHER READING: 

  • Ya gotta check out the Colorado River Science wiki. All kinds of good resources there. 
  • Ditto for On the Colorado, a clearinghouse for all kinds of information on the River.
  • Aspen Journalism’s Heather Sackett did a thorough writeup of the two proposed alternatives. 
  • You want the wonky, nitty-gritty details on Western water? Then go to John Fleck’s Inkstain blog and spend some time. 
  • And finally, a Land Desk primer on the Colorado Compact. For paid subscribers only, I’m afraid:

The Colorado River Compact 

JONATHAN P. THOMPSON March 8, 2024

Colorado River, Black Canyon back in the day, site of Hoover Dam

Editor’s Note: This essay first appeared in the High Country News November 11, 2022.

Read full story

Romancing the River: Running the Real River — George Sibley (Sibley’s Rivers) #ColoradoRiver #COriver #aridification #CRWUA2023

DALLE Image by Scott Harding American Whitewater

Click the link to read the article on the Sibley’s Rivers website (George Sibley):

March 13, 2024

I really like the AI image above, created by a couple creatives at American Whitewater, Scott Harding and Kestrel Kunz. for a presentation at the Colorado River Water Users Association convention in January. It shows ‘the people who run the river’ running the river. But if you have ever been in that whitewater situation, you know that the river is really in charge; you run the river on the river’s terms. The guy standing up in the back of the boat is in charge of the boat, giving the others in the boat commands like ‘Five forward (strokes of the oars) on the right!’ ‘Two back on the left!’ ‘Everybody three forward!’ – trying to keep the boat on a ‘line’ he or she perceives through the rocks of the rapids. Thinking like the river to run the river.

We can draw some obvious analogies to Colorado River management – as Scott and Kestrel do in the picture above of the people in suits who ‘run the river.’ But the analogy breaks down quickly around the fact that they are all – we are all – in a boat without a boatman. Instead of all those who are running the river following directions from one person who is using his past experience to pick a line through the rocky places – ‘A 100,000 acre-feet to the Navajo!’ ‘Everybody cut 10 percent!’ – we are doing it through committees, groups, divisions, maybe some factions by James Madison’s classic definition (groups whose acts are ‘adverse to the rights of other citizens, or to the permanent and aggregate interests of the community’).

In this case we have the Lower Colorado River Basin on one side of the raft, the Upper Basin on the other side; they are each forming a perspective on the rocky places ahead and describing a line through them that requires issuing some advice or orders to those with oars on both sides of the boat about forward or backward actions, resulting mostly in quite a lot of noise, in which the intelligence from both sides gets rendered unintelligible….

There are various possible resolutions to such a situation. Some will say we have to have a boatman, one person to whom we will all listen and for whom we will all act obediently. On the real river, boatmen have to earn their right to be that person through experience. But on the metaphorical boat on the allegorical river, it is not always easy to select a boatman to get through the hard places because – what experience counts? What background is necessary and sufficient? What demonstrable skills? And there is always a loud narcissist in the boat who trumps the discourse by trumpeting that he or she is ‘the one, the only one that can get you through this’; those ‘strongmen’ appeal to many in the boat, when the better idea might be to just pull off the river before the hard place, unpack the lunch along with the situation, and work out a plan democratically before plunging in….

That is, in a sense, what is going on today in the Colorado River Region (natural basin plus out-of-basin extensions). Everyone knows that there are hard places as we all try to face up to some hard realities the river is imposing on us (at least partly because of hard things we have imposed on the river).

After a feel-good conference this January of the Colorado River Water Users Association, the seven basin states and representatives from the basin’s 30 First People nations sat down to work out a new set of ‘Interim Guidelines’ for an ‘interim’ beginning in 2027, to replace the tattered, battered and bandaged Interim Guidelines that the Colorado River waterworks have been working off of since 2007 with a ‘use by’ date of 2026.

The structural deficit refers to the consumption by Lower Basin states of more water than enters Lake Mead each year. The deficit, which includes losses from evaporation, is estimated at 1.2 million acre-feet a year. (Image: Central Arizona Project circa 2019)

That larger gathering hung together for several sessions; then, as I understand it, the three Lower Basin states withdrew to figure out how to handle a ‘structural deficit’ that is about one-fourth of their 8.5 million acre-feet (maf) allotment from the 1922 Colorado River Compact, which deficit they finally conceded was their responsibility – just their concession being a major step forward. The ‘other side of the boat,’ the Upper Basin states, began meeting on their own.

Now, just this week, the Basins have each submitted draft plans for post-2026 river management to the Bureau of Reclamation – the Upper Basin Tuesday March 4, and the Lower Basin Wednesday March 5.

I wanted to get something online this same week about this so my faithful readers would not think that I am asleep at the wheel or lost in river history, but there is no way to even obtain and read these plans, let alone try to make sense of them together, before my webmeister’s Friday deadline. So I’ll be back with you either next week or the week following with my two-bits on what’s going on.

Total losses (evaporation and riparian ET) from Reach 1 through Reach 5. Credit: USBR

But we can do a little backgrounding now. The ‘structural deficit’ the Lower Basin has finally conceded it must deal with is a substantial omission not covered in either the 1922 Compact nor in the subsequent elements of the Law of the River. It is, first, a compilation of all the ‘system losses’ from evaporation, bank storage, riparian vegetation, et cetera, from Mead Reservoir to the Mexico border – estimated by the Bureau of Reclamation to be around 1.3 million acre-feet (maf).

It also includes, second, up to 750,000 acre-feet that is the Lower Basin’s share of the Mexican obligation. Responsibility for these has been dismissed by the Lower Basin as being covered by ‘surplus flows’ – anything over the 7.5 maf the Upper Basin is committed to send through the canyons. For most of the 20th century this surplus was legitimate: water not yet being used by the Upper Basin and the Central Arizona Project, plus the occasional blessings of big water years. But for roughly the last quarter century that surplus has largely been a paper accounting; the ‘structural deficit’ that emerged was basically the Bureau drawing down storage in a time of drought to keep nurturing the ‘surplus’ fiction while praying for snow.

The 2007 Interim Guidelines were created to try to address this problem – but without really addressing it. The Guidelines were kind of a shell game, ‘balancing’ the contents of Mead and Powell reservoirs, with tipping points in the storage of both that would precipitate shortages being imposed on the Lower Basin states – but doing obeisance to California’s senior water rights by shorting the other two states first and most. And they continued releasing the substantial ‘structural deficit’ water to not force the Lower Basin states cut back on their own.

These ineffective guidelines led to the Bureau’s realization in 2022 – the centennial year of the Compact – that they might be two or three years from losing the storage in the big reservoirs entirely for much of the year, resulting in the quasi-panicky call to the seven states to cut consumption within a year by 2-4 maf.

I will not go through again all the plans and counter-plans that were proposed and analyzed to answer the Bureau’s call, but do want to call attention to the fact that the situation did revive a spate of ‘Caliphobia,’ when six of the Basin states prepared a plan for a proportionate sharing among the Lower Basin states of cuts that amounted to the structural deficit, but California would only participate if its substantial senior water rights were honored, with the other two states bearing the brunt of the cuts.

The Compact’s Signers. Photo via InkStain

This was – for me, at any rate – just more evidence of the extent to which the Colorado River Compact is a failed document. It was Caliphobia that had brought the seven states together in 1922 – California unenthusiastically – to create the Compact. All seven states had variations on the doctrine of prior appropriation as their foundational water law, and knew that the logic of the law meant they had to honor each other’s senior appropriations. But California was growing so fast, with claims on so much Colorado River water, that the other six states were concerned that there might not be enough water left for their own slower development.

Upper Basin States vs. Lower Basin circa 1925 via CSU Water Resources Archives

Their goal in coming together was to create a division of the river among the seven states that would override appropriation law at the interstate level, eliminating a seven-state appropriation horserace in which California was already lapping the field. California participated in the compact negotiations because Congress said there would be no money to build the big flood control and storage structures California desperately wanted until the seven states were in agreement on how the river’s water would be apportioned.

They were, however, unable to do the seven-state division they needed. They each came from their own state with estimates of their future needs that, in total, added up to half-again more water than even the 18 maf pluvial river carried in that first quarter of the 20th century. They were operating on dreams, not data, and after a couple days of critiquing each other’s numbers and defending their own, that gave up on the seven-state division.

The best they were able to do, in their November ten-day eleventh-hour do-or-die charrette was the two-basin division that gave the four states above the canyons some protection against California growth, but left the other two states below the canyons in the cage, as it were, with the thousand-pound gorilla, California. The Compact goal of ‘promoting interstate comity’ failed when Arizona refused to even ratify the Compact. And as average flows declined from the 1930s on, the Upper Basin’s Compact charge to ‘not cause the flow of the river at Lee Ferry to be depleted below’ the Lower Basin’s apportionment began to make the Upper Basin states feel more like juniors shorted to fulfill a senior water right than participants in an ‘equitable apportionment.’

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

Add in the failure to even mention the basin’s substantial system losses, and the Compact and subsequent Law of the River have not done much to ‘remove causes of present and future controversies,’ culminating in the situation we are in now, with California playing the seniority card on the other states, the Upper Basin and Lower Basin having different ideas about what it actually means to ‘not cause the flow of the river at Lee Ferry to be depleted below’ an average of 7.5 maf/year, and no one really wanting to face the fact that the Compact was written for a river half-again larger than the river we have now – with a modest but steady decline in this river as we continue to warm the world around it. We are going to have to impose, and accept, significant shortages that will have impacts on all of us, on the way we eat nationwide and how much we pay, as well as how we use water everywhere in the region.

What is truly ‘equitable’ when it comes to administering shortages? Or cutting right to the chase – to what extent should the appropriation doctrine dominate the discourse? Is ‘first-come-first-served’ to be the only measure for ‘equitable allocation’?

To put the question another way: could we acknowledge a distinction between water-use issues and all-river issues? Water-use issues can occur between agricultural users, and between agricultural and urban areas, and between urban areas. We have decided culturally to resolve those kinds of issues through the first-come-first-served laws, and whether that is the best way to resolve issues over water use or not, it is the way we do it. (Although it should be noted that, among multi-generation neighbors, with century-old water rights differing by a year or two, seniors seldom place ‘calls’ on their junior neighbors; they work out ‘gentlemen’s agreements’ to share the available water. Appropriation law can be brutal when strictly enforced.)

But all-river issues are matters above and beyond questions of prioritizing water use. Discovering that we are dealing with a river that is only two-thirds the size of the river the Compact was created for is an all-river issue. Trying to figure out how to do long-delayed water justice for 30 First People nations of varying sizes (with two-thirds of them in one state) on a fully appropriated river is an all-river issue. Managing for the unknown but unfolding consequences of a changing, warming climate is an all-river issue.

All-river issues are everyone’s problems, created and perpetrated by everyone, whether consciously or unconsciously; and in a just world everyone would share the pain of resolution in some equitable and proportionate way. With an all-river issue, ‘seniority’ just means the water user has been part of the problem, consciously or unconsciously, for a longer time.

I have some thoughts about how we could deal with some of our all-river issues, which I will no doubt unload on you over the next several posts, but I hope that if you have thoughts on it, you will unload them on me in comments below.

And I also hope some of the people actually at the table(s) are also trying to think beyond the limitations of the Compact and of the foundational law of the river, the prior appropriation doctrine that the Compact wanted to address but couldn’t. Like Becky Mitchell, Colorado’s main negotiator, said, ‘We must plan for the river we have, not the river we dream of.’

Colorado River “Beginnings”. Photo: Brent Gardner-Smith/Aspen Journalism

City of #Rifle commits $100,000 to the Shoshone Water Rights Purchase — The #GlenwoodSprings Post-Independent #ColoradoRiver #COriver #aridification

Photo: 1950 “Public Service Dam” (Shoshone Dam) in Colorado River near Glenwood Springs Colorado.

Click the link to read the article on the Glenwood Springs Post-Independent website (Katherine Tomanek). Here’s an excerpt:

The Rifle City Council listened to a funding request from a Colorado River District representative during their Wednesday regular session.

“We are asking that the City of Rifle consider a funding request for $100,000,” Amy Moyer said, Director of Strategic Partnerships for the Colorado River District…

The City Council authorized staff to sign a letter committing $100,000 to the purchase of the Shoshone Water Rights. This would be in the budget for 2025. 

“I just want everyone to realize how historic this Shoshone Water Rights Purchase is and how it can totally save the western slope in case something ever happened to Xcel or that power plant. So I’m glad they came in and I’m glad we’re partnering with them,” Councilor Clint Hostettler said in their closing comments for the meeting.

#ColoradoRiver basin states offer divergent plans to govern operations after 2026 — #Colorado Politics — #COriver #aridification

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

Click the link to read the article on the Colorado Politics website (Marianne Goodland). Here’s an excerpt:

The U.S. Bureau of Reclamation set a deadline of Monday for the seven states to come up with plans, but a hoped-for joint plan was not in the cards. By the end of 2024, the Bureau of Reclamation anticipates having what’s called a draft “environmental impact statement” that will present alternatives for how the Colorado River will operate in the decades to come. Those new guidelines will also determine the management and facilities of the two reservoirs, as well the Hoover and Glen Canyon dams…

Upper Basin plan

The plan submitted by the Upper Basin states calls for the following:

• A commitment from the Upper Basin states to help preserve the ability to make releases from Lake Powell, the nation’s second-largest reservoir that provides power through the Glen Canyon dam

• For Lake Powell: Modeled releases from Lake Powell that are based on hydrologic conditions and designed to rebuild storage to protect Lake Powell’s ability to make releases consistent with the Law of the River, as dictated by the 1922 Colorado River compact

• Lake Mead: Modeled Lower Basin operations adapted from a concept first provided by the Lower Basin States based on the combined storage of Lake Powell and Lake Mead…

The Lower Basin plan

Tom Buschatzke, the director of the Arizona Department of Water Resources and the state’s principal negotiator on matters relating to the Colorado River, said while he has not yet fully examined the upper division states’ alternative plan, he told Colorado Politics he is disappointed by what he’s seen so far.

• Addresses the structural deficit in the Lower Basin

• Operates the reservoirs based on system contents, rather than elevations at Lake Powell and Lake Mead

• Shared water use reductions broadly

• Creates provisions for the storage and delivery of stored water

• Releases from Lake Powell that are adaptable to a broad range of hydrology and “hydrologic shortages”

The alternative dictates cuts calculated by state — every state, not just those in the Lower Basin — depending on how much the levels drop at Lake Mead.

In dry years, #Colorado’s #CrystalRiver runs at a trickle — but why?: #Drought and relentless demand converge — @AspenJournalism #RoaringForkRiver #ColoradoRiver #COriver #aridification

The Crystal River flows past a stream gauge at the fish hatchery just south of Carbondale. This location has nearly dried up in late summer in recent years due to drought, climate change and senior water users’ upstream diversions. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Click the link to read the article on the Aspen Journalism website (Heather Sackett):

March 10, 2024

In 2012, one of the driest years in Colorado in recent memory, the Crystal River practically dried up. 

Ken Neubecker, a now-retired Colorado projects director at environmental group American Rivers and former member of the Pitkin County Healthy Rivers board, recalls the stream conditions.

“I took a photo on the Thompson Road bridge, and it was running about 1 cubic foot per second, if that,” he said. “It was mostly dry rocks with some puddles in between.” (One cfs, which is equivalent to the amount of water to fill one basketball, is a common way to measure the flow of water.)

These extremely low-water conditions returned in the drought years of 2018, 2020 and 2021, with river flows near the fish hatchery just south of Carbondale hovering around 8 to 10 cfs — not enough to support aquatic life and nowhere near the 100 cfs that the state of Colorado says is the minimum needed to maintain a healthy stream. 

Map of the Roaring Fork River drainage basin in western Colorado, USA. Made using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69290878

Beginning high in the Elk Mountains, the Crystal River flows 40 miles through a canyon under the flanks of Mount Sopris and winds past the towns of Marble, Redstone and Carbondale before joining with the Roaring Fork River, a major tributary to the Colorado River. Along the way, its waters turn mesa hayfields, acres of alfalfa, and town parks and lawns a verdant green. 

A historic drought driven by climate change and temperatures that creep ever higher are partly to blame. But the factors that lead to a dry river bed are many and include unique geology, ill-defined legal concepts, misunderstandings about the value of water, inefficient irrigation systems and vague state guidelines regarding waste that seem to be enforced only under specific circumstances.  

These barriers to conservation are widespread across western Colorado. The Crystal River is one place where these complex issues converge, resulting in a chronic dry-up of stream sections in late summer most years. To Neubecker, the cause is water users taking more than they need and not leaving enough for downstream users — especially when the “user” is the river ecosystem itself.

“It just dries up a stretch of river and disconnects the upper part of the river from the lower part,” he said. “You have to be a good neighbor, and that concept has been totally thrown by the wayside.”

The Crystal is not unique. Rivers throughout the West face increasing pressure from chronic overuse, warming temperatures and prolonged dry spells. Persistent dry-ups that span weeks or months are a familiar feature of many so-called “working rivers” that supply water to the West’s sprawling farmlands and growing cities. 

