Why Rivers Need Their Floodplains — EOS

The restored floodplain of the South Fork McKenzie River in Oregon, USA after the 2020 Holiday Farm Fire. Credit: Kate Meyer, USDA Forest Service

Here’s the release from the American Geophysical Union (Ellen Wohl):

Floodplains store materials moving downstream and, in doing so, provide habitat for a wide variety organisms. Water, dissolved materials, sediment, and organic matter move downstream, but individual water or solute molecules or sediment grains can be stored on floodplains for periods that range from a few minutes to 10,000 years for sediment on the floodplain of the Amazon River. Storage reflects the strongly three-dimensional movements of materials in a river corridor. Episodic exchanges of water, solutes, sediment, and organic matter between the channel, floodplain, and subsurface create a dynamic environment with diverse habitat. A recent article in Reviews of Geophysics examines the influencing factors and nature of floodplain storage. Here, the author answers our questions about floodplain storage.

What different materials move around and are stored on floodplains?

The main categories of material moving within and stored on floodplains are water, solutes, sediment, and organic matter.

Storage of water on floodplains is critical during the extremes of weather: overflow of high water onto a floodplain can reduce the peak flow and limit flood damage, and storage of water in the subsurface of a floodplain can sustain base flow during dry periods.

Among solutes, nutrients such as nitrogen and phosphorus receive a lot of attention, partly because they represent a paradox. Although these elements are necessary to most living organisms, human activities have introduced such large amounts of nitrogen and phosphorus to rivers that the excess now creates severe environmental problems such as eutrophication, or lack of dissolved oxygen in the water that results in fish die-offs.

Contaminants such as heavy metals or synthetic chemicals that attach to silt and clay can also be stored in floodplains, limiting the concentrations of these toxins in the channel.

Burned uplands adjacent to the South Fork McKenzie floodplain after the 2020 Holiday Farm Fire. Credit: Kate Meyer, USDA Forest Service

How does the concept of a “budget” help us to understand inputs, outputs, and storage on a floodplain?

Thinking of a budget that applies over specified time and space scales can help to identify sources and processes that create inputs, outputs, and storage.

The measurements used to create a sediment budget, for example, could help to identify whether a floodplain is losing mass through time (net erosion of sediment) at a rate that might alter the ability of the floodplain to attenuate flood peaks. Or, measurements that quantify sediment inputs and outputs could identify a net gain of sediment through time as a result of upstream changes in land cover or changing climate across the watershed.

A floodplain integrates processes occurring throughout the upstream contributing area and creates a stratigraphic record of these processes. Changes in floodplain budgets over thousands of years can be interpreted from this stratigraphic record, facilitating our ability to infer the associated changes in watershed processes.

What are some of the main natural factors that affect floodplain storage?

Primary natural controls on floodplain storage are the width of the valley floor relative to the width of the channel. Many natural rivers alternate repeatedly downstream between relatively narrow and wider portions of the valley.

The heterogeneity of the floodplain surface and stratigraphy also strongly influence storage. Generally, the more heterogeneous or patchy the floodplain, the greater the storage because the irregular surface and stratigraphy effectively slow the downstream movement of water, solutes, sediment, and organic matter.

The fluxes of material moving down the channel also influence floodplain storage. Some of the sediment moving down a channel with a large sediment flux is more likely to be stored on the floodplain than in a river corridor with very little sediment moving downstream.

How do human activities affect floodplain storage?

Human activities can directly affect floodplain storage by disconnecting the channel and floodplain.

Artificial levees and flow regulation exemplify human-induced changes that typically limit overbank movement of materials from the channel to the floodplain.

People also change the character of the floodplain via land drainage and groundwater pumping that dry the floodplain and by changing the floodplain land cover through agriculture and urbanization.

Aggregate mining on floodplains not only reduces sediment storage but severely disrupts the movement and storage of other materials on floodplains.

Human activities can increase floodplain storage by introducing larger quantities of solutes or sediment to a river network. Excess nitrogen resulting from fossil-fuel combustion and agricultural fertilizers is sometimes referred to as the nitrate time bomb because, even after nitrate inputs to a river network are reduced, the excess nitrate continues to accumulate at progressively higher levels in floodplain sediments.

Overall, however, human alterations simply and homogenize floodplains and reduce floodplain storage.

The restored floodplain of the South Fork McKenzie River during the 2020 Holiday Farm Fire. Credit: Kate Meyer, USDA Forest Service

What is “floodplain restoration” and why is it needed? Can you give a specific example of a floodplain restoration scheme that improved resilience to natural and human disturbances?

Floodplain restoration involves restoring processes that create and maintain floodplain functions, typically by restoring the three-dimensional exchanges of water, solutes, sediment, and organic matter between the channel, floodplain, and subsurface.

Floodplain restoration is needed for at least three reasons. First, floodplain storage reduces downstream hazards associated with floods and excess sediment. Second, fully functional floodplains host high levels of biodiversity and provide ecosystem functions such as clean water. Third, floodplains have not received the legal protection afforded to navigable rivers in the US and other countries.

Floodplains are likely to be in private ownership and to be heavily altered by agriculture and urbanization; consequently, they are endangered ecosystems. Ongoing river restoration at the South Fork McKenzie River in Oregon, USA has reconnected the channel and floodplain. When the Holiday Farm fire burned through the area in 2020, the presence of water on the newly reconnected floodplain decreased the burn severity in the restoration area.

What are some of the unresolved questions where additional research, data, or modeling is needed?

We have made good progress in measuring and modeling some of the processes involved in floodplain storage, especially for surface water and sediment, but there are huge discrepancies between our understanding of surface water and sediment dynamics and our understanding of subsurface water, solute, and organic matter inputs, outputs, and storage.

Because our understanding of the movements of these latter materials is limited, we cannot yet integratively model how subsurface water, solutes, microbial communities, and organic matter, for example, interact within a floodplain over diverse scales of time and space. The ability to develop this type of model would be ideal for predicting floodplain response to restoration.

In the meantime, treating floodplain restoration projects as experiments that are monitored and used to gain understanding that can inform future restoration is critical.

—Ellen Wohl (ellen.wohl@colostate.edu, ORCID logo 0000-0001-7435-5013), Colorado State University, USA

Thornton wins lottery award for Big Dry Creek work — #Northglenn/#Thornton Sentinel

Screen shot from the City of Thornton Big Dry Creek Recreation & Floodplain Restoration Master Plan (Click image to read the report)

From Great Outdoors Colorado via The Northglenn/Thornton Sentinel:

Thornton’s work restoring 25 acres of the Big Dry Creek Open Space has been recognized by the Colorado Lottery.

The Colorado Lottery announced on April 21 that it had awarded the city a Starburst Award for the project, which used lottery proceeds to help pay for the work.

“Conservation is a key pillar for the Lottery. It includes not only conserving open space, but also upgrading recreational spaces, creating new places for Coloradans to play, and supporting ecosystems and wildlife,” said Tom Seaver, director of the Colorado Lottery. “This year’s Starburst Award winners aptly reflect the wide-ranging projects that our proceeds support. With now $3.6 billion going to our proceeds beneficiaries, we continue to look for new ways to grow revenue responsibly to protect more of Colorado’s great outdoors.”

The $1,745,000 project used a $75,000 planning grant and $100,000 Great Outdoors Colorado Habitat Restoration grant to the City of Thornton, both Colorado Lottery proceeds, to help pay for the work.

The city restored approximately 25 acres of Big Dry Creek Open Space, an important natural resource and ecosystem for east-west wildlife migration, as part of the project. Due to erosion and noxious weeds, Big Dry Creek’s floodplain had been severely compromised. GOCO funding was used to improve conditions along the creek and create overflow wetlands that will reduce flood hazards and protect water quality. These restoration efforts have also helped improve critical habitat for bald eagles, blacktailed prairie dogs, peregrine falcons, red foxes, and great blue herons, among other species.

The Big Dry Creek project was the last remaining open space ‘pearl’ needed to create a complete system of open space corridors in Thornton. Big Dry Creek provides outstanding opportunities for passive recreation and wildlife habitat and encompasses almost 300 acres of open space areas that have been preserved through acquisition by Thornton and Adams County.

Water & Tribes Initiative | #ColoradoRiver Basin — The University of Montana #COriver #aridification

Colorado River. Photo credit: University of Montana

I heard about this at yesterday’s AWRA Colorado Section Annual Symposium. Click through for the resources.

The Colorado River provides water to more than 40 million people in two countries, seven states, and 29 Indian tribes. The demand for water currently exceeds available supply in any given year and is complicated by chronic drought and the uncertainty of impacts from climate change.

The 29 federally recognized tribes in the basin depend on the waters of the Colorado River and its tributaries for a variety of purposes, including cultural and religious activities, domestic, irrigation, commercial, municipal and industrial, power generation, recreation, instream flows, wildlife, and habitat restoration.

These tribes hold legal rights to a significant amount of water, many of which are the most senior in the basin. Combined, the tribes hold rights to roughly 20 percent (or 2.9 million-acre feet) of the water in the Colorado River basin. With the oldest water rights in the basin, the tribes are in a position to play a significant role in balancing water demand and supply and otherwise shaping the future of the region.

Since 2017, the Center has been working with the Babbitt Center for Land and Water Policy, Walton Family Foundation, Ten Tribes Partnership, and many other individuals and groups to enhance tribal capacity and advance sustainable water management in the basin through collaborative decision-making.

The Initiative is guided by a broad-based Leadership Team (see a list of members and their bios below). It is not a decision-making body; does not speak on behalf of tribes, tribal associations, or any other organization or group; and is not an advocate for any particular interest or outcome. It seeks to enhance the capacity of tribes and to advance sustainable water management through collaborative decision-making.

Leadership Team
Tribal Members

Bidtah Becker, Navajo Nation
Leland Begay, Ute Mountain Ute
Lorelei Cloud, Southern Ute Tribe
Maria Dadgar, Inter Tribal Council of Arizona (Jay Tomkus, alternate)
Jason John, Navajo Nation
Nora McDowell, Fort Mojave Indian Tribe
Margaret Vick, Colorado River Indian Tribes
Jay Weiner, Quechan Tribe

Other Members

Anne Castle, Getches-Wilkinson Center, University of Colorado
Peter Culp, Culp & Kelly (Mary Kelly, alternate)
Becky Mitchell, Colorado Water Conservation Board
Colby Pellegrino, Southern Nevada Water Authority
Jason Robison, University of Wyoming, College of Law
Tanya Trujillo, Colorado River Sustainability Initiative
Garrit Voggesser, National Wildlife Federation
John Weisheit, Living Rivers

#Colorado farmers are heading into one of the driest planting seasons in the last 20 years — 9News.com

From The Denver Post (Wilson Beese):

We’re halfway through April and the longer days are warming up the soil, so Colorado farmers and ranchers are starting to plant.

Colorado Drought Monitor April 20, 2021.

But a quick look at the drought map for Colorado shows why agriculture producers are concerned for the future of their crops. Almost 90 percent of the state is in a moderate drought.

What makes this April stand out is how much land is an extreme or exceptional drought — nearly a third of the state. In the 21-year history of the U.S. Drought Monitor, only Colorado’s 2013 drought shows more D3 and D4 conditions in April…

Les Owen, the conservation services division director with the Colorado Department of Agriculture, said the drought conditions are “extremely concerning” for farmers and ranchers.

“Last year during the critical growing times when we needed moisture, there just wasn’t much in most areas of the state,” Owen said. “So folks have already been punched in the gut pretty hard from drought.”

[…]

Owen noted that last year’s wildfires burned swaths of federal land that ranchers usually graze their cattle on.

Appeal filed to sustain #ColoradoRiver flows and stop Gross Dam expansion — Wild Earth Guardians

Gross Reservoir — The Gross Reservoir Expansion Project will raise the height of the existing dam by 131 feet, which will allow the capacity of the reservoir, pictured, to increase by 77,000 acre-feet. The additional water storage will help prevent future shortfalls during droughts and helps offset an imbalance in Denver Water’s collection system. With this project, Denver Water will provide water to current and future customers while providing environmental benefits to Colorado’s rivers and streams. Photo credit: Denver Water

Here’s the release from Wild Earth Guardians (Jen Pelz):

Coalition stays the course in fight to halt construction of tallest dam in Colorado history

A coalition of conservation groups filed a notice of appeal today in the Tenth Circuit Court of Appeals seeking to halt Denver Water’s proposed expansion of Gross Dam in Boulder County and to protect sustainable flows in the Colorado River. The appeal challenges the dismissal by the lower court and asks the appeals court to order review of the merits of the case to ensure the health of the Colorado River, its native and imperiled species, and communities across Colorado that will be negatively impacted by the project…

The conservation coalition, including Save The Colorado, The Environmental Group, WildEarth Guardians, Living Rivers, Waterkeeper Alliance, and the Sierra Club, originally filed suit on December 19, 2018, in the federal district court of Colorado. The groups’ litigation sought to halt Denver Water’s expansion of Gross Reservoir in Boulder County and prevent an additional diversion of water from the Colorado River through its Moffat Collection System due to violations of federal environmental laws including the Clean Water Act, Endangered Species Act, and the National Environmental Policy Act. The project would triple the storage capacity of Gross Reservoir and the dam would become the tallest dam in the history of Colorado.

On March 31, 2021, the district court dismissed the coalition’s case finding that it was not before the proper court because the Federal Power Act provides the federal court of appeals with sole authority over hydropower licensing by the Federal Regulatory Commission.

“Given the climate, water and biodiversity crises upon us, we need to be restoring river ecosystems, not destroying them,” said Jen Pelz, Wild Rivers Program Director at WildEarth Guardians. “This battle against the powerful water institution is not over and we will continue to fight for water and climate justice by working to reform this broken system of laws and policies.”

“The Sierra Club opposes the Gross Reservoir expansion because of the massive environmental damage it would cause,” said Rebecca Dickson, Chair of the Sierra Club-Indian Peaks Group. “If this project proceeds, hundreds of thousands of trees will be chopped down, countless habitats destroyed, and yet another waterway will be diverted from its natural course to the Front Range. On top of this, immeasurable amounts of greenhouse gasses will be released into the atmosphere during the construction and transportation process.”

“Denver Water’s plan to build the tallest dam in Colorado history will hurt the 40 million people in seven states and two countries who depend on the Colorado River for their water supply,” said Daniel E. Estrin, general counsel and advocacy director at Waterkeeper Alliance. “The basin is slowly dying a proverbial ‘death by a thousand cuts’ as its communities and ecosystems face a water crisis driven by unsustainable demand, prolonged drought, and runaway climate change. We stand with our fellow conservation groups in continuing to oppose this misguided and reckless water grab.”

“The expansion of Gross Dam is a shortsighted response to a long-term problem,” said Beverly Kurtz the President of The Environmental Group. “Denver Water should lead the way in finding sustainable solutions to the challenge of water scarcity, rather than destroying pristine areas of western Boulder County and further threatening the Colorado River with an antiquated dam proposal. Recent data confirm that predicted shortages of water in the Colorado River Basin due to climate change are happening even sooner than expected. Building a bigger dam does not increase the amount of water available. The District Court needs to hear the merits of our case rather than establishing a dangerous precedent by deferring authority to FERC and the federal court of appeals.”

“The year of decision, to not divert more water from the Colorado River, came and went about twenty years ago,” said John Weisheit, conservation director of Living Rivers in Moab, Utah. “We know this is true because the development of contingency planning agreements to avoid water shortages began in 2014 and the urgency to resolve this threat still remains. Yet the contradictions and absurdities to also develop a suite of diversion projects in the Colorado River Basin also remains. If the basin’s water managers will not even adapt to the hydrology they accept, how could they possibly adapt to the hydrology of the future? Our lawsuit is an appeal to accept the truth that the Colorado River has nothing left to give.”

The groups’ appeal is posted here: http://pdf.wildearthguardians.org/support_docs/Notice-of-Appeal.pdf

The organizations participating in this litigation are represented by the public interest environmental law firm Eubanks & Associates, PLLC.

#ColoradoRiver District provides funds for #BlueRiver basin project — Summit Daily #ColoradoRiver #COriver #aridification

A fly fisherman on the Blue River in Silverthorne on Nov. 28, 2020, which is designated a “gold medal” status based on the size and abundance of trout. Photo credit: John Herrick/Aspen Journalism

From The Summit Daily (Taylor Sienkiewicz):

The Colorado River District has approved funding for several projects across the Western Slope, including Phase 2 of the Blue River Integrated Water Management Plan in Summit County. The district allocated $25,000 to the project. The Blue River plan was created by the Blue River Watershed Group and Trout Unlimited in 2019.

The goal of the plan is to understand why there is a decline of fish between the Dillon and Green Mountain reservoirs and how to reverse or mitigate the problem. The plan and its associated research is also intended to guide future goals and projects in the Blue River basin watershed.

Phase 2 of the plan involves gathering data and analyzing certain areas of the Blue River basin identified as needing further analysis in Phase 1.

Fear and the depleted #ColoradoRiver — Writers on the Range #COriver #aridification

Members of the Colorado River Commission, in Santa Fe in 1922, after signing the Colorado River Compact. From left, W. S. Norviel (Arizona), Delph E. Carpenter (Colorado), Herbert Hoover (Secretary of Commerce and Chairman of Commission), R. E. Caldwell (Utah), Clarence C. Stetson (Executive Secretary of Commission), Stephen B. Davis, Jr. (New Mexico), Frank C. Emerson (Wyoming), W. F. McClure (California), and James G. Scrugham (Nevada)
CREDIT: COLORADO STATE UNIVERSITY WATER RESOURCES ARCHIVE via Aspen Journalism

From Writers on the Range (George Sibley):

Some Colorado River tribulations today remind me of a folk story: A young man went to visit his fiancée and found the family trembling and weeping. They pointed to the ceiling where an axe was embedded in a rafter.

“That could fall,” the father quavered. “It could kill someone!”

Puzzled, the young man climbed onto a chair, and pulled the axe out of the rafter. Everyone fell all over themselves thanking him. But he quickly broke off the engagement, concerned that such inanity might be inheritable.

This resembles ongoing ditherings over the 1922 Colorado River Compact, a 99-year-old agreement among the seven states through which the Colorado River meanders, on how the consumptive use of the river’s water should be divided to give each state a fair share. The agreement was necessary to get federal participation (money) to build dams to control the erratic river.

The best they were able to do, given the sketchy information they had about each state’s future development and also about the flow of the river, was to divide the river into two “basins” around the natural divide of the Colorado River canyons: Colorado, Utah, Wyoming and New Mexico in the Upper Basin; and California, Arizona and Nevada in the Lower Basin. Each basin would get to consume 7.5 million acre-feet of the river’s water.

This placed a responsibility on the Upper Basin states to “not cause the flow of the river at Lees Ferry (the measuring point in the canyons) to be depleted” below the Lower Basin’s share.

A generous reading of that lawyerly clause in the Compact would say the upper states should just be careful that their water development doesn’t dip into the lower states’ allocation.

A less generous reading would say that if for any reason the flow at Lees Ferry fell below the average of 7.5 million acre feet – whether it were due to over-appropriation by the upper states, or to a natural cause like a 20-year headwaters drought – the lower states would place a call on the upper states, which would have to cut back their own uses and send their water downriver, whether they “caused” the shortage or not.

To maintain that flow in a drought, the upper states would bear the full pain of the drought for the whole river.

Guess which interpretation the upper states chose for their own 1948 compact? Never mind that a Compact call from California (for its share of water) is nowhere mentioned in the 1922 Compact. The axe was planted in the rafter.

They might better have asked how the 1922 Compact creators themselves envisioned the unknown future. The transcripts of the 27 Compact meetings show that the seven state commissioners and their federal chairman Herbert Hoover were concerned, as late as their twenty-first meeting, that they did not really know enough then about the river’s flows to make a permanent equitable division of the waters.

Hoover summarized their concern, and their intent: “We make now, for lack of a better word, a temporary equitable division,” leaving the further apportionment of the river’s use “to the hands of those men who may come after us, possessed of a far greater fund of information.” They even included in the Compact (Article VI) instructions for reconvening to consider “claims or controversy… over the meaning or performance of any of the terms of this compact.”

By the drought years of the 1930s, it was already obvious that the 7.5 million acre-feet Compact allocations were unrealistic. That would have been a logical time for the upper states to pull the axe out of the rafter, before the river was so fully developed.

But they didn’t, and as the Compact began to take on the aura of something carved in stone on a holy mountain, the fear of the “Compact call” gradually descended into expensive paranoia.

The vastly expensive 24 million acre-feet of storage in Powell Reservoir just upstream from Lees Ferry was created to fulfill the upper Basin’s self-assumed “delivery obligation,” come hell or low water.

But now, hellish low water has come to Powell, and Upper states are developing expensive “demand management” programs whereby someone yet unspecified would pay ranchers to fallow fields so their water can be “banked” in Powell against the dreaded “Compact call.”

The seven states are now – finally – initiating negotiations on a more reality-based governance of the Colorado River. Let’s hope they have the good sense to pull that axe out of the rafters before negotiating fair water use under it.

George Sibley

George Sibley is a contributor to Writers on the Range, writersontherange.org, a nonprofit dedicated to spurring lively discussion about Western issues. He has written extensively about the Colorado River.

Cleaner water through corn — University of #California, Riverside

The North Fork Valley, part of the service territory of Delta-Montrose Electric, has been known for its organic fruits and vegetables — including corn. Photo/Allen Best

Here’s the release from the University of California, Riverside (Holly Ober):

Activated carbon made from corn stover filters 98% of a pollutant from water

Corn is America’s top agricultural crop, and also one of its most wasteful. About half the harvest—stalks, leaves, husks, and cobs— remains as waste after the kernels have been stripped from the cobs. These leftovers, known as corn stover, have few commercial or industrial uses aside from burning. A new paper by engineers at UC Riverside describes an energy-efficient way to put corn stover back into the economy by transforming it into activated carbon for use in water treatment.

An illustration depicting how corn stover is turned to biochar, then to activated carbon for water filtration. (Abdul-Aziz et. al., 2021)

Activated carbon, also called activated charcoal, is charred biological material that has been treated to create millions of microscopic pores that increase how much the material can absorb. It has many industrial uses, the most common of which is for filtering pollutants out of drinking water.

Kandis Leslie Abdul-Aziz, an assistant professor of chemical and environmental engineering at UC Riverside’s Marlan and Rosemary Bourns College of Engineering, runs a lab devoted to putting pernicious waste products such as plastic and plant waste known as biomass back into the economy by upcycling them into valuable commodities.

“I believe that as engineers we should take the lead in creating approaches that convert waste into high-value materials, fuels and chemicals, which will create new value streams and eliminate the environmental harm that comes from today’s take-make-dispose model,” Abdul-Aziz said.