As scarcity has gripped the states that make up the headwaters of the Colorado River, a new level of scrutiny has fallen on water uses once considered insignificant, even small hayfields or grassy front yards. Communities throughout the West are now under pressure to justify their use of any amount, and make a case for continuing to do things the way they’ve always been done.  

To better understand these issues plaguing the Crystal, Aspen Journalism examined the river’s biggest users to create the most complete picture possible of how water is used, why dry conditions persist and what can be done about it. We created a detailed analysis using publicly available information; state-of-the-art, satellite-based measurements; interviews with experts; and, where possible, site visits and ditch tours. 

Understanding exactly how the West’s water is used — and perhaps where opportunities for efficiency improvements exist — will only become more crucial in a hotter, drier future with increasing scarcity across the Colorado River basin.

Crystal River Ditches. Credit: Laurine Lassalle/Aspen Journalism

Low ditch efficiencies

According to Aspen Journalism’s analysis, some of the Crystal’s biggest diverters have very low ditch efficiencies, meaning that the crops they grow are using just a small fraction of what they take from the river. 

The low efficiencies pose the question: Does the small amount of water that is actually used by the crops justify the large amounts diverted from the Crystal, to the detriment of its ecosystem?

Of the 42 active ditches on the Crystal according to the Colorado Division of Water Resources (DWR) database, Aspen Journalism examined the top eight: those with the biggest and oldest water rights, the majority of which date to the 1880s. The analysis compared how much they were taking out of the stream based on diversion records maintained by DWR and how much water was absorbed by crops. Known as evapotranspiration, this is tracked by satellites through a publicly available platform called OpenET. Evapotranspiration is a measure of the amount of water used by crops, also called consumptive use. 

Aspen Journalism’s analysis shows that Crystal River ditches that irrigate primarily agricultural land — the East Mesa, Lowline and Ella — have an average efficiency of between about 12% and 14%. That means the crops that are irrigated by these ditches use 12% to 14% of the water the ditch diverts. An outlier is the Sweet Jessup Canal, which irrigates Crystal River Ranch and whose crops use nearly 30% of the water it diverts, according to our analysis. Much of this ditch is lined or piped, making it more efficient.

For ditches that are used primarily for outdoor watering of residential lawns, gardens, ballfields and parks — ditches such as the Carbondale Ditch, the Weaver & Leonhardy, Bowles & Holland, and the Rockford, the latter of which also irrigates some agricultural land — our analysis showed lower efficiencies, ranging from less than 1% to about 9%. However, that analysis likely represents an undercount of the amount of water consumed on smaller parcels.  

OpenET is becoming a widely used tool by water managers, including by the Upper Colorado River Commission, to calculate the water savings on individual fields that participate in its 2023 and 2024 System Conservation Program. Still, this technology has limitations. For example, the satellites work best on parcels that are at least .22 acres, so consumptive use tied to many residential lawns and gardens that are irrigated with water from these ditches is probably not included in these calculations. There is also no way to account for the amount of water a crop uses that comes from precipitation. Including that figure would result in lower ditch-efficiency percentages. For a complete explanation of how Aspen Journalism got these numbers, including all the caveats and limitations of the data, see our methodology breakdown

The two ditches owned and operated by the town of Carbondale — the Carbondale Ditch and the Weaver Ditch — appear to be using a particularly small percentage of the overall water they take from the river. These ditches weave through the front yards, parks and alleyways of Carbondale, contributing to the charming, small-town feel and adding a riparian ribbon of green to an arid landscape. In general, these ditches that are used by residents to water their lawns and gardens have less-consumptive use than ditches that are all or nearly all agricultural use. However, since the OpenET does not pick up small lawns and gardens, it’s hard to know exactly how much water is being consumed from these ditches.

Kevin Schorzman, public works director for the town of Carbondale, said the town does not track ditch efficiencies, consumptive use or the number of homes that use ditch water for their lawns. He said the town has undertaken several projects over the past few years that should lead to improved efficiency in the ditch system, including lining portions of the Carbondale and Weaver ditches with concrete as well as piping sections of both ditches. 

Officials have pointed to a river restoration project, which includes headgate modernization and automation on the Weaver Ditch as having benefits for the environment. But Schorzman said the project may or may not impact diversions from the river.

Colorado Division of Water Resources Division 5 and District 38. Credit: Laurine Lassalle/Aspen Journalism

Inefficiencies widespread

James Heath, DWR engineer for Division 5, agreed that Aspen Journalism’s ditch-efficiency numbers, while low, looked pretty reasonable. Additionally, a 2015 consumptive-use analysis of the Colorado River basin by Wilson Water Group put the overall system efficiency for the area that includes the Crystal’s watershed at 10%, which is in line with Aspen Journalism’s findings.

Very low ditch efficiencies seem to be common throughout Division 5, which contains the headwaters of the Colorado River. The 2015 Wilson Water Group study showed efficiencies in sub-basins ranged from 10% to 31%. Two other mountainous headwaters — the Blue River and Eagle River basins — had efficiencies of 14% and 16%, respectively. 

Eric Kuhn, a Colorado River expert, author and former general manager of the Glenwood Springs-based Colorado River Water Conservation District, said the Crystal’s ditch efficiencies are in line with other places in western Colorado. He said irrigators in some basins are diverting 10 to 12 acre-feet for every acre-foot that their crops end up using. 

“Those are the numbers we kind of got used to when people looked into them in detail,” Kuhn said.

It is common knowledge that ditches must take more water than only what is needed by crops, as pointed out by Joe White, director of finance at Colorado Rocky Mountain School. The private boarding school is the largest shareholder on the Rockford Ditch, which diverts from the Crystal.

“I don’t think that should surprise anyone,” White said. “Diversions are never going to equal consumptive use. Everyone knows it takes more diversion than consumptive use to deliver water to where it needs to be applied.” 

White said Aspen Journalism’s numbers sound too low, but he did not provide his own consumptive-use numbers for the Rockford Ditch. White added that the Rockford needs to be kept full so that the lawn-watering irrigation pumps in the nearby neighborhood of Satank function properly.

“It’s challenging to regulate it as efficiently as we would like to,” he said.

Because the Crystal is not the only overtaxed stream in Colorado dealing with these issues, cities across the state are attempting to deal with water scarcity. That can be through strict conservation measures and, in particular, wringing water from nonfunctional, ornamental grass by banning its planting and incentivizing its removal. 

But so far, widespread mandatory conservation measures — cracking down on waste and implementing efficiency standards — have not been aimed at agriculture, which is by far the biggest water-use sector and potentially has some of the lowest-hanging fruit to find water savings through irrigation improvements. 

This parcel of land on Prince Creek Road is owned by Bailey Family Investment Company and is watered with Crystal River water via the Ella Ditch. The sprinkler gun system was installed in recent years.
CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Reasons for low efficiencies

There could be several reasons why ditch efficiencies on the Crystal are low. The most basic is that flood irrigation is less efficient than sprinklers. About 58% of agricultural lands on the top eight ditches are flood irrigated, according to data from the state DWR. Many ditches were also built in the late 19th century and are not lined or piped, meaning that some of the diverted water is lost to leakage. 

Some of the diverted water is lost to thin, rocky soils that water percolates through quickly. Irrigators often need to divert extra water, known as “push water,” to ensure that there’s enough pressure to get the water all the way to land at the end of the ditch, which is sometimes miles from the point of diversion. These transit losses are not considered part of consumptive use and are not measured by OpenET. 

There is some evidence that soils in the area are especially rocky — the Crystal River was originally named Rock Creek — which may be contributing to low efficiency, allowing water to seep through the bottom and sides of ditches before reaching a farm field.

Heath, the division engineer, also found evidence of this from drill logs for water wells in the area. 

“They are running into some pretty coarse materials at shallow depths that would cause a lot more ditch loss, a lot more deep percolation, which would increase the losses and cause the overall system efficiencies to go down,” Heath said. “So, I think it’s pretty reasonable, the numbers you’re coming up with.”

Much of the diverted water that the crops don’t use eventually seeps back to the river over days, weeks or months, a phenomenon known as “return flows.” If the Crystal River Valley’s geology really is as porous as evidence suggests, return flows probably make it back to the river quickly, without much being stored for late-season returns. 

The problem with return flows is that they do not go back into the river at the same spot they are taken out and have a delayed return, contributing to seasonal dry-ups. And after percolating through the soil, return flows can be warm and laden with salt and other contaminants, impacting the river’s overall quality and the fish that depend on cold, clean water.

The Weaver Ditch, maintained by the Town of Carbondale, runs through downtown, turning parks and lawns green. A headgate modernization project may not result in less water diverted from the river, according to town officials. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Is water being wasted?

Carbondale’s Schorzman said the town is adhering to state guidelines on waste and operating the ditch systems in a manner that is reasonably efficient. But pinpointing who might be wasting water in Colorado is difficult.

According to state guidelines on waste from 2017, which recently retired Colorado state engineer Kevin Rein said are still in effect, “a person shall not run through his or her ditch any greater quantity of water than is absolutely necessary for irrigation, domestic, and stock purposes to prevent the wasting and useless discharge and running away of water.”

The guidelines define waste as “diverting water when not needed for beneficial use, or running more water than is reasonably needed for application to beneficial use.” Beneficial use is defined as “the use of that amount of water that is reasonable and appropriate under reasonably efficient practices to accomplish without waste the purpose for which the appropriation is lawfully made.” 

But “reasonably efficient” is not clearly defined. And how much more water ditches should take than what’s needed by crops is also unclear. Determining whether an irrigation practice is reasonable or wasteful is subjective.

Much like the famous Supreme Court test for obscenity, Rein said water commissioners have a good idea of what waste is when they see it. DWR has not done an efficiency analysis on the Crystal ditches, and Rein said he cannot identify a threshold for “reasonable” because every system is different. 

“I don’t know whether it was intentional or not, but it’s important to our administration that it allows for judgment and for evaluation of myriad factors,” Rein said, referring to the subjective nature of the criteria.

The Rockford Ditch has the oldest water rights on the Crystal River. It irrigates some agricultural land as well as the lawns and gardens of the Colorado Rocky Mountain School and the Satank neighborhood of Carbondale. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Divert it or lose it?

Another potential explanation for the low use numbers could be that some irrigators are overdiverting based on a misunderstanding of Colorado water law. The true value of a water right is tied to its historical consumptive use, which is how much water the crops use. However, there is an entrenched, incorrect belief that by maximizing the amount of water taken from a stream, one can increase the future value of a water right or protect it from abandonment. Many interpret Colorado’s famous “use it or lose it” doctrine as “divert it or lose it.” 

“The reality of that is sometimes it can feel like you have something on paper and giving up something you have on paper feels like you’re losing something,” said Assistant Pitkin County Attorney Laura Makar. 

According to a 2016 special report by DWR officials and experts at the Colorado Water Center at Colorado State University, “use it or lose it” is commonly seen as a barrier to implementing water-conservation measures and efficiency improvements.

Users are told to divert their whole amount, “in order to preserve the water right; that is, protect it from abandonment and/or lead to the maximum value of the water right in a water right change proceeding,” the report reads. “This conclusion is based on a misapplication of the law.” 

In reality, there are two requirements for abandonment: A water right must sit dormant and unused for 10 years, and the owner must intend to abandon it. For the past 20 years, DWR has had a policy of not placing water rights that date to before the 1922 Colorado River Compact on the abandonment list, which is compiled every 10 years. This means pre-compact water rights (like many of those in the Crystal analysis) have an additional layer of protection from abandonment, even if they meet the two requirements.

Neubecker said taking more water than you can use violates one of the most sacred concepts at the heart of Colorado water law: the duty of water. The duty of water is the amount needed to grow a crop — not the maximum allowed by a decree — and varies depending on crop type and location.  

“Technically, it is against the law to take more water than you actually need regardless of what your decree says,” Neubecker said. “It’s just that neither the lawyers nor the state engineer’s office are going to enforce it.”

The Bowles & Holland Ditch, named after two of Carbondale’s earliest white European settlers, used to grow crops like potatoes. Now it mostly irrigates the lawns and golf course of River Valley Ranch. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Low efficiencies not a problem for state officials

DWR officials don’t have a problem with inefficient ditches as long as irrigators are not wasting water. Rein said that low efficiency doesn’t mean irrigation is being done improperly. 

“I’m not aware that we have evidence of waste occurring on those systems,” Rein said.

There was, however, at least one documented instance of alleged water waste that occurred on the Crystal in recent years. In 2018, former water Commissioner Jake DeWolfe restricted how much water was flowing into the Lowine Ditch for taking more than it could put to beneficial use. Attorneys for one ditch user, Tom Bailey, complained in a letter to DWR, saying that the commissioner’s determination of waste was “ambiguous and erroneous,” and that the guidelines for waste are unlawful, claims that reflect the subjective nature of defining waste. DeWolfe declined to speak with Aspen Journalism for this story.

One of the ways water commissioners determine if waste is occurring is by looking at what is known as the “tail water,” which is where, after irrigating land, the ditch returns the water to the river. In 2018, DeWolfe said the large amount of tail water from the Lowline was an indication of waste. 

The situation on the Crystal in 2018 is indicative of how state officials manage the river. The system is complaint-driven, meaning water commissioners will usually focus their efforts on streams where a water user has placed a call or where they have heard complaints of waste from water users. If a river is not on call, if no one is reporting their neighbors for taking too much or if there are no obvious indicators such as flooding, water commissioners probably won’t scrutinize ditches for waste. In most cases, tail water is not measured.

According to Heath, since 2018, no complaints about waste in the Crystal River basin have been received and waste has not been observed by water commissioners. Therefore, curtailment of structures within the Crystal River basin for waste issues has not occurred since 2018.

Heath said that as long as irrigators aren’t taking extra water to expand their historical irrigated acreage, his office doesn’t have an issue with low ditch efficiencies.

“As long as they continue to operate as they have historically operated, I don’t see that there is a problem with the diversions they are making,” he said. “They are operating their ditches and irrigating as they always have, and it just yields a low system efficiency.” 

This section of the Lower Crystal River dried up during the late summer of 2012, a drought year. The dry stretches occurred again in 2018, 2020 and 2021, with the river hovering at around just 8 cfs. CREDIT: KEN NEUBECKER

When the river is harmed

In Colorado, inefficient or wasteful practices are only considered such if they deprive another senior user of water. 

But what if the other water user being harmed is the river ecosystem itself? There are few ways to ensure that enough water stays in the river for the fish, plants and animals that depend on it.

The stretch of the Crystal River just south of Carbondale near the Colorado Parks and Wildlife fish hatchery has a tendency to dry up during the late irrigation season. The problem is worse in dry years, and the tool meant to address it is limited in what it can accomplish. 

The Colorado Water Conservation Board holds instream flow water rights on the Crystal River, which are intended to preserve the natural environment to a reasonable degree. They date to 1975 and are some of the oldest instream flow rights in the state. Although the Crystal River was here long before any humans inhabited the valley, under the cornerstone of Colorado water law known as prior appropriation — where the oldest rights, which almost always belong to agriculture and cities, get first use of the river — the instream flow rights that protect the river itself might as well have been born yesterday. 

The instream flow right is 100 cfs on the stretch of river between Avalanche Creek and its confluence with the Roaring Fork, but it is rarely met from August to October. The reason?

“It’s the senior uses in the area,” said Rob Viehl, chief of the Colorado Water Conservation Board’s stream and lake protection section. “There are a lot of large senior irrigation ditches right above the fish hatchery gauge that divert a lot of water. They are in priority, and they are legally senior to the instream flow.”

The dry stretch is immediately downstream from the diversion for the Carbondale Ditch, which can pull 42 cfs from the river.

“Carbondale definitely needs to do some ditch-efficiency work,” Neubecker said. “The town of Carbondale is the single-biggest water rights holder on the Crystal.”

Cold Mountain Rancher Bill Fales turns the headgate of the Lowline Ditch. Fales is participating in a non-diversion agreement with the Colorado Water Trust to keep more water in the Crystal River. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Possible solutions

Much of western Colorado’s irrigation infrastructure is stuck in the 19th century. Upgrading ditches and headgates — and, in turn, making them more efficient — can be costly. 

Matt Rice, southwest regional director for environmental group American Rivers, said Aspen Journalism’s analysis points to the need to upgrade that infrastructure. And with billions of dollars in federal funding available, now is a good time for these types of projects, he said.

“If you need that much nonconsumptive push water to get your 11 or 7 or 9%, my sense is that there is a lot of opportunity to do things better,” Rice said. “It seems to me that infrastructure modernization on the Crystal could be a key thing to investigate.”

Colorado River environmental groups — including American Rivers, Trout Unlimited, The Nature Conservancy, Pitkin County Healthy Rivers — have funded and worked on agricultural infrastructure improvement projects that claim to have multiple benefits for agriculture, the environment and recreation. The idea is that if a project makes an irrigation system more efficient, less water will need to be diverted from a river. 

But although they may improve riparian habitat or create safer passage for boats, there’s no evidence these projects result in more water left in rivers. Of all the experts Aspen Journalism interviewed for this story, none could point to a ditch infrastructure improvement project that resulted in a measurable decrease in diversions, as reflected in diversion records maintained by DWR. Simply quantifying flow needs specifically for recreation and the environment through stream-management plans has been thwartedin recent years by agricultural interests. 