Abdul-Aziz, along with doctoral students Mark Gale and Tu Nguyen, and former UC Riverside student Marissa Moreno at Riverside City College, compared methods for producing activated carbon from charred corn stover and found that processing the biomass with hot compressed water, a process known as hydrothermal carbonization, produced activated carbon that absorbed 98% of the water pollutant vanillin.

Hydrothermal carbonization created a biochar with higher surface area and larger pores when compared to slow pyrolysis- a process where corn stover is charred at increasing temperatures over a long period of time. When the researchers filtered water into which vanillin had been added through the activated carbon, its combination of larger surface area and bigger pores enabled the carbon to absorb more vanillin.

“Finding applications for idle resources such as corn stover is imperative to combat climate change. This research adds value to the biomass industry which can further reduce our reliance on fossil fuels,” Gale said.

The paper, “Physiochemical properties of biochar and activated carbon from biomass residue: influence of process conditions to adsorbent properties,” is published in ACS Omega.

This #EarthDay, Rising to Meet the Challenges Facing Our Rivers — @Water4Colorado

From Water for Colorado:

Earth Day falls at a precarious time of year for Coloradans and our rivers. As spring arrives, many of us are returning to our favorite hiking trails, riverbanks, and camping spots for warm-weather recreation; others are enjoying the waning days of spring skiing or working off the winter rust and getting back on the river for some fishing.

But by mid-April, Coloradans will also stand on the precipice of fire season. As the water year passes its peak, we take stock of drought conditions across the state; and snowpack begins to melt and start its journey from the headwaters in the Rocky Mountains to our rivers.

The State of Our Rivers

This year, snowpack in the mountains — which provides 85-90% of the Colorado River’s flow — has peaked early and is below average, again. The “Millenium Drought” in the southwestern U.S. is now over 20 years old. On top of last year’s dry summer and fall, forecasters expect below average runoff, and low streamflows later this year.

Many of you may recall that last year, around this time, nearly a third of the state was drought-free. Unfortunately, all of Colorado is now experiencing abnormally dry conditions, with 32% classified as being in “extreme” or “exceptional drought.” This comes, too, on the heels of last year’s historic fire season that saw the three largest wildfires in state history.

Additionally, as of Friday, April 23 — the day after Earth Day — 25% or more of Colorado’s streams, rivers, and wetlands lost protection as the roll-back of federal Clean Water Act protection went into effect in Colorado. This Trump-era policy exposes Colorado’s streams and wetlands — the state’s sources of clean drinking water and wildlife habitat — to degradation as a result of construction activities. Without a state program to backstop the loss of federal protection, this policy threatens many iconic areas of Colorado. Until 4/23, Colorado had been the only state to avoid implementing the rule because a judge issued an order keeping the policy from going into effect; now, that has been overturned. The below maps, put together by Coalition partners The Nature Conservancy and Trout Unlimited, illustrate the extent of potential damages to our critical streams and wetlands.

The Good News

Poised on the brink of another drought-heavy summer and devastating roll-backs to clean water protection, Earth Day may feel more urgent this year. Indeed, this holiday was created to recognize and promote environmental protection; and although on this Earth Day we are confronting sobering drought maps, below-average streamflow predictions and threats to Colorado’s vital headwater streams and wetlands, we also have a lot to celebrate.

In the Colorado Recovery Act, Governor Jared Polis and Colorado House Speaker Alec Garnett allocated up to $75 million for funding river-projects, wildfire mitigation, and drought response. Earlier this week, the Legislature gathered for a committee hearing on HB21-1260, which would allocate an additional $20 million to the Colorado Water Conservation Board and grant-funded projects. And, sports-betting revenue continues to generate millions to fund Colorado’s Water Plan.

Where the Money Goes

Water plan funding allows for increased resilience to the types of climate change-induced drought we’re seeing statewide, and ensures that our rivers don’t dry up, agricultural heritage sustains, and flows are available to support world-renowned recreation.

You can explore our interactive Colorado Water Plan Grant Projects Map here, and learn about the types of projects these funds benefit. Some examples include:

  • Updating agricultural infrastructure to replace aging equipment, improve efficiency and flows, prevent wasteful leakages, and restore natural environmental features.
  • Providing municipalities funding to ensure safe and reliable drinking water for all.
  • Sustaining Colorado’s rivers for recreational use, including flow restoration and river health projects which supports the robust ~$19 billion in economic activity that river-related recreation generates.
  • Funding innovative water education conversations, workshops, and experiences statewide on issues such as sustaining agriculture, educating the next generation of water users, and protecting watershed health.

The CWCB is in the process of updating the Colorado Water Plan to include all of this and more. Do you have ideas for how the Water Plan can benefit your community? Share them here.

Taking Time to Reflect

Understanding the threats facing our rivers and the importance of well-funded, on-the-ground projects is crucial not only to our work here at Water for Colorado, but to our state and future generations of Coloradans.

But in the end:

We feel the best way to truly understand Colorado’s rivers — and therefore protect them — is to experience them. So, this Earth Day, find a riverbank, cast a line, watch a sunset over a reservoir, or simply give thanks for the clean water that flows from your tap. These things are precious, and Earth Day reminds us of that.

Photo courtesy of Russ Schnitzer

Drought Maps courtesy of U.S. Drought Monitor

Clean Water Rule roll-back maps courtesy of Trout Unlimited and The Nature Conservancy.

The Spring Newsletter 2021 is hot off the presses from the Upper Gunnison Water Conservancy District #GunnisonRiver #ColoradoRiver #COriver #aridification

Click here to read the newsletter. Here’s an excerpt (Beverly Richards):

Drought Conditions Stay Strong on the Western Slope

West Drought Monitor April 20, 2021.

As spring runoff begins, water managers on the Western Slope turn to drought predictions for the season and well into the summer. Drought conditions continue to persist in most of western Colorado and throughout the southwestern United States. Many areas have continued in or have moved into the exceptional (D4) category and these conditions will likely carry us through the summer and into the fall.

Gunnison River Basin High/Low graph April 23, 2021 via the NRCS.

What does this mean for the water resources in the Upper Gunnison River Basin and downstream? Snowpack in the Upper Gunnison Basin is currently at 77 percent of average and the snow water equivalent (SWE) is at 12.9” for this time of year. The peak for SWE usually occurs between April 5 to April 17 and is typically at 14.7” at the peak.

This means that going into spring runoff, we are below average in both snowpack and SWE. Add this to the fact that Taylor Park and Blue Mesa Reservoir are currently at 59 and 49 percent of full respectively, conditions this runoff season could continue to deteriorate, though demands will likely stay the same. The Bureau of Reclamation is forecasting that Blue Mesa Reservoir will only fill to 67 percent full and NRCS forecasts that streamflow will only be 57 percent of average for the season.

Lack of soil moisture will also add to the problems for water managers this coming water season. Soil moisture in the entire state is classified as either the second lowest or record lowest in the 10-year average. This will have implications on streamflow if the soil profile must be filled first.

The predictions from the National Oceanic and Atmospheric Administration (NOAA) are that these drier conditions that are currently being experienced throughout the entire southwestern United States will continue and could result in the most significant drought since 2013. From April through June, warmer than normal temperatures and lower than normal precipitation is forecasted to continue, adding to the drier than normal conditions.

The Upper Gunnison District realizes that diminished supplies means special attention MUST be paid to how we manage our water. We will continue planning for every contingency. Our mission this year is to get the word out about ways we can all adjust to drought and how we can all be mindful of our water use. It will take cooperation from everyone within the District to meet all our needs. Be an Upper Gunnison Basin Water Hero!

‘Forever Chemicals’ Levels In #Frisco Drinking Water Would Be Illegal In Three Other States, Residents ‘Shocked’ — CBS #Denver #PFAS

PFAS contamination in the U.S. via ewg.org. [Click the map to go to the website.]

From CBS Denver (Kati Weis):

A CBS4 Investigates analysis of public testing data has found levels of perfluoroalkyl substances – commonly known as forever chemicals – in Frisco’s drinking water would be considered too high in Vermont, Massachusetts, and New York. The levels would also trigger further testing requirements in Michigan.

Jessica Johnson, who lives and works in Frisco, said she was unaware of the elevated levels.

“I was pretty shocked, honestly, to learn that the forever chemicals were in our water,” Johnson said. “It’s concerning for me; thyroid issues run in my family, so I don’t really want to do anything that would exacerbate that, because I’m sure it’s probably looming on the horizon for me anyway.”

The Findings

While there is no federal legal limit, the EPA recommends drinking water not have more than 70 parts per trillion of PFOA and PFOS combined, but some states say that’s not good enough, setting more stringent legal limits…

State health department testing conducted last summer found Frisco’s drinking water had a level of 58.5 for the chemicals regulated in Massachusetts and Vermont, more than twice the legal limits in those states. The testing also found Frisco had a level of 11 parts per trillion of PFOS, which would be above the safe limit set in New York. Frisco’s PFOA level was only 6.2 part per trillion, but would require quarterly testing in Michigan…

The Town of Frisco says right now, there’s no health concern, because the PFAS levels are below the EPA’s health advisory of 70 parts per trillion…

Frisco spokesperson Vanessa Agee wrote in an email, “an interview with Frisco’s Water Division would do nothing to further your viewer’s understanding of PFAS or alert them to a health danger, which are in fact really admirable and helpful goals that we hope you have much success with, as it is vital that we have the facts and current understanding around this evolving research into PFAS and PFAS’ potential impacts on our health.”

Asked why residents were not notified about the PFAS testing results, Agee wrote, “if there were a health concern, then the EPA and CDPHE would require individual notification of residents, and the Town would of course provide that notification swiftly because we authentically care about the health of our neighbors and friends, which is what Frisco’s residents are in this very close-knit community and county. The public would be very well served by understanding that the science around PFAS is evolving, understanding where that science is right now, and having knowledge about what is being done across Colorado and the country to better understand PFAS and their impact on health.”

The state health department has also told CBS4 in a past interview that residents should not be concerned about the elevated levels, because they are below the health advisory, but that if residents are still concerned, they can look at purchasing a reverse osmosis filtration system for their home or bottled water…

The Laws

Currently, the state of Colorado has taken its own steps to begin regulating PFAS, for example, new state legislation has created a PFAS registry, so state officials know where industrial PFAS sources are located.

But Josh Kuhn with Conservation Colorado says the centennial state should study the issue further and look at setting its own more stringent legal limits…

What’s Next

In the meantime, Agee says Frisco is in the process of conducting further testing in other areas of its water distribution system, including at the tap “to get a more comprehensive picture.”

The Colorado Department of Public Health and Environment also says it’s in the process of developing a grant program to assist Frisco and other communities with additional testing.

“The CDPHE grant program has not been launched yet so the Town Water Division is doing what it does best, providing safe and delicious water, while always striving to have a full understanding of the facts,” Agee said in an email to CBS4.

The CDPHE says the testing will help officials determine what areas and private wells may be at risk for PFAS.

One question remains: what is the source of the PFAS pollution in Frisco? PFAS can be found in a variety of household products, and even your clothes. The Environmental Working Group also found PFAS in cosmetics.

The state health department is working to find an answer in Frisco, writing to CBS4, “we expect these (test) results to provide insight into where the chemicals may be coming from.”

Opinion: Recycling #water has to become the norm because it is too scarce and too valuable to waste — The #Colorado Sun

Morrow Point Dam, on the Gunnison River. Photo: Brent Gardner-Smith/Aspen Journalism

From The Colorado Sun (Ari Goldfarb):

Like millions of teens around the world, my daughter enjoys long showers. Unlike many fathers of teens, however, I see a bright side to the family water bill.

We’re not just taking showers. We’re growing grapes.

Our family lives in Israel, the international capital of water recycling, where nearly 90% of our supply is used more than once. In our area of southern Israel, that means the water flowing down our home drain is used on nearby farms to grow some of the tastiest table grapes on Earth. Turns out my daughter is a friend of agriculture.

Ari Goldfarb via Kando.com

All over the globe, climate change is turning fresh water into an increasingly precious commodity. Many countries and regions suffer from extended drought. Rising temperatures increase evaporation from reservoirs. Snow falls less and melts sooner on mountains. And rising sea levels increase saltwater intrusion contamination in fresh water wells along coastal communities.

The worldwide fresh water supply crunch comes as the Earth’s population grows by more than 80 million people per year.

With increasing demand for water and a jeopardized supply, communities increasingly are turning to recycling technologies to stretch and make the most efficient use of existing water supplies. Critical to this is having a clear understanding of the quality of the water coming into any treatment plant before it is recycled.

The greatest reuse per capita is happening in arid Middle Eastern countries such as Israel, Qatar, and Kuwait, though the No. 1 recycler of water by volume is the United States. The leading states for water recycling are Florida, California, Texas, Arizona, Nevada, and Colorado.

In Orange County, California, engineers found it’s 15% cheaper to recycle water than to buy new supplies from rivers and reservoirs.

But what about the yuck factor?

The most important thing to remember is: No matter the water source — untrammeled mountain spring, or the river mouth of a major industrial city — it all must pass stringent health and safety tests before reaching your tap. In fact, recycled water often faces tougher quality control tests than river or lake water. Water reuse is safe.

Another key point is that we’ve been relying on recycled water for years without realizing it. In the Southwestern United States, stream water in places like the Rio Grande and Colorado River is typically used several times before it ever reaches the ocean. (The demands on the Colorado River are so great from Colorado to Mexico that it sometimes does not contain enough water to reach the sea.) The same water used by cities near the headwaters is used again and again downstream by farmers for irrigation.

Few people have second thoughts about using the same air as someone else. Why think about water differently?

It’s important to remember that the vast majority of water, whether recycled or first-use, does not go to the tap for drinking. It’s for growing crops, irrigating parks and golf courses, and watering lawns. In many places where water is scarce, it’s possible, and often economical, to set up two separate water systems, one for outdoor and one for indoor potable use.

Almost every city using recycled water in the U.S. sends the treated supply outside. Some cities pump recycled water underground to replenish aquifers. Most, however, reuse the water as an irrigation supply for farming or landscaping. One advantage of using recycled water outdoors: natural cleansing processes via vegetation, bacteria, and UV radiation do for free what would be more costly industrial processes in water treatment plants.

The reality is that water on this planet exists in a closed loop on a closed cycle. There is a limited amount of this precious resource, and the double-whammy of climate change and population growth are putting extra pressure on the supplies we have.

Water is too valuable to waste. In fact, it’s so valuable that we should use it again and again.

Ari Goldfarb is CEO of Kando, an Israel-based company, providing data-driven wastewater management solutions to help cities worldwide keep rivers and oceans cleaner while stimulating the reuse of water. Kando is affiliated with the Israel-Colorado Innovation Fund which invests in and connects Israeli entrepreneurs with U.S. markets through Innosphere Ventures, a Colorado technology incubator.

#Snowpack news: The #SouthPlatteRiver Basin’s second peak for the season very near the normal peak date

Click on a thumbnail below to view a gallery of snowpack data from the NRCS. Now that all the basins are melting-out pay more attention to the percent of peak, slope of the downward line (melt rate), and this year’s peak date which were earlier than average.

Here’s the Westwide SNOTEL basin-filled map for April 26, 2021 via the NRCS.

Westwide SNOTEL basin-filled map April 26, 2021 via the NRCS.

#Colorado Distillers, Builders and Restaurateurs Get #Water Savvy this #EarthDay — @WaterEdCO


Connie Baker, co-founder and head distiller for Marble Distilling in Carbondale, stirs mash during the distilling process. Photo courtesy of Marble Distilling.

From Water Education Colorado (Sara Kuta):

Beginning in 1970, Americans and later citizens across the globe have celebrated Earth Day on April 22. It’s a day dedicated annually to civic action, volunteerism and other activities to support and promote environmental protection and green living.

This year, Fresh Water News is using Earth Day as an opportunity to highlight a handful of Colorado projects and businesses that are moving the needle on water conservation and sustainability. Here are their stories.

Booze that doesn’t “destroy the planet”

In 2010, Connie Baker attended distilling school somewhat on a whim — she’d always loved vodka and thought learning more about how it’s made would be a fun week-long vacation.

In the end, though, Baker fell in love with distilling and, along with her husband, Carey Shanks, began planning to open a new distillery not far from their home in Carbondale, Colo.

But after touring distilleries around the country for inspiration, they began to fully understand just how resource-intensive — and wasteful — distilling as an industry often was. Traditional distilleries send tens of thousands of gallons of clean water down the drain during the production process — water that could easily be reused, if only they had the right setup.

“I love vodka, but I don’t want to destroy the plant to make it,” said Baker.

Instead of accepting the status quo, Baker and Shanks decided to design and build their own sustainable distillery from the ground up. Their crown jewel? A custom water energy thermal system, WETS for short, that recaptures 100 percent of the water and energy used during the distillation process.

They officially opened Marble Distilling in 2015. Ever since, their WETS system has saved more than four million gallons of water and 1.8 billion BTUs of energy per year. The recaptured energy is enough to heat and cool the distillery, which includes a five-room boutique hotel on the second floor, and to power much of the distilling process.

The distillery’s water bill is regularly less than $100 a month. While most distilleries use the equivalent of 100 bottles of water to produce one bottle of vodka, Marble uses the equivalent of just one bottle of water per bottle of vodka. (They also make bourbon, whiskey and liqueurs.)

Carey Shanks, co-founder of Marble Distilling in Carbondale, works in the distillery’s off-site barrel storage facility. Photo courtesy of Marble Distilling.

“The only water we’re using for the spirit is what’s in the bottle,” Baker said.

Baker and Shanks also freely share information about their WETS system and other sustainable elements with anyone and everyone who’s curious, including and especially other distilleries.

“We don’t want to own this information,” Baker said. “We want to be leaders in the industry for change. We have proven over the course of six years that it absolutely can be done. It makes sense not only from a sustainability standpoint but from an economic standpoint. There’s no reason not to do it. It’s not any harder, so why wouldn’t you do it?”

Sustainability at 14,000 feet

The infrastructure atop the iconic 14,115-foot Pikes Peak is getting a refresh — and one that’s particularly friendly to water.

Construction crews are finishing up work on the new Pikes Peak Summit Complex, which includes a visitor center, a high-altitude research laboratory, and a municipal utility facility.

Visitors to the summit number upwards of 750,000 annually, and the previous facilities that welcomed them at the top were deteriorating. Replacing them created an opportunity to do things differently. The 38,000-square-foot complex, which is set to open around Memorial Day, aims to be net-zero for energy, waste and water consumption; it also hopes to become the first Living Building Challenge-certified project in Colorado, a rigorous green building standard created by the International Living Future Institute.

The project, which is expected to cost $60 million to $65 million when complete, incorporates a number of water-saving and conservation features, including a pioneering on-site wastewater treatment plant, a vacuum toilet system, low-flow fixtures, and a rainwater harvest system for potential future use.

Even with increased visitor numbers, the new complex is expected to use 40 to 50 percent less water than the 1960s-era Summit House it will replace. That water has to be hauled up the mountain, a 40-mile round trip.

Construction crews work to build the new Pikes Peak Summit Complex atop Pikes Peak. The new complex features an array of sustainable design elements and aims to be net-zero for energy, water and waste. Photo courtesy of City of Colorado Springs.

In 2018, crews hauled 600,000 gallons of fresh water to the summit, according to Jack Glavan, manager of Pikes Peak – America’s Mountain, a self-supporting enterprise of the City of Colorado Springs. (Colorado Springs operates the Pikes Peak Recreation Corridor, which includes the Pikes Peak Highway and related facilities, through a special use permit granted by the U.S. Forest Service, which owns the land.) The new facility should cut that down to between 300,000 and 350,000 gallons a year, Glavan said.

“In the past, we used roughly a gallon to 1.2 gallons per person, and with this water system, we’re figuring we’re going to cut that down to 0.4 to 0.5 gallons per person,” said Glavan.

Similarly, the water-savvy upgrades will allow the facility to halve the amount of wastewater it hauls down to the Las Vegas Street Wastewater Treatment Plant, which requires an 80-mile round trip.

On top of the water efficiencies, the upgrades will also reduce vehicle trips and associated emissions. Freshwater trips are expected to drop from 127 to 72 per year, and wastewater trips from 174 to 69.

The building also aims to be one of the first in Colorado to reuse water that’s been treated on-site. But for final approval from the state, complex managers must first prove that the wastewater system works, a process that will likely involve about a year of sampling, Glavan said. Assuming all goes according to plan, the facility will use reclaimed water for toilets and urinals.

All told, the facility’s leaders hope that these and many other sustainable design features — undertaken as part of the highest-altitude construction project in the United States, on top of the mountain that inspired the lyrics of “America the Beautiful” — encourage others to reduce their impact on the environment in whatever way possible.

Water-saving vacuum toilets in the new Pikes Peak Summit Complex, which also features an on-site wastewater treatment plant, low-flow water fixtures, and other water-saving features. Photo courtesy of City of Colorado Springs.

“We’re proud to be doing it,” Glavan said. “It does cost a little bit more incrementally but we are America’s mountain and we’re hoping we’re setting an example for everyone. If we can do it up here at 14,000 feet, people should be able to do it at lower altitudes.”

Restaurant redux

While working as a hotel engineer at the ART Hotel in Denver several years ago, Mac Marsh noticed that whenever he responded to a maintenance request in the kitchen, the faucet was almost always running. But why?

After some investigating, he found out that running cold water over frozen food was the industry standard when it wasn’t possible to defrost it in the refrigerator. These food-safety defrosting guidelines, set by the U.S. Department of Agriculture’s Food Safety and Inspection Service and followed by local health officials, are intended to keep restaurants’ guests safe and healthy, since keeping food cool as it defrosts helps prevent the growth of harmful bacteria and pathogens.

But it takes one hour to defrost one pound of meat under cold water, which equates to about 150 gallons of water per pound. When he began to think about all the restaurants and all the food they defrosted on a daily basis, Marsh realized he had to act.

He invented a novel solution to the problem: a device that can recirculate cold water in a sink or basin. His Boss Defrost device, which plugs into a power outlet, is also equipped with a thermometer, which helps users ensure the water stays below the recommended 71 degrees Fahrenheit. The Denver company began manufacturing the devices, now used in more than 25 states, in January 2020.

The company’s leaders say Boss Defrost can reduce a restaurant’s defrosting water use to about 450 gallons per month on average, a sharp decline from the approximately 32,000 gallons that an average commercial kitchen uses to defrost food each month.

“This water waste is food service’s skeleton in the closet,” said Diana López Starkus, who’s a partner in the business along with her husband, Chris Starkus, an award-winning Denver chef and farmer. “It happens all along the food chain, from fast food to fine dining, K-12 schools, college campuses, hospitals, hospice and state and federal buildings.”

Though the pandemic — and ensuing restaurant shutdowns and capacity limits — slowed down the company’s growth, it also gave them an opportunity to expand into grocery meat and seafood departments.

Sales picked up again when restaurants began to reopen, since their owners were looking for every possible way to save money as they recovered from the pandemic. Starkus said the device generally pays for itself in water bill savings in one to three months.

“We like to say it’s a win-win-win,” Starkus said. “Good for the earth, good for your wallet and the easiest sustainability measure to initiate in 2021. “We’re passionate about empowering ourselves and others to create positive change toward a better future. That’s why we call it Boss Defrost, because every prep cook in the nation can become an environmental boss, someone that’s working optimally, respecting the resources at their fingertips and staying financially sound.”

Sarah Kuta is a freelance writer based in Longmont, Colorado. She can be reached at sarahkuta@gmail.com.

Stream Management Planning & Rancher Stewardship in #Colorado — The River Network

Photo credit: The River Network

From The River Network (Mikhaela Mullins):

Since 2017, River Network has worked to increase the number and quality of Stream Management Plans in Colorado. Stream Management Plans, or SMPs, were developed as a result of 2015’s Colorado’s Water Plan, which set goals and measurable objectives to map out the future of water management in the state. One of these objectives is that 80% of locally prioritized streams have an SMP by 2030. River Network is helping watershed coalitions meet this objective by developing guidance on best practices, facilitating a peer learning network, and providing direct support to local coalitions throughout Colorado.

“Everybody has an interest in water now. There’s a lot more fingers in the pie and it’s a lot easier to all work together to dig out the pie than it is to fight over it.” — Greg Higel, Centennial Ditch Superintendent

SMPs are data-driven assessments of river health that help communities determine how to protect or enhance environmental and recreational assets in their watershed. SMPs are accomplished by stakeholders convening to evaluate the health of their local river through an assessment of biological, hydrological, geomorphological and other data. This site-specific information is used to assess the flows, water quality, habitat, and other physical conditions that are needed to support collaboratively identified environmental and/or recreational values. To date, there are 26 SMPs that have been completed or are underway. SMPs are as much about people and communities as they are about the functional health of the river. Community and stakeholder buy-in is seen as a critical aspect of a successful SMP.

As the second-largest economic sector and the largest consumer of water in Colorado, agriculture is a key stakeholder in SMPs. In the San Luis Valley, the Rio Grande Headwaters Restoration Project has done an incredible job at engaging local farmers and ranchers in their SMP and related projects, many of whom have been farming and ranching there for generations. In a recent trip River Network staff, Mikhaela Mullins, had the opportunity to hear directly from these ranchers to discuss the deep connection they have with the land and the Rio Grande River.

Kyler Brown (left) and Thad Elliott (right). Photo credit: The River Network

Local ranchers, Greg Higel, Rick Davie, Thad Elliott, and Kyler Brown, shared that stewardship for the land and water has always been important to them and their families. In recent years they had wanted to make improvements to their ditches, diversion structures, and headgates but lacked the resources to make these needed improvements. When they were approached by the Rio Grande Headwaters Restoration Project about partnering on infrastructure improvement projects, they were eager for the opportunity to work together. “The river needed help, and we needed to make sure we did that right,” says Greg Higel, Centennial Ditch Superintendent. Through these partnerships, a number of ditches and related infrastructure were updated. Over time, the ranchers have been able to reduce the amount of time needed to maintain these structures and have seen water quality improve, wildlife return to their land, an increase in riparian plant diversity, and an increase in water quantity resulting in a longer season of water access. The ranchers spoke about how working with Rio Grande Headwaters Restoration Project and other conservation organizations has been a win-win-win situation for all involved in these multi-beneficial projects.

Thad Elliott with photos of the Rio Grande River from the 80’s. Photo credit: The River Network

In the future, River Network will continue to support watershed coalitions as they tackle important river planning and identify how it can provide benefits to farmers and ranchers. River Network looks forward to continuing to shift the conversation between conservation and agricultural stakeholders by expanding the role of agricultural organizations, such as conservation districts, to have more of a leadership role. Learn more about the work that River Network has done in Colorado in this video.

Learn more about the Rio Grande Headwaters Restoration Project at http://www.riograndeheadwaters.org. Learn more about the River Network Colorado Stream Management Plan program at http://www.coloradosmp.org.

As a hotter, drier #climate grips the #ColoradoRiver, #water risks grow across the Southwest — #AZ Central #COriver #aridification

Hoover Dam, straddling the border between Nevada and Arizona, holds back the waters of the Colorado River in Lake Mead. In 2016, Lake Mead declined to its lowest level since the reservoir was filled in the 1930s. Source: Bureau of Reclamation

From Arizona Central (Ian James):

The water level of Lake Mead, the country’s largest reservoir, has dropped more than 130 feet since the beginning of 2000, when the lake’s surface lapped at the spillway gates on Hoover Dam.

Twenty-one years later, with the Colorado River consistently yielding less water as the climate has grown warmer and drier, the reservoir near Las Vegas sits at just 39% of capacity. And it’s approaching the threshold of a shortage for the first time since it was filled in the 1930s.

The latest projections from the federal government show the reservoir will soon fall 7 more feet to cross the trigger point for a shortage in 2022, forcing the largest mandatory water cutbacks yet in Arizona, Nevada and Mexico.

The river’s reservoirs are shrinking as the Southwest endures an especially severe bout of dryness within a two-decade drought intensified by climate change, one of the driest periods in centuries that shows no sign of letting up.

With a meager snowpack in the Rocky Mountains and the watershed extremely parched, this month’s estimates from the federal Bureau of Reclamation show Lake Mead could continue to decline through next year and into 2023, putting the Southwest on the brink of more severe shortages and larger water cuts.

“What really is starting to emerge is this really long pattern, that we’re in a megadrought in a lot of the western U.S.,” said Laura Condon, an assistant professor of hydrology and atmospheric sciences at the University of Arizona. “It’s kind of like a cumulative impact, that we’ve just been getting hotter and drier and hotter and drier.”

One of Lake Mead’s spillways the last time water lapped at the top of the spillway was 1999.

Many scientists describe the past two decades in the Colorado River Basin as a megadrought that’s being worsened by higher temperatures with climate change. While the Southwest has always cycled through wet and dry periods, some scientists suggest the word “drought” is no longer entirely adequate and that the Colorado River watershed is undergoing “aridification” driven by human-caused warming — a long-term trend of more intense dry spells that’s here for good and will complicate water management for generations to come.

Both Lake Mead and the upstream reservoir Lake Powell are dropping. Taken together, the country’s two largest reservoirs now hold the smallest quantity of water since 1965, when Powell was still filling behind the newly built Glen Canyon Dam.

The Colorado River has long been overallocated to supply farmlands and growing cities from Denver to Phoenix to Los Angeles. And the growing strains on the river suggest that Lake Mead, its sides coated with a whitish “bathtub ring” of minerals along its retreating shorelines, will continue to present challenges as the Southwest adapts to a shrinking source of water.

“There will still be ups and downs and we will have wetter and drier years going forward but overall warmer temperatures mean we should expect a drier basin with less water,” Condon said. “Warmer temperatures increase the amount of water plants use and decrease snowpack. Even if we get exactly the same quantity of precipitation, a warmer basin will produce less streamflow from that precipitation.”

Lake Mead was about 40% full in December 2019, but will almost certainly fall further this year, as will its companion reservoir of the desert southwest, Lake Powell. Photo/Allen Best

[…]

Representatives of the seven states that depend on the river met at Hoover Dam in 2019 and signed a set of agreements, called the Drought Contingency Plan, laying out steps to reduce the risks of a damaging crash. Arizona and Nevada agreed to take the first cuts to help prop up Lake Mead, while California agreed to participate at lower shortage levels if the reservoir continues to drop.

The states’ water officials described the deal as a “bridge” agreement to temporarily lessen the risks and buy some time through 2026, by which time new rules for sharing shortages must be negotiated and adopted.

Under the deal, Arizona and Nevada have left some water in Lake Mead in 2020 and 2021. Those reductions are set to increase next year under the “Tier 1” shortage, which the federal government is expected to declare in August.

Looking downstream from the base of Hoover Dam. Concrete structure in the center of the photo is the outlet for the Nevada side emergency spillway.

Arizona is in line for the largest cuts, which will reduce the Central Arizona Project’s water supply by nearly a third and shrink the amount flowing through the CAP Canal to farmlands in Pinal County. Nevada is also taking less water, and Mexico is contributing under a separate deal by leaving some of its supplies in Lake Mead.

“We have a plan to deal with these shortages,” said Tom Buschatzke, director of the Arizona Department of Water Resources. “We’ve known this was possible for a long time and have planned for it.”

He and other officials say the Drought Contingency Plan never guaranteed the region would escape a shortage, but that it has reduced the odds of Mead falling to critical lows and has pushed back the possibility of more severe shortages and larger cuts. Buschatzke said voluntary conservation measures by the states and Mexico since 2014, plus the initial mandatory cuts over the past two years, have left about 40 feet of conserved water in Lake Mead.

“We would already be in a Tier 2 shortage had that water not stayed in the lake,” Buschatzke said during a panel discussion hosted by the Arizona Capitol Times. “It’s what we can do to slow the reduction in Lake Mead and minimize the depth and length of the shortages.”

[…]

A warmer watershed, a shrinking river

Scientists have found that the Colorado River is sensitive to rising temperatures as the planet heats up with the burning of fossil fuels. In one study, scientists determined that about half the trend of decreasing runoff in the river’s Upper Basin since 2000 was the result of unprecedented warming.

In other research, scientists estimated the river could lose roughly one-fourth of its flow by 2050 as temperatures continue to rise. They projected that for each additional 1 degree C (1.8 degrees F) of warming, the river’s average flow is likely to drop by about 9%.

The past year has been especially harsh. Ultradry conditions intensified across much of the West, with extreme heat adding to the dryness throughout the Colorado River watershed. According to the National Weather Service, the past 12 months were the driest on record in Utah, Nevada, Arizona and New Mexico, and the fourth-driest in Colorado, where much of the river’s flow originates.

Lake Powell now stands just 36% full.

Lake Powell is seen in a November 2019 aerial photo from the nonprofit EcoFlight. Keeping enough water in the reservoir to support downstream users in Arizona, Nevada and California is complicated by climate change, as well as projections that the upper basin states of Colorado, Utah, Wyoming and New Mexico will use as much as 40% more water than current demand. A recent white paper from a lineup of river experts calls those use projections into question.
CREDIT: ECOFLIGHT via Aspen Journalism

The reservoir typically gets a boost in the spring and summer as the river swells with runoff from melting snow. But this winter, the snowpack peaked at 88% of the long-term median and has since dropped to 71% of the median. The dry soils in the watershed are soaking up some of the melting snow like a sponge, leaving less water running into the Colorado and its tributaries.

The amount of water that will flow into Powell from April through July is now estimated at just 38% of average.

Water researchers Eric Kuhn and John Fleck said their analysis of the latest federal numbers points to some alarming possibilities. The two — who coauthored the book “Science Be Dammed: How Ignoring Inconvenient Science Drained the Colorado River” — wrote in separate blog posts that a careful reading of the data in the 24-month study, which only goes out to March 2023, shows the projections point to bigger troubles at Mead and Powell later that year.

Fleck wrote that the “most likely” scenario would put the level of Mead at an elevation around 1,035 feet at the end of September 2023, which would trigger larger cuts for Arizona, Nevada and Mexico, as well as California’s participation in reductions.

“I’m talking about the midpoint in a range of possible outcomes,” Fleck wrote. “A run of wet weather could make things substantially better. But a run of dry weather could make them worse.”

Kuhn wrote that the assumptions in the government study “do not fully capture the climate-change driven aridification of the Colorado River Basin.” He said the projections suggest Lake Powell could drop in 2023 to “a level that is troublingly close to the elevation at which Glen Canyon Dam could no longer generate hydropower.”

[…]

Across the West, snow has traditionally stored a vital portion of the water, gradually melting and releasing runoff in the spring and summer. But that’s changing with higher temperatures. Researchers from the University of California, Irvine, found in a study last year that the western U.S. has experienced longer and more intense “snow droughts” in the second half of the period from 1980 to 2018.

“The main issue is the snow drought everywhere in the entire West, including Arizona, Utah, California, Colorado,” said Amir AghaKouchak, a professor in UC Irvine’s Department of Earth System Science. “When the snow is below average, it means low-flow situations in summer, drier soil moisture. And drier soil moisture increases the chance of heat waves.”

The upshot, he said, is that “we have to prepare for a different hydrologic cycle, basically.”

Warm and dry in the headwaters

With higher temperatures, more snow has been melting earlier in the year. Scientists recently examined 40 years of data from snow monitoring sites across the western U.S. and Canada and found increasing winter snowmelt at a third of the sites…

With higher temperatures, more snow has been melting earlier in the year. Scientists recently examined 40 years of data from snow monitoring sites across the western U.S. and Canada and found increasing winter snowmelt at a third of the sites.

Other researchers have discovered that the dry periods between rainstorms have grown longer on average across the western United States during the past 45 years. Scientists with the U.S. Department of Agriculture and the University of Arizona found this trend throughout the West in their study, but they saw the most extreme changes in the desert Southwest, where rainstorms have been happening much less frequently.

The average dry period between storms in the desert Southwest has gone from 31 days to 48 days, an increase of about 50 percent since the 1970s, the scientists found. Annual precipitation declined by about 3.2 inches in the region over that period, a much larger decline that the West as a whole.

“In the desert Southwest, we were averaging around 10 inches and now we’re averaging around 7 inches,” said Joel Biederman, a hydrologist at USDA’s Southwest Watershed Research Center in Tucson. “That’s much more impactful when you consider that the amount in our region is smaller to begin with.”

Biederman and his colleagues focused on changes that have been measured and didn’t attempt to parse the influences of natural variations and climate change.

A separate analysis of climate data over the past 30 years by the National Oceanic and Atmospheric Administration shows the nation’s “normals,” or averages, have shifted dramatically in a decade, growing wetter in the central and eastern U.S. and drier in the Southwest while climate change has pushed temperatures higher.

Another group of scientists at Los Alamos National Laboratory recently looked at how interconnected extremes influenced by climate change — from floods to droughts and heatwaves — are expected to intensify in the future in the Colorado River Basin. They found these sorts of concurrent extreme climatic events “are projected to increase in the future and intensify” in key regions of the watershed.

#Drought-free area returns to #Colorado – first since last July — The Kiowa County Press

From The Kiowa County Press:

Portions of Colorado saw slight improvements for drought conditions, with a small part of the state reaching drought-free status for the first time since mid-2020 according to the most recent reportion from the National Drought Mitigation Center.

Western Colorado continues to suffer under extreme and exceptional drought, with some additional area in severe conditions. Extreme drought is also impacting southern Las Animas, southwest Baca and central Kiowa counties.

Colorado Drought Monitor April 20, 2021.

North central and a small part of northeast Colorado improved for the week. Central Larimer County, along with northeast Boulder and a sliver of southwest Weld counties moved to drought-free conditions – the first time any part of the state has been free from drought or abnormally dry conditions since July 2020.

Much of western Logan County moved from moderate drought to being abnormally dry. A similar improvement was seen in western Weld County, along with portions of Boulder, Broomfield, Gilpin, Clear Creek, Jefferson, Adams, Arapahoe and Denver counties.

Further south, severe drought shifted to moderate conditions for northeast Park, southern Jefferson and most of Douglas counties.

Colorado drought one week change map ending April 20, 2021.

Conditions elsewhere in the state were unchanged this week.

Overall, one percent of Colorado is drought-free, while an additional 10 percent is abnormally dry, up from eight percent last week. Moderate drought covers 29 percent of the state, down from 31 percent, while severe conditions account for 28 percent, down from 30 percent. Extreme drought is present in 17 percent of Colorado, with 15 percent in exceptional conditions – both unchanged from the prior week.

#Drought and #snowpack: Recent cold and snow are just what April needs — The Ark Valley Voice

From The Ark Valley Voice (Tara Flanagan):

The truth is, cold and wet weather this time of year can buy some time for the snowpack, which began to recede earlier this month as the weather warmed. That’s fairly normal, albeit a tad on the early side. The question is, how fast it will melt off and how much of that mountain water will go where we need it most?

The easy answer, perhaps another snappy comeback, is that nobody knows for certain at this point. But after a 2020 that saw record wildfires in the state, a no-show for the mountain monsoons, this year parched soils will almost certainly suck up runoff as it travels toward waterways. In a best-case scenario, Chaffee County needs a cool spring, regular precipitation and not a lot of wind.

If it’s warm, dry, sunny, and windy, as was the case in early April, that’s another situation. “When you put all four of those together, that’s when you’re really losing snow,” said Chaffee County Commissioner Greg Felt. He’s a longtime river outfitter who sits on numerous water-related commissions, including the Colorado Water Conservation Board, and was recently appointed to the board of directors for the Southeastern Colorado Water Conservation District.

Felt said Chaffee County is looking relatively good in terms of municipal water supplies and assets coming into the Arkansas River for the summer season. That includes the significant supply from the Fry-Ark Project, which imports an average of 58,000 acre feet from the headwaters of the Fryingpan River to the Arkansas Basin. Waters from Fry-Ark get used for agriculture, well augmentation, and municipalities, as well as fisheries and meeting recreation goals in the Arkansas River Voluntary Flow Management Program. That program aims to keep minimum boating flows of 700 cubic feet per second(cfs) at the Wellsville Gauge each year between July 1 and Aug. 15.

Snowpack doesn’t guarantee stream flow, according to Felt. There’s the matter of soil condition and how much water it draws, as well as sublimation, where the snow is lost into warm, windy air.

So the past week’s cold and wet weather has been a blessing in that regard.

The Arkansas River Basin snowpack on April 1 was measuring at 105 percent of median, and to our south, the Upper Rio Grande was at 110 percent. To the west, the Gunnison River Basin lags at 89 percent of normal and has yet to stage a comeback.

The Front Range was certainly feeling less wrung-out after the record snowstorms in mid-March. The month came in as the second wettest March since 1872 and it toned down the U.S. Drought Monitor’s sea of red that depicted extreme drought in eastern Colorado. At the beginning of March, 99 percent of Colorado was in moderate drought or worse, with 56 percent in the extreme category.

Colorado Drought Monitor April 20, 2021.

As of April 15, however, 92 percent of Colorado remained in a moderate drought, and the extreme drought areas had scaled back to 32 percent. So the precipitation helped. The Drought Monitor is updated on Thursdays, so it’s too soon to say if the recent snow in the high country has changed the hot colors on the map.

It does appear that the precipitation and cold weather have boosted the snowpack for now. In the Arkansas River Basin, for example, snowpack was measuring at 77 percent of median on April 13, but was up to 85 percent April 20.

May Ranch receives #Colorado Leopold #Conservation Award — Sand County Foundation

Photo credit: May Ranch via The Conservation Fund

Here’s the release from the Sand County Foundation:

The May Ranch of Lamar has been selected as the recipient of the 2021 Colorado Leopold Conservation Award®.

Photo credit: May Ranch via The Conservation Fund

The May Ranch is owned and operated by the Dallas and Brenda May family of Prowers County. The conservation practices that the Mays have implemented on their cattle ranch have improved the wildlife habitat, water quality and grass and soil health.

The award, given in honor of renowned conservationist Aldo Leopold, recognizes ranchers, farmers, and forestland owners who inspire others with their voluntary conservation efforts on private, working lands.

The Mays will be presented with the award on Monday, June 21 at the Colorado Cattlemen’s Association’s 2021 Annual Convention held at the Double Tree by Hilton in Grand Junction.

In Colorado the award is presented annually by Sand County Foundation, American Farmland Trust, Colorado Cattlemen’s Association, Colorado Cattlemen’s Agricultural Land Trust, Tri-State Generation and Transmission Association, and USDA Natural Resources Conservation Service.

“The 2021 Leopold Conservation Award nominees and applicants showcased the diversity of agriculture in Colorado and the immense dedication farming and ranching families have to the lands they steward, their communities, and their families,” said Erik Glenn, Colorado Cattlemen’s Agricultural Land Trust Executive Director. “This year’s applicants featured an impressive array of families and operations from around the state. CCALT is proud of this year’s recipient the May Ranch and the entire May family.”

“Colorado farming and ranching families proudly produce the food that feeds the world and provide invaluable benefits to their communities and the environment. These contributions, in addition to outstanding stewardship practices and conservation achievements, are exemplified by all the Leopold Conservation Award applicants,” said Janie VanWinkle, Colorado Cattlemen’s Association President. “CCA warmly extends its congratulations to the May family on their well-deserved recognition, and being leaders in Colorado’s conservation and ranching industry.”

“Recipients of this award are real life examples of conservation-minded agriculture,” said Kevin McAleese, Sand County Foundation President and Chief Executive Officer. “These hard-working families are essential to our environment, food system and rural economy.”

“As the national sponsor for Sand County Foundation’s Leopold Conservation Award, American Farmland Trust celebrates the hard work and dedication of the Colorado recipient,” said John Piotti, AFT president and CEO. “At AFT we believe that conservation in agriculture requires a focus on the land, the practices and the people and this award recognizes the integral role of all three.”

Among the many outstanding landowners nominated for the award were finalists: Fetcher Ranch of Clark in Routt County, and LK Ranch of Meeker in Rio Blanco County.

The Leopold Conservation Award in Colorado is made possible thanks to the generous contributions from American Farmland Trust, Colorado Cattlemen’s Association, Colorado Cattlemen’s Agricultural Land Trust, Tri-State Generation and Transmission Association, USDA Natural Resources Conservation Service, Sand County Foundation, Stanko Ranch, Gates Family Foundation, American AgCredit, Colorado Department of Agriculture, The Bird Conservancy of the Rockies, The Nature Conservancy in Colorado, and McDonald’s.

Sand County Foundation presents the Leopold Conservation Award to landowners in 22 states for extraordinary achievement in voluntary conservation.

For more information on the award, visit http://www.leopoldconservationaward.org.

ABOUT MAY RANCH

“We understand that our ranch is not just a collection of land, plants, cattle, and wildlife,” says Dallas May, “but it is a community.”

Conserving that community in a sustainable way is a goal shared by Dallas and his wife Brenda, and the families of their grown children: Holly, Riley and Haley.

Intense pressures to develop native grasslands cannot compete with the family’s desire to protect their land’s biodiversity. The Mays have partnered with wildlife and conservation organizations that share their land ethic. Their collaborations have improved water quality and quantity by restoring streams, wetlands, and eight playas. Managed grazing on grasslands, installation of wildlife-friendly fencing, native tree plantings, and expanded watering locations have produced a model of how livestock and wildlife can thrive together.

The wetlands on May Ranch provide an oasis for migratory birds. Beef from their grass-fed cattle is marketed with a “Raised on Bird Friendly Land” label as part of the Audubon Society’s Conservation Ranching Program. Forty years of selective breeding of registered Limousin cattle has produced cattle with traits complimentary to grasslands and a semi-arid climate. Audubon Society guidelines track the ranch’s environmental sustainability, and health, welfare and feeding of the cattle. It’s just one way the Mays use third-party verifications to measure and manage conservation success.