The town of Carbondale and other groups have recently completed a headgate modernization project on the Weaver Ditch, which supporters say will benefit the environment. But Schorzman, Carbondale’s public works director, said in an email that the project “may or may not impact diversion amounts.”

Environmental groups say they must work with — and not against — agriculture since they are the biggest water-user sector and that building relationships is important. In that spirit, Pitkin County Healthy Rivers has earmarked tens of thousands of dollars (the exact amount the project will cost is still unclear) to fund a piping project for the East Mesa Ditch, which had a blowout from sinkholes in September. Healthy Rivers has not secured a commitment from ditch owners that there will be any benefit to river flows from the piping project, even though part of its mission is to maintain and improve the quantity of water in local streams.

“The question is: How can we stay true to our charter of maintaining streamflow while helping somebody divert water from the river?,” Pitkin County Attorney John Ely said at a September Healthy Rivers meeting. “You simply can’t preserve water in the river at all without someone you can work with and someone who holds a relatively senior water right. … You can’t solve the riddle of how to protect streamflow without working with agriculture.”

An often-heard refrain from water users is that if they leave the water in the river, it will just get picked up by the next downstream user, so they may as well divert it. That is true to a degree. But if all the water users on a system were to become more efficient, they might be able to each take less. 

And a new state law allows water users to get paid to temporarily lease water to the state’s instream flow program for five out of 10 years. The loaned water is tracked by DWR officials so that it stays in the river through the stretch where it’s needed. So far, the program is little-used — just nine projects so far statewide — and no water users on the Crystal are currently doing this type of instream flow loan. 

Crystal River rancher Bill Fales stands at the headgate for the Helms Ditch, with Mount Sopris in the background. As part of an agreement with the Colorado Water Trust, Fales could be paid to reduce his diversions from the ditch when the river is low. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Carbondale ranchers Bill Fales and Marj Perry are participating in a slightly different program, a non-diversion agreement with the Colorado Water Trust designed to leave more water in the river. When river flows dwindle to less than 40 cfs, Fales will get paid to reduce his diversions from the Helms Ditch, which could result in an additional 6 cfs in the Crystal.

“Obviously we are like everybody else — we hate to see the river dry,” Fales told Aspen Journalism in 2022.

Colorado’s entrenched water law system protects those European American settlers who first put the water to beneficial use, growing crops and building cities. One hundred and forty years later, that system still reflects the values of the time that the concept of prior appropriation was invented and largely excludes water for the environment, recreation or tribal communities. But as water supplies continue to be squeezed across the Colorado River basin, that may one day change.

“Change is hard,” Makar said. “If we have a system that has been in place and working one way for a long time, it requires new education, new materials. … I think it’s worth it, and I think that the system is eventually going to require it. But that doesn’t mean it’s easy.”

This story was produced in partnership with The Water Desk, an independent initiative of the University of Colorado Boulder’s Center for Environmental Journalism.

Lower Basin wants #Colorado to tighten the spigot during water shortages — The #Aspen Daily News #ColoradoRiver #COriver #aridification

Hoover Dam and Lake Mead. Photo credit: USBR

Click the link to read the article on the Aspen Daily News website (Austin Corona). Here’s an excerpt:

March 8, 2024

Becky Mitchell, Colorado’s interstate representative on the river, has said the subject of Upper Basin cuts is “untenable and also impossible.” Mitchell has said that the Lower Basin is responsible for declining water levels in the reservoirs.

“The Upper Basin states have used about 3 to 4 million acre-feet less than their apportionment when at times the Lower Basin has used 3 to 4 million more than their apportionment,” Mitchell said during a Feb. 15 information session. “I think one of the first steps before discussing shared shortages is for all in the basin to use only what they’re legally entitled to.” 

Mitchell said that while Lower Basin states can rely on Powell and Mead for their water supplies, Upper Basin states can only rely on natural precipitation, meaning less certainty and more frequent times of shortage. The Lower Basin’s proposal includes reduced releases from Lake Powell based on Upper Basin hydrological shortages, meaning in theory that the Lower Basin could see shortages from precipitation just as the Upper Basin does.

Upper Basin water cuts have never occurred before, and the legality and structure of such cuts is unclear. During the 2023 Colorado Water Congress in Steamboat Springs, Denver attorney David Robbins, who is one of Colorado’s alternate representatives on interstate river matters, argued that it would take “a tremendous amount of litigation” for the federal government to exercise authority over Colorado’s water use as it does in the Lower Basin.

Map credit: AGU

Upper Division #ColoradoRiver States Propose Alternative for Sustainable Operations of Post-2026 Operations of #LakePowell and #LakeMead #COriver #aridification

Credit: Upper Colorado River Commisstion

Click the link to read the release on the Upper Colorado River Commission website:

This week, the Upper Division States of Colorado, New Mexico, Utah, and Wyoming submitted to the Bureau of Reclamation an Alternative for Post-2026 Operations of Lake Powell and Lake Mead. The UDS Alternative proposes operations for Lake Powel and Lake Mead designed to help provide water supply certainty and sustainability in the face of a drying and uncertain future.

The purpose of the Upper Division States Alternative is to provide a set of modeling assumptions and operating parameters to the Bureau of Reclamation for Post-2026 Operations of Lake Powell and Lake Mead as part of the review process required under the National Environmental Policy Act (NEPA).

Separate from this NEPA process, the Upper Division States (UDS) will also pursue Parallel Activities. Parallel Activities are other activities the Upper Division States might take under certain conditions. Examples include potential releases and recovery at the Colorado River Storage Project Act (CRSPA) Initial Units and voluntary water conservation programs that would help to protect the ability of Lake Powell to make releases.

The Upper Division States Alternative provides:

Management of the reservoirs to address the existing imbalance between water supply and demands in the Lower Basin;

● Operations based on actual conditions—instead of unreliable forecasts—to ensure that Lake Powell and Lake Mead are operated sustainably;

● Efforts to rebuild storage at Lake Powell to protect the reservoir’s ability to provide water to Lake Mead;

● Reliance on the best available science and information, including impacts caused by climate change;

● Consistency with the Law of the River;

● Accounting of Upper Basin’s hydrologic shortages, which average an estimated 1.2 million acre-feet each year; and

● Acknowledgement of the settled but undeveloped Tribal water rights in the Upper Basin.

“We can no longer accept the status quo of Colorado River operations,” said Becky Mitchell, Colorado’s Commissioner to the Upper Colorado River Commission. “If we want to protect the system and ensure certainty for the 40 million people who rely on this water source, then we need to address the existing imbalance between supply and demand. That means using the best available science to work within reality and the actual conditions of Lake Powell and Lake Mead. We must plan for the river we have – not the river we dream for.”

Estevan Lopez, New Mexico’s Commissioner, said, “The Colorado River Basin is at a critical juncture. The UDS Alternative seeks to acknowledge the Upper Basin’s realities, including hydrologic shortages, protect Upper Basin interests, and contribute towards future sustainability of the entire basin. We look forward to working with our sister Lower Basin States to resolve differences in approach and create a 7-state consensus alternative.”

“This is a pivotal moment for Utah and the entire Upper Basin,” said Gene Shawcroft, Utah’s Upper Colorado River Commissioner. “Our proposal represents a balanced approach, combining immediate action with long-term planning to ensure the sustainability of both Lake Powell and Lake Mead. It’s about adapting to the realities we face today and securing a water-resilient future for our region.”

The Upper Division States are committed to working with partners in developing a preferred alternative. The UDS Alternative is available in detail on the Upper Colorado River Commission’s website, along with an infographic.

Colorado River “Beginnings”. Photo: Brent Gardner-Smith/Aspen Journalism

$350,000 more donated to Shoshone water rights purchase — The #GrandJunction Daily Sentinel #ColoradoRiver #COriver #aridification

The Shoshone hydro plant in Glenwood Canyon, captured here in June 2018, uses water diverted from the Colorado River to make power, and it controls a key water right on the Western Slope and that right is in the process of being acquired by the Colorado River Water Conservation District. Photo credit: Brent Gardner-Smith/Aspen Journalism

Click the link to read the article on The Grand Junction Daily Sentinel website (Dennis Webb). Here’s an excerpt:

February 28, 2024

In their board meetings this month, the Clifton Water District and Grand Valley Water Users Association kicked in $250,000 and $100,000, respectively, toward the Colorado River District’s proposed purchase of the rights. The Orchard Mesa Irrigation District and Grand Valley Irrigation Co. have also informally agreed to financially support the effort and are awaiting final action in upcoming board meetings, according to a new release from the river district…

Clifton Water serves nearly 13,000 domestic taps. On the Western Slope De Beque, Silt, Parachute, Battlement Mesa and Rifle also rely on the river as their primary supply of drinking water. Grand Valley Water Users Association delivers irrigation water to more than 22,000 acres within its boundaries and more than 42,000 acres in the Grand Valley…

The river district also hopes to secure about half of the money for the purchase from the U.S. Bureau of Reclamation in the form of Inflation Reduction Act funds. Sealing the deal also is contingent on negotiating an instream flow agreement between the Xcel, the river district and the Colorado Water Conservation Board, and Xcel receiving approval from the state Public Utilities Commission for the dispersal of profits from the sale.

Research Article: Anthropogenic #ClimateChange has influenced global river flow seasonality — Science

Click the link to access the report on the Science website (Hong Wang, Junguo Liu, Megan Klaar, Aifang Chen, Luka Gudmundsson, and Joseph Holden). Here’s the editor’s summary:

February 27, 2024

Editor’s summary

Patterns of river flow vary seasonally, which has important effects on the occurrence of floods and droughts, degrees of water security, and ecology. What is anthropogenic climate change doing to these seasonal cycles? Wang et al. used in situ observations of monthly average river flow from 1965 to 2014, combined with modeling, to show that human effects on climate have already caused a reduction of river flow seasonality at latitudes above 50° N. Understanding these changes is necessary for ensuring that freshwater ecosystems maintain their essential functions, for securing sustainable water resources, and for determining allocations for irrigation or hydropower generation. —H. Jesse Smith

Ignoring an Inconvenient #ColoradoRiver Basin Risk — John Fleck (InkStain.net) #COriver #aridification

Sometimes all we can do is sit and watch and wonder. Credit: John Fleck/InkStain

Click the link to read the article on the InkStain website (John Fleck):

It is agonizing to watch this, but here we are.

With efforts by the Colorado River Basin states to craft an agreement to share the river’s water skidding, brakes screeching, toward a cliff, we appear on the brink of repeating the disastrous mistake the authors of the Colorado River Compact made a century ago: ignoring inconvenient truths about the risks we face, washing away genuine uncertainties with convenient talking points.

As Eric Kuhn carefully documented in a post here [February 22, 2024], there is once again a genuine risk that we will ignore inconvenient truths about a huge uncertainty in our understanding of how much water the river can offer us, and for whom. We are pretending that an uncertainty literally at the scale of millions of acre feet in how we measure and manage water does not exist.

Resource: A freight train of thoughts about the Colorado River — Allen Best (Big Pivots)

Becky Mitchell. Photo credit: Allen Best/Big Pivots

A masterful Upper Colorado River Basin public relations blitz, led by the Colorado Water Conservation Board, would have us believe one set of numbers about the river’s future, a set of numbers that has given Upper Basin water users comfort that they can sit tight and blame others for the river’s woes.

But as Eric’s analysis showed, there are hidden assumptions behind the Upper Basin’s numbers – assumptions that hide a genuine and irreducible uncertainty. The uncertainty is irreducible because more than a century after the adoption of the Colorado River Compact, there is still no agreed upon definition of how to measure the use of water. As Eric wrote, these are questions “with enormous potential impacts on the allocation and distribution of the shrinking Colorado River – questions we have avoided dealing with by draining the Basin’s reservoirs. We no longer have that option.”

ARITHMETIC AND LAW

Eric is a master of the arcane and wonky details of the interface between Colorado River law and hydrology, and I commend you to his analysis – it rewards a careful read. But Eric once described my role in our collaboration as “dewonkifying”, so let me try to put this in simpler terms.

The 1922 Colorado River Compact based its allocations on “beneficial consumptive use”. But the phrase was never defined, and the definitions ended up bitterly contested in the decades that followed. It remains undefined to this day. Or rather, there are two competing definitions that yield very different results.

Each definition makes intuitive sense, and at first glance they look puzzlingly similar. But at the scale of the Colorado River Basin they yield very different results that have become a critical piece of the current basin management debate.

Method A is based on the collective amount of water communities take from the river, minus the amount they return – “diversions less return flows.”

Method B is based on the ultimate impact of that use on the Colorado River downstream of the use – for the Upper Basin, for example, at Lee Ferry, or for Arizona at the confluence of the Gila and the Colorado near Yuma. This is the “stream depletion theory”.

Those might sound so similar that the differences are trivial. And at localized scales they are. But, as Eric explained in yesterday’s post, with a classically Eric Kuhn working out of the mathematical details (I love collaborating with this guy – he shows his work!) at the scale of the Lower Colorado River Basin the differences amount to nearly 2 million acre feet of water.

Under Method A, Lower Basin use is more than 10.1 million acre feet per year, well above its Colorado River Compact allocation of 8.5 million acre feet. This is the methodology the Colorado Water Conservation Board staff used in its now-famous PowerPoint slide purporting to demonstrate that the  Lower Basin is using more than its legally allotted share of the Colorado.

But under Method B, Lower Basin use is some 8.3 million acre feet – less than its Compact allocation. Importantly, Method B is the method adopted by the Upper Basin Compact, and therefore the method used in the Upper Basin’s management of its share of the river.

LET’S BE HONEST ABOUT THE UNCERTAINTIES

To be clear, Eric and I are not arguing in favor of or B. We are arguing, as we did in our book Science be Dammed(we spent chunks of three chapters on this question), that the lack of an agreement over the definition of “beneficial consumptive use” remains a genuine and important unresolved uncertainty in the Law of the River, and our discussions of the future management of the Colorado River need to acknowledge that uncertainty, not pretend that it does not exist.

This is what I, as a stakeholder whose community depends on the Colorado River, expect of those leading the interstate effort – public honesty about the genuine risks and uncertainties we face.

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

On the #ColoradoRiver, there are no Simple Disputes — Eric Kuhn (InkStain.net) #COriver #aridification

Click the link to read the article on the InkStain website (Eric Kuhn):

February 22, 2024

One of the commentors to our January 19th, 2024, blog post titled “Are We headed for the First Colorado River Compact Tripwire?” – John C. (who, by-the-way runs a very talented water resources engineering firm) raised several finer points to explore further:

The first point deals with obligations of each Basin to contribute water needed to meet U.S. obligations to Mexico under the 1944 Treaty. The second deals with the question of how to measure, and therefore manage, in the context of overall Colorado River Basin management, the use of tributary water in the Lower Basin. Both represent unresolved legal questions with enormous potential impacts on the allocation and distribution of the shrinking Colorado River – questions we have avoided dealing with by draining the Basin’s reservoirs. We no longer have that option.

The two issues have been disputed for decades. They are, of course, totally inter-related, and when one peels back the layers of each, the problems get so complicated that the only real solution may be for the Basin’s states and other stakeholders to ignore their past positions and grievances and negotiate a river management approach that works on the river we have today, even if that means changes to the foundation of the Law of the River, the 1922 Compact.

MEXICO OBLIGATION

The different interpretations of the Upper Basin’s delivery obligations to Mexico under Article III(c) are well understood throughout the Basin. III(c) says that water for Mexico should be provided from “surplus”. If there is no surplus, the Upper and Lower Basins much each provide half the necessary water. But there has never been agreement on what that language means in practice. This unresolved uncertainty has enormous implications for how much water is available to each basin in the future.

The Lower Division States take the position that there’s no current “surplus,” as defined by Article III (c), thus the Upper Division States must deliver at Lee Ferry 50% of however much water is required to be delivered under the Treaty. The annual delivery is normally 1.5 maf/year, but under either the “extraordinary drought” provision of the Treaty, or Minutes, it could be less. In 2023, it was 1.4 maf.

The Lower Division States’ position would dictate an average annual delivery of 8.25 maf/year at Lee Ferry, 7.5 maf under Article III(d) + 750,000 af under Article III(c). The 8.25 maf includes an average contribution of 20,000 af/year from the Paria River and would be adjusted for the occasional annual delivery of less than 1.5 maf. Veterans of the negotiations that led to the 2007 Interim Guidelines will recall that Arizona’s Herb Guenther always brought with him to the meetings a posterboard sign with “8.25” written on it.

Going back to the 1970 decision by the Secretary of the Interior to set the “minimum objective release” from Glen Canyon Dam at 8.23 maf/year, the Upper Division States have consistently taken the position that their annual obligation Mexico has never been formally defined and, whatever it is, it is not 750,000 af/year, every year. While they vigorously complained, they never chose to formally challenge the issue in court or in Congress, perhaps because they concluded that they couldn’t show that any of their interests were injured. Today, based on post-2000 hydrology, that dynamic may have fundamentally changed.

The basic position of each basin has not changed. If anything, because the stakes are much higher, the positions have hardened. In a December 20, 2022, scoping letter to Reclamation, Arizona’s Tom Buschatzke, and Ted Cooke, wrote: “Article III(d) and (c) prohibits the Upper Division States from depleting the flow of the river at Lee Ferry below a rolling 10-year aggregate of 75 maf plus one-half of the Mexico delivery obligation. With reduced releases from Glen Canyon Dam potentially analyzed under the SEIS, if the 10-year rolling aggregate falls below the required aggregate volume, the Upper Division States could be subject to a “Compact call” that would require a reduction in consumptive use in the Upper Basin.  In footnote 1, they add “A “surplus” currently does not exist because natural flows in the Colorado River have not exceeded 16 maf in the past 10 years.”  In their August 15, 2023, scoping letter, the three Lower Division States write: “The Post-2026 EIS must analyze whether alternatives are consistent with the 1922 Colorado River Compact non-depletion obligations and delivery obligations to Mexico. Alternatives should include actions necessary to ensure compliance with such obligations.”

Eugene Clyde LaRue measuring the flow in Nankoweap Creek, 1923. Photo credit: USGS

The Upper Division States are equally adamant that because of overuse in the Lower Basin, they currently have no annual obligation to Mexico under Article III(c). Note that I used the term “Lower Basin” because under the 1922 Compact, the Lower Basin includes the upper Gila River in New Mexico, where uses are small, Kanab Creek in Utah and Arizona, again uses are small, and the Virgin River, shared by Nevada, Arizona, and Utah, where uses are not small. The Virgin River is the water supply for the rapidly growing St. George area.  As a state, Utah consumes the second largest amount of Lower Basin tributary water, about 150,000 af/year, albeit much less than Arizona.

In recent public presentations, Colorado Commissioner Becky Mitchell has stated that the Lower Basin’s total annual use, including tributaries and reservoir evaporation, were 10.5 maf in 2020, 10.8 maf in 2021, and 10.4 maf in 2022, far more than the Lower Basin’s compact apportionment (7.5 maf under Article III(a) plus 1.0 maf under Article III(b)). Their position is that the Lower Basin’s overuse is “surplus” water that must first be used to meet the 1944 Treaty obligations to Mexico before the Upper Division States have any obligation to Mexico, a position the Lower Division States do not agree with.

The situation is messy. As I explain below, Mitchell’s 10-plus million acre foot calculation is based on analysis that contains a hidden assumption about the correct way to measure water use, an assumption at odds with the method the Upper Basin has traditionally used to measure its own water use. But when one peels back the layers, it’s even messier. First, there is no agreement on whether the obligation of the Upper Division States to Mexico is calculated on an annual basis, a ten-year rolling aggregate basis, or something else (I’m in the something else camp). The predominant position the Upper Division States is, as mentioned in John’s comments, that the since the 1944 treaty provides for an annual delivery to Mexico (which can change), therefore, the obligation of the Upper Division States is determined annually. As can be seen by the language in the Arizona and Lower Division States letter, the Lower Basin states’ position is based on a ten-year rolling aggregate. The logic of this position is that the last sentence of Article III(c) states: “whenever necessary the States of the Upper Division shall deliver at Lee Ferry water to supply one-half of the deficiency so recognized in addition to that provided in paragraph (d).”  Paragraph (d) is a ten-year requirement; does it make sense to add an annual requirement to a ten-year requirement? Further, the data necessary to determine whether a deficiency exists (and thus the obligation of each basin) would not be available until well after the water year is over.

My reading of the reports of the compact commissioners, their Congressional testimony, and the minutes of both the 1922 and 1948 suggests a third possible alternative.  The negotiators of the 1922 Compact, the 1944 Treaty, and the 1948 Compact considered the surplus to be the difference between the average long-term natural flow of the river at the international boundary and 16 million acre-feet, the aggregate of the apportionments made by Articles III(a) and III(b). During the negotiations of the 1948 Compact, Colorado’s Royce Tipton and Arizona’s Charles Carson laid out the logic. Based on the comprehensive hydrologic analysis conducted by Reclamation (Appendix I of the 1947 Comprehensive Report), the estimated long-term natural flow below the confluence of the Colorado and Gila Rivers was 17.7 maf/year. Subtracting 16 maf left an average surplus of 1.7 maf, 1.5 maf for Mexico and about 200 kaf for surplus uses within the United States. Upper Division State officials argued that with this hydrology there was no deficiency. Colorado’s Tipton and Clifford Stone (its 1948 Compact Commissioner), however, did acknowledge that the location of the surplus was an important factor.

With their 1940s understanding of the river hydrology, the Upper Division States did not want the deficiency calculated either on an annual basis or a ten-year running average. They understood that in both cases, they would be required to deliver more water to Mexico than using the long-term average. Under an annual determination, there would be many years (~50%) when there was a deficiency. Under the ten-year rolling average, there would be long periods when it would be below 16 maf/year and there would be a deficiency (the 1930s drought period for example) but provided the long-term average was more than 17.5 maf/year, there would be no deficiency. Tipton also made the point that in the future, the construction of additional storage reservoirs (like Lake Powell) would effectively “equate” the river. Today’s problem with this approach is that in the 1940s, the basin’s water managers assumed a level of “stationarity” (future river flows can be predicted by what happened in the past) that because of climate change does not exist today.

Resource: Stationarity is dead: Whither water management?

An additional problem we have today is the calculation of the deficiency is based on the natural flow at the international border with Mexico, not Lee Ferry. Note that the Arizona letter states, “natural flows in the Colorado River have not exceeded 16 maf/year.” That statement is very likely true, but there are no data to back it up. Unlike Lee Ferry, there are no recent calculations of annual natural flows at the international border. There is no Colorado River system natural flow database. The existing database includes natural flows to Lee’s Ferry, but downstream to the Imperial Diversion Dam, Reclamation acknowledges that they have little confidence in these data and much of it is not based on reconstructed natural flows.  Importantly, the existing natural flow database does not include the Gila River system.

The last widely published estimate of natural flows at the international border was completed by the Bureau of Reclamation nearly eighty years ago (Appendix I). These data were used during the 1944 Treaty ratification hearings and, to a lesser extent, by the 1948 Compact negotiators. Appendix I shows an average natural flow at the border of 17.72 maf/year. At Lee Ferry, it was 16.41 maf/year (based on1898-1943). Assuming a similar relationship between the flows today, from 2000-2023 the estimated natural flow at the border, including the Gila, would be approximately 13.5 maf/year (12.44/16.41 x 17.72). Note, because of climate change, which appears to have a greater impact on the southern tributaries of the Colorado River system, the relationship may no longer be reasonable.

Gila River watershed. Graphic credit: Wikimedia

Updating the natural flow database to include the Gila River has been suggested by Upper Division State officials, but Arizona has historically objected. Clearly this would not be an easy task and there would be large uncertainties, especially estimating with any certainty natural losses on the Colorado River below Hoover Dam and on the Gila River from the Phoenix area to Yuma under today’s climatic conditions.

LOWER BASIN TRIBUTARY USE

The Gila River is also the central subject of John C.’s second comment that Arizona, California, and Nevada should be concerned that including mainstem consumptive uses, tributary consumptive uses (including those in Utah and New Mexico), reservoir evaporation, and maybe system losses, the Lower Basin total consumptive uses exceed its compact apportionment of 8.5 maf/year. Alternatively, Lower Basin tributary consumptive uses far exceed 1.0 million acre-feet – if one believes Article III(b) was intended to only cover Lower Basin tributaries.  The problem with this argument is that there is no 1922 Compact definition of “beneficial consumptive use” (the “commodity” the Compact apportions). This is especially important for the Lower Basin tributaries.

There are different interpretations among the states and between the basins of how “beneficial consumptive use” should be defined and therefore measured. Each has a strong legal argument in its favor. But their approaches result in vastly different numbers, and as my co-author John Fleck has written, “There’s not enough water for all the lawyers to be right.”

Article VI of 1948 Compact defines and provides a method measuring compact apportionments for the Upper Basin. The 1964 decree in Arizona v. California defines how to measure the mainstem apportionments made to the Lower Division States under the 1928 Boulder Canyon Project Act. Since the 1963 decision did not interpret the 1922 Compact and there is no Lower Basin Sub-Compact, there is no accepted or defined method for measuring 1922 Compact apportionments on the Lower Basin tributaries (and arguably the entire Lower Basin).  The methods used by the 1948 Compact and the 1964 Decree are very different. The 1964 Decree uses the concept of “diversions minus return flows.” It comes from the language of the Boulder Canyon Project Act. Stream losses and reservoir evaporation from Hoover Dam to the points of diversion are not considered a use, but rather a limitation on the available supply.

September 21, 1923, 9:00 a.m. — Colorado River at Lees Ferry. From right bank on line with Klohr’s house and gage house. Old “Dugway” or inclined gage shows to left of gage house. Gage height 11.05′, discharge 27,000 cfs. Lens 16, time =1/25, camera supported. Photo by G.C. Stevens of the USGS. Source: 1921-1937 Surface Water Records File, Colorado R. @ Lees Ferry, Laguna Niguel Federal Records Center, Accession No. 57-78-0006, Box 2 of 2 , Location No. MB053635.

The 1948 Compact approach for defining and measuring consumptive use under Article VI is based on what was referred to as the “stream depletion” theory. Consumptive uses for the Upper Basin and for the individual states are measured as the net impact of man-made depletions on the natural (AKA virgin) flow of the Colorado River at Lee Ferry using the “input-output” method. The 1948 Compact gives the UCRC the authority to change the method by unanimous approval. The UCRC has instructed its staff to identify an alternative to the input-output method, so this may happen soon.  Article VI was one of the most debated and carefully written articles in the 1948 Compact. The negotiators had a clear objective in mind. They wanted to carefully define how to measure compact apportionments so that water made available for consumption through “salvage by use” would not count as compact apportioned use.

The issue of salvaged water was a major dispute among the basin states in the 1940s and 1950s. Simply put, salvaged water is water made available for use by the reduction of natural losses caused by the development of the river. The best example of salvage by use is Arizona’s Gila River. As the Gila River and its two major tributaries, the Salt and Verde Rivers, leave the rim country upstream of Phoenix, they have a combined average natural flow of over 2.0 maf/year (2.3 according to the 1947 report). As the river flows to its confluence at Yuma, in its natural state it loses about 1.0 maf/per year. By diverting and using the entirety of Gila River’s waters upstream, these losses are eliminated. Thus, Arizona can consume a million af/year more water than what the Gila River contributes to the natural flow of the Colorado River system.  Under the “stream depletion” theory, which was favored by Arizona and the Upper Division States, Arizona is only charged for a million acre-feet of 1922 Compact apportionment. Under California’s “diversions minus return flows” theory, also favored by Nevada, all 2+ maf/year of Arizona’s Gila River consumptive use would be charged as 1922 Compact apportionment.

The Upper Basin adopted the stream depletion theory during an era when the states were competing for every acre-foot possible. They thought could benefit by 400,000 -600,000 af per year. Simply put, in years when the water was physically available, the Upper Basin could consume 7.9 – 8.1 maf/year while only depleting the natural flow of the river at Lee Ferry by 7.5 maf/year (their compact apportionment). The negotiators never contemplated that 75 years later, the water available to the Upper Basin would be far less than 7.5 maf.

During the negotiations of the 1948 Upper Basin Compact, the decision to use the stream depletion theory was thoroughly debated. Wyoming’s legal advisor, W. J. Wehrli, warned the other states that using this definition would benefit the Lower Basin far more than the Upper Basin. Additionally, he noted that it could reduce the amount of surplus water under Article III(c), potentially increasing the obligation of the Upper Division States to Mexico. Wyoming ultimately fell in line and agreed to the Article VI definition. During the Congressional debate over the authorization of the Central Arizona Project, Upper Division State officials (primarily Tipton and Stone) testified in favor of the stream depletion theory, arguing that the negotiators of the 1922 Compact intended this method to measure apportionments. Note, the compact does not include a definition of “beneficial consumptive use,” they made their case based on an analysis of the minutes and the use of the term “depleted” in Article III(d).

The structural deficit refers to the consumption by Lower Basin states of more water than enters Lake Mead each year. The deficit, which includes losses from evaporation, is estimated at 1.2 million acre-feet a year. (Image: Central Arizona Project circa 2019)

The Upper Division States make a rhetorically powerful public argument that in the face of climate change, overuse in the Lower Basin is the central problem in the Colorado River Basin that must be solved to reach a sustainable future where water use, and the available supply are in balance. The argument is that when mainstem uses, reservoir evaporation, system conveyance losses, and tributary consumptive uses (in Arizona, Nevada, New Mexico, and Utah) are added together, the Lower Basin’s total use exceeds ten maf/year, perhaps as high as eleven maf/year. The Lower Basin’s compact apportionment, however, is only 8.5 maf/year (perhaps 7.5 maf/year depending on how Article III(b) is interpreted), resulting in an overuse of at least 1.5 maf/year. Such an overuse has major policy implications:

  • If the Lower Basin is overusing its compact entitlement, why should the Upper Basin, which is using far less than its apportionment, reduce its uses to help bring the system into balance?
  • Should the Lower Basin’s overuse be considered “surplus” water under Article III(c)? If so, should this surplus water be delivered to Mexico before the Upper Division States have any obligation to deliver half of the deficiency to Mexico?
  • These two questions have implications for Mexico, if the Lower Basin is overusing its compact apportionment, why should Mexico reduce its annual use?

The problem with the Upper Basin’s argument is that it’s based on the diversions less return flow theory. If the Lower Basin’s uses are calculated based on the stream depletion theory – the methodology the Upper Basin adopted in its own 1948 Upper Basin Compact, uses may not be greater than 8.5 maf/year.

Stream DepletionDiversions less Return Flows
Mainstem uses (a)6.6 maf/year6.6 maf/year
Reservoir Evaporation (b)0.5 maf/year0.86 maf/year
System Losses (c)00.45 maf/year
Tributary Uses (d)1.2 maf/year2.2 maf/year
Total8.3 maf/year10.1 maf/year

Explanation:

a) Mainstem uses (deliveries from Hoover Dam) are very similar under both theories. Almost all mainstem uses are either fully consumptive or located low in the system. The average mainstem use by the Lower Division States over the last five years (2019-2023) is approximately 6.6 maf/year.

b) Under diversions less return flows the 0.86 maf/year is the average evaporation (2017-2021) from the December 2023 Reclamation study. Under the stream depletion theory, reservoir evaporation is calculated as surface evaporation less the natural losses in the inundation area that would have occurred had the reservoir not been built. This is how evaporation on Lake Powell is calculated. I estimated natural losses as .36 maf/year.

c) The 0.45 maf/year is from the December 2023 Reclamation study. Under the stream depletion theory, system losses are offset by salvaged water. As a practical matter, we have no idea how much salvaged water is currently generated on the mainstem below Hoover Dam, but we do know that the channel is much smaller today than it was before development. In 1945 during the Mexican Treaty ratification hearings, Colorado’s Royce Tipton estimated the number to be 400,000 af/year. I’ll assume they offset.

d)Under diversion less return flows, tributary uses are 2.2 maf/year, the latest data from the 2001-2005 Consumptive Uses and Losses and Report. Under the stream depletion theory, it’s reduced by 1.0 maf/year, the estimated salvage on the Gila River from the 1947 study. Because of climate change, losses today may be greater, but no data are available.

Thus, using the diversions less return flows theory, the Lower Basin is clearly using more than 8.5 maf/year, but under Upper Basin’s own stream depletion theory, it is not. Since the 1922 Compact neither defines nor prescribes a way to measure “beneficial consumptive use,” the basic question – “is the Lower Basin overusing its compact apportionment?” simply cannot be answered. [ed. emphasis mine]

These disputes also point to the fundamental flaw with the states’ talking point that the 1922 Compact, the 1948 Upper Basin Compact, and the Mexican Treaty will serve as the foundation of the post-2026 operating rules. There is no agreement on what they say or mean. As the states continue their discussions with the goal of agreeing on a state proposal, they need to consider addressing the disputed compact issues in a straight-forward manner. Leaving these critical uncertainties for future generations to handle (like we have in the past) is no longer possible and asking the Supreme Court for a resolution will likely make matters worse, not better.

Map credit: AGU

Pitkin County exploring concern that Shoshone deal could harm #RoaringForkRiver: Upper Fork ‘lives and dies’ on the Cameo call — @AspenJournalism #ColoradoRiver #COriver #aridification

The Shoshone hydropower plant in Glenwood Canyon has one of the oldest non-consumptive water rights on the main stem of the Colorado River and that right is in the process of being acquired by the Colorado River Water Conservation District. Pitkin County is exploring potential impacts the deal might create for the upper Roaring Fork River. CREDIT: BRENT GARDNER-SMITH/ASPEN JOURNALISM

Click the link to read the article on the Aspen Journalism website (Heather Sackett):

February 21, 2024

An historic deal to put a senior water right in the hands of the Colorado River Water Conservation District has been celebrated as a victory for the Western Slope. But Pitkin County officials say there’s a chance it could harm the upper Roaring Fork River.