Their property is monitored for rangeland health as part of an innovative carbon credit offset program that assigns a fair market value for sequestering carbon in the soil of grazing lands. May Ranch has hosted surveys of bird and botanical species, including when the Denver Botanical Gardens’ floristics team identified more than 90 plant species never documented in Prowers County. A conservation easement held by the Colorado Cattlemen’s Agricultural Land Trust ensures the operation will never lose its wildlife habitat and conservation values. Off the ranch, Dallas serves on a variety of community, water, and conservation committees and boards, including the Colorado Parks and Wildlife Commission.

Prior to 1994 the May’s cropland was irrigated entirely by flood irrigation. Since then, irrigation sprinklers have vastly improved their water efficiency, allowing them to raise more crops with less water. The Mays purchase composted manure from area dairy farms as fertilizer to grow corn and alfalfa that is sold as feed for the dairies. Following the corn harvest, turnips, field radishes, and winter rye are planted as cover crops to benefit the soil.

Conservation’s impact on the May Ranch is seen in ways large and small. There’s the seven miles of Big Sandy Creek that runs through the ranch. While this tributary of the Arkansas River has been reduced to pools of water and remnant patches of wetland elsewhere, its entire reach across the ranch contains surface water and healthy wetlands. Then there’s what a botanical survey discovered. The Wright’s false willow is the host plant on which painted grasshopper nymphs can feed.

“Even though it seems disproportionate to compare grasshopper nymphs and the small area they inhabit to miles of wetland and riparian areas and all of the associated species in that large landscape,” Dallas May said, “both contribute significantly to the diversity needed for a healthy and thriving ecosystem.”

Whether it is the ecosystem, community, or ranch, it’s in good hands with the May family.

# # #

LEOPOLD CONSERVATION AWARD PROGRAM

The Leopold Conservation Award is a competitive award that recognizes landowner achievement in voluntary conservation. Sand County Foundation, and national sponsor American Farmland Trust, present the award in California, Colorado, Kansas, Kentucky, Missouri, Montana, Nebraska, New Mexico, New York, North Dakota, Oklahoma, Pennsylvania, South Dakota, Texas, Utah, Wisconsin, and in New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont). http://www.leopoldconservationaward.org

New dust-on-snow monitoring technology coming to #SteamboatSprings lab, expanding a growing #snowpack data network — @AspenJournalism #runoff #ColoradoRiver #COriver #aridification

From Aspen Journalism (Natalie Keltner-McNeil):

Phenomenon drives earlier, more-intense spring runoff

The first automated dust-on-snow monitoring technology in the mountains of Northwest Colorado is expected to be installed this fall to study the impact of dust from arid landscapes on downwind mountain ecosystems in the state and in Utah.

McKenzie Skiles, who is a hydrologist and a University of Utah assistant professor, will use close to $10,000 from a National Science Foundation grant to purchase four pyranometers, which measure solar radiation landing on, and reflected by, snow.

These instruments will be placed on a data tower at Storm Peak Lab, a research station above Steamboat Springs that studies the properties of clouds, as well as natural and pollution-sourced particles in the atmosphere. The lab sits at 10,500 feet near the peak of Mount Werner at the top of Steamboat Resort in the Yampa River basin. Starting next winter, live information will be transmitted to MesoWest, a data platform at the University of Utah in Salt Lake City.

This station will be the latest added to a growing network of dust-on-snow monitoring towers across the state and Utah. Such stations offer key insights to researchers studying how dust impacts the timing and intensity of snowpack melt, Skiles said.

“My goal is to have a network of dust-on-snow observation sites that spans a latitudinal gradient in the Rockies and headwaters of the Colorado River,” Skiles said.

The Atwater study plot in the Wasatch Mountains of Utah, pictured in January, began transmitting data in 2019 and is operated by the Snow Hydro Lab at the University of Utah.
CREDIT: COURTESY PHOTO BY MCKENZIE SKILES

Five towers spread around Colorado and Utah currently take in data on the solar energy absorbed and reflected by the snow. Dust particles darken the snow’s surface then absorb more energy than clean snow does. Such a process changes light frequencies recorded by the pyranometers. Researchers take this frequency data and run it through models to quantify how much surface dust heats snow and speeds snowmelt.

Of the currently operating stations, one is near Crested Butte; one sits on Grand Mesa above Grand Junction; two are near Silverton; and one is in the Wasatch Mountains near Alta, Utah. The sites are run, respectively, by Irwin Mountain Guides; by the U.S. Geological Survey and a collaborative user group; by the nonprofit Center for Snow and Avalanche Studies; and by University of Utah researchers.

Stations were first established in the Senator Beck Basin, near Silverton in the San Juan Mountains, which is the Colorado range most immediately downwind from the deserts of the Colorado Plateau and receives the first dust — and the most dust. In analyzing data from the two radiation towers there, Skiles and colleagues revealed that dust on snow shortened the cover by 21 to 51 days and caused a faster, more-intense peak-snowmelt outflow. In a 2017 study that also analyzed data from Senator Beck Basin, Skiles showed that it was dust, not temperature, that influenced how fast snowpack melted and flowed into rivers downstream.

The Steamboat station will fill a gap in the locations of radiation towers, Skiles said.

“We know that a lot of dust comes from the southern Colorado Plateau and impacts the southern Colorado Rockies, but we don’t understand dust impacts as well in the northern Colorado Rockies,” she said.

Since there isn’t a data station in the northwest portion of the state, “The only way to know if there’s dust there is to go and dig a snow pit,” said Jeff Derry, executive director of the Center for Snow and Avalanche Studies.

CSAS runs the Colorado Dust on Snow program, or CODOS, which includes the two radiation towers in Senator Beck Basin.

University of Colorado hydrology students dig a snow pit in front of Storm Peak Lab in March 2013. The lab hosts research groups and students from around the world to study atmospheric and snow science.
CREDIT: COURTESY PHOTO BY GANNET HALLAR

Three times a year, usually in mid-March, April and May, CSAS staffers tour Colorado, digging snow pits at mountain locations to assess dust conditions statewide. Since dust events continue into May, this year’s conditions are currently hard to quantify, Derry said.

So far, this spring has been dustier than 2020; five dust events have hit the Senator Beck Basin as of April 14, compared with the three total dust events last year. As in years past, Senator Beck Basin has experienced more dust events than have the sites to the northeast, according to Derry in the latest CODOS update. Yet, a recent April storm distributed dust on all sites in the state.

Unlike the past few years, Rabbit Ears Pass — the CODOS sampling site closest to Steamboat Springs and located northwest of Bear Mountain along U.S. Highway 40 — has received at least as much dust as the Senator Beck Basin has, according to the CODOS update. As of the April 12 to 14 CODOS tour, two dust layers of moderate severity are present on the pass. That amount probably came from storms in the Uintah basin, in the Four Corners region and in Mexico’s Chihuahuan Desert, Derry said.

These dust layers will warm the snow and have an impact on snowmelt timing this runoff season, Derry said. In order to quantify that effect, radiation data from dust-on-snow study plots, like the one planned for Storm Peak, is needed.

Dust in arid landscapes — often disturbed by human activity — travels in wind currents during storms and is deposited on downwind mountains, Skiles said. The number of dust events and mass of dust carried in storms vary from year to year depending on wind speed, the intensity of drought and the frequency of human activities that disturb surface soils, said Janice Brahney, an assistant professor at Utah State University who studies nationwide dust composition and deposition patterns.

For instance, Senator Beck Basin experienced a peak in dust events from 2009 through 2014 and a decline in recent years. This decline is probably due to storms and winds that are not strong enough to carry and deposit dust into Colorado mountains, Brahney said.

“My sense is that a lot of the storms that are occurring in the southern United States are still occurring — they’re just not always reaching Colorado,” she said.

Dust covering snow near the Grand Mesa study plot on April 26, 2014. The Grand Mesa study plot was the third to be added to the network of dust on snow monitoring stations, and began transmitting solar radiation data in 2010.
CREDIT: COURTESY PHOTO BY THE CENTER FOR SNOW AND AVALANCHE STUDIES

Dust data will provide future insights for Steamboat water policy and management.

Skiles’ lab isn’t the only entity interested in the Storm Peak Lab dust-on-snow data. Kelly Romero-Heaney, water resources manager for the city of Steamboat Springs, anticipates using the data in the city’s next water-supply master plan.

“We update our water supply master plan at least every 10 years,” Romero-Heaney said. “So, even if it’s another eight years of data that’s needed before we can see measurable trends, by the time we update our models, we’ll be able to integrate that data.”

The most current plan, released in 2019, includes forecasts for Steamboat Springs’ water supply 50 years into the future. The plan — factoring in historic streamflow data and stressors to water supply such as climate change, wildfire and population growth — concluded that the city will meet its demands through 2070.

“One thing we’re fortunate in is that we have a relatively small community for a relatively large snowy water basin,” Romero-Heaney said.

Mount Werner Water and Sanitation District supplies the city with its water, derived primarily from Fish Creek and Long Lake reservoirs, said District General Manager Frank Alfone. In the summer months, the district also treats water from the Yampa River to meet irrigation demands, he said.

In order to predict Fish Creek and Long Lake reservoir levels, Alfone relies on data from the Buffalo Pass snowpack station, which is run by the Natural Resources Conservation Service, and on monthly water-supply forecasts from the National Oceanic and Atmospheric Association.

Alfone says dust on snow and the city’s water supply have “an impact now and more so in the future,” Alfone said.

Indeed, dust levels are expected to rise throughout the West. A 2013 study revealed that since 1994, dust deposition has increased in the region, with the majority of dust lifting from deserts in the Southwest and West, along with regions in the Great Plains and Columbia River Basin. This increase, according to the study, is probably due to heightened human disturbance of dry soils, which includes off-road-vehicle use, gas drilling, grazing and agriculture.

Increasing dust accelerates snowpack entrance into rivers, Skiles said. This earlier runoff lengthens the period when water can evaporate from rivers and lower streamflow, impacting water supply in the warmer months, according to her study,

“What we’re finding is that runoff is happening earlier and earlier each year, and that has real implications for us come August and September, particularly if we get very little rain throughout the summer season,” Romero-Heaney said.

Data from the widening dust-on-snow-monitoring network will aid water-resource managers and researchers in predicting how dust will shape future snowpack across Colorado.

“Dust does play a really significant role in hydrology. And that’s really important in the Western states, where we rely on the mountain snowpack not just for our own drinking water, but for our own functioning ecosystem,” said Brahney, lead author of the 2013 dust study.

“We anticipate some challenges for the whole basin, although we will still be able to reliably supply our customers with drinking water,” Romero-Heaney said.

This story ran in the Steamboat Pilot & Today on April 23.

Navajo Dam operations update: Release = 700 CFS April 24, 2021 #ColoradoRiver #SanJuanRiver #COriver #aridification

San Juan River. Photo credit: USFWS

From email from Reclamation (Susan Novak Behery):

In response to decreasing flows in the critical habitat reach, the Bureau of Reclamation has scheduled an increase in the release from Navajo Dam from 600 cubic feet per second (cfs) to 700 cfs on Saturday, April 24th, starting at 0400 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.

Opinion: Our rivers are not plumbing — Gunnison Country Times

Map of the Gunnison River drainage basin in Colorado, USA. Made using public domain USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69257550

From The Gunnison Country Times (Sam Liebl):

Near the tiny town of Red Cliff, three big cities conducted an experiment last fall. The Homestake Reservoir released a burst of water at the behest of the water utilities of Pueblo, Colorado Springs and Aurora. Their goal was simple: track a 1,600 acre-feet blob of water from the reservoir as it flowed to the Colorado state line.

The experiment’s results were unsettling. The subsequent report, released this month, is a reminder on this Earth Day that our Western Slope rivers — some of the most intensely managed and measured in the world — do not amount to plumbing. They are wild, complex and continue to baffle our models and controls.

Homestake Reservoir is one of the state’s many trans-mountain diversions. The man-made lake collects water from the Eagle River watershed. Pipes and tunnels send that water under the Continental Divide and into the Arkansas River near Leadville. Once in the Arkansas River, further diversions bring that water to the Front Range.

But water managers used Homestake to send the burst of water in the other direction, into the Colorado River via the Eagle River. They then carefully monitored gages to see if the water reached Utah, a tracking exercise that in the jargon of the field is called “water shepherding.”

But by the time the Homestake water reached the stateline, state engineers could not determine how much of the water completed the journey.

This conclusion should open our eyes to the uncertainty that climate change poses for the Gunnison Valley and for the rest of the Western Slope. If we can’t use our reservoirs to send water downstream with any kind of precision, our prospects of slaking the thirsts of downstream states look bleak.

he basis of much of our water management, and the reason for conducting the Homestake experiment, is the 1922 Colorado River Compact. The agreement among southwestern states requires that Colorado send a minimum amount of water downstream to Nevada, California and Arizona. If we fail to meet that target, federal reservoirs like Blue Mesa would be used to release more water. But we assumed in the 1950s and 60s, (when, to build Blue Mesa Reservoir, we destroyed thousands of acres of farmland, one of the world’s greatest trout fisheries, drowned the towns of Iola and Sapinero and wiped out half of the Gunnison sage-grouse’s best habitat) that we could get the water from point A to point B.

The Homestake experiment shows that we don’t have the ability to deliver a given amount of water downstream. We don’t know how we would guarantee a certain amount of water flowing downstream to Nevada, California and Arizona.

If, for instance, the Upper Gunnison River Basin was called upon to increase Colorado River flows downstream, it would be “extremely difficult to track or quantify” the delivery, said Frank Kugel, former General Manager of the Upper Gunnison River Water Conservancy District.

It would be a “mammoth task,” Kugel told me. The resulting higher river levels would lead to more water pouring through headgates and onto hay fields. Dry soils along the Gunnison and Taylor rivers would soak up some of the water. And then the three reservoirs and dams (Blue Mesa, Crystal, Morrow Point) in the Aspinall Unit would muddle the picture further. And that’s all before the Gunnison Tunnel would shunt hundreds of cubic feet per second into the Uncompahgre River Valley.

To just detect the delivery of water, much less to measure it, would require a very large release from the Upper Gunnison River Basin, Kugel told me.

Both Kugel, as well as Sonja Chavez, the current general manager at the Upper Gunnison River Water Conservancy District, told me that the difficulties of water shepherding contribute to their skepticism of “demand management” — a massive effort by Colorado water managers to determine how to best cut water use.

“The whole issue of shepherding is huge,” Chavez said. Demand management might sound good on paper, but the legal implications and the water shepherding implications throw doubt on the implementation of a statewide demand management program.

“The ability to track water that is conserved consumptive use all the way to the state line is really critical for the success of that program,” Colorado River District General Manager Andy Mueller told Aspen Journalism on the subject of the Homestake experiment. “And if you can’t track a slug of 1,600 acre-feet of water to the state line, how are you going to track the voluntary reduction in use of a small ditch on the West Slope that maybe they are saving 15 acre-feet?”

Water shepherding experiments will continue because the state has to figure out how to deliver more water downstream. Colorado has set its sights on storing 500,000 acre-feet of water in Lake Powell to protect against the increasingly likely scenario that too little water will flow to Nevada, California and Arizona. But, as shown in the Upper Gunnison River Water Conservancy District’s supply report for this week, that 500,000 acre-feet buffer may not be enough. Lake Powell will release about 8 million acre-feet this year. Only about 5 million acre-feet are expected to flow in.

“Throwing 500,000 acre feet down there will not do much if it stays hot and dry and if the flows do not materialize,” Chavez said.

Next time you drive by Blue Mesa Reservoir, this news may put its waters in a different light. We don’t know how to deliver water through rivers, but we do know how to dam them. And as Lake Powell is expected to fill to just 33% of capacity this year, our limited knowledge may not be enough.

Low #snowpack, exceptional #drought conditions “bad precursor for what is to come” — #Aspen Times #wildfire

Westwide SNOTEL basin-filled map April 23, 2021 via the NRCS.

From The Aspen Times (Jason Auslander):

With the snowpack and precipitation levels in Pitkin County below last year at this time, local officials are bracing for an active wildfire season this summer.

“We’re the only county in the northwest region (of the state) that did not deal with a significant wildfire last summer,” Valerie MacDonald, Pitkin County’s emergency manager, said Thursday. “We have no reason to believe our luck is going to hold. All the predictive services we use indicate that we’re going to have another bad wildfire season in Colorado.”

Currently, the snowpack in Pitkin County and most of the area west of the Continental Divide is at between 70% and 80% of the normal average, said Jeff Colton, a warning coordination meteorologist with the National Weather Service in Grand Junction. Last year, the snowpack at the end of February stood at 118% of normal.

In addition, precipitation this winter measured at the Aspen-Pitkin County airport is 3.27 inches of liquid compared with 3.45 inches last year at this time, he said. The average for this time of year is 4.69 inches.

Despite the larger than normal snowpack last year, it melted quickly and the monsoons never materialized, he said. Along with higher than normal temperatures, that led to about 2,300 wildfires in the Rocky Mountain region and more than 1 million acres burned, though those statistics are not yet available, Colton said…

Colorado Snowpack April 23, 2021 via the NRCS.

This year, the National Weather Service’s Climate Prediction Center is predicting that drought conditions will persist through June, traditionally the driest month of the year, he said. Also, the weather service is predicting a 65% chance that temperatures through June in Pitkin County will be above normal…

Colorado Drought Monitor April 20, 2021.

On the Western Slope, the snowpack isn’t melting as quickly this year as last, he said, while the monsoon season prediction this year is not as bad as last year…

MacDonald suggested going to http://www.pitkinwildfire.com — which features tips on how to protect property and people from wildfire in English and Spanish — for information on how to create defensible space and use fire resistant materials. Residents also should sign up for the Pitkin Alert system, which will keep residents informed of emergency situations, she said.

Tribal Water Rights & a Sustainable Vision for the #ColoradoRiver Basin (April 27, 2021) — @CUBoulderGWC #COriver #aridification

Many Indian reservations are located in or near contentious river basins where demand for water outstrips supply. Map courtesy of the Bureau of Reclamation.

Register here:

The 30 federally recognized tribes in the Colorado River Basin depend on the Colorado and its tributaries for a variety of purposes, including cultural and religious activities, domestic, irrigation, commercial, municipal and industrial, power generation, recreation, instream flows, wildlife, and habitat restoration. Twenty-two of these tribes have recognized rights to use 3.2 million-acre feet of Colorado River system water annually, or approximately 25 percent of the Basin’s average annual water supply. In addition, 12 of the tribes have unresolved water rights claims, which will likely increase the overall volume of tribal water rights in the Basin. With the oldest water rights in the basin, tribes are poised to play a significant role in balancing water demand and supply and otherwise shaping the future of the region. Join leaders of the Water & Tribes Initiative in a conversation about the role of tribes and other sovereigns and stakeholders in advancing a sustainable vision for the Colorado River.

Tuesday, April 27, 2021

Noon – 1:30 PM (Mountain Time)

Zoom Webinar

(Link provided upon registration confirmation and to the email provided)

April 20th, 2021 Navajo Unit Coordination Meeting slides and meeting minutes #SanJuanRiver #ColoradoRiver #COriver #aridification

From email from Reclamation (Susan Novak Behery):

Thank you for all who attended the April 20th, 2021 Navajo Unit Coordination Meeting. Please see the links below for the meeting summary and slides. Feel free to contact me with any questions or comments. The next meeting is scheduled for August 24th, 2021 at 1:00 PM.

Meeting Minutes
Meeting Slides

White House Launches Drought Relief Working Group to Address Urgency of Western #Water Crisis

A new computer model of climate effects and human economic activity reveals weaknesses and strengths of hundreds of river and water basins across the globe, as we face increasing levels of climate stress (source: Drought.gov)

Here’s the release from the Department of Interior:

Interagency effort will coordinate resources across the federal government to bring immediate relief to irrigators, Tribes, and western communities

The Biden-Harris administration today announced the formation of an Interagency Working Group to address worsening drought conditions in the West and support farmers, Tribes, and communities impacted by ongoing water shortages. The Working Group will be co-chaired by the Departments of the Interior and Agriculture to build upon existing resources to help coordinate across the federal government, working in partnership with state, local, and Tribal governments to address the needs of communities suffering from drought-related impacts. The White House released a readout from today’s National Climate Task Force Meeting announcing the new Working Group.

“Water is a sacred resource. This Interagency Working Group will deliver a much-needed proactive approach to providing drought assistance to U.S. communities, including efforts to build long-term resiliency to water shortages,” said Interior Secretary Deb Haaland. “We are committed to using every resource available to our bureaus to ensure that Tribes, irrigators and the adjoining communities receive adequate assistance and support.”

“In the United States, intense droughts threaten major economic drivers in rural communities such as agriculture and recreation, disrupts food systems and water supplies, endangers public health, jeopardizes the integrity of critical infrastructure, and exacerbates wildfires and floods. With our interagency Working Group, we will collaborate with Tribes, agricultural producers, landowners, and rural communities to build regional resilience to drought,” said Agriculture Secretary Tom Vilsack.

Water allocations are at historic lows, including in areas like the Klamath River Basin and the Colorado River Basin, creating an urgent need to minimize the impacts of the drought and develop a long-term plan to facilitate conservation and economic growth. The Working Group will work to identify immediate financial and technical assistance for impacted irrigators and Tribes. Development of longer-term measures to respond to climate change and build more resilient communities and protect the natural environment will also be a priority, including through President Biden’s proposed American Jobs Plan and through a recommitment to strengthening the National Drought Resilience Partnership (NDRP). Formed in 2013, the NDRP brings together multiple federal agencies to build long-term drought resilience, including developing innovative science-driven actions to address water supply challenges.

Statement from Former Vice President Al Gore on the U.S. Nationally Determined Contribution #EarthDay

Al Gore at a Climate Reality Leadership Corps training.

From Al Gore:

Almost five and a half years ago in Paris, the world finally committed to take bold action to address the climate crisis. But even then, leaders knew the commitments were not enough to meet the urgency of the challenge we face. If we want to avoid the most catastrophic impacts of climate change, we must work to limit the global temperature rise to 1.5 degrees Celsius. That means we need significant emissions cuts not in 20 or 30 years, but in this decade.

Today, President Biden showed that his administration is up to the task of tackling the climate crisis by announcing his commitment to reduce the United States’ greenhouse gas emissions 50-52% by 2030. This is a groundbreaking step for our country – the world’s second largest emitter of global warming pollution – and is a strong signal to leaders around the world that as a global community, we have no more time to waste. This ambitious goal is one that we must reach. I know that with the Biden Administration’s whole-of-government approach, paired with investments in green jobs and infrastructure under consideration in Congress, we can.

The eyes of the world, and particularly those of the youngest generations, are on leaders in government, the private sector, and civil society to deliver plans by the next climate talks in Glasgow that finally meet this moment and create the sustainable and just future the people of this planet deserve. I am encouraged by the latest commitments from other nations and strongly urge more leaders to heed the United States’ example and make similarly bold emissions reduction plans so that we can finally turn the tide on the climate crisis.