Map of the Roaring Fork River drainage basin in western Colorado, USA. Made using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69290878

In December, the Glenwood Springs-based River District signed a deal with Xcel Energy to buy water rights associated with the Shoshone hydropower plant in Glenwood Canyon for $98.5 million. As some of the biggest and oldest non-consumptive water rights on the mainstem of the Colorado River, they ensure water keeps flowing west to the benefit of downstream users because the water runs through Shoshone’s power-generating turbines and then returns to the river.

Pitkin County’s concerns have to do with the complex interaction of the Shoshone water rights with another set of big downstream water rights known as Cameo, which are made up of Grand Valley irrigation water rights. These two senior water rights have the ability to command the flow of the Colorado River and force Front Range cities that send water from the Colorado’s headwaters across the Continental Divide to shut their diversions off.

Under Colorado’s cornerstone of water law, known as prior appropriation, oldest rights get first use of the water. When a senior water right isn’t receiving its full amount, it can place a “call.” When Shoshone, which dates to 1902, places a call, transmountain diverters like Denver Water and Northern Water have to shut off. When Cameo places a call, the Twin Lakes Reservoir and Canal Co., which takes water from the top of the Roaring Fork basin to Colorado Springs, Pueblo and Aurora, has to shut off because its 1930s water rights are junior to Cameo’s 1912 water rights.

About 600 cfs of water from the Roaring Fork River basin flowing out of the east end of the Twin Lakes Independence Pass Tunnel on June 7, 2017. Photo: Brent Gardner-Smith/Aspen Journalism

Pitkin County’s concern is that with Shoshone under new ownership — and the proposed addition of an instream flow use for the water along with hydropower — the call for the water through Glenwood Canyon could be on more often, which might delay or reduce the need for the Cameo call. Aspenites like to see the Cameo call come on because it forces the Twin Lakes diversion to shut off, which means more water flowing down the Roaring Fork, typically during a time of year in late summer and early fall when streamflows are running low and river health is suffering.

“The upper Roaring Fork lives and dies on the Cameo call because that’s what curtails Twin Lakes,” Pitkin County Attorney John Ely, who sits on the River District’s board, said in an interview with Aspen Journalism. “If the Cameo call is changed through administration of the river because there is a change in the flow going to satisfy Shoshone, then that could delay Cameo, which would prolong the operation at Twin Lakes and deplete the upper Fork.”

Pitkin County in November hired Golden-based engineering firm Martin and Wood Water Consultants to do a technical analysis and modeling of the Colorado and Roaring Fork rivers. They bill in monthly installments and have charged Pitkin County $6,600 so far, according to Ely; the firm is expected to produce a report after they finish studying the issue, although Ely did not say when that would be.

Graphic credit: Laurine Lassalle/Aspen Journalism

Health of Roaring Fork dependent on Cameo

The River District has said the goal of owning the Shoshone right is to preserve the status quo and keep water flowing west the same way it always has. Xcel representatives have said they intend to keep operating the plant for hydropower, but the facility is old, frequently offline for repairs and located in a treacherous area of Glenwood Canyon.

Ely isn’t so sure that nothing would change. If the Colorado Water Conservation Board (CWCB) was to place a Shoshone instream flow call, it could alter the way the system has historically operated, he said. The CWCB is the only entity allowed to hold an instream flow water right, which is intended to preserve the natural environment to a reasonable degree.

“If it wasn’t going to change the administration of the river, why would anyone pay $98 million for it? … The potential for injury (to the Roaring Fork) is most definitely there,” he said.

River District General Counsel Peter Fleming said the organization is working with Pitkin County to look into the issue.

“The question has arisen and we’re working in good faith with the county to identify and resolve any concerns,” he said. “We’re going to determine whether there is an actual issue that we can accommodate.”

The Cameo call comes on most years in late summer. But it occurs for more days in dry years than wet ones. According to a database maintained by the Colorado Division of Water Resources, in 2019 and 2023 — both years with above-average snowpack and runoff — the Cameo call was on for 22 and 24 days, respectively. In 2020 and 2021 — two back-to-back below-average years — Cameo called for 88 and 75 days, respectively.

The health of the upper Roaring Fork may be more dependent on the Cameo call in drought years.

Wendy Huber is board chair of Pitkin County Healthy Rivers, a taxpayer-funded organization focused on maintaining and improving water quality and quantity in the Roaring Fork watershed that doles out grants and advises the board of county commissioners. She said Healthy Rivers needs more information from engineers about the impacts from any changes to Shoshone on the Cameo call.

“The Cameo call may allow more water to remain in the Roaring Fork to satisfy the call,” Huber said. “We need to understand the potential impact on quantity of water in our Roaring Fork Valley rivers, especially the Roaring Fork and Crystal rivers.”

Ely said he is optimistic Pitkin County will reach a resolution with the River District, at which point the county would be in a position to support the Shoshone permanency campaign. The River District has committed $20 million from its own pocket, and so far has secured $20 million in funding from the CWCB and $2 million from Grand Valley domestic water provider Ute Water Conservancy District toward purchasing the Shoshone rights. It is in the process of seeking funding from other entities in its 15-county district.

“Water is just simply too scarce a resource to not be mindful that you must protect your interests,” Ely said. “We’re not looking to get in the way of Eagle and Garfield and Mesa counties protecting themselves, but we don’t want to sacrifice our river for them to be able to do so.”

This story ran in the Feb. 22 edition of the Glenwood Springs Post-Independent.

Map of the Colorado River drainage basin, created using USGS data. By Shannon1 Creative Commons Attribution-Share Alike 4.0

Ute Water kicks in $2 million for Shoshone water rights purchase — The #GrandJunction Daily Sentinel #ColoradoRiver #COriver #aridfication

Shoshone Hydroelectric Plant back in the days before I-70 via Aspen Journalism

Click the link to read the article on The Grand Junction Daily Sentinel website (Dennis Webb). Here’s an excerpt:

February 16, 2024

A regional effort to purchase major Colorado River water rights in Glenwood Canyon gained major Western Slope support this week when the Ute Water Conservancy District pitched in $2 million toward the cause. The Mesa County entity’s board unanimously approved the contribution on Wednesday. An effort being led by the Colorado River District is seeking to buy water rights associated with the Shoshone hydroelectric power plant in Glenwood Canyon from Xcel Energy for $98.5 million, plus $500,000 to cover Xcel’s transaction costs. The rights include a right to flows of 1,250 cubic feet per second that dates back to 1902, along with a second, 158-cfs right that was appropriated in 1929…

The purchase is intended to ensure the flows continue even if the plant ever closes, through reaching an agreement with the state and pursuing a water court decree that would change the rights so they are not just for hydropower production but are instream flow rights would also ensure the flows continue.

The river district has committed $20 million itself for the purchase, and the Colorado Water Conservation Board recently supported pitching in $20 million in state funds, contingent on approval by the state legislature. The river district also has said it hopes to secure $49 million in federal funding and $10 million from West Slope governments and water entities.

The #BlueRiver Integrated Water Management Plan is live — Blue River Watershed Group #ColoradoRiver #COriver #aridification

Map of the Blue River drainage basin in Colorado, USA. Made using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69327693

Click the link to go to the Blue River Watershed Group website to access the plan:

BRWG has partnered with Trout Unlimited to create an Integrated Water Management Plan (IWMP) for the Blue River Watershed, that will provide a comprehensive roadmap for future water use, restoration projects, and other solutions to the issues that currently threaten the health of the watershed. The IWMP will guide the strategic direction of BRWG for the next several years through ongoing scientific research and resource evaluation, planning of restoration projects and acquiring funds to sustain those projects, implementation of projects that have secured funding as well as evaluating and maintaining completed projects.

A Price for the Priceless: How do we value #Colorado’s water? — Fresh Water News

A headgate on an irrigation ditch on Maroon Creek, a tributary of the Roaring Fork River. Photo credit: Aspen Journalism/Brent Gardner-Smith

Click the link to read the article on the Water Education Colorado website (Nelson Harvey):

You might call it the great economic riddle of our time: It sustains human life, lubricates the entire economy and has no known substitute, yet a month’s supply can be delivered to your home for less than the cost of cable TV or cell phone service. It belongs to the public but the right to use it is bought and sold, and changing that use requires a pricey court approval process. It supports kayakers and anglers, trout and sparrows, and all the ecosystems in between, yet those benefits are rarely reflected in its cost. It is cheap, and yet it is priceless. What is it?

If you’re reading [Headwaters] magazine, you already know that the answer is water, and you already know that water is invaluable. What you may not know is that water’s price, according to many economists, comes nowhere near to reflecting its true value, and that blunt economic fact has consequences for the long-term sustainability of both our water resources and our water systems.

Aligning water’s price with its value is much harder than it seems. That’s because water is traded and regulated in ways that reflect its unique and irreplaceable role in our economy. Depending on who you ask, water is a private commodity or a public good, an economic input or a human right.

These varying roles affect the accuracy of water prices, and the freedom—or lack thereof—of water markets. Some examples: In Colorado, many water utilities are prevented by their charters from charging more than they need to cover their costs. This keeps water rates affordable but also prevents providers from charging customers for the current market value of their water, also called the “scarcity value,” to encourage conservation. Legal restrictions on water transfers—in place to protect other water users—make those transfers complicated and expensive, slowing the flow of water from farms to cities and helping to preserve the gap between agricultural and municipal water prices. At the same time, many non-market costs of water transfers or appropriations—“externalities” like the open space, wildlife habitat and fishing grounds lost when farmers sell their water rights to a city or a new water right is appropriated, further depleting a stream—are not typically paid for by the buyer or the seller.

Ignoring the full cost of water—and the non-market values that water provides—saves money in the short term by keeping water rates low. In the long run, however, it could prove both financially and culturally expensive. Over time, wasteful use may hasten the need for costly new water projects, and public benefits like wildlife habitat and open space are less likely to be preserved if they aren’t factored into the price of water transfers. Given the stakes, how can we value water more accurately, while preserving the legal framework that protects water users and the environment?

Supply and demand, within limits

When utilities, ditch companies and irrigation districts buy water rights to serve their populations, the price of those rights is determined in part by the basic interplay of supply—what the water costs to deliver—and demand—what it’s worth to buyers. Brett Bovee, intermountain regional director for the consulting firm WestWater Research of Fort Collins, helps clients value water rights for purchase or sale. He considers factors like a water right’s source, location, current use, historical buyers and sellers, ease of storage, and seniority, since older rights are more dependably fulfilled than those appropriated more recently.

Bovee might compare a water right to a handful of others with similar characteristics to arrive at a reasonable price, or, if the water is agricultural, he might use a technique called the income approach, calculating the yields that a farmer could get irrigating with the water compared to dryland farming yields. (A slight variation is comparing the sale price of dry farm ground to that of irrigated land nearby, then using the difference to infer a water right’s value). A final technique, the replacement cost approach, involves calculating the cost of the next-most expensive water supply option and then advising clients to pay just less than that.

“Usually the replacement cost sets the ceiling, the income approach sets the floor, and the market price is somewhere between those two,” Bovee says. “The willing seller must make more off a water transaction than he would in farming, and the willing buyer is only going to buy water if it is cheaper than alternative sources.”

Brett Bovee. Photo credit: Westwater Research

Yet the economic playing field is not completely level where water is concerned, as evidenced by the vast and enduring price differences between agricultural and municipal water. As University of Arizona law professor Robert Glennon and his co-authors point out in the 2014 paper “Shopping for Water: How the Market Can Mitigate Water Shortages in the American West,” agricultural users in many parts of the West may pay just a few cents for a thousand gallons of water, while urban users pay $1 to $3 for the same amount. That’s partly because, in a strictly financial sense, urban users can earn more money with the water they consume: If you ignore the vital non-market values of agriculture like open space, wildlife habitat and food security, urban activities like manufacturing frequently generate more money per acre-foot of water than farming does. Used to grow lettuce in Yuma, Arizona, Glennon writes, an acre-foot of water might generate $6,000. Used to make microchips in California’s Silicon Valley, it would generate $13 million.

The price disparity between agricultural and municipal water is further explained by higher treatment and conveyance costs for urban water, from the chemicals that disinfect drinking water to the pumps that keep it pressurized and ready to flow from the tap. “If farmers needed really clean, pressurized water at their farm headgate on demand, the price between agricultural and municipal water may not be all that different,” Bovee says.

Grand River Ditch July 2016. Photo credit Greg Hobbs.

Agricultural water users who inherit their land also benefit from the investments their ancestors made in ditch and reservoir systems originally constructed to put the water to beneficial use. Today, they pay only the water assessments necessary to maintain or improve these systems or to make the occasional legal filings. When they sell their shares in their infrastructure or water rights, they earn the appreciated value of both, which can be substantial in areas like Colorado’s Front Range where a booming residential real estate market has kept water demand high.

First water through the Adams Tunnel. Photo credit Northern Water.

Finally, federally funded irrigation projects provided a subsidy to early agricultural water users: Many of the West’s large water diversions were paid for with federal dollars between the 1930s and the 1970s. Although those federal outlays were partly recouped through a combination of cost sharing from local governments and revenues from projects’ hydroelectric features, the federal government never required full reimbursement from water users. Examples include the Colorado-Big Thompson Project, authorized by Congress during the Great Depression to provide a supplementary source of water to farmers and cities in northern Colorado, as well as earlier Western Slope projects like the Uncompahgre Project and the Grand Valley Project. “Recipients of irrigation water from federal projects will have repaid, on average, about U.S. $0.10 on each dollar of construction cost,” writes University of California, Berkeley economist W.M. Hanemann In his 2005 paper “The Economic Conception of Water.” Today, federal funds are largely unavailable to help finance water supply infrastructure.

Although they remain much higher than agricultural water prices, municipal water rates are hardly exempt from market manipulation, and for good reasons. Because water is widely considered a basic necessity for human life and economic activity, many Colorado utilities are public entities whose rates are regulated by local governments or appointed boards, and even the rates of private, investor-owned utilities are limited by the Colorado Public Utility Commission.  Many municipal utilities set their rates through “cost-of-service” pricing, which doesn’t account for the value of water itself but factors in only what it costs to run the utility—energy, water treatment chemicals, office staff—plus maintain financial reserves, make debt service payments, and repair aging pipes, tanks, reservoirs and other infrastructure. A growing number of utilities also employ “increasing block rate” pricing to keep everyday water use affordable while penalizing higher water users to encourage conservation. Yet their rates include little or no charge for water’s replacement cost or “scarcity value:” what it would cost to obtain their water on the open market today, or what they could earn by selling their water and using the proceeds to pay off debt or meet other obligations.

“For a farmer to keep a tractor, they have to be earning more by keeping it than they could make by selling it,” says Chris Goemans, an associate professor of economics at Colorado State University (CSU) who specializes in water issues. “For water rights portfolios, there is no charge to households to reflect the fact that the water could go somewhere else and earn more money for the utility.”

Failing to account for this opportunity cost encourages customers to use their water for purposes worth less to them than the cost of bringing that water to the tap, whether that’s watering the lawn or filling the swimming pool. That’s highly inefficient from an economist’s point of view. “You don’t want people using water that costs $10 per gallon to produce on applications for which they place a value of a dollar or two,” says Chuck Howe, a professor emeritus of economics at the University of Colorado, Boulder. “If the price to the consumer doesn’t cover all the costs of production, then individual customers will apply water to uses that are, at the margin, worth less than the costs imposed on society.”

Boulder’s Avery Brewing Company is one among 230-plus Colorado craft and micro breweries that have combined water with barley, hops and other specialty ingredients to establish a nationally recognized market for beer enthusiasts. Photo courtesy of Avery Brewing Company

Artificially cheap water saves customers money today, but in the long run will prove expensive as utilities are forced to meet growing demands by acquiring expensive new water rights or building new infrastructure. In a 2013 analysis, city staff in Westminster, Colorado, calculated that water rates would be 135 percent higher and water tap fees 99 percent higher if per-capita water demand in the city had not fallen by 21 percent since 1980. That declining consumption—driven by a combination of utility-sponsored conservation programs, conservation-oriented increasing block rate water pricing and stricter national plumbing codes—saved the city over $5.9 million on water and wastewater treatment, new water rights, and loan interest payments, which would have been passed along to residents in the form of higher rates and tap fees. Even though water rates have risen in Westminster since 1980, in part to compensate for declines in per-capita consumption, they have risen much less than they would have if per-capita consumption had stayed flat as the population grew.

Howe believes that charging customers for the scarcity value of their water could have a similarly virtuous effect on consumption—and thus on water rates—over the long haul. In an unpublished paper co-written with water attorney Peter Nichols of the Boulder firm Berg Hill Greenleaf Ruscitti LLP, Howe argues that utilities could encourage conservation by charging customers more for each 1,000 gallons of water they use, then refunding any resulting profits by reducing the fixed monthly service charges that appear on monthly water bills. By increasing the price of each 1,000 gallons of water by just $1.50, Howe and Nichols surmise, the City of Boulder could earn $20 million per year, a sum equivalent to 5 percent of its $400 million water rights portfolio. This would encourage conservation without harming ratepayers’ overall bottom lines, since higher volumetric usage fees would be offset by reductions in fixed service charges.

Love thy neighbor: Legal restrictions on water transfers

Despite the limits on what municipal utilities can charge, the gap between urban and agricultural water prices persists. That’s partly because significant legal barriers discourage those who get their water cheaply—farmers—from selling it to the cities who will pay dearly for it. Those barriers serve noble goals: Because water, unlike other commodities like land or electricity, is often used several times in succession within the same river basin, many users depend on the reliable timing and amount of return flows from their neighbors upstream. To protect those flows, legal restrictions, such as the “no harm to juniors” rule, prevent anyone who moves their water or changes its use from impacting other water users. Colorado water courts employ several other principles in regulating water trades: The beneficial use requirement is intended to discourage waste and requires water to be put to beneficial uses approved by the legislature or the courts or else abandoned, and the anti-speculation doctrine mandates that anyone changing their water use show precisely its new use, location and amount, to prevent speculators from buying water and simply holding it, unused, until prices rise.

Water courts also limit the salable portion of a water right to its “historical consumptive use,” the average amount actually absorbed by crops, retained by people and lawns, or used up by industrial processes over the water right’s history. This prevents farmers from harming other water users by selling water they no longer have to divert as a result of improving their irrigation efficiency, provided they leave irrigated acreage and consumptive use unchanged. Before the efficiency improvements, the unused portion of the water diverted and applied had served other users in the form of return flows, so Colorado law protects those historical return flows for appropriation by other users after efficiency improvements are made.

On July 7, 2020, we closed our headgate that takes water from the Little Cimarron for irrigation. The water in the above photo will now bypass our headgate and return to the river. Photo via the Colorado Water Trust.

Taken together, these restrictions discourage water from simply flowing to the highest bidder. They make the process of transferring water rights time consuming and expensive, since detailed engineering studies and costly legal filings are necessary to prevent other water users from being injured without compensation. And yet, examples abound of Colorado water law flexing to accommodate changing state priorities. The nonprofit Colorado Water Trust and the Colorado Water Conservation Board (CWCB)—the only entity in the state that can hold an instream flow water right—are now seeking water court approval for the state’s first permanent “split-season” water right on the Little Cimarron River in Gunnison County. The right, acquired by the Colorado Water Trust, will permit the same water to be used for agricultural irrigation in the early summer and then for instream flows that benefit fish in the fall. Another example: Under a state law passed in 2013, farmers and municipal water providers can now enter into so-called “interruptible supply agreements” three out of every 10 years without the approval of a water court. In this arrangement, farmers fallow some of their land or reduce irrigation and then, with the blessing of the State Engineer, convey the freed-up water to cities in exchange for short-term lease payments. One such arrangement, the Arkansas Valley Super Ditch, is partway through a three-year pilot project that began in spring 2015 when irrigators on the Catlin Canal east of Pueblo leased 500 acre-feet of water to the cities of Fowler, Fountain and Security.

“It went so smoothly the first year that I don’t think we want to mess it up by changing anything,” says John Schweizer, president of the Lower Arkansas Valley Super Ditch Company and the Catlin Canal Company. Because agricultural commodity prices were low in 2015, Schweizer says, the farmers who participated earned at least twice as much fallowing land and leasing water as they would have growing corn, wheat or alfalfa on the same acreage. And they still kept at least 70 percent of their water rights in agricultural production, as required by law. Even though there are two years left in the pilot project, Schweizer says, “The City of Fountain is already talking about coming back and negotiating a longer term lease, which could mean bringing more farmers into the program.”

Ideally, these alternative transfer methods (ATMs) could give cities reliable sources of water in dry years without requiring the “buy and dry” of agricultural lands. Yet short-term leases are a relatively new concept, and because urban water providers must plan for a reliable, long-term supply they often prefer to purchase agricultural water outright. Some urban utilities then lease the water back to farmers until they need it, giving them flexibility in deciding when to begin the sometimes long and arduous process of filing for a change of use in water court.

“If you are a water [utility] manager, when you provide a water tap to a developer you are promising them water. Short-term leases are just not reliable enough right now to fulfill that promise,” says Goemans, at least not for a city’s entire water supply.

Still, reducing regulatory barriers to water leasing is likely to make it more common over time. In the South Platte River Basin, where the Colorado-Big Thompson (C-BT) Project diverts water from the upper Colorado River, owners of contracts for C-BT water are only required to obtain the blessing of the Northern Colorado Water Conservancy District board, rather than a water court, before selling or leasing their water interests, and a robust leasing market has materialized there.

According to a 2016 WestWater Research report, leases have accounted for about 80 percent of all water trades in the South Platte Basin in recent years, and most transactions have involved farmers leasing their water to cities. The value of this streamlined process is also reflected in the sale price of C-BT units—unlike a lease, a sale gives a buyer rights to the unit in perpetuity. In 2015, C-BT units changed hands 67 times and fetched an average sale price of $36,300 per acre-foot—by the second quarter of 2016 the price was above $40,000. Meanwhile area ditch shares, whose transfer requires water court approval, were traded just 23 times for an average price of $13,800 per acre-foot.

From “The Stages of Cannabis Growth“. Photo credit: Clean Leaf Air Filtration Systems
Pricing the priceless: The non-market value of water

The market for C-BT units is a compelling example of what freer water trading might look like, yet several factors make it unlikely that such a market could be replicated across Colorado. Under a 1938 contract between Northern Water and the U.S. Bureau of Reclamation, all contracts for C-BT water must be exercised within the boundaries of Northern Water’s service area. Units of C-BT water can only be used once before being allowed to flow down the lower South Platte River between Greeley and the Nebraska border, for the benefit of irrigators there. And yet, irrigators on the lower river have no legal right to claim injury if the lease or sale of C-BT units affects the return flows they rely on, since the prior appropriation doctrine—including the no-harm-to-juniors rule—applies only to native flows within a river basin, not to transbasin diversion water. This minimizes objections when C-BT units are leased or sold.

Colorado-Big Thompson Project Map via Northern Water

Leaving aside these complicated machinations, there is a simpler reason why most of Colorado’s water sales and leases are still regulated by water courts: Legal safeguards like the no-harm-to-juniors rule play an important role in limiting harm to third parties or the environment when water is moved. They also highlight water’s role as both a private good and a public resource with important environmental and cultural values.

Economists have devised a suite of techniques to translate those “non-market” values into financial terms so that they can be factored into cost-benefit analyses of water projects. Perhaps the most prominent technique is “contingent valuation,” where economists survey water users to gauge their financial willingness to pay for environmental benefits or willingness to accept environmental harms.

Big Wood Falls photo via American Whitewater (2011)

People value water’s role in the environment for a wide variety of reasons: “Use value” reflects the benefit of using a waterway for kayaking, rafting or swimming; “existence value” measures the well-being gained from simply knowing that a river exists; and “bequest value” shows the worth of knowing that an environmental good will be preserved and passed down to future generations. There is also “intrinsic value”—the notion that other water-dependent species should be allowed to exist regardless of their value to humans.

Because some of these values have an emotional component, it can be tough to give them the same weight as purely financial considerations, and many cost-benefit analyses reflect this problem. In 2011, for instance, the Colorado Department of Public Health and the Environment was considering additional limits on releases of phosphorous and nitrogen from wastewater treatment plants to comply with enforcement of the federal Clean Water Act by the Environmental Protection Agency. A state-commissioned study by the consulting firm CDM Smith weighed the costs of those new regulations—new equipment and more intensive wastewater treatment and monitoring—against benefits like reduced spending on drinking water treatment, better-tasting and better-looking drinking water, improved ecological function in rivers and streams, and increased recreation. The study found that the regulations would yield just $0.79 worth of benefits for every $1.00 spent to implement them. Yet it relied on rough estimates—derived from previous economic studies—of the financial value that people place on environmental benefits. And it did not weigh qualitative benefits like existence and bequest value, despite the fact that these values often account for half of people’s willingness to pay for environmental benefits, according to CSU environmental economics professor John Loomis.

Colorado transmountain diversions via the State Engineer’s office

Those same omissions have characterized, and potentially marred, other studies. A 2009 study by the Front Range Water Council, a group of Front Range water providers that has advocated for new transbasin diversions from Colorado’s Western Slope, found that the Front Range withdraws 19.4 percent of the state’s water but generates 80 to 86 percent of the state’s economic activity, while western Colorado withdraws 41 percent of the state’s water but comprises just 10 percent of the state’s economy. By that logic, the Front Range produces about $132,268 in economic output per acre-foot of water used, compared to just $7,200 per acre-foot on the Western Slope. Yet those figures fail to account for the economic costs that diverting water to the Front Range imposes on the Western Slope, along with the financial benefits of things like tourism and recreation, which rely on keeping western Colorado water in the stream. The Northwest Colorado Council of Governments (NWCCOG), a coalition of Western Slope municipal governments whose members generally oppose new transbasin diversions, attempted to address these omissions with its own 2012 study: Water and its Relationship to the Economies of the Headwaters Counties.

“We have struggled to convey how important having water in the river is to the economy in the headwaters region, especially in the summer,” says Torie Jarvis, co-director of the Water Quality and Quantity Committee at NWCCOG. “That study was meant to point out that there were values that studies like the Front Range Water Council’s were not accounting for.”

Fraser River at gage below Winter Park ski area. Photo credit: Colorado Water Trust

Some of these values, and the economic implications of protecting them, are relatively easy to quantify: The town of Winter Park, for instance, is forced to treat its wastewater to a higher standard because 65 percent of the Fraser River that once flowed through town is diverted to the Front Range, making wastewater more difficult to dilute. “We have seen an impact on the cost of wastewater treatment year-round due to the lack of dilution flows,” says Bruce Hutchins, manager of the Grand County Water and Sanitation District 1. Faced with ongoing transbasin diversions, Winter Park town leaders have also opted to curtail the town’s development to keep at least 10 cubic feet per second of water in the Fraser River at all times. That has clear economic consequences: At buildout, the town could accommodate about 9,300 single-family housing units if officials were willing to dry up the river to provide them with water. Instead, the town has capped the number of water taps it will dispense to allow for just 8,300 single-family units in order to maintain river flows.

Colorado fly fishing, whitewater and other water-related recreational pursuits contribute significantly to Colorado’s $34.5 billion recreational economy. Photo courtesy of the Winter Park Convention and Visitors Bureau

“It’s a bit backwards from the way that other communities have done it,” says Winter Park community development director James Shockey. “We’ve put the river first, and then looked at how much we can develop from there.”

Other values compromised by transbasin diversions, like the potential effect of changes in water use on tourism, require non-market valuation in order to be expressed financially. In a March 2003 study, CSU economists Adam Orens and Andrew Seidl surveyed winter tourists in the towns of Gunnison and Crested Butte to see how changes in the area’s open space ranch landscape would affect their decision to vacation there. More than half of those surveyed said they would reconsider vacationing in the area if just 25 percent of the existing ranchland were converted to second homes or other uses. If all of the ranchland were converted, the researchers concluded that tourism in the area could drop by as much as 40 percent.

Contingent valuation surveys have also shed light on the value of water left in rivers for recreation, wildlife habitat and scenic views, which sometimes exceeds the economic benefit of diverting that same water to farms or cities. In a 2008 study, CSU Economist John Loomis surveyed a random sampling of Fort Collins residents and found that they were willing to pay an average of $352 per year to keep peak spring and summer flows in the Cache La Poudre River rather than letting agricultural and municipal users deplete them. “It appears the value of these instream flows to Fort Collins residents is of the same magnitude as the market value of the water in alternative uses,” like irrigation and municipal use, Loomis concluded. In Colorado today, there are two legal  mechanisms that Fort Collins residents could use to keep that water in the stream, and both involve the prior appropriation system. In theory, they could convince local or state government to acquire a water right on the Poudre from a willing farmer or utility, then convert it to an instream flow right (held by the CWCB) or a recreational in-channel diversion right (held by a local government) to keep its recreational and wildlife benefits intact. Such benefits are protected in some states by the public trust doctrine, a legal concept which holds that certain resources should be held in trust by the government for public benefit. Yet that concept holds no legal sway in Colorado.

“We are not a public trust doctrine state,” says retired Colorado Supreme Court Justice Greg Hobbs. “We are a prior appropriation state with a market. The Constitution provides that the water is owned by the public and is dedicated to the use of the people of the state subject to appropriation. Therefore, the public values protected by the constitution consist of the beneficial uses made by water rights owners.”

The graphic shows the existing dam and water level and how high the new dam will rise above the current water level. Image credit: Denver Water.
Wading through no man’s land: Accounting for social costs

There are some good examples of water users paying for the public and private costs of their diversions. Under a 2012 pact called the Colorado River Cooperative Agreement between Denver Water and 17 Western Slope entities, the Front Range utility won support for its efforts to enlarge Gross Reservoir north of Boulder in exchange for helping to fund dozens of river improvements on the Western Slope. Among them: channel maintenance and habitat improvements on the Fraser River, a catchment basin that reduces sediment in the Fraser and cuts water treatment costs for Winter Park, and a whitewater park in the Colorado River at the mouth of Gore Canyon near Kremmling.

Yet some observers argue that there should be a more formalized way to charge for the public costs of diverting water. Aside from mitigation requirements imposed on water projects by state and federal environmental laws, the existing legal mechanisms for protecting public values—instream flow rights and recreational in-channel diversion (RICD) rights—were introduced into Colorado water law relatively recently. (The legislature authorized the first instream flows in 1973 and RICDs in 2001.) That means that many instream flow rights have junior priorities and cannot be exercised when more senior rights are diverting, which can render them ineffective during dry parts of the year. As an added way to safeguard water-related public goods, the CSU economist Chris Goemans floats the idea of a public fund—perhaps financed by a tax on the buy and dry of agricultural lands—dedicated to preserving water-related public goods like open space and wildlife habitat.

“There are social values of water use that are not factored into the transaction when a farmer sells their water to a city,” says Bovee. “A farmer cannot charge a developer twice as much simply because his water is irrigating nice open land that will dry up once the water is gone. The developer will not pay extra to compensate for the loss of that public good.”

In extreme cases, in the absence of state intervention, the social costs of water diversions can undercut the economy of an entire region. A well-known example of this is southeastern Colorado’s Crowley County, where droves of farmers sold their water rights to the growing cities of Aurora, Colorado Springs and Pueblo between the 1960s and the 1980s, then took the profits, packed up and moved away. Because few of the proceeds from those water sales were reinvested in the community and the region lacked an alternative economy to fall back on, widespread unemployment ensued that persists to this day.

Photo of Crowley County by Jennifer Goodland

“If you looked at this transaction from a statewide perspective, it was a net benefit,” Bovee points out. “The revenue from moving that water to the Denver Metro area was greater than the lost income from farming in the county. But there was a spatial problem—Crowley County did not have a second and third economy to rely upon, so it was economically devastating, and there was huge poverty and social fallout. Open markets see nothing wrong with that transaction. But the state has to look out for the health of its rural populations and mitigate the downside in some way.”

In $100 million #ColoradoRiver deal, water and power collide — KUNC #COriver #aridification

Shoshone Falls hydroelectric generation station via USGenWeb

Click the link to read the article on the KUNC website (Alex Hager). here’s an excerpt:

February 9, 2024

The purchase [of the Shoshone Power Plant non-consumptive use hydropower rights] represents the culmination of a decades-long effort to keep Shoshone’s water on the west side of Colorado’s mountains, settling the region’s long-held anxieties over competition with the water needs of the Front Range, where fast-growing cities and suburbs around Denver need more water to keep pace with development. Even though the Shoshone water rights carry an eight-figure price tag, the new owners will leave the river virtually unchanged. The river district will buy access to Shoshone’s water from the plant operator, Xcel Energy, and lease it back as long as Xcel wants to keep producing hydropower. The water right is considered “non-consumptive,” meaning every drop that enters the power plant is returned to the river. The river district wants to keep it that way as long as they can and ensure the water that flows into the hydroelectric plant also flows downstream to farmers, fish and homes.

The river district is rallying the $98.5 million sum from local, state and federal agencies. The district has secured $40 million already, with deals in the works for the remainder. It’s rare for a big-money water deal to find this kind of broad approval from a diverse group of water users. But the acquisition is seen as pivotal for a wide swath of Colorado, and has been co-signed by farmers, environmental groups and local governments…Shoshone’s water right is one of the oldest and biggest in the state, giving it preemptive power over many other rights in Colorado. Even in dry times, when cities and farms in other parts of the state feel the sting of water shortages, the Shoshone Hydroelectric Plant can send water through its turbines. And when that water exits the turbines and re-enters the Colorado River, it keeps flowing for myriad users downstream…

The hydro plant itself produces relatively little energy. Its 15 megawatt capacity is only a small fraction of Xcel Energy’s total Colorado output of 13,100 megawatts. Shoshone’s capacity is enough to serve about 15,000 customers, which is less than a quarter of the population of Garfield County, where the plant is located. But the power plant has held legal access to water from the Colorado River since 1902, and can claim seniority over the vast majority of other water owners in the state. That kind of seniority means power and certainty for whoever owns it. And that has raised the hackles of Western Colorado water users, who worry that water users in other parts of Colorado might be interested in buying Shoshone’s water right…The Colorado River District’s plans to buy Shoshone’s water have rallied widespread support, largely because of the transfer’s widespread benefits. Perhaps no constituency will benefit from the move as much as the one that lives in the river itself…Standing on the banks of the Colorado River in Grand Junction, [Dale] Ryden looked out over a murky, meandering stretch of water. It’s part of the “15 mile reach,” a critical section of the river about 80 miles west of the Shoshone plant. The reach is filled partly by water exiting Shoshone’s turbines. Ryden explained that this section of river is home to a variety of species, some of which are endangered, and some which are found nowhere else on earth besides the upper portions of the Colorado River. Those species – with funky names like the flannelmouth sucker and the humpback chub – rely on this stretch of river for virtually every aspect of life.