#Drought news (April 22, 2021): Improvements noted in the #SouthPlatteRiver Basin

Click on a thumbnail graphic to view a gallery of drought data from the US Drought Monitor.

Click here to go to the US Drought Monitor website. Here’s an excerpt:

This Week’s Drought Summary

The upper-level circulation over the contiguous U.S. (CONUS) during this U.S. Drought Monitor (USDM) week consisted of a ridge over the West Coast and trough over the north central states. Strong closed lows rotated within this upper-level flow, bounding from the Southwest to the Northeast in their trek across the country. The ridge blocked Pacific moisture from entering the country and kept the West Coast warmer than normal for the week. The trough funneled cold and dry Canadian air into the Plains. The cold fronts moved south and east, bringing colder-than-normal air to much of the CONUS from the Great Basin to the Appalachians and beyond to the Mid-Atlantic Coast. Only parts of the Southeast and Northeast averaged warmer than normal for the week. The fronts and their surface lows brought rain and snow to the northern and central Rockies as they bumped up against the mountains, with precipitation amounts meeting or exceeding weekly normals in parts of the northern to central Rockies and High Plains. The fronts and surface lows spread above-normal rainfall across Oklahoma and northern Texas to Florida, with amounts along the northern Gulf Coast exceeding 5 inches in places. They also brought rain to the Northeast, with some areas nearing or exceeding weekly normals. But much of the West, northern Plains to Ohio Valley, Southeast, and Maine were drier than normal for the week. Streamflow was well below normal all along the West Coast and in the interior West, in North Dakota and northwest South Dakota, parts of southern Texas, the southern and eastern Great Lakes, and parts of the Northeast. Soils continued to dry out in the West and Southeast, according to U.S. Department of Agriculture (USDA) reports. Satellite and station reports, as well as modeled indices, showed dry soils across the West, northern and southern Plains, the southern and eastern Great Lakes, and into the Northeast, as well as parts of the Southeast. Groundwater observations from wells and estimated from satellite measurements revealed dry conditions across the West, northern and southern Plains, Northeast, and parts of the Southeast. The cumulative effect of lack of precipitation and drying soils has stressed vegetation, as seen in such indices as the Vegetative Health Index and VegDRI, as well as field reports…

Colorado drought one week change map ending April 20, 2021.

High Plains

Cooler temperatures and snow spread across parts of the northern Plains this week. Western and southern parts of the High Plains region received 0.5-1.5 inches of precipitation this week, while the Dakotas were mostly dry with less than 0.25 inch. Precipitation in Wyoming in recent weeks has improved several drought indicators, especially the Standardized Precipitation Index (SPI), resulting in significant contraction of the D3 area in the central part of the state. D0-D2 shrank in other parts, but D1-D2 expanded in western Wyoming. Colorado saw contraction of D1-D2 in the north. Half an inch to over an inch of precipitation in southwest South Dakota shrank D2, while D2 was removed from southeast South Dakota due to improving indicators. Even though much of Montana received welcome snow this week, in most areas it amounted to below-normal precipitation, so D1-D3 expanded. Abnormal dryness contracted in south central Montana where precipitation has been above normal. In North Dakota, the snow was enough to prevent further deterioration but not enough to reduce deficits. Parts of the state remain in a burn ban and are experiencing dry soils, poor pasture conditions, and drying ponds and dugouts, some of which were testing high in TDS and sulfates. Producers are selling or making plans to cull more livestock. Dust storms have been reported recently in North Dakota and Montana. USDA reports show 78% of North Dakota, 61% of Montana, 58% of South Dakota, 56% of Wyoming, and 49% of Colorado with topsoil moisture short or very short…

West

Just the higher mountains of northern Utah, northeast Nevada, and the Sierra Nevada in California received any precipitation this week, and that was only 0.25-1.5 inches, which was barely normal for this time of year. Most of the rest of the West received no precipitation. Low streamflow, dry soils, and precipitation deficits over the last 3 months or longer prompted expansion of abnormal dryness and drought all along the West Coast. In Washington, D0 expanded to the coast and D1 spread northeastward, with only above-normal snow water content (SWE) and water-year-to-date (WYTD) precipitation keeping the Olympic and Cascade Mountains free of abnormal dryness. The D1, and some D0, spread across northern Idaho and into northwest Montana. D1-D2 expanded in western and northeastern Oregon. D1-D3 expanded in California to better reflect the soil moisture, streamflow, and SPI indicators. Agricultural impacts along the southern California coast were especially severe. The sparse timing of rain that has occurred this season (end of December and end of January) has contributed to especially poor growth of the annual grasses that are needed for livestock feed. According to reports, the amount of forage on rangelands is low, with producers in Ventura County already shipping whole herds of cattle out of county because there is almost no forage. As the USDM week ended, California Governor Newsom declared a drought emergency in Mendocino and Sonoma counties. Other drought impacts around the region: Historically low water levels caused the closure of some launch ramps on Lake Powell. The Klamath Project will receive 33,000 acre-feet of water in 2021, about one-tenth the average amount, for the lowest allocation in the project’s history, due to drought and low inflows into Upper Klamath Lake. Dust storms have been reported recently in Oregon and blowing dust in eastern Washington. According to USDA reports, the percentage of topsoil moisture short or very short jumped this week to 65% of California and Oregon and 60% of Washington. The percentage increased slightly to 87% of New Mexico. April 21 reports of mountain SWE in California included 32% of normal in the North, 37% in the Central, and 16% in the South…

South

Heavy rains fell across frontal zones over Louisiana and southern Mississippi where up to 5 inches was reported for the week. Rainfall totals of 2 inches or more covered most of Louisiana into northeast Texas and parts of Oklahoma. Half an inch or more was widespread across Arkansas, eastern to central Oklahoma, and northern, eastern, and extreme southern Texas. Meanwhile, most of the Rio Grande Valley, west Texas, and western Oklahoma received little to no precipitation. Drought and abnormal dryness contracted in parts of Louisiana, Oklahoma, and Texas, while extreme (D3) to exceptional (D4) drought expanded in parts of west Texas. The rains improved soils across parts of Texas and Oklahoma, but USDA reports still have 60% of Texas and 26% of Oklahoma with topsoil moisture short or very short…

Looking Ahead

A weather system moved across the Northeast as this USDM week ended and the new week began. During April 22-27, the western ridge will break down, allowing a couple weather systems to move across the CONUS. One will move across the South and Southeast at mid-week, while another moves into the West as the USDM week ends. Much of the CONUS is expected to receive 0.10-0.25 inch of precipitation, with 1.0-2.0 inches in the mountains of the Coastal, Cascade, and Sierra Nevada ranges and northern Rockies. But the heaviest precipitation will be from eastern Texas to South Carolina, and southeast Kansas to southern Illinois, where 1.0-3.0 inches is forecast to fall. An inch or more is expected across a broad area from eastern portions of Texas, Oklahoma, and Kansas, across the Ohio Valley, to the Mid-Atlantic coast; south to the Gulf of Mexico coast; and across New England. Temperatures are expected to be cooler than normal in the east as the Canadian air masses exit the CONUS, then moderate to near to warmer than normal CONUS-wide. The outlook for April 28-May 1 warmer than normal in the East and cooler than normal in the Pacific Northwest. Odds favor wetter-than-normal conditions in the Pacific Northwest; along the Mississippi, Ohio, and Tennessee Valleys; and in the Great Lakes; with below-normal precipitation in most of the southern Plains. In Alaska, odds favor below-normal precipitation across the state except the panhandle, warmer-than-normal temperatures in the west, and cooler-than-normal temperatures in the east.

US Drought Monitor one week change map ending April 20, 2021.

Compromise Will Bring Conclusion to Federal Lawsuit on Chimney Hollow Reservoir — @Northern_Water

This graphic, provided by Northern Water, depicts Chimney Hollow Reservoir, located southwest of Loveland, after it is built.

Here’s the release from Northern Water:

The Northern Water Municipal Subdistrict has voted to approve a settlement of a federal lawsuit over Chimney Hollow Reservoir.

In a meeting Wednesday, the Municipal Subdistrict Board voted 10-1 to authorize its participation in the settlement.

The settlement means construction of Chimney Hollow Reservoir will begin this summer and the Colorado River Connectivity Channel in Grand County next year. In return, the Municipal Subdistrict will contribute $15 million to a foundation to pay for projects that enhance the Colorado River and its many watersheds in Grand County.

“This settlement shows there is an alternative to costly litigation that can provide benefits both to the environment in Grand County and the Colorado River, as well as acknowledging the need for water storage,” said Northern Water General Manager Brad Wind.

The compromise will bring to a close a lawsuit in federal court filed by Save the Colorado, Save the Poudre, WildEarth Guardians, Living Rivers, Waterkeeper Alliance and the Sierra Club in October 2017. The suit challenged the permit issued by the Bureau of Reclamation and Army Corps of Engineers for the construction of Chimney Hollow Reservoir. On Dec. 19, 2020, the federal court ruled against the environmental organizations. The ruling was then appealed in February, and as part of the appeals process, both sides were required to engage in court-ordered mediation, which resulted in this settlement.

Chimney Hollow Reservoir, the key component to the Windy Gap Firming Project, will bring a reliable water supply to the 12 municipalities, water providers and utilities paying for its construction as well as provide a much-needed recreation area to be managed by the Larimer County Department of Natural Resources. Chimney Hollow Reservoir will be located in a dry valley just west of Carter Lake in southwest Larimer County and will store 90,000 acre-feet of water from the Windy Gap Project for use by 12 participants, including Broomfield, Platte River Power Authority, Longmont, Loveland, Greeley, Erie, Little Thompson Water District, Superior, Louisville, Fort Lupton, Lafayette and the Central Weld County Water District. Chimney Hollow Reservoir will make the Windy Gap water supply serving those participants more reliable and meet a portion of their long-term water supply needs. Each participant will also enact a water conservation plan to comply with state law and permit requirements.

The compromise will also move forward other environmental measures related to the Project, including the Colorado River Connectivity Channel, a newly proposed channel around the existing Windy Gap Reservoir to reconnect the Colorado River above and below the reservoir. The channel will restore the ability for fish, macroinvertebrates, nutrients and sediment in the river to bypass the reservoir. Many other environmental protections are included, such as improving streamflow and aquatic habitat in the Colorado River, addressing water quality issues, providing West Slope water supplies and more.

The Northern Water Municipal Subdistrict negotiated with Colorado River stakeholders to develop this package of environmental protections and received a permit from Grand County and approvals from others, including Trout Unlimited and the State of Colorado, to move forward with the Project.

Water storage such as Chimney Hollow Reservoir was specifically identified in the Colorado Water Plan as a necessary component for Colorado’s long-term water future. It joins conservation, land use planning and other solutions to meet future water needs in the state. To learn more about the project, go to http://www.chimneyhollow.org.

From The Colorado Sun (Michael Booth):

Northern Water will begin construction of the 25-story Chimney Hollow dam this summer.

complex Front Range dam-building project that includes transferring water from the Colorado River will move forward this summer after Northern Water agreed to a settlement putting $15 million in trust for waterway improvements in Grand County.

Environmental opponents begrudgingly accepted the mediated settlement of their lawsuit against Northern Water’s Windy Gap Firming Project, which involves a menu of waterworks construction including Chimney Hollow dam near Loveland and rerouting the Colorado River around Windy Gap Dam near Granby.

The settlement resolves litigation in the federal 10th Circuit Court of Appeals, and Northern Water said it now can begin construction of the 25-story Chimney Hollow dam this summer. The dam will plug the northern end of a dry valley northwest of Carter Lake. It will eventually be filled using Colorado River rights purchased by municipalities that are members of Northern Water. The Northern Water rights can be tapped only when Grand County is wet enough to supply other, higher priorities first…

An alliance of environmental groups opposing the project wants to stop any more transfers of Western Slope water, which would ordinarily flow west in the Colorado River, to Front Range reservoirs that supply growing Colorado cities and suburbs.

In the case of Chimney Hollow and Windy Gap, the environmentalists say damage has already been done to the Colorado River in Grand County, and the settlement can help them reverse some of the hurt…

An aerial view of Windy Gap Reservoir, near Granby. The reservoir is on the main stem of the Colorado River, below where the Fraser River flows into the Colorado. Water from Windy Gap is pumped up to Lake Granby and Grand Lake, and then sent to the northern Front Range through the Adams Tunnel. Photo credit: Aspen Journalism

The Northern Water Municipal Subdistrict Board voted 10-1 Wednesday to participate in the settlement. A federal district court had rejected the environmental groups’ challenge of permits for the Windy Gap and Chimney Hollow projects issued by Army Corps of Engineers, and mediation was required as part of the appeal.

Chimney Hollow water will be used by 12 of Northern Water’s members: Central Weld County Water District, Little Thompson Water District and the Platte River Power Authority, and the cities of Broomfield, Erie, Fort Lupton, Greeley, Lafayette, Longmont, Louisville, Loveland and Superior. The members say they need more water storage to accommodate future growth in homes, industry and agriculture.

This graphic from Northern Water shows the lay out of the Windy Gap Firming Project. The River District has voted to spend $1 million on the Colorado River Connectivity Channel, an aspect of the project meant to mitigate impacts from the dam and reservoir.

From KUNC (Luke Runyon):

Environmental groups, including WildEarth Guardians, Save the Colorado, Save The Poudre, Sierra Club, Living Rivers, and the Waterkeeper Alliance, filed a lawsuit in Oct. 2017 challenging the project’s federal permits. A federal judge in Dec. 2020 ruled against the environmental groups.

In a settlement reached with Northern Water — the agency pursuing Windy Gap on behalf of a municipal subdistrict of Front Range water providers — the environmental coalition agreed to withdraw their lawsuit, while securing $15 million for projects aimed at improving water quality, river health and fish habitat. The Grand Foundation in Grand County, Colo. will be the recipient of those funds. An advisory panel will be made up of representatives appointed by Northern Water and the environmental groups, and will decide how the money is spent. The funds will be issued in installments as the project is built…

The additional environmental mitigation joins other projects already negotiated between Grand County, Trout Unlimited and Northern Water, among other partners…

That previously agreed to package of environmental mitigation includes the Colorado River Connectivity Channel, which is to be constructed around the existing Windy Gap dam and reservoir, and is designed to reconnect a portion of the Colorado River below its confluence with the Fraser River. The channel is meant to allow for more natural conditions to return, like allowing sediment to move downstream and providing more habitat for fish and aquatic insects. Monitoring programs and riparian restoration were also a part of the deal negotiated among those parties.

The connectivity channel was a recent recipient of a $1 million grant from the Colorado River District, becoming the first project to receive funds generated from ballot question 7A which appeared on the Nov. 2020 ballot in the district’s boundaries…

Despite the additional funding, representatives from the environmental coalition that sued to halt construction remained alarmed about the project’s legal success, and said the $15 million is a drop in the bucket…

Northern Water plans to begin construction on the Chimney Hollow dam this summer and on the Colorado River Connectivity Channel in 2022.

Navajo Dam operations update (April 21, 2021) #SanJuanRiver #ColoradoRiver #COriver #aridification

The San Juan River, below Navajo Reservoir. Photo: Brent Gardner-Smith/Aspen Journalism

From email from the Bureau of Reclamation (Susan Novak Behery):

In response to decreasing flows in the critical habitat reach, the Bureau of Reclamation has scheduled an increase in the release from Navajo Dam from 500 cubic feet per second (cfs) to 600 cfs on Wednesday, April 21st, starting at 12:00 PM. 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.

Large Decreases in Upper Colorado River Salinity Since 1929 — @USGS

Here’s the release from the USGS (Heidi Koontz):

Salinity levels in the Upper Colorado River Basin, which covers portions of Wyoming, Colorado, Utah, Arizona and New Mexico, have steadily decreased since 1929, according to a new U.S. Geological Survey study analyzing decades of water-quality measurements.

Photo credit: USGS

Salinity is the concentration of dissolved salt in water. High salinity levels in the Colorado River Basin cause an estimated $300-400 million per year in economic damages across U.S. agricultural, municipal and industrial sectors, as well as negatively impact municipal and agricultural users in Mexico. Reducing high salinity levels can benefit crop production, and decrease water treatment costs and damage to water supply infrastructure.

Findings indicate that large, widespread and sustained downward trends in salinity occurred over the last 50 to 90 years, with salinity levels decreasing by as much as 50% at some locations. The timing and amount of salinity reductions suggest that changes in land cover, land use and climate, in addition to salinity-control measures, substantially affect how dissolved salts find their way into streams that feed the basin.

“Identifying the causes of dropping salinity levels will be important for water managers in the basin so they can anticipate future changes in salinity and optimize salinity-control practices going forward,” said Christine Rumsey, USGS scientist and lead author of the study.

Results show the steepest rates of decline in salinity occurred from 1980 to 2000, coincident with the initiation of salinity-control efforts in the 1980s. However, there has been a consistent slowing of downward trends after 2000 even though salinity-control efforts continued. Significant decreases in salinity occurred as early as the 1940s in some streams, indicating that, in addition to salinity-control projects, other watershed factors are important drivers of salinity change.

“Having access to almost a century’s worth of salinity data provides greater insight to the water-quality changes that occurred prior to the implementation of salinity-control projects,” said Don Barnett, Executive Director of the Colorado River Basin Salinity Control Forum. “These findings are key in helping us understand the processes that cause and reduce salinity and assist us in our goal of protecting water quality in the Colorado River.”

Salinity occurs naturally in water due to weathering and the breaking down of minerals in soils and rock. The same process occurs in areas with irrigated agriculture, when irrigation water flows through soils and dissolves salts which eventually travel into streams. Irrigated areas contribute significantly more to stream salinity compared to areas without irrigated agriculture. Other factors known to affect salinity include geology, land cover, land-use practices, precipitation and climate.

“These findings indicate the issue of salinity in the Colorado River Basin is very complex,” said Rumsey. “Further work is needed to better understand the roles that climate change, land-use, reservoirs, population dynamics and irrigation practices play in salinity issues, which impact the economic well-being of the West and are important to U.S. relations with Mexico.”

Funding for this study was provided by the Colorado River Basin Salinity Control Program, the Bureau of Reclamation and the Bureau of Land Management. In 1974, Congress enacted the Colorado River Basin Salinity Control Act, which directed the Secretary of the Interior to proceed with a program to enhance and protect the quality of water available in the Colorado River for use in the U. S. and Republic of Mexico. The Colorado River Basin Salinity Control Program implements and manages programs to reduce salinity loads, investing millions of dollars per year in irrigation upgrades, canal projects and other mitigation strategies.

The USGS is the primary scientific agency for collecting data on water quality and flow in the nation’s rivers, with more than 13,500 real-time stream, lake and reservoir, precipitation and groundwater data stations across the country. The USGS also conducts analyses of these data to evaluate the status and trends of water-quality conditions.

The new study was published in the journal Water Resources Research.

Landscape view of the San Rafael River in Utah.
Courtesy: Wyatt Brown. Public Domain.
White salts covers the surface of the San Rafael Swell, Utah.
​​​​​​​Credit: USGS. Public domain.

Interstate #water wars are heating up along with the #climate — The Conversation


Aerial view of Lake Powell on the Colorado River along the Arizona-Utah border.
AP Photo/John Antczak

Robert Glennon, University of Arizona

Interstate water disputes are as American as apple pie. States often think a neighboring state is using more than its fair share from a river, lake or aquifer that crosses borders.

Currently the U.S. Supreme Court has on its docket a case between Texas, New Mexico and Colorado and another one between Mississippi and Tennessee. The court has already ruled this term on cases pitting Texas against New Mexico and Florida against Georgia.

Climate stresses are raising the stakes. Rising temperatures require farmers to use more water to grow the same amount of crops. Prolonged and severe droughts decrease available supplies. Wildfires are burning hotter and lasting longer. Fires bake the soil, reducing forests’ ability to hold water, increasing evaporation from barren land and compromising water supplies.

As a longtime observer of interstate water negotiations, I see a basic problem: In some cases, more water rights exist on paper than as wet water – even before factoring in shortages caused by climate change and other stresses. In my view, states should put at least as much effort into reducing water use as they do into litigation, because there are no guaranteed winners in water lawsuits.

Dry times in the West

The situation is most urgent in California and the Southwest, which currently face “extreme or exceptional” drought conditions. California’s reservoirs are half-empty at the end of the rainy season. The Sierra snowpack sits at 60% of normal. In March 2021, federal and state agencies that oversee California’s Central Valley Project and State Water Project – regional water systems that each cover hundreds of miles – issued “remarkably bleak warnings” about cutbacks to farmers’ water allocations.

The Colorado River Basin is mired in a drought that began in 2000. Experts disagree as to how long it could last. What’s certain is that the “Law of the River” – the body of rules, regulations and laws governing the Colorado River – has allocated more water to the states than the river reliably provides.

The 1922 Colorado River Compact allocated 7.5 million acre-feet (one acre-foot is roughly 325,000 gallons) to California, Nevada and Arizona, and another 7.5 million acre-feet to Utah, Wyoming, Colorado and New Mexico. A treaty with Mexico secured that country 1.5 million acre-feet, for a total of 16.5 million acre-feet. However, estimates based on tree ring analysis have determined that the actual yearly flow of the river over the last 1,200 years is roughly 14.6 million acre-feet.

The inevitable train wreck has not yet happened, for two reasons. First, Lakes Mead and Powell – the two largest reservoirs on the Colorado – can hold a combined 56 million acre-feet, roughly four times the river’s annual flow.

But diversions and increased evaporation due to drought are reducing water levels in the reservoirs. As of Dec. 16, 2020, both lakes were less than half full.

Second, the Upper Basin states – Utah, Wyoming, Colorado and New Mexico – have never used their full allotment. Now, however, they want to use more water. Wyoming has several new dams on the drawing board. So does Colorado, which is also planning a new diversion from the headwaters of the Colorado River to Denver and other cities on the Rocky Mountains’ east slope.

Much of the U.S. Southwest and California are in extreme or exceptional drought.
Drought conditions in the continental U.S. on April 13, 2021.
U.S. Drought Monitor, CC BY-ND

Utah stakes a claim

The most controversial proposal comes from one of the nation’s fastest-growing areas: St. George, Utah, home to approximately 90,000 residents and lots of golf courses. St. George has very high water consumption rates and very low water prices. The city is proposing to augment its water supply with a 140-mile pipeline from Lake Powell, which would carry 86,000 acre-feet per year.

Truth be told, that’s not a lot of water, and it would not exceed Utah’s unused allocation from the Colorado River. But the six other Colorado River Basin states have protested as though St. George were asking for their firstborn child.

In a joint letter dated Sept. 8, 2020, the other states implored the Interior Department to refrain from issuing a final environmental review of the pipeline until all seven states could “reach consensus regarding legal and operational concerns.” The letter explicitly threatened a high “probability of multi-year litigation.”