This map shows the 15-mile reach of the Colorado River near Grand Junction, home to four species of endangered fish. Map credit: CWCB

Cost to water crops could nearly quadruple as #SanLuisValley fends off #ClimateChange, fights with #Texas and #NewMexico — Fresh Water News #RioGrande

Sunrise March 16, 2022 San Luis Valley with Mount Blanca in the distance. Photo credit: Chris Lopez/Alamosa Citizen

Click the link to read the article on the Water Education Colorado website (Jerd Smith):

Hundreds of growers in Colorado’s San Luis Valley could see their water costs nearly quadruple under a new plan designed to slash agricultural water use in the drought-strapped region and deflect a potential legal crisis on the Rio Grande.

A new rule approved by the area’s largest irrigation district, known as Subdistrict 1, and the Alamosa-based Rio Grande Water Conservation District, sets fees charged to pump water from a severely depleted underground aquifer at $500 an acre-foot, up from $150 an acre-foot. The new program could begin as early as 2026 if the fees survive a court challenge.

“It’s draconian and it hurts,” said Sen. Cleave Simpson, a Republican from Alamosa who is also general manager of the Rio Grande water district.

The region, home to one of the nation’s largest potato economies, has relied for more than 70 years on water from an aquifer that is intimately tied to the Rio Grande. The river begins high in the San Juan mountains above the valley floor.

Both the river and the aquifer are supplied by melting mountain snows, but a relentless multi-year drought has shrunk annual snowpacks so much that neither the river nor the aquifer have been able to recover their once bountiful supplies.

And that’s a problem. Under the Rio Grande Compact of 1938, Colorado is required to deliver enough water downstream to satisfy New Mexico and Texas. If the aquifer falls too low, it will endanger the river’s supplies and push Colorado out of compliance. Such a situation could trigger lawsuits and cost the state tens of millions of dollars in legal fees.

Subdistrict 1 has set state-approved goals to comply with the compact. Within seven years, it must find a way to restore hundreds of thousands of acre-feet of water to the aquifer, a difficult task.

Rio Grande River, CO | Photo By Sinjin Eberle

An acre-foot equals nearly 326,000 gallons of water, or enough to cover an acre of land with water a foot deep.

The specter of an interstate water fight is creating enormous pressure to reorganize the valley’s farming communities in a way that will allow them to use less water, grow fewer potatoes, and still have a healthy economy.

For more than a decade, valley water users have been working to reduce water use and stabilize the aquifer. Many have already started experimenting with ways to grow potatoes with less water by improving soil health, and to find new crops, such as quinoa, that may also prove to be profitable.

They have taxed themselves and raised pumping fees, using that revenue to purchase and then retire hundreds of wells. In fact, the district is pumping 30% less water now than it was 10 years ago, according to Simpson.

But the pumping plans, considered innovative by water experts, haven’t been enough to stop the decline in aquifer levels. The Rio Grande Basin is consistently one of the driest in the state, generating too little water to make up for drought conditions and restore the aquifer after decades of over pumping.

With the new fees, the region will likely have some of the highest agricultural water costs in the state, said Craig Cotten, who oversees the Rio Grande River Basin for Colorado’s Division of Water Resources.

Perhaps not as high as water in the Colorado-Big Thompson Project on the northern Front Range, where cities and developers and some growers pay thousands of dollars to buy an acre-foot of water.

Still it is much higher than San Luis Valley growers and others have paid historically. Fees at one time were just $75 an acre-foot, eventually reaching $150 an acre-foot. The prospect of the fee skyrocketing to $500 is shocking.

“That is high,” said Brett Bovee, president of WestWater Research, a consulting firm specializing in water economics and valuations. Typically such fees across the state have been in the $50 to $100 range, he said.

But Bovee said the water district is taking constructive action while giving growers opportunities to find their own solutions to the water shortage. “It’s putting the decision-making power into the hands of growers and landowners, rather than saying ‘everybody take one-third of your land out of production.’”

Third hay cutting 2021 in Subdistrict 1 area of San Luis Valley. Photo credit: Chris Lopez

Subdistrict 1 is the oldest and largest of a group of irrigation districts in the valley, according to Cotten. Its $500 fee has triggered a lawsuit by some growers, who believe the district is applying the new fees unfairly.

“The responsibility for achieving a sustainable water supply is to be borne proportionately based on (growers’) past, present and future usage,” Brad Grasmick, a water attorney representing San Luis Valley growers in the Sustainable Water Augmentation Group and the Northeast Water Users Association, said, referring to state water laws. “But we believe the responsibility is being disproportionately applied to our wells.”

Those growers are now trying to create their own irrigation district and they are suing to stop the new fee.

“I think that more land retirement and more reduction in well pumping is needed and that is what my group is trying to do,” Grasmick said. “No one wants to see the aquifer diminish and continue to shrink. If everybody can do their part to cut back and make that happen, that is the way forward. My guys just want to see the proportionality adhered to.”

To date, tens of millions of dollars have been raised and spent to retire wells in the San Luis Valley, with Subdistrict 1 raising $70 million in the last decade, according to Simpson. And in 2022 state lawmakers approved another $30 million to retire more wells.

But it’s not enough. With each dry year, the water levels in the aquifer continue to drop.

Republican River Basin by District

Similar issues loom for Eastern Plains irrigators

The San Luis Valley is not the only region faced with finding ways to reduce agricultural water use or face interstate compact fights. Colorado lawmakers have also approved $30 million to help growers in the Republican River Basin on the Eastern Plains reduce water use to comply with the Republican River Compact of 1943, which includes Kansas, Nebraska and Colorado.

Lawmakers are closely monitoring these efforts to reduce water use while protecting growers.

Sen. Byron Pelton, a Republican from Sterling, said the combined money that is going to the Rio Grande and Republican basins is critical. But the potential for legal battles, he said, is concerning.

“Agriculture is key in our communities,” Pelton said. “But the biggest thing is that we have to stay within our compacts. Sometimes you’re backed into a corner and that is just the way it has to be. I hate it, but we have to stay in compliance.”

How much irrigated land will be lost as wells are retired isn’t clear yet. Simpson said growers who have access to surface supplies in the Rio Grande will still be able to irrigate even without as many wells or as much water, but the land will likely produce less and farms may become less profitable.

And it will take more than sky-high pumping fees to solve the problem, officials said. The Division of Water Resources has also created another water-saving rule in Subdistrict 1 that will force growers to replace one-for-one the water they take out of the aquifer, instead of allowing them to simply pay more to pump more.

Cotten said the hope is that the higher fees combined with the new one-for-one rule will reduce pumping enough to save the aquifer and the ag economy.

Valley growers are already shifting production and changing crops, said James Ehrlich, executive director of the Colorado Potato Administrative Committee in Monte Vista, an agency involved in overseeing and marketing the region’s potato crops.

Still the new fees could jeopardize the entire potato economy, Ehrlich said.

“There are a lot of creative things going on down here,” Ehrlich said. “But we have to farm less and learn to survive as a community together. And Mother Nature has not helped us out. We’ve stabilized but we can’t gain back what (state and local water officials) want us to gain back. It is just not going to happen.”

More by Jerd SmithJerd Smith is editor of Fresh Water News. She can be reached at 720-398-6474, via email at jerd@wateredco.org or @jerd_smith.

San Luis Valley Groundwater

#RioGrande flow at Otowi in decline, fancy graph edition — John Fleck (InkStain.net)

Changing Rio Grande flow at Otowi over time. Credit: John Fleck/InkStain

Click the link to read the article on the InkStain website (John Fleck):

February 2, 2024

I’ve been updating the crufty old code I use to generate graphs to help me (and colleagues) think about river flows.

This one’s a little busy, so maybe for specific nerd colleagues’ use, and not general consumption?

It’s based on a request from a friend who uses these, and asked for a visualization of the wet 1981-2000 period compared to the drier 21st century. This is an important comparison given that a whole bunch of New Mexicans (including me!) moved here in the wet 1980s and ’90s, which created a sense of what’s “normal.”

It’s important to note that this is not a measure of climate, at least not directly. This is a measure of how much actual water flows past the Otowi gage, which is a product of:

  • climate-driven hydrology adding water
  • trans-basin diversions adding water (“trans basin diversion” singular, I guess, the San-Juan Chama Project)
  • upstream water use subtracting water
  • reservoir management decisions moving water around in time (sometimes reducing the flow by storing, sometimes increasing it by releasing)

I get so much out of staring at these graphs. A few bits from this one, which I did a few evenings ago curled up with my laptop in my comfy chair:

  • Look at the curves around Nov. 1 – a drop as irrigation season ends, following by a rise as managers move compact compliance water down the river to Elephant Butte. Makes me curious about what they were doing back in the ’80s and ’90s in November.
  • This year’s winter base flow is low.

At some point soon I’ll get the updated code onto Github, but it’s not quite ready for sharing. (I’m rewriting it in Python, because learning is fun!)

A freight train of thoughts about the #ColoradoRiver: Becky Mitchell, Colorado’s chief negotiator on the Colorado River, demands the lower-basin states take meaningful action on correcting the ‘structural deficit’ — Allen Best (@BigPivots) #cwcac2024 #COriver #aridification

Becky Mitchell. Photo credit: Allen Best/Big Pivots

Click the link to read the article on the Big Pivots website (Allen Best):

February 2, 2024

Becky Mitchell speaks crisply and with a bass-drum firmness. Her speeches are like freight trains, orderly processions full of weight, one thought pounding after another.

Her full-time job since July 2023, as Colorado’s lead negotiator in Colorado River matters, gives her weighty material that matches her rhetorical style. Before that, she informally held the same role as the director of the Colorado Water Conservation Board.

The Colorado River has been riven with rising drama in the last 20 years. The seven basin states – but particularly Arizona and California – have reluctantly, slowly conceded reforms necessary to the occasion. The federal government, the referee for the river and operator of the two giant dams, Hoover and Glen Canyon, was slow to force the hard decisions.

“It is time for a fundamental change in how we manage the Colorado River,” she told members of the Colorado Water Congress at the group’s annual conference on Jan. 30. “It’s time to adapt to the river that we have, not the river we dream of.”

“We have some difficult roads ahead of us as we work to find a sustainable solution for the basin,” she said in wrapping up her 15-minute speech. “What we must do would’ve been easier 10 years ago. It would’ve been easier 5 years ago. Tomorrow will be difficult, but we must have the courage to try.”

Following is a lightly abridged version of the speech:

Change is coming. I can’t emphasize enough how much the post-2026 negotiations matter whether you are in the upper basin, lower basin, Mexico, or a member of one of the 30 tribal nations. We all deserve a future with certainty and security in our water supply without that being jeopardized by constant crisis management. We also all deserve a future where we can live within the means of the river and without the risk of overuse or misuse driving us into crisis.

The Yampa River carried a robust runoff flow from winter snows through Steamboat Springs in May 2023, helping pull back the two giant reservoirs of the Colorado River from the brink of disaster. Top, Becky Mitchell addresses the Colorado River Water Users Association in December 2021. Photos/Allen Best

For the past two decades, the upper basin has been caught between the impacts of climate change and lower-basin overuse. I acknowledge that the lower basin does not like the term overuse. My intent is not to offend, but rather to be clear and honest about uses that exceed what the compact and hydrology can allow whatever it is called. We cannot and will not agree to guidelines that perpetuate management of our water resources that do not acknowledge what Mother Nature is providing. The basin cannot continue to use water at a rate that is unsustainable. Those who are fearful of change or who benefit from status quo will find fault in the plain facts that I share with you here today. You will find fault in the tone with which I share them.

The good news is that change is coming. The upper division states have said for years, decades now, the lower basin needs to take responsibility for the role in emptying the reservoirs. But let me be clear why this change is needed. Dry hydrology and overuse have drained the reservoirs. Future guidelines must recognize the reality of the Colorado River Basin hydrology.

Our lower basin neighbors have recently recognized that they must address the overuse. The next step for them is to explain how will they make this commitment a reality. We look forward to seeing those details.

We will continue to do everything we can to get to a seven state solution that protects Colorado and the upper basin, but we also need to be prepared for other scenarios. The upper division states have presented a concept to the lower basin states that outlines mechanisms for living within the means of the river while rebuilding and maintaining Powell and Mead and operating within the law of the river.

(Our concept) is essentially a water budget that honors the law and Mother Nature. The Colorado River Compact is our foundation. Solutions need to respect the law of the river and recognize the reality of hydrology across the entire basin. Those solutions must also be real and verifiable. Aspirational goals do not provide the clarity that is required to provide predictability across the basin.

We cannot and will not agree to balancing like the ’07 guidelines, a concept that was used to justify sending water downstream. The water should be used to rebuild storage. We’re focused on fair, legal and sustainable outcomes for the entire basin. Out of respect for the sovereignty of those lower basin states and the role of the Secretary of the Interior as the water master in the lower basin states, we have not weighed in on how they should apportion the reductions amongst themselves. That is for the lower basin (states) to work out.

We have heard our downstream neighbors say, if we figure out the structural deficit, will you meet us in the middle on climate change? That’s one heck of a hypothetical. If the lower basin overuse is addressed, we’d be looking at a very different situation than what we see today. In fact, if the lower basin had accounted for evaporation and transit losses through the ’07 guidelines, the reservoirs would likely be healthy now.

We are the ones who’ve been doing the work on climate change. We absolutely have been doing our part. What I’ve heard from across Colorado is we are willing to help. We are willing to be a part of the solution, but we cannot solve a problem alone.

We (already) take involuntary and uncompensated reductions when Mother Nature doesn’t provide water. Users in the upper basin have taken an average of 1.3 million acre-feet in shortages annually over the last several years. We make do with less in our communities, our workforce, our economies, and our food production. The lower basin must recognize and acknowledge the annual shortages that occur in the upper division states and then acknowledge — thank you — that the operation of the reservoirs must absolutely respond to hydrology. In addition, we must also acknowledge that the upper basin has not developed into our 7.5 million acre-foot apportionment and that undeveloped tribal water rights are flowing downstream.

In May 2022, this boat ramp at Lake Powell was useful as a place to sit but had no value for launching boats. Photo/Allen Best

Overuse must end, and the compact must remain our foundation. It will not be easy. As we move into a future that is more responsive to hydrology, I acknowledge that we all must acknowledge there will be hardship and pain, while also acknowledging that this hardship and pain has existed in the upper basin for decades. Because we haven’t been shielded from climate change impacts, the upper basin states are uniquely positioned to assist our downstream neighbors in learning how to live with less.

We are collaborating in unprecedented ways in the upper basin, and this time we’re doing it at a bigger table. I’m very proud that we are working with the upper basin tribal nations in recognition of their historical ownership and their undeveloped federally reserved water rights. This collaboration has made very clear to me that is unacceptable for the upper division states to accept any limitations on future uses when upper basin tribes have limited access to clean water, agricultural production, and economic vitality.

I remember the speech I gave in the summer of 2022. The reservoirs were crashing. The federal government had laid out an ultimatum: Figure out how to conserve 2 to 4 million acre feet or we’ll figure it out for you. The lower basin was unwilling and unable to reach an agreement about cuts to their uses. I remember many long meetings and long hours that my team and I put into discussions with our fellow upper division states. We worked out the five-point plan. This was a turning point for Colorado. The decision was a difficult one for me. It was not fun.

By implementing this plan, we have positioned ourselves as leaders in the basin, the ones willing to come to the table to do our part. Colorado cannot and will not accept status quo. We cannot or will not be bullied into a future that drains the reservoirs for continued unsustainable use.

For example, we pushed the Bureau of Reclamation to modify how the upper basin is represented in Colorado River Basin modeling. Our advocacy means that today the updated models better reflect the reality in the upper basin, a reality that will be represented in the post 2026 tools. Reclamation models now show what shortages look like here.

This team has also worked to make Colorado more resilient. Over the past year, the CWCB has spearheaded a turf removal program to make our municipalities more resilient for future water shortages.

Division of water resources has continued to strictly administer water rights, including painful cuts to water use to respond to Mother Nature.

My fellow commissioners and the upper Colorado River Commissioners revamped the 2024 System Conservation Pilot Program, or SCPP, to allow water users to voluntarily forego their water uses in exchange for compensation, thereby helping to put water in the river to mitigate drought in the upper division states.