Utah blinked. Having earlier insisted on an expedited pipeline review, the state asked federal officials on Sept. 24, 2020 to delay a decision. But Utah has not given up: In March 2021, Gov. Spencer Cox signed a bill creating a Colorado River Authority of Utah, armed with a US$9 million legal defense fund, to protect Utah’s share of Colorado River water. One observer predicted “huge, huge litigation.”

How huge could it be? In 1930, Arizona sued California in an epic battle that did not end until 2006. Arizona prevailed by finally securing a fixed allocation from the water apportioned to California, Nevada and Arizona.

Southwest Utah’s claim to Colorado River water is sparking conflict with other western states.

Litigation or conservation

Before Utah takes the precipitous step of appealing to the Supreme Court under the court’s original jurisdiction over disputes between states, it might explore other solutions. Water conservation and reuse make obvious sense in St. George, where per-person water consumption is among the nation’s highest.

St. George could emulate its neighbor, Las Vegas, which has paid residents up to $3 per square foot to rip out lawns and replace them with native desert landscaping. In April 2021 Las Vegas went further, asking the Nevada Legislature to outlaw ornamental grass.

The Southern Nevada Water Authority estimates that the Las Vegas metropolitan area has eight square miles of “nonfunctional turf” – grass that no one ever walks on except the person who cuts it. Removing it would reduce the region’s water consumption by 15%.

Water rights litigation is fraught with uncertainty. Just ask Florida, which thought it had a strong case that Georgia’s water diversions from the Apalachicola-Chattahoochee-Flint River Basin were harming its oyster fishery downstream.

That case extended over 20 years before the U.S. Supreme Court ended the final chapter in April 2021. The court used a procedural rule that places the burden on plaintiffs to provide “clear and convincing evidence.” Florida failed to convince the court, and walked away with nothing.The Conversation

Robert Glennon, Regents Professor and Morris K. Udall Professor of Law & Public Policy, University of Arizona

This article is republished from The Conversation under a Creative Commons license. Read the original article.

#Snowpack news (April 20, 2021): Early peaks are the norm

Click on a thumbnail graphic to view a gallery of snowpack data from the NRCS.

Here’s the Westwide SNOTEL basin-filled map.

Westwide SNOTEL basin-filled map April 20, 2021 via the NRCS.

Dear 2021 #Monsoon: Don’t be lame again this year #cwcbwatf

This pretty much sums up the mood at today’s DNR Water Availability Task Force Meeting.

Saving the #ColoradoRiver — James Eklund #COriver #aridification #DemandManagement

From James Eklund (click through for the citations):

How demand management can save the Colorado River

In 1887, after a week at sea, my great-great grandmother Mary Gunderson led her blind husband, Ole, down the gangplank into New York City. Ole was the victim of a mining accident only days before their scheduled departure for America. The economy in Norway had collapsed and the couple sought a brighter future for their two young sons. The family made its way to the new (then twelve-years-old) state of Colorado to homestead on a tributary to the Grand River. The federal government had recently removed the indigenous Ute peoples from the land and opened it to homesteading. The river that dominated this landscape has carried many names, among them Rio del Tizon, the Grand River, and the Colorado River. For eleven years, 1873-1883, the river’s performance was below what once was considered average (i.e. the average flow of the river 1906-1995). (Woodhouse, 2006). When the Gundersons arrived, the flows had returned to average and were about to enter a wet period that would form the backdrop for the consequential first round of modern management negotiations. (Woodhouse, 2006).

The river that carved the Grand Canyon now shaped new economies — economies that quickly grew too big to fail. Westerners sought ways to control and harness the river while confronting legal and hydrologic uncertainty. In 1922, the seven sovereign Basin States achieved a form of legal certainty through an interstate compact expressly consented to by Congress. The Colorado River Compact (Compact) was the first interstate compact apportioning water use in the nation’s history. The Compact divided the river basin in two, apportioning Colorado River system water use between the Upper Basin and the Lower Basin. (The Upper Basin includes: Colorado, New Mexico, Utah and Wyoming; while the Lower Basin includes: Arizona, California and Nevada) The basin states and the federal government adopted agreements, laws, policies, and practices based on their understanding of the river’s historic performance. Taken together, these instruments constitute what is now known as the “Law of the River.” In 1935, a measure of hydrologic certainty was achieved, for the Lower Basin, with the filling of Lake Mead behind Hoover Dam. If the compact negotiators had been correct in their assumption that Colorado River flows would remain stationary, this article would end here. You, dear reader, are not so fortunate.

Anthropomorphic climate change has fundamentally shifted Colorado River hydrology and the foundation upon which the Law of the River was built. The once average annual river inflows of 18 million acre-feet were experienced and assumed by interstate negotiators — while we now only see 12.5 million acre-feet. In addition, more carbon in our atmosphere is producing warmer temperatures. Consequently, not only are we receiving less precipitation, but more of what we do receive falls in the form of rain instead of snow.

Moreover, snowpack behavior, once considered somewhat predictable and reliable, is now dramatically underperforming. In the 2020 water year, the Upper Basin saw above average snowpack (114%) misbehave to such an extent that it produced a mere 55% of average runoff. (Milly, 2020). These trends can be expected to continue. (Plucinski, 2019). Reasons for this are, firstly, the “aridification” of the Colorado River Basin, where temperature has risen and is rising such that sublimation occurs at higher rates and liquid water fails to occur. The second reason is the “spongeification” of the Colorado River Plateau whereby dry soils and depleted groundwater aquifers soak up the runoff that does materialize.

Nevertheless, the demands placed and the economies reliant on the Colorado River are still too big to fail. Our challenge, therefore, is to shift the Law of the River to accommodate the change in hydrology and encourage practices that can help save the river. Too small a shift risks failing to adequately address the challenge. A larger — perhaps necessary — response may upset the carefully crafted agreements that sovereigns and stakeholders throughout the basin have labored to reach. Unfortunately, the latest data and analysis shows we must prepare for river flows reduced by climate change.

Readying the Colorado River system and the 40 million people reliant on the river in seven states, two countries, and numerous American Indian Tribes requires a rethinking of the fundamental terms of the Law of the River. The picture can seem bleak and depressing — but take heart! These challenges also represent excellent opportunities to develop more reliable and sustainable Colorado River management. We can manage our way out of this problem while addressing climate change, thus saving the Colorado River for future generations. Demand management is a necessary management tool that we should be wielding with greater urgency.

The Effects of Climate Change on the Colorado River

Anthropomorphic climate change is consequential for Colorado River management and presents an existential threat to communities, economies, and environments in the basin. More carbon in our atmosphere produces warmer temperatures. (NASA, 2011). Since the Gundersons homesteaded, average global temperatures have risen 1.4 degrees Fahrenheit. (NASA, 2011).

The above graph compares global surface temperature changes (red line) and the Sun’s energy that Earth receives (yellow line) in watts per square meter since 1880. The amount of solar energy that Earth receives has followed the Sun’s natural 11-year cycle of small ups and downs with no net increase since the 1950s. Over the same period, global temperature has risen markedly.

Not only are we receiving less precipitation, but more of what we do receive falls in the form of rain instead of snow.

In our integrated environmental systems, the problem is self-perpetuating:

1) WARMING: more carbon dioxide in our atmosphere
traps solar radiation and results in warmer
temperatures

2) INSECTS/DISEASE: warmer temperatures provide a more favorable climate for forest insects and diseases 3) FOREST LOSS: the loss of entire forests in the Rocky Mountains to insects or disease contributes to increasingly destructive wildfire, desertification, and erosion of soils

4) CO2 RELEASE: wildfire and soil erosion and degradation causes the release of carbon that was once sequestered into the atmosphere

5) DOWNWARD SPIRAL: the cycle continues and conditions worsen.

The most current scientific analysis and review of Colorado River data supports this unfortunate dynamic: “Our results underscore that greenhouse gas emissions reduction and moderating or decreasing atmospheric greenhouse gas concentrations may be critical to maintaining sufficient streamflow volumes to satisfy current and future water use while also complying with interstate and international water allocation agreements.” (Wheeler, 2021; Miller, 2021).

Agriculture in the Colorado River Basin

Agriculture in the Western US has declined and so have our soils. Just as soil degradation has contributed to our condition, so too can soil regeneration be our salvation. The latest Agriculture Census, released in 2019, shows the amount of US agricultural land continued to decline as did the overall number of farming and ranching operations. The 2.04 million farms and ranches marked a three percent decline from 2012. Simply put, land use practices and climate change are resulting in erosion of our soils. (Borrelli, 2020).

Another principal threat to irrigated agriculture in the Western US is the practice of permanently transferring water from irrigated land (aka “buy-and-dry”). (Colorado’s Water Plan, 2015). “Buy-and- dry” is generally disfavored under state water policy due to its potential to negatively impact agricultural communities and economies. (Id.). Colorado’s Water Plan calls for measurable shifts from buy-and-dry to alternative transfer methods such as lease-fallowing arrangements.

If necessity is the mother of invention, some good news in all the dismaying water data may be that less water becomes the crucible in which new practices and collaborations take shape to: regenerate soils; increase sustainable food production; sequester carbon; and conserve water. Regenerative cropping and grazing management practices can increase water percolation and retention in soils. (Elevitch, 2018; Teague, 2018). A Demand Management program could encourage wider adoption of these practices while freeing up irrigation water that could help with water levels at Lake Powell. The science seems clear that even more strategic farming and ranching practices will be necessary to grow more with less water in a Colorado River Basin impacted by climate change while avoiding buy-and-dry. (Wheeler, 2021; Miller, 2021). A Demand Management program appears critical to provide agricultural producers with additional options moving forward.

The Law of the River

The agreements, laws, policies, and practices that govern the use of Colorado River water constitute the “Law of the River.” Complete and thorough descriptions of this canon exist elsewhere. For our purposes, it is sufficient to note the foundation of the Law of the River: i.e., the Colorado River Compact of 1922. The Compact divided the river basin at Lee Ferry, Arizona, and apportioned 7.5 million acre- feet of consumptive use to the Upper Basin and 7.5 million acre-feet to the Lower Basin. Importantly, the Compact also prohibited the Upper Basin States from “caus[ing] the flow of the river at Lee Ferry to be depleted below an aggregate of 75,000,000 acre-feet for any period of 10 consecutive years…” (Compact, 1922). The intent of this provision was to guard against the Upper Basin exceeding its apportionment from a river that experienced annual flows of 18 million acre-feet on average. When, however, climate change has reduced average flows to 12.5 million acre-feet, the non-depletion provision effectively places the entire burden of climate change on the Upper Basin. The negotiators and signatories to the Compact did not anticipate climate change and, therefore, did not intend one basin to bear the brunt of reduced river flows. For this reason, the non-depletion provision has become the chief obstacle to the equitable apportionment it was originally crafted to enforce.

This fact also suggests that minor surgery on the Law of the River provides too little medicine, too late. A recent study of reservoir elevations and inflows warns, “…the current management approach that allows only incremental changes to the Law of the River may be insufficient to adapt to the future conditions of the basin.” (Wheeler, 2021). Instead, the perfect storm of climate change, aridification, and a structural deficit calls for major, evasive (and probably invasive) action.

Demand Management: Friend or Foe?

For nearly two years, the Upper Basin has engaged in lively debate about Colorado River Demand Management. Unfortunately, the hydrology has not slowed its descent to accommodate these discussions. The positive view of Demand Management holds that a program paying users to temporarily and voluntarily leave water in the river is a key tool to address a falling system in a manner that recognizes the American West’s system of purchasable and transferable water rights. The negative position fears such a program would accelerate the decline of irrigated agriculture or the environment in the Upper Basin. Ironically, in a desperate attempt to cling to water that is no longer available, this position would limit agricultural water users’ access to the very capital that could keep them in production. Importantly, the negative view offers no alternative solution to address a climate-change-impacted river system. Far from being a foe, read on to learn why Demand Management should be embraced like an old friend.

Pre-Continency Plan Disincentive
re: Lake Powell & Lake Mead

Incentives matter, especially in a system of free enterprise with purchasable and transferable water rights. Prior to the signing of the Colorado River Drought Contingency Plan in 2019, sovereigns and water users in the Upper Basin of the Colorado River actually faced a structural disincentive to conserve water. Firmly in the grips of aridification where demand outstrips supply, how could this be? In addition to Mark Felt’s (aka Deep Throat) advice to “follow the money” in the US West, it also pays to “follow the water.” Following the water here brings us to the two largest reservoirs in the United States: the Upper Basin’s insurance policy, Lake Powell, and the Lower Basin’s bank account, Lake Mead.

Lake Mead and Lake Powell are the two largest human-made reservoirs in the United States. Lake Mead’s capacity is 28,229,730 acre-feet and Lake Powell can hold 26,215,000 acre-feet of water, with a combined capacity of 54,444,730 acre-feet. At the current average inflow to the river (12,500,000 acre- feet), these two reservoirs could hold four years, four months’ worth of the river’s flow. As such, we have an abundance of water storage infrastructure, which means our Colorado River challenge is a water management challenge.

Any water in the Upper Basin conserved prior to 2019 was deemed “system water” the moment ithit Lake Powell. Colorado River system water is the water used to determine releases from Lake Powell, through the Grand Canyon, to Lake Mead. Because water conserved in the Upper Basin had no special designation, any water that made it to Lake Powell was used to calculate the releases and, therefore, could actually trigger a larger release of water from Lake Powell.

Negotiations

Faced with the threat of increasing aridification, the seven basin states and the federal government commenced emergency river management talks in 2017. Projections for Lake Powell and Lake Mead were alarming and showed that mere reliance on the operations policies then in place could bankrupt both reservoirs well in advance of the 2026 deadline for replacement criteria. (Interim Guidelines, 2007).

Lower Basin Situation

The Upper Basin had long criticized the Lower Basin’s water use that withdrew more water than flows into the system on an annual basis. The Upper Basin referred to this imbalance as “the structural deficit.” Furthermore, for reasons too involved to review in detail here, the Lower Basin states were facing their own disincentives to bank water in Lake Mead. California, the largest user in the Lower Basin, wanted assurances that Arizona would refrain from ordering the release of water the Golden Bear had banked in Lake Mead. Arizona, on the other hand, felt compelled to order the release of its entire legal apportionment from Lake Mead because of its junior priority on the river (the junior priority was the sacrifice Arizona was required to make to gain congressional approval of the Central Arizona Project). The stage was set for negotiations that would determine whether terms could be reached. The Lower Basin’s saga deserves its own article and I will not test your patience with it here.

Upper Basin Situation

The Upper Basin sovereigns sought more control over their shared destiny, especially given the entrenched nature and size of the structural deficit in the Lower Basin. Indeed, one of the reasons the system had not dropped even more quickly was because actual consumptive use in the Upper Basin failed, annually, to keep up with projections of greater water use. (Wheeler, 2021). Therefore, more water was showing up at Lake Powell, for subsequent release to Lake Mead, than the models predicted. This “extra” water in the system masked the real impact and rate of climate change. The true disruptive potential, however, of climate change would not remain hidden. The Lower Basin’s structural deficit was so great that, even with the Upper Basin already on a physically imposed water diet, the reservoirs continued to fall. Something had to be done.

Due to political, practical, and temporal realities, any immediate solution would need to work within the existing Law of the River. For one thing, the need to act quickly was incompatible with the lengthy environmental review processes typically required when making fundamental changes to existing management policy. In an attempt to avoid legal and practical crises on the river, Upper Basin interests began discussing two concepts: 1) operation of the initial units of the Colorado River Storage Project (Flaming Gorge, Aspinall, and Navajo reservoirs) to allow releases of water to address critical Lake Powell levels; and 2) creation of a safe harbor that would allow water users to voluntarily manage their demands and send conserved water to Lake Powell, free from the threat that the volume of conserved water would trigger larger releases of water to Lake Mead.

Colorado River Drought Contingency Plan

Over the course of 2018, the Upper Basin and Lower Basin concepts were discussed, debated, and eventually agreed to by the seven states and federal agency representatives. After much intrastate and interstate wrangling, the most recent addition to the Law of the River was settled on in a suite of agreements collectively known as the Colorado River Drought Contingency Plan (Contingency Plan or DCP). See Article, TWR #182 & Bovee, TWR #201. The states further agreed to pursue federal legislation directing the Secretary of the Interior to sign and implement the Contingency Plan agreements upon execution by the parties. On March 19, 2019, the Basin States wrote a letter to the US Congress requesting this legislation. In transmitting suggested legislative language, the Basin States noted that, much like the Contingency Plan itself, the language was “the product of collaboration and compromise” and that the Contingency Plan “will enhance existing water management tools in order to address a looming water crisis in the Colorado River Basin.” (Contingency Plan, Attachment C). The states also stressed the urgency of the situation, “[i]t is the position of the Basin States, and water contractors within those states, that immediately enacting the proposed federal legislation and implementing the [Contingency Plan] reduces the probability that Lakes Powell and Mead will decline to critically low elevations — which could occur as early as 2021 — and promotes both domestic and binational participation in drought contingency planning.” (Contingency Plan, Attachment C).

When asked what the Law of the River means, many Colorado River negotiators quip, “whatever the seven states say it means.” The retort proved true when, in an exceptionally polarized Congress, passage of the requested legislation occurred on April 8, 2019, a mere twenty days after the states submitted their request.

The Contingency Plan consists of an umbrella “Companion Agreement” (officially titled “Agreement Concerning Colorado River Drought Contingency Management and Operations”) and the following appended agreements:

• “Agreement for Drought Response Operations at the Initial Units of the Colorado River Storage Project Act”
• “Agreement regarding Storage at Colorado River Storage Project Act Reservoirs under an Upper Basin Demand Management Program”
• “Lower Basin Drought Contingency Plan Agreement”
Exhibit 1: “Lower Basin Drought Contingency Operations”
Appendix 1: “Table of Extraordinary Conservation (EC) ICS available as of the
Effective Date, in accordance with Section IV.A.1 of the LBOps”
• “Proposed Legislation” (Contingency Plan, 2019).

Responsive Operations of Reservoirs above Lake Powell

The first agreement directs and authorizes the Secretary of the Interior to operate the Colorado River Storage Project Act reservoirs (Flaming Gorge, Aspinall, Navajo) to protect the Lake Powell “Target Elevation” of 3,525 feet above mean sea level. This includes the authority to take emergency action at these reservoirs. Unless the parties agree otherwise, this agreement terminates on December 31, 2025. (Contingency Plan, Attachment A1).

Demand Management

The second agreement authorizes the Secretary of the Interior to create an account “available for use by the Upper Division States” not subject to release or used to “cause a different release from Lake Powell than would have otherwise occurred under” the 2007 [Guidelines] or post 2026 operational rules.”

(Contingency Plan, Attachment A2). The agreement describes the four steps for approval of the Upper Basin Demand Management Program:

• First, the Upper Colorado River Commission makes findings that Demand Management is necessary.
• Second, the Upper Basin States and the Secretary of the Interior agree on the methodology, process and documentation for verification and accounting for Demand Management water.
• Third, the Upper Colorado River Commission approves of the Program.
• Finally, each Upper Basin State representative on the Upper Colorado River Commission approves the Program. (Contingency Plan, Attachment A2).

Whether or not the Law of the River is fundamentally altered under some alternative management paradigm, Demand Management is critical to the future of the Colorado River. The Contingency Plan recognizes this importance by allowing the concept of Demand Management to survive termination of the Contingency Plan through 2057. (Contingency Plan, Attachment A2).

Account Holders in Lake Powell: Sovereigns and Sovereigns Only

In describing the Demand Management account, the obvious is clear: sovereigns and only sovereigns are capable of holding water accounts in Lake Powell. At no point in the Basin States’ contingency plan negotiations did Colorado or any other state voice support for any entity other than a sovereign holding water in the Demand Management account in Lake Powell. The signatories to the Colorado River Contingency Plan Demand Management Agreement were all signing on behalf of sovereigns and sovereigns only. (Contingency Plan, Attachment A2). Moreover, not only would private accounts held by non-sovereigns be inconsistent with the Demand Management agreement and approvals described above, but such accounts could also undermine the benefit of the bargain Colorado and the other Upper Basin States negotiated in 1922. This is because the mere existence of those accounts would move substantially closer to Upper Basin to Lower Basin transfers of water. Such transfers would fly in the face of the benefit of the bargain the Upper Basin States negotiated to use water at their own pace (as opposed to engaging in a race to develop prior appropriation rights that the Lower Basin had already won). Sovereigns and only sovereigns are or should be capable of holding water in Lake Powell. The role of a sovereign here is to design a program that encourages the participation of its non-sovereign water users (e.g. private individuals and businesses, special water districts, municipal water providers).

Post-Contingency Plan programs reserved to the states

Belying the pending crisis, the Upper Basin has yet to take even the first of the four steps required for Demand Management program approval. While the signatory states created the Demand Management account upon approval by Congress and execution by the Upper Basin States, the negotiators intentionally reserved the design and detail of programs that would populate the account to the individual sovereign states.

While the Demand Management account now exists, it sits empty heading into yet another year of aridification. As of this writing, no state has approved a program to populate the account with water. Colorado, the state with both the largest contribution of water to the Colorado River, the largest Upper Basin apportionment, and the state where the discussion has been most involved to date, has yet to determine whether any program is feasible, achievable, worthwhile, or advisable. (CWCB, 2020).

The analogy of skydiving is apt. Thanks to the Contingency Plan, we now have a two-parachute rig strapped to our collective back. One parachute represents our ability to release water from reservoirs above Lake Powell to slow our descent. (Contingency Plan, Attachment A1). The second is Demand Management. (Contingency Plan, Attachment A2). The ground is quickly approaching. We can argue about the color of the second chute until it is too late, or we can pull the ripcord and start focusing on landing as safely as possible.

Our pace on achieving the four approvals must accelerate considerably in order for the second parachute to deploy in time. In the words of NASA Flight Director Gene Kranz, failure is not an option. Demand Management, alone, may prove insufficient to keep Lake Powell above the Target Elevation but we simply must deploy it to help arrest our descent. Making the decision to “go” requires leadership. Director Kranz speaks to this as well: “Leadership is fragile. It is more a matter of mind and heart than resources.” (Kranz, 2000). Without courageous leadership, a perfectly good parachute will remain, useless, in our pack and our hard-won Demand Management account will continue to sit empty.

Demand Management Benefits

Colorado River Demand Management has the potential to benefit all water users, the environment, and regional economies. With the creation of the Demand Management account, the Upper Basin States have, for the first time, an incentive to encourage water users to conserve water for banking in Lake Powell. Moreover, because the account exists until at least 2057, this incentive does not depend on any facet of the Law of the River changing or remaining static.

The Demand Management Storage Agreement provides a path to compensated, voluntary, temporary payments for conserved water. Should Upper Basin uses have to be reduced for any reason, Demand Management is a way to effectuate that reduction in a manner that best avoids “buy-and-dry.” (Colorado’s Water Plan, 2015). Demand Management can help facilitate alternatives to buy-and-dry that keep water rights permanently tied to production agriculture, thereby helping increase food security.