California’s Imperial Valley has a year-round growing season and uses Colorado River water for palm trees and almost every crop imaginable . February 2017 photo/Allen Best

The drought task force critically examined the Colorado River issues and not only applauded the good work of the state, but recommended additional resources to augment our existing work.

The river team is also working to transition our guiding principles from paper to practice. You are all familiar with the irrefutable truths. It’s one thing to say these are our principles. It’s another thing to then apply them to the basin-states negotiations. That is a difficult task. I’ve seen some of these principles gain traction throughout the entire Colorado River basin. Federal government has acknowledged the need for managing the reservoirs sustainably. The lower basin has acknowledged the need to address their overuse. The environmental community recognizes that healthy storage at our nation’s two largest reservoirs must be the first step in protecting Colorado’s rive and the, Colorado River’s ecosystems. Gradually, I’m hearing interest from DC to the Imperial Valley, recognizing that the status quo does not work anymore.

It is time for a fundamental change in how we manage the Colorado River. We must all live within the means of the river if we hope to sustain it. I want Lake Powell and Lake Mead to serve the purposes they were designed to serve. To provide for sustainable development of our compact apportionments in the Colorado River Basin and to provide water security in dry years. A sustainable system means we have to rebuild storage in Lake Powell and Lake Mead and protect upstream storage for releases only in the most dire circumstances. This means that the worldview around water must change, particularly in the lower basin. We must manage demand to rebuild the storage that provides certainty of supply. In all years, we all must adapt to the available water supply.

We have an opportunity now to collaboratively determine how to adapt to the river that we have, not the river we dream of. The lower basin states have said many good things that signal that they are open to collaboration.

We believe them when they say they will own the structural deficit, when they say they will live within the means of the river, when they say they will support the tribes and that they support the environment. I take them at their word. We assume that they are serious about these commitments, and we expect open and transparent accounting of all lower basin uses of main stem tributaries so that we can trust but verify their actions. We hope that the lower basin will come around to support the framework for management of Lake Powell and Lake Mead that is sustainable for the 40 million people who rely on the Colorado River.

What we must do would’ve been easier 10 years ago. It would’ve been easier five years ago. Tomorrow will be difficult, but we must have the courage to try.

Colorado River Basin Plumbing. Credit: Lester Doré/Mary Moran via Dustin Mulvaney and Twitter

A Future With Certainty: #ColoradoRiver Commissioner Rebecca Mitchell Speaks on Tough Road Ahead for Post-2026 Negotiations — #Colorado Department of Natural Resources #cwcac2024 #COriver #aridification

“New plot using the nClimGrid data, which is a better source than PRISM for long-term trends. Of course, the combined reservoir contents increase from last year, but the increase is less than 2011 and looks puny compared to the ‘hole’ in the reservoirs. The blue Loess lines subtly change. Last year those lines ended pointing downwards. This year they end flat-ish. 2023 temps were still above the 20th century average, although close. Another interesting aspect is that the 20C Mean and 21C Mean lines on the individual plots really don’t change much. Finally, the 2023 Natural Flows are almost exactly equal to 2019. (17.678 maf vs 17.672 maf). For all the hoopla about how this was record-setting year, the fact is that this year was significantly less than 2011 (20.159 maf) and no different than 2019” — Brad Udall

From email from the Colorado Department of Natural Resources (Michael Elizabeth Sakas):

February 1, 2024

Rebecca Mitchell, Colorado’s Upper Colorado River Commissioner, spoke to a sold-out crowd at the Colorado Water Congress’s Annual Convention in Aurora, CO this week. She shared an update on the state’s negotiation positioning, and the reality of difficult roads ahead, as the states and Tribal Nations work to find sustainable solutions for 40 million people who rely on the Colorado River in the arid southwest.

“Change is coming to the Colorado River and because it is, I can’t emphasize enough how much the Post-2026 negotiations matter,” Commissioner Mitchell said in her speech. “Whether you are in the Upper Basin, Lower Basin, Mexico, or a member of one of the 30 Tribal Nations, we all deserve a future with certainty and security in our water supply, without that being jeopardized by constant crisis management.”

The current guidelines, called the ‘07 Guidelines, manage Lake Powell and Lake Mead. These expire in 2026, and the states that share the river are in the process of negotiating new guidelines for how Lake Powell and Lake Mead will operate post-2026. Powell and Mead hit their lowest levels on record in recent years, partly because states in the Lower Basin continue to use more water than what flows into these reservoirs. Commissioner Mitchell said that the ‘07 Guidelines cannot simply be extended.

“I want to recognize that the Lower Basin does not like the term overuse. My intent is not to offend, but rather to be clear and honest about uses that exceed what the Compact and hydrology can allow,” Commissioner Mitchell said. “Whatever you call it, we cannot– and will not– agree to guidelines that perpetuate management of our water resources that do not acknowledge what Mother Nature is providing. The Basin cannot continue to use water at a rate that is unsustainable.”

“History shows that collaborative efforts by the Basin States can provide superior solutions. We will continue to do everything we can to get to a seven-state solution that protects Colorado and the Upper Basin. But we also need to be prepared for other scenarios,” Commissioner Mitchell said.

“Our Colorado River team is a force. I cannot thank the Colorado Water Conservation Board, the Division of Water Resources, and the Attorney General’s teams enough. Also, I greatly appreciate the support of  Governor Polis, who has been engaged and helpful as we enter these critical negotiations,” Commissioner Mitchell said. “Together, we have shown the federal government and the Lower Basin that Colorado cannot and will not accept the status quo or be bullied into a future that drains the reservoirs for continued, unsustainable use in the Lower Basin.”

Map credit: AGU

Click the link to read Commissioner Mitchell’s full speech from the 2024 Colorado Water Congress Annual Convention on the Colorado Department of Natural Resources website:

Rebecca Mitchell, Colorado’s Upper Colorado River Commissioner 
Colorado Water Congress Annual Convention Speech
Jan. 31, 2024

Change is coming – and because it is, I can’t emphasize enough how much the Post-2026 negotiations matter.

Whether you are in the Upper Basin, Lower Basin, Mexico, or a member of one of the 30 Tribal Nations, we all deserve a future with certainty and security in our water supply without that being jeopardized by constant crisis management. We all deserve a future where we can live within the means of the river, without the risk of overuse or misuse driving us into crisis.

For the past two decades, the Upper Basin has been caught between the impacts of climate change and Lower Basin overuse, along with the increasing risk that our thirsty neighbors will look upstream for more water.

The structural deficit refers to the consumption by Lower Basin states of more water than enters Lake Mead each year. The deficit, which includes losses from evaporation, is estimated at 1.2 million acre-feet a year. (Image: Central Arizona Project circa 2019)

I want to recognize that the Lower Basin does not like the term overuse. My intent is not to offend, but rather to be clear and honest about uses that exceed what the Compact and hydrology can allow. Whatever you call it, we cannot – and will not – agree to guidelines that perpetuate management of our water resources that do not acknowledge what Mother Nature can provide.

The Basin cannot continue to use water at a rate that is unsustainable.

Those who are fearful of change, or who benefit from the status quo, will find fault with the plain facts I share here with you and will find fault with the tone in which I share them, as an excuse for their inaction. We must move forward together to face the future with honesty and courage. You, Colorado, and all people in the Basin deserve nothing less than honesty and courage.

The good news? Change is coming. The Upper Division States have said for decades that the Lower Basin needs to take responsibility for its role in emptying the reservoirs.

Let’s be clear about why this change is needed. The ‘07 Guidelines cannot be extended. Under the ‘07 Guidelines, dry hydrology and overuse by the Lower Basin have drained the reservoirs. Future guidelines must recognize the reality of Colorado River Basin hydrology.

Our Lower Basin neighbors recognize that they must address their overuse, what they call the “structural deficit.” I applaud that first step of acknowledging their responsibility. The next step is for them to explain how they will make this commitment a reality that we can rely on. We look forward to seeing those details.

The history of the Basin shows that collaborative efforts by the Basin States can provide superior solutions. We will continue to do everything we can to get to a seven-state solution that protects Colorado and the Upper Basin.

But we also need to be prepared for other scenarios.

The Upper Division States have presented a concept to the Lower Basin States that outlines mechanisms for living within the means of the river while rebuilding and maintaining Powell and Mead, and operating within the Law of the River – essentially a water budget that honors the law and Mother Nature.

The Colorado River Compact is our foundation. Solutions need to respect the Law of the River and recognize the reality of the hydrology of the Colorado River Basin. Solutions must also be real and verifiable. Aspirational goals do not provide the clarity that is required to provide predictability to the Basin.

We cannot and will not agree to continue  “balancing” under the ‘07 Guidelines, a concept used to justify sending water downstream to fuel Lower Basin overuse. That water should be used to rebuild storage.

We’re focused on fair, legal, and sustainable outcomes for the entire Basin.

Out of respect for the sovereignty of the Lower Basin States, and the role of the Secretary of the Interior as Water Master of the Lower Basin, we have not weighed in on how they should apportion reductions among themselves. That is for the Lower Basin to work out. We’ve rolled up our sleeves in a good-faith effort to balance the demands with supplies, and the need to have water available in dry years to keep the system from crashing.

We have heard our downstream neighbors say, “If we figure out the structural deficit, will you meet us in the middle on climate change?”

First off – that’s one heck of a hypothetical. If Lower Basin overuse is addressed, we would be looking at a very different situation than what we see today. In fact, if the Lower Basin had accounted for evaporation and transit losses throughout the ‘07 Guidelines, the reservoirs would likely be healthy.

But at this time, we’re the only ones who’ve been doing anything about climate change. We’ve shown that we are willing to do our part, that we have been doing our part. I have heard across Colorado that we’re willing to help – but we cannot solve the problem alone.

We take involuntary and uncompensated reductions when Mother Nature does not provide. Water users in the Upper Basin have taken an average of 1.3 million acre-feet in shortages annually over the last several years. In other words, we have used 1.3 million acre-feet less than what we may have used if our water users’ demands were fulfilled.
 
When we make do with less water, we also make do with less in our communities, our workforce, our economies, and our food production. The Lower Basin must recognize and acknowledge the annual shortages that occur in the Upper Division States, and then acknowledge that the operation of reservoirs must respond to hydrology.

In addition, we must acknowledge that the Upper Basin has not developed into our 7.5 million acre-foot apportionment and that undeveloped Tribal water rights are flowing downstream.

Regardless of what the future agreement looks like, the sideboards are set: we can no longer operate without regard for Mother Nature, overuse must end, and the Compact must remain our foundation.

It won’t be easy. As we move to a future that is more responsive to hydrology, I acknowledge that there will be hardship and pain in the Lower Basin – while also acknowledging that this hardship and pain has existed in the Upper Basin for decades, because we haven’t been shielded from climate change impacts.

The Upper Basin is uniquely positioned to assist our downstream neighbors in learning to live with less.

Seventy-five years ago, my predecessor agreed to the 1948 Upper Colorado River Compact, which established the Upper Colorado River Commission (UCRC) as a forum for “interstate comity.” That sentiment has never been truer in the Upper Basin than today. The Upper Division States are strongly united, and we’re stronger because of the common interests shared across Colorado, New Mexico, Utah, and Wyoming.

Native America in the Colorado River Basin. Credit: USBR

We are collaborating in unprecedented ways in the Upper Basin, and this time we’re doing it at a bigger table. I’m very proud that we are working with the Upper Basin Tribal Nations in recognition of their historical ownership and their undeveloped federally reserved water rights. This collaboration has made it very clear to me that it is unacceptable for the Upper Division States to accept any limitations on future uses when the Upper Basin Tribes have limited access to clean water, agricultural production, and economic vitality.

What we can do and what we will do is operate responsibly, and initiate programs and policies that promote sustainable uses across the Upper Basin.

I would like to take a moment to reflect on how far we have come as a state, and as the Upper Basin, over the last couple of years. I remember the speech I gave to you all in the summer of 2022. The reservoirs were crashing. The federal government had laid out an ultimatum: “Figure out how to conserve 2 to 4 million acre-feet, or we’ll figure it out for you.” The Lower Basin was unwilling and unable to reach an agreement about cuts to their uses.

When it became clear that a Basin agreement was impossible, I remember the many long meetings and long hours that my team and I put into discussions with our fellow Upper Division States. And we worked our way to the Five Point Plan.

That Five Point Plan was a turning point for Colorado. You all know that decision was a difficult one for me. But by implementing this plan, we positioned ourselves as leaders in the Basin as the ones willing to come to the table to do our part.

A few short months later, the General Assembly passed a bill that funded the creation of several new full-time employees. If you’ve ever worked in state government, you’ll know that getting one new employee is a massive success – imagine then how significant it is to secure nearly 20 positions dedicated to Colorado River issues.

Our Colorado River team is a force. I cannot thank the Colorado Water Conservation Board, the Division of Water Resources, and the Attorney General’s teams enough. Together, we have shown the federal government and the Lower Basin that Colorado cannot and will not accept the status quo or be bullied into a future that drains the reservoirs for continued, unsustainable use in the Lower Basin.

For example, we pushed the Bureau of Reclamation to modify how the Upper Basin is represented in Colorado River Basin modeling. Our advocacy means that today, the updated models better reflect the reality in the Upper Basin — a reality that will be represented in post-2026 tools. Reclamation models now show what shortages look like here. The models also show how shortage cuts into our water needs.

This team has also worked to make Colorado more resilient. Over the past year, the CWCB has spearheaded a turf removal program to make our municipalities more resilient to future water shortages; DWR strictly administered water rights – including painful cuts to water use – to respond to Mother Nature; Me and my fellow Upper Colorado River Commissioners revamped the 2024 System Conservation Pilot Program – or SCPP – to allow water users to voluntarily forgo their water uses in exchange for compensation, thereby helping to put water in the river to mitigate drought in the Upper Division States; and the Drought Task Force critically examined Colorado River issues, and not only applauded the good work of the state, but recommended additional resources to augment our existing work.

The Colorado River team is also working to transition our guiding principles from paper to practice. You are all familiar with the irrefutable truths. It’s one thing to say, “These are our principles.” It’s another thing to then apply them in Basin State negotiations.

I’ve seen some of the principles gain traction throughout the entire Colorado River Basin.  The federal government has acknowledged the need for managing the reservoirs sustainably. The Lower Basin has acknowledged the need to address their overuse. The environmental community recognizes that healthy storage at our nation’s two largest reservoirs must be the first step in protecting the Colorado River’s ecosystems.

Gradually, I’m hearing diverse interests, from D.C. to the Imperial Valley, recognize that the status quo doesn’t work anymore, that it is time for a fundamental change in how we manage the Colorado River, and that we must all live within the means of the River if we hope to sustain it.

I want Lake Powell and Lake Mead to serve the purposes they were designed to serve: to provide for sustainable development of our compact apportionments in the Colorado River Basin, and to provide water security in dry years.

A sustainable system means we have to rebuild storage in Lake Powell and Lake Mead, and protect upstream storage for releases only in the most dire circumstances. This means that the worldview around water must change – particularly in the Lower Basin. We must manage demand to rebuild the storage that provides certainty of supply in all years. We all must adapt to the available water supply.

We hope our Lower Basin partners will meet us in this moment. We have an opportunity to collaboratively determine how to adapt to the river that we have, not the river that we dream of.

The Lower Basin states have said some good things that signal they are open to collaboration. We believe them when they say that they will “own the structural deficit,” when they say they will “live within the means of the River,” that they “support the Tribes,” and that they “support the environment.”

I take them at their word. We assume they are serious about these commitments, and we expect open and transparent accounting of all Lower Basin uses– mainstem and tributaries– so that we can trust but verify their actions.

We hope that the Lower Basin will come around to support a sustainable framework for the management of Lake Powell and Lake Mead for the 40 million people who rely on the Colorado River. We are bound together by this River, by the Compact we signed 100 years ago, and by our shared interest in a vibrant American southwest.

Utilizing unprecedented federal funds, I believe that we can reach an agreement that protects all who rely on this critical resource – and we should do this post haste: 40 million people are counting on us.

I want to acknowledge my counterparts in both the Upper and Lower Basins, along with the leadership of the Bureau of Reclamation, and the fact that we have some difficult roads ahead of us as we work to find a sustainable solution for the Basin.  What we must do would have been easier ten years or even five years ago. Tomorrow will be difficult, but we must have the courage to try.

The history of the Basin shows that collaborative efforts by the Basin States can provide superior solutions. We all know we must prepare for other scenarios. But for now, I promise you that we are focused on finding that collaborative solution.

My request is that Colorado stay unified at this critical time in the negotiations. I commit to making space and time to have the difficult discussions we need to have within Colorado about these important issues. But the most important task – right now – is to find success in the negotiations with the other Basin States.

Success depends on all of us staying together with a common goal of protecting the resources of Colorado for all who depend upon them – including the Tribal Nations, agricultural users, cities, and the environment.

Thank you.

Colorado River “Beginnings”. Photo: Brent Gardner-Smith/Aspen Journalism

Aspinall Unit Forecast for Operations January 30, 2024 #GunnisonRiver #ColoradoRiver #COriver #aridification

From email from Reclamation (Erik Knight):

Click the link to view the forecast graphics.