Demand Management can also assist with streamflow restoration. Conserved water flowing to Lake Powell might be timed to maximize the benefit to endangered fish species and critical habitat in the Upper Basin. Fortunately, the decline of the Colorado River is coinciding with evolving environmental science that helps quantify the benefits when water is left in a river. (Szeptycki, 2018). These benefits can be quantified and monetized to benefit water users trying to decide whether to consume their water or to leave it in the river in a given year.

Downstream of Lake Powell, scientific analysis shows environmental benefits and detriments to both native and non-native fish species below Lake Powell depending on its contents. (Rosenberg, 2021). Cooler water temperatures result when reservoir contents are higher while warmer water is the product
of lower water levels in reservoirs. While native fish may prefer warmer water temperatures from a drawn down Lake Powell, “they may also face invasion by warm water non-natives from Lake Mead.” (Rosenberg, 2021). The “best strategy is an intermediate strategy, where you have water that’s not too hot and not too cold…where you can still provide thermal conditions that are conducive to growth of native fish.” (Dibble, 2021). Demand Management water in the Colorado River System can make it easier to hit this “Goldilocks Zone” where reservoir releases are neither too hot nor too cold.

An Urgent Call to Action

While you have been reading this article, our continued, collective skydive has brought us that much closer to an unacceptable, and unpleasant, reunion with the ground. Simple physics demands we act. Two recent studies underscore the fact that managing Upper Basin demands is critical to addressing the decline of the Colorado River. (Wheeler, 2021; Miller, 2021). One argues that “[e]quitable demand reductions will be an important part of water management in the Colorado River basin in the era of climate change.” (Wheeler, 2021). A Demand Management program appears to be the most equitable and beneficial method for reducing demands without accelerating the buy-and-dry of irrigated agriculture.

Livelihoods, cultures, economies, food production, and environments are inextricably linked to the Colorado River. As such, sovereigns should involve both public and private sectors in making the next round of macro and micro water management decisions. The science seems clear that Colorado River management moving forward also requires more than a mere tweak here or there to the 2007 Guidelines for river operations. The fundamental tenants of interstate water management are overdue for a serious reevaluation. One part of the basin bearing the vast majority of climate change risk and reality is neither equitable nor sustainable. Moreover, to use a basketball analogy, the clock is not our friend. We are playing from behind and do not have the luxury of waiting until 2026 to adopt new water management policy.

Each stakeholder on the Colorado River has an important role to play and Demand Management can facilitate their involvement. By now, you probably have a sense of the roles that federal, tribal, interstate, state, and local governments play on the Colorado River. Less often discussed is the role of the private sector. Importantly, private, for-profit interests include farmers and ranchers, rafting guides and flyfishing outfitters, main street businesses, and professional services industries. Given the scope and urgency of the challenge, excluding or vilifying stakeholders wastes precious time — time better spent cultivating and encouraging new water management ideas, innovation, and expertise from stakeholders from all sectors for the benefit of the Colorado River basin. (Ryder Howe, 2021). Providing agricultural producers access to capital in ways that avoid buy-and-dry and de-risk production is also important.

Conclusion

The sovereigns in the Colorado River basin should move quickly to make effective, efficient, equitable, and holistic management decisions in response to climate change. Demand Management has the potential to encourage conservation, innovation, and collaboration. Allowing agricultural producers greater flexibility and options encourages regenerative agricultural practices that could help address climate change. Compensating Upper Basin water users for leaving water in the river is a critical tool currently available to us by virtue of the Contingency Plan and can help us control the system’s descent. Upper Basin ranches like Mary and Ole Gunderson’s and those on Ute Tribal lands, stand a chance of not only still being in active production but thriving and contributing to the solutions that save the Colorado River. In summary, effective and efficient Demand Management could jumpstart a different cycle: 1) money is paid to agricultural water users for temporarily leaving their water in the river; 2) the increased flexibility this capital provides producers increases their ability to adopt regenerative agricultural practices that save water, sequester carbon, and regenerates healthy soil; 3) regenerative practices help slow climate change and aridification; 4) slowing climate change and aridification results in better agricultural conditions and greater resiliency; and 5) a stronger agricultural sector increases yields and nutrient content that results in more money for producers.
for additional information:

James Eklund, Eklund Hanlon LLC, 720/ 280-1835, james@eklundhanlon.com

#LakeMead likely to drop below elevation 1,040 by late 2023 — John Fleck #ColoradoRiver #COriver #aridification

Graphic credit: USBR

Last week John Fleck took a look at the April 15, 2021 Colorado Basin River Forecast Center’s 24-Month Study. Click here to read the post. Here’s an excerpt:

I’m choosing my words carefully here. The “likely” in this blog’s post’s title means “based on my analysis of the Bureau of Reclamation’s current ‘most probable forecast’ Colorado River water supply model runs.”

The Bureau’s current “most probable” modeling suggests that in both 2022 and 2023, the annual release from Lake Powell will only be 7.48 million acre feet. This is based on a provision in the river’s operating rules that, under certain low storage level conditions, the Upper Basin gets to hang onto water in Powell.

The last time and only time we had a 7.48 release, in 2014, Mead dropped 25 feet in a single year. We’ve never had two consecutive 7.48 releases.

The headline in yesterday’s release of the Bureau of Reclamation’s “24-month study” (pdf here) is that Lake Mead will drop below elevation 1,075 at the start of 2022 (triggering a “Tier 1” shortage) and could drop below 1,050 by the start of 2023 (that’s the trigger for “Tier 2”).

Tier 1 next year, which primarily hits Arizona with some deep forced reductions, was no surprise. That’s been obvious for a while, and Arizona’s water leadership has been softening folks up for months. The increasing risk of Tier 2 in 2023, which would mean deeper cuts in Arizona, is sorta new, but it’s been foreseeable.

The real “holy shit” for me in yesterday’s release was the trail of breadcrumbs in the Bureau’s data, pointed out by my co-author Eric Kuhn, leading to a “most probable” Lake Mead drop to elevation 1,035 by the end of September 2023.

To be clear, the Bureau isn’t saying this yet. The latest 24-month study stops at the end of March 2023. But internally, the Bureau runs the model out farther in order to determine, among other things, how much water is likely to be released from Powell in 2023. And the published numbers clearly show – the Bureau’s “most likely” scenario would call for another 7.48 release.

From there, it’s just arithmetic. Based on my analysis of the publicly available numbers, the “most likely” scenario puts Mead at elevation ~1035 at the end of September 2023. This is my math, but my understanding is that it’s consistent with what the Bureau’s internal calculations show.

Lake Powell is seen in a November 2019 aerial photo from the nonprofit EcoFlight. Keeping enough water in the reservoir to support downstream users in Arizona, Nevada and California is complicated by climate change, as well as projections that the upper basin states of Colorado, Utah, Wyoming and New Mexico will use as much as 40% more water than current demand. A recent white paper from a lineup of river experts calls those use projections into question.
CREDIT: ECOFLIGHT via Aspen Journalism

Eric Kuhn followed up John’s post with one of his own. Here’s an excerpt:

The release of last week’s Bureau of Reclamation 24-month study felt like very bad news for the Colorado River (See Tony Davis for details.). But a careful reading of the numbers, and an understanding of the process through which they are developed, suggests things are likely even worse than the top-line numbers in the study.

The problem: the assumptions underlying the study do not fully capture the climate-change driven aridification of the Colorado River Basin. Taking climate change into account, it is easy to find evidence lurking in the report to suggest that, in addition to problems for Lake Mead, Lake Powell could drop below elevation 3,525 in 2023, a level that is troublingly close to the elevation at which Glen Canyon Dam could no longer generate hydropower.

The 24-month studies are used to project out two years of monthly inflows, releases, storage levels, and power generation from the system’s large reservoirs in both basins as well as diversions by the large water users on the river below Lake Mead, especially the Central Arizona Project and the Metropolitan Water District of Southern California. Reclamation releases a “most probable” study on a monthly basis as well as “minimum probable” and “maximum probable” studies approximately quarterly. These studies are important because they are used to make critical decisions under the 2007 Interim Guidelines and both the Upper and Lower Basin Drought Contingency Plans (DCPs).

For the first year, Reclamation uses “unregulated” runoff forecasts generated by the Colorado Basin River Forecast Center (CBRFC) model. Unregulated inflow is not the same as natural inflow. The CBRFC does its best to adjust the forecasts for upstream diversions and for the many reservoirs that are not included in the 24-month study model. Inflow forecasts for the second year of the 24-month studies are not based on the CBRFC model. Instead, Reclamation, in consultation with CBRFC, uses statistics from the past and its judgment. Running the 24-month study model then simulates the operation of the upstream reservoirs such as Navajo, Blue Mesa, and Flaming Gorge, turning unregulated inflow to Powell into “regulated” inflow. For example, from the April ‘21 most probable study, the WY 2021 unregulated inflow to Powell is 4.897 MAF, regulated inflow is 4.908 MAF. These numbers are close, but in WY 2020 regulated inflow exceeded unregulated inflow by about 700,000 acre-feet.

The media buzz over the April 24-month study primarily focused on the projected Tier 1 shortage for the Lower Basin in 2022 – an event that is newsworthy, but one that also was totally expected. Perhaps more interesting and alarming is what the 24-month studies suggested for 2023. As pointed out by John in his recent blog, the most probable study shows two years of 7.48 MAF releases from Lake Powell, Lake Mead elevations on the cusp of a Tier 2 shortage in 2023, and by inference, Lake Mead dropping to a level of about 1035’ by the end September 2023, which by implication would trigger a third straight shortage year and California’s possible participation sharing shortages under the Lower Basin DCP.

For Lake Powell, the most alarming results come from the minimum probable study, not the most probable study. Under the minimum probable inflow forecast to Powell, which, in theory, represents an unregulated flow that would be exceeded in 90% of years, by March of 2023 Lake Powell drops well below the 3525’ target that would trigger supplemental releases from the upstream CRSP reservoirs under the Upper Basin DCP. There is also a real possibility that Lake Powell could end up in the Lower Elevation Balancing Tier. If this happens, the April minimum probable study shows that Lake Mead gets more water in the first six months of WY 2023 than under the most probable study.

The term “minimum probable” implies an outcome that is very unlikely to occur, therefore, why should we be that concerned? My answer is that given the abundance of recent science concluding that the Colorado River Basin is not in a classic drought, but rather, it is undergoing aridification where the flows seen in the last two to three decades may be the new abnormal and may continue to decline (see for example Overpeck and Udall, and the latest Utah State Future of the Colorado River white paper White Paper). The April studies show a most probable Powell unregulated inflow for WY 2022 of 9.998 MAF and a minimum probable inflow of 7.208 MAF. For comparison, the mean unregulated annual inflow to Lake Powell over the last ten years, including WY 2021, was only 8.04 MAF and five of the individual years; 2012, 2013, 2018, 2020, and 2021, were well below the 7.208 MAF. The average of those five dry years was 5.08 MAF, over two MAF less than the assumed minimum probable inflow for 2022. If you take the record back to 2000, the results are similar. In 11 of 22 years, unregulated inflow to Lake Powell was less than 7.2 MAF/year.

Based on the last 20-plus years and the recent science, I conclude that both the minimum probable and most probable 24-month study year two unregulated inflows to Lake Powell are overly optimistic. The likelihood that in the next few years Lake Powell storage will fall below the 3525’ target or even the minimum power elevation (3490’) and that Lake Mead storage will approach 1025’, the level that triggers the maximum annual cutbacks under the Interim Guidelines and DCP, about 1.4 MAF, is much greater than what is conveyed by these studies.

In a photo from 2020, a distinct line around the rocky shore shows how much the water level has decreased in Nevada’s Lake Mead. Mead is expected to drop 15 feet in 2021 Photo credit: Roberto (Bear) Guerra/High Country News

Finally, Click here to read Tony Davis’ article at Tucson.com. Here’s an excerpt:

The Central Arizona Project seems almost certain to suffer its first significant shortage in water deliveries next year.

Reservoirs are expected to fall so low by the end of 2021 to warrant cutting nearly two-thirds of the CAP water that Pinal County farmers now get. At that point, CAP deliveries used by the state to store water in the ground for future use by cities and tribes would also be cut. So would CAP water supplies sold to the Central Arizona Groundwater Replenishment District, an agency that recharges water into aquifers across the state’s urban centers to compensate for groundwater pumped elsewhere for new development.

The loss for farms has been expected for years. But possible cuts for other water customers now loom sooner than anticipated, as the Colorado River’s situation worsens.

For the first time, a federal agency’s river forecast predicts that at the end of 2022, the Lake Mead reservoir will be at or very near a point where CAP must cut deliveries to other categories of water users.

Those cuts would fall upon Phoenix-area cities and on Arizona tribes, including possibly the Tohono O’Odham whose reservation is south and west of Tucson.

If they happen, the cuts would also start slicing deliveries of relatively small amounts of CAP water to Rosemont Copper and Freeport McMoran Copper in the Tucson area and to Resolution Copper in the Superior area.

Tucson depends on CAP for drinking water, but its supplies wouldn’t yet be affected.

The cuts to farmers will be required if Lake Mead falls below 1,075 feet at the end of this year. The Bureau of Reclamation’s new forecast — announced Thursday for the river — puts the expected level at 1,067 feet by then. The bureau will likely decide in August whether to declare a shortage for 2022.

The additional cuts to tribes and to Phoenix-area cities would be required in 2023, if Lake Mead falls below 1,050 feet. The new forecast is for the lake to be at 1,050.31 feet by December 2022.

Tucson’s CAP supply wouldn’t be cut unless the lake fell below 1,025 feet.

The Pagosa Area #Water and Sanitation District implements voluntary #drought restrictions — The #PagosaSprings Sun #SanJuanRiver #ColoradoRiver #COriver #aridification

Colorado Drought Monitor April 13, 2021.

From The Pagosa Springs Sun (Clayton Chaney and Randi Pierce):

The Pagosa Area Water and Sanitation District (PAWSD) is asking water users to practice responsible water use, with the district currently in a voluntary drought stage in compliance with its 2020 Drought Management Plan.

According to a press release from PAWSD District Manager Justin Ramsey, “The primary driver of this drought stage is the U.S. Drought Monitor (USDM),” which indicates that “our area is in a Severe to Extreme Drought.”

Ramsey’s press release notes that Hatcher Lake is lower than the median volume for this time of year, “however the lake is currently filling.”

“The flow of water in the San Juan is currently above the median flow for this time of year,” the press release further notes.

Ramsey also noted in his press release that so far this spring Pagosa Country has seen higher-than-normal temperatures.

He explained that the higher-than-normal temperatures combined with “a reduction in late spring precipitation will lead to a quicker-than-normal melting of the snowpack,” which will reduce the volume of available water and “could lead to water use restrictions.”

According to the press release, there are no mandatory water use restrictions, “however PAWSD does encourage responsible water use.”

[…]

River report

According to the U.S. Geological Survey (USGS), the San Juan River was flowing at a rate of 606 cubic feet per second (cfs) in Pagosa Springs as of 10 p.m. on Tuesday, April 13.

Based on 85 years of water records at this site, the average flow rate for this date is 514 cfs.

The highest recorded rate for this date was in 1985 at 1,930 cfs. The lowest recorded rate was 120 cfs, recorded in 1977.

As of 10 p.m. on Tuesday, April 13, the Piedra River near Arboles was flowing at a rate of 492 cfs. Based on 58 years of water re- cords at this site, the average flow rate for this date is 784 cfs.

The highest recorded rate for this date was 2,600 cfs in 1985. The lowest recorded rate was 128 cfs in 1977.

Westwide SNOTEL basin-filled map April 18, 2021 via the NRCS.

Snow report

According to the U.S. Department of Agriculture National Water and Climate Center’s snowpack report, the Wolf Creek summit, at 11,000 feet of elevation, had 33.8 inches of snow water equivalent as of 10 p.m. on April 13.

That amount is 79 percent of the April 13 median for this site.

The San Miguel, Dolores, Animas and San Juan River basins were at 61 percent of the April 13 median in terms of snowpack.

@GreeleyWater: Dive into a look at the city’s water rights — The #Greeley Tribune

Seaman Reservoir upstream of confluence of the North Fork of the Cache la Poudre River. Photo credit Greg Hobbs.

From The Greeley Tribune (Trevor Reid):

In the past year, Greeley officials purchased about 1,000 acre-feet of water, equivalent to about 1,000 football fields covered in a foot of water. Adam Jokerst, deputy director of water resources for the city, said it’s more water than city had acquired in the past 10 years. Jokerst, who manages the water acquisition program, said the program has about a $9 million budget this year…

What is a water right?

Colorado’s waters are owned by the state and all its citizens, but water rights dictate the right to use the water. Water decrees, issued by water courts, confirm water users’ rights to that water.

Older water decrees were simple, Jokerst said, giving the example of a decree for the city’s senior direct rights, meaning the city has priority to divert water for direct application to beneficial use. Throughout the year, the city can use 12.5 cubic feet per second. That’s about it, he said.

Newer decrees can range from dozens to hundreds of pages, detailing how the water is to be diverted, measured and accounted for.

“Greeley owns a portfolio made up of many different water rights,” Jokerst said. “Some of those water rights are direct diversions from the Poudre River. Some are ownership in irrigation companies.”

Irrigation companies that historically provided irrigation water to farmers can issue shares of stock, basically selling a piece of the water rights held by those companies. The city converts that water from agricultural to municipal use to change the water right, though the city does rent some water rights to agricultural users, maintaining the historic use.

The city also owns water through the Colorado-Big Thompson and Windy Gap projects, as well as water diverted from the Laramie River. With a lot of variability across these different sources, the city’s water experts always plan for the worst case scenario: How much water could we provide to our customers in a drought situation?

Through the current plan, the city can provide about 40,000 acre-feet per year to its customers, well above the roughly 25,000 acre-feet of demand the city sees in a typical year. In a wet year, the city could potentially deliver up to 70,000 acre-feet, to give an idea of the impact of the planned drought.

When the city can, it rents a lot of that water to agricultural partners, renting about 20,000 acre-feet in the past year. In addition to maintaining historic use, this provides a source of revenue and supports Greeley’s agricultural economy, Jokerst said.

Jokerst said he’d consider the city’s “Big Three” sources to be:

  • Senior direct rights from the Poudre River
  • Ownership in the Greeley-Loveland Irrigation Company, which feeds the city’s Boyd Lake System
  • Colorado-Big Thompson (C-BT) and Windy Gap projects
  • Jen Petrzelka, water resources operations manager, added the direct and C-BT water is available year round, whereas a lot of the ditch directs only come in during irrigation season, which typically starts about now to early May and runs through the end of September or into October.

    Accounting for the city’s diverse portfolio

    The city must account for its water on a daily basis, submitting a monthly report to the state. Petrzelka said they manage about 10 different spreadsheets for all the city’s water right decrees…

    Petrzelka keeps an eye on the city’s water supply to help prevent the need for watering restrictions. In all, the city has four engineers and scientists who manage the various decrees and operations, plus three workers out in the field, according to Jokerst.

    The state ensures water users aren’t causing injury to other users’ water rights, with local river commissioners dedicated throughout the state. Jokerst compared the commissioners to a referee in a sports game.

    “Any time we change the way we’re operating, whether that be our releases or operating an exchange, we have to get their approval,” Petrzelka said.

    When agricultural water rights are changed, Jokerst said, some water is owed back to the river, just as the water historically returned to the river and groundwater after agricultural use.

    “A lot of what we do is add water back to the river to compensate for those irrigation rights that we changed,” he said.

    In addition to enforcement by river commissioners, everybody watches their neighbors, keeping track of what other users are doing on a day-to-day basis. Part of that monitoring happens in water court, where decisions about decrees are settled…

    Greeley has a steady stream of water court cases the city must defend in court, according to Jokerst, as well as cases involving other entities in which the city enters opposition to protect its water rights. As of this past week, the city was involved in 32 water court cases.

    “Water court cases are really just a structured negotiation where the applicant and the opposers reach agreement on whatever it is the applicant is trying to do,” Jokerst said. “All the parties involved negotiate an outcome that protects all their water and gets the applicant what they need.”

    Petrzelka and Jokerst estimated the city’s water court costs at about $500,000 this year, mostly covering the costs of outside attorneys and engineers. Internal legal counsel also helps guide the department, Jokerst said.

    ‘We’re making progress’ — Navajo-Gallup Water Supply Project moves ahead on Navajo Nation — The #Farmington Daily Times #SanJuanRiver #ColoradoRiver #COriver #aridification

    Installing pipe along the Navajo-Gallup Water Supply Project. Photo credit: USBR

    From The Farmington Daily Times (Noel Lyn Smith):

    U.S. Bureau of Reclamation construction inspector Kenny Redhouse carefully watched crewmembers install a section of pipe in an area south of Newcomb on April 15 as construction continued on a pipeline that will eventually deliver San Juan River water to Gallup and communities on the Navajo Nation.

    The water will replace dwindling groundwater supplies and meet future demand…

    Project broke ground in 2012

    It was in June 2012 when then Secretary of the Interior Ken Salazar, former Navajo Nation President Joe Shirley Jr. and others broke ground for construction of the first phase of the Navajo-Gallup Water Supply Project.

    Almost a decade later, construction proceeds on the San Juan Lateral, the largest of two segments that comprise the project. This lateral will eventually pump water from the San Juan River near Waterflow then deliver it south to Gallup and to Navajo Nation chapters along the pipeline and that surrounds the city.

    As the lateral approaches Gallup, it branches east toward Crownpoint while another branch will serve Window Rock, Arizona, and areas along New Mexico Highway 264.

    The bureau marked in October the completion of the Cutter Lateral, which will deliver water to several chapters on the eastern side of the Navajo Nation and to the southwestern portion of the Jicarilla Apache Nation.

    Bart Deming, the project’s deputy construction engineer, said construction of the San Juan Lateral is about 50% complete…

    Seven more years of work

    The total cost of the project is about $1.5 billion, and the entire project will be operational in 2028, he said.

    It is not difficult to notice construction activities alongside U.S. Highway 491 in Newcomb and Sheep Springs.

    Rick Reese, field engineering division manager for the bureau’s Four Corners office, said sections of pipe near Burnham Junction, in Naschitti and portions of Newcomb have been installed within the last year and a half…

    The area of focus now is south of Newcomb into Sheep Springs.

    Completion on this portion of the lateral is on track to end in early 2022, Reese said…

    The bureau awarded in September 2020 a nearly $46 million contract to Archer Western Construction LCC of Phoenix to build the pumping plant and a second one in Twin Lakes.

    San Juan River Basin. Graphic credit Wikipedia.

    US West prepares for possible 1st #water shortage declaration — The Associated Press #ColoradoRiver #COriver #aridification

    At full pool, Lake Mead is the largest reservoir in the United States by volume, but two decades of drought have dramatically dropped the water level behind Hoover Dam as can be seen in this photo. (Source: U.S. Bureau of Reclamation)

    From The Associated Press (Sam Metz):

    The U.S. Bureau of Reclamation released 24-month projections this week forecasting that less Colorado River water will cascade down from the Rocky Mountains through Lake Powell and Lake Mead and into the arid deserts of the U.S. Southwest and the Gulf of California. Water levels in the two lakes are expected to plummet low enough for the agency to declare an official shortage for the first time, threatening the supply of Colorado River water that growing cities and farms rely on.

    It comes as climate change means less snowpack flows into the river and its tributaries, and hotter temperatures parch soil and cause more river water to evaporate as it streams through the drought-plagued American West.

    The agency’s models project Lake Mead will fall below 1,075 feet (328 meters) for the first time in June 2021. That’s the level that prompts a shortage declaration under agreements negotiated by seven states that rely on Colorado River water: Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming.

    The April projections, however, will not have binding impact. Federal officials regularly issue long-term projections but use those released each August to make decisions about how to allocate river water. If projections don’t improve by then, the Bureau of Reclamation will declare a Level 1 shortage condition. The cuts would be implemented in January.

    Arizona, Nevada and Mexico have voluntarily given up water under a drought contingency plan for the river signed in 2019. A shortage declaration would subject the two U.S. states to their first mandatory reductions. Both rely on the Colorado River more than any other water source, and Arizona stands to lose roughly one-third of its supply.

    Water agency officials say they’re confident their preparation measures, including conservation and seeking out alternative sources, would allow them to withstand cuts if the drought lingers as expected.

    “The study, while significant, is not a surprise. It reflects the impacts of the dry and warm conditions across the Colorado River Basin this year, as well as the effects of a prolonged drought that has impacted the Colorado River water supply,” officials from the Arizona Department of Water Resources and Central Arizona Project said in a joint statement…

    Colby Pellegrino, director of water resources for the Southern Nevada Water Authority, reassured customers that those preparation measures would insulate them from the effects of cuts. But she warned that more action was needed.

    Home Lake being drained, improvements planned — The #MonteVista Journal

    HomeLlake via city-data.com

    From Colorado Parks & Wildlife via The Monte Vista Journal:

    Colorado Parks and Wildlife is draining Home Lake and making plans to improve the local fishery.

    “We know this will be a disappointment for some local folks, but this will help us better utilize our water right and improve the fishery,” said Tony Aloia, a water technician for CPW in the San Luis Valley.

    The lake is a popular fishing spot, but a lack of water caused a fish die-off in early April. Water was too low in early winter to utilize a floating solar-powered machine that normally can keep sections of the lake free of ice. This winter the lake froze over completely, was covered with snow and all the fish died.

    No water will be diverted into the lake this spring and the ground will be allowed to dry — a process that will take all summer. After it dries, CPW will use heavy equipment to remove the fine silt sediment that has accumulated over the years which will help to make the lake deeper. Work to remove the silt will begin after it is dry, probably in October.

    CPW staff will also test the sediment to determine if it could be used as a soil supplement for compost and possibly be used at farms and in gardens.

    CPW usually stocks the lake with rainbow trout, catfish, bluegill and bass.

    CPW will also use this time to rebuild the pump system that is used to bring water to Home Lake.

    In the meantime, low water and exposed mudflats are proving to be a boom for birds. Eagles and osprey are scavenging the dead fish. Shore birds, which are migrating through the San Luis Valley now, are feeding along the edges of the water.

    “It’s a good time for some bird watching at Home Lake,” Aloia said.

    Photo courtesy of CPW Colorado Parks and Wildlife staff have removed aerators from Home Lake in preparation of draining the small reservoir.

    Homestake Reservoir release proves tricky to track — @AspenJournalism

    Two men fish the Eagle River just above its confluence with the Colorado River in Dotsero. Homestake Partners released 1,667 acre-feet of water down Homestake Creek and into the Eagle River in September to test how a release would work in a compact call.
    CREDIT: BETHANY BLITZ/ASPEN JOURNALISM

    From Aspen Journalism (Heather Sacket):

    Getting water to state line would be key in compact call

    In September, Front Range water providers released some water downstream — which they were storing in Homestake Reservoir — to test how they could get it to the state line in the event of a Colorado River Compact call.

    But accurately tracking and measuring that water — from the high mountain reservoir in the Eagle River watershed all the way through the Colorado River at the end of the Grand Valley — turned out to be tricky, according to a recently released report from the Colorado Division of Water Resources.

    From Sept. 23 through Sept. 29, Colorado Springs Utilities, Aurora Water and Pueblo Board of Water Works released a total of 1,667 acre-feet of water, which would have otherwise been diverted to the Front Range, from the reservoir into Homestake Creek, a tributary of the Eagle River. The release gradually ramped up from about 25 cubic feet per second to 175 cfs and then gradually back down over the seven days.

    But officials were unable to put a number on how much of that water made it to the state line.

    In their attempt to quantify the actual amount of reservoir release delivered to the state line, state engineers ran into challenges that caused uncertainty, they said in an email.

    Although they couldn’t measure how many acre-feet officially made it, State Engineer Kevin Rein said that the exercise was still a success and that all the water, minus transit losses, crossed into Utah.

    “We have heard this is a failure because not everything worked perfectly, but in my mind, this was an opportunity under non-stress conditions to find out what we need to do to ensure that things will work,” Rein said.

    A goal of this project, known as the State Line Delivery Pilot Reservoir Release, was to see if the water could be “shepherded” downstream without senior water-rights holders diverting the extra water. This required Division 5 water commissioners to actively administer some headgates, especially on Homestake Creek and the Eagle River.

    According to the report, the water took about 2½ days to make the journey from the reservoir to the gage on the Colorado River near Cameo — about 16 hours longer than predicted by the Colorado Basin River Forecast Center. Along the way, about 10% of the water either evaporated or was soaked up by thirsty streamside soils and vegetation — processes known collectively as transit loss.

    Making sure water could get to the state line would be essential in the case of a compact call.

    This scenario, the chances of which increase as climate change continues to reduce river flows, could occur if the upper-basin states (Colorado, Wyoming, Utah and New Mexico) can’t deliver the 7.5 million acre-feet of water per year to the lower-basin states (Arizona, California and Nevada), as required by a nearly century-old binding agreement.

    A compact call could be especially problematic for Front Range water providers since most of their rights that let them divert water over the Continental Divide from the Western Slope date to after the 1922 Colorado River Compact. That means mandatory cutbacks in water use could fall more heavily on the post-compact water rights of Front Range water providers.

    Colorado Springs Utilities and Aurora Water, operating together as Homestake Partners, said the problem was that the rate of release was too low. It was more a matter of flow volume than administration. Even in a dry year, a release of 175 cfs was not high enough to reliably track the water, especially when it reaches the Colorado River, which has a much higher volume of water than Homestake Creek or the Eagle River, and the reservoir release is a smaller fraction of its overall flow.

    In an email to Aspen Journalism, Homestake Partners said: “A bigger pulse of water would overcome some of the issues that DWR had in tracking the release. This sort of result is exactly what we wanted to explore — it tells us that if we, or anyone else in the state, chooses to make a state line release in the future, a higher volume of water will probably need to be released to be reliably tracked.”

    State engineers also had to deal with a river that was constantly in flux. Upstream reservoir releases and changes to irrigation diversions made for additional challenges.

    State officials said it was hard to separate the reservoir release from the rest of the Colorado River’s flow at the state line because of numerous ungaged streams and return flows from irrigation that enter the river between Palisade and the state line.

    “The ungaged inflows could not be subtracted from the total flow in the river, therefore the separated flows were too large and did not allow for the initial waves of the reservoir release to be identified,” officials said in an email.

    The total flows at the state line at the time of the reservoir release’s arrival were around 2,500 cfs, according to DWR.

    The total flows at the state line at the time of the reservoir release’s arrival were around 2,500 cfs, according to DWR.

    River District concerns

    The Glenwood Springs-based Colorado River Water Conservation District, which protects Western Slope water interests, had several concerns about the reservoir release.

    “I think it’s important that the public and the state recognize that they released 1,600 acre-feet of water during an incredibly dry period and they couldn’t actually track it to the state line,” said River District general manager Andy Mueller.

    But Mueller’s concerns go beyond the trouble with tracking. He said the state engineer did not reach out to Western Slope water users who had the potential to be injured by the release. He also doesn’t trust that the cities won’t just refill the hole created by the release with more Western Slope water.

    The River District’s main concern is that in a water-collection system as complex as Homestake Partners — with several different transmountain diversions bringing water from the Western Slope to the Front Range — it’s hard for the state to make sure they won’t take more water to replace the pool they released.

    “From our perspective, it’s very difficult for the state to verify that they haven’t just brought the water over from a different part of their diversion system,” Mueller said. “So it leaves us with a lot of skepticism, and we voiced that in several discussions.”

    To address some of these concerns, the cities are required to submit a verification plan to the state to prove three things: that they had enough space available in reservoirs on the east side of the divide to store the water, and they weren’t just releasing water downstream they couldn’t use anyway; that they actually decreased water taken through the Homestake Tunnel by the same amount as the pilot release; and that they didn’t create additional space in Homestake Reservoir to allow for greater storage this year.

    “In essence, we brought the ‘hole’ we created in our storage in Homestake Reservoir through to the East Slope when we operated the tunnel in February and March,” the Homestake Partners’ email reads. “This was accomplished by not drawing down Homestake Reservoir quite as much as we otherwise could have this winter in preparation for spring runoff.”

    Homestake Creek flows from Homestake Reservoir near Red Cliff. A pilot reservoir release to test how to get water to the state line in the event of a Colorado River Compact Call proved hard to track for state engineers.
    CREDIT: BETHANY BLITZ/ASPEN JOURNALISM

    Demand management

    The reservoir release also could have implications for a potential demand-management program, the feasibility of which the state is currently investigating. At the heart of a demand- management program is a reduction in water use on a temporary, voluntary and compensated basis in an effort to send as much as 500,000 acre-feet of water downstream to Lake Powell to bolster water levels in the giant reservoir — which spans Utah and Arizona — and, indirectly, to meet Colorado River Compact obligations.

    Under such a program, agricultural water users could get paid to temporarily fallow fields and leave more water in the river. Front Range water providers could participate by releasing water stored in Western Slope reservoirs.

    Rein was careful to say that the Homestake pilot release was in no way connected to demand management. Still, the experiment may have revealed potential problem areas should a demand-management program become reality.

    “The ability to track water that is conserved consumptive use all the way to the state line is really critical for the success of that program,” Mueller said. “And if you can’t track a slug of 1,600 acre-feet of water to the state line, how are you going to track the voluntary reduction in use of a small ditch on the West Slope that maybe they are saving 15 acre-feet?”

    Aspen Journalism covers rivers and water in collaboration with the Vail Daily and The Aspen Times. This story ran in the April 16 edition of the Vail Daily and The Aspen Times.

    #SteamboatSprings City Council begins exploring #stormwater utility fee — Steamboat Pilot & Today

    City of Steamboat Springs. Photo credit: American Rivers

    From the Steamboat Pilot & Today (Alison Berg):

    As the city’s infrastructure grows older and federal and state governments increase their standards for environment and watershed health, the city’s general fund has faced a significant strain in trying to keep up, Steamboat Water Resourced Manager Kelly Romero-Heaney and Steamboat Public Works Director Jon Snyder told council members Tuesday…

    The idea is still under consideration, but if council chose to move forward, Steamboat residents would pay a small fee that would go toward protecting water quality. While an exact amount has not been decided yet, Romero-Heaney said the fee would be less than what residents currently pay for water and sewer bills. Aspen and Silverthorne recently enacted a storm water utility fee, and Romero-Heaney said the city would likely look to those communities for guidance.

    Tuesday was the first time council members discussed such a move, and their first step would be to hire a consultant to study whether or not the idea is feasible in Steamboat…

    City staff estimated the consultant would cost between $50,000 and $100,000, which could either be included in the 2022 budget proposal, or if the council would like to move sooner, could be added as a supplemental ordinance to the 2021 budget…

    Council members tabled the discussion until their July work session.

    #ColoradoRiver Basin’s #snowpack season earns low grades: Bad news for water in the West #COriver #aridification

    From The Washington Post (Becky Bollinger):

    The lack of water worsens drought conditions, fire potential and could impact agriculture

    The snowpack season is ending in the Colorado River Basin as the spring melt is underway. If we take stock of the water supply over this vast basin, a critical resource for millions of people in the West, the news is not good.

    The snowpack season, so important for the storage of water that can be tapped during the dry summer months, fell well short of expectations. The consequences of the shortfall for the basin, encompassing Arizona and parts of six other states, from Wyoming to California, are major.

    1. There is an increased risk for large wildfires that can devastate state and national forests, reduce summer recreation activities, compromise air quality for large areas of the country and put populations near the urban-forest intersections in danger.

    2. The reduced water supply affects municipal and agricultural water users not only within the basin’s 246,000 square miles, but also outside it, including Denver, Salt Lake City and Los Angeles.

    3. Prolonged drought could ultimately affect food supply, causing reductions in crop yields and livestock herds.

    To put this season in perspective, I’ve made a report card of the various indicators of snowpack to illustrate why the low grades are so serious.

    The snowpack itself: C

    The snowpack picture seemed promising at times in recent months, especially in February when several storms unloaded hefty snows. Even now, some late season snow in the northern part of the basin is working in some extra credit. But it’s not enough.

    At the headwaters of the Colorado River, the snowpack peaked on April 2, about 10 days ahead of average. Since then, more than two inches of water have melted. In fact, since the beginning of April, the majority of stations in the upper Colorado River basin have seen melt rates between 2 and 6 inches. When the snowpack peaks and melts early it often portends a lower water supply during the dry season.

    The progression of snow water equivalent, an indicator of snowpack, in 2021 in the Colorado River Basin compared to other years. (Natural Resources Conservation Service)

    Indeed, throughout the entire Colorado River Basin, snowpack values peaked at levels well below average. From the Upper Green Basin in Wyoming and south through Utah and Colorado, many locations peaked in the bottom 25th percentile.

    Snow water equivalent percentiles, an indicator of snowpack, as of early April (Natural Resources Conservation Service)

    Soils: F

    Soils have been the problem child since the very beginning of the water season, when the summer-fall monsoon was essentially a no-show.

    If the monsoon had provided the needed moisture in June-September to the lower part of the basin and the southern portion of the upper basin, healthy soils would have been locked in during the cold season. But without the monsoon moisture, the basin went into the snowy part of the season with dry soil, essentially saddling the water supply with a debt that is far from being repaid.

    Map credit: USGS

    Streams: D

    Stream flow data doesn’t look too bad at the moment. According to the U.S. Geological Survey, the percent of the upper part of the basin observing near normal flow conditions has actually increased from 21 percent to 42 percent. But don’t let that deceive you.

    Late in the water season, streams often appear to be doing better than they actually are. So, what’s happening?

    (U. S. Geological Survey)

    Check out the hydrograph (above) from the Colorado River at the Colorado-Utah state line. The black line shows the average flow in recent months, compared with historical values (indicated by the colored shading).

    Back at the beginning of March, flows were in the brown shading, ranking in the bottom 10th percentile. More recently, you can see that flows have bumped up to the yellow category, slightly improved from the brown. But this bump is mainly due to an early rise toward the peak. That early rise has been kicked off by early melting of the snow. The “improvement” is only an artifact of the early snow melt and will not be sustained.

    Reservoirs: D

    The water stored in reservoirs is akin to the output of a group project, contingent on the performance of its contributors. Since snow quantities, soil moisture and streams underachieved, reservoirs also end up with a low grade.

    Water Supply Outlook April 1, 2021 via the Colorado Basin River Forecast Center

    According to the April 1 water supply forecast, published by the Colorado Basin River Forecast Center, all of the Colorado River Basin will experience below-average water supply.

    Across the Lower Colorado River, water supply accumulations began in January and most of the snow has completely melted. For the Lower Basin and southern half of the Upper Basin, water supplies are expected to be below 50 percent of average. Lake Powell inflows are forecast at 38 percent of average, a deficit of almost 4 million acre-feet! For perspective, current levels are already 6 million acre-feet below what they should be right now.

    Further north, the forecast is marginally better, with water supply expected to be between 50 and 70 percent.

    These low forecasts are largely based on less than stellar snowpack conditions, but dry soil moisture conditions at the beginning of the season are also considered. According to Cody Moser of the Colorado Basin River Forecast Center, antecedent soil moisture conditions can make a 5 to 10 percent difference in predicted runoff.

    Lake Powell water supply 1999 to 2019.

    Lake Powell, which represents the majority of the Upper Colorado River Basin’s water supply, has still not recovered from the drought in the early 2000s. It takes more hits from each new drought. The system had a nice recovery from the 2018 drought, but still hasn’t made up lost ground from another drought in 2012-2013. Unfortunately, we’ll put 2021 down as another year to further deplete this system.

    Becky Bolinger is the assistant state climatologist for Colorado and a research scientist at Colorado State University.

    With First-Ever #ColoradoRiver Shortage Almost Certain, States Stare Down Mandatory Cutbacks — KUNC #COriver #aridification

    In a photo from 2020, a distinct line around the rocky shore shows how much the water level has decreased in Nevada’s Lake Mead. Mead is expected to drop 15 feet in 2021 Photo credit: Roberto (Bear) Guerra/High Country News

    From KUNC (Luke Runyon):

    The latest Bureau of Reclamation reservoir projections, which take into account river flows in a given year, show a likelihood that Lake Mead on the Arizona-Nevada stateline will dip below the critical threshold of 1,075 feet in elevation in May and remain below that level for the foreseeable future.

    A first-ever official shortage declaration from the Department of the Interior is almost certain later this year. According to the terms of a 2007 agreement, a shortage is declared by the Interior Secretary after consulting with water users in the Lower Basin states of California, Arizona and Nevada. An August report is used to forecast when Lake Mead will be below 1,075 feet at the start of a calendar year.

    Extreme to exceptional drought conditions have blanketed more than 75% of the river’s upper watershed for more than eight months. The majority of the river’s water comes from high mountain snowpack in Colorado and Wyoming. Both states are dealing with drought of varying degrees of severity.

    “Current conditions resemble 2002, 2012, 2013 and the beginning of 2018, four out of the five driest years on record,” the Bureau of Reclamation report notes.

    The Colorado River’s two biggest reservoirs, Lakes Mead and Powell, have been unable to recover from sustained hot and dry conditions for the last 21 years, a phenomenon scientists link to human-induced climate change. Warmer temperatures have increased the amount of evaporation from streams and reservoirs, raised demand for water in forests and on crop fields, and changed precipitation from snow to rain. Snow acts as a large, frozen reservoir that melts slowly over months, while rain is harder to capture and dole out to farmers, cities and other users.

    Top water officials in Arizona and southern California say they are prepared for the coming cutbacks to their water supplies. If the dry conditions hold, Arizona, Nevada and Mexico could take increasingly steep cuts to what they’re allowed to divert from the river. California could also see its river allocation restricted if the declines continue.

    The basin has flirted with a shortage declaration for the last decade but has been aided by short-term boosts in snowpack, coordinated releases of water between Lakes Powell and Mead, and voluntary conservation by Lower Basin water users. Arizona, Nevada and Mexico have already been curtailed due to restrictions laid out in the 2019 Drought Contingency Plan. A shortage declaration will make those cutbacks even steeper.

    In response to the latest projections, the Central Arizona Project and the Arizona Department of Water Resources issued a joint statement. In it, the agencies assure users the state’s top water officials had been anticipating the news.

    “The study, while significant, is not a surprise,” the statement reads. “It reflects the impacts of the dry and warm conditions across the Colorado River Basin this year, as well as the effects of a prolonged drought that has impacted the Colorado River water supply.”

    Jeff Kightlinger, general manager for the Metropolitan Water District of Southern California, said in a statement the watershed so far has been able to avoid a shortage declaration because of voluntary conservation efforts. But climate change is deepening the Colorado River’s supply and demand imbalance to the point where mandatory cutbacks are coming.

    Water Supply Outlook April 1, 2021 via the Colorado Basin River Forecast Center

    @USBR and partners manage through consecutive years of #drought #RioGrande

    Rio Grande upstream near Montano, NM. Photo credit: USBR

    Here’s the release from the Bureau of Reclamation (Mary Carlson):

    The Bureau of Reclamation and U.S. Army Corps of Engineers released their Annual Operating Plan for the Rio Grande [April 15, 2021] showing below average runoff for the second year in a row.

    The amount of water in the snowpack (snow water equivalent) measured in the mountains of northern New Mexico and southern Colorado feeding the river basin is below average and a below average spring runoff is expected for the Rio Grande in New Mexico. Most reservoirs on the Rio Chama, Rio Grande, and Pecos River are holding between 10% and 50% of their capacity heading into the irrigation season. In addition, the amount of moisture in the soil right now is extremely low, compounded by high temperatures, so much of the melting snow may be absorbed or evaporate before it reaches rivers.

    “We continue to learn more about the Rio Grande and Pecos and the species that rely on them as we manage through extended drought in the region,” said Albuquerque Area Manager Jennifer Faler. “We are in close coordination with water and species management partners to ensure we make the best decisions for all water users and for the health of the rivers in a tough year like this.”

    At the end of March, snow water equivalent was 88% of average for the Rio Chama Basin, 111% of average for the Upper Rio Grande Basin, 72% for the Sangre de Cristos, and 65% for the Jemez. Based on these values, the Natural Resources Conservation Service streamflow forecast issued for the month of April predicts that the Rio Chama flow into the El Vado Reservoir will be at 52% of its average, with an inflow of about 116,000 acre-feet of water.

    Information from Annual Operating Plan:

    • Under current Rio Grande Compact storage restrictions triggered by low storage at downstream reservoirs, water can only be stored in El Vado for the Prior and Paramount lands of the six Middle Rio Grande Pueblos. The Middle Rio Grande Conservancy District began irrigation on April 1, a month later than usual, with the natural flow of the Rio Grande.
    • Due to the expected low runoff, lack of water in storage, as well as a minimal supply of water for Reclamation to lease to supplement river flows, there—s a possibility that the Albuquerque reach of the Rio Grande could experience some drying this summer along with sections of the river in the Isleta and San Acacia reaches.
      • Reclamation is coordinating with U.S. Fish and Wildlife Service to rescue fish from drying portions of the river and coordinating with partners to use the limited supply of water most effectively.
    • Rio Grande Project usable storage is currently about 245,000 acre-feet and is expected to peak at about 350,000 acre-feet before declining as irrigation releases start.
      • The irrigation season is scheduled to begin with releases from Elephant Butte Reservoir in early May and Caballo Reservoir in late May.
      • The dry riverbed between Elephant Butte and Caballo and below Caballo will take on water quickly. As such, it will be both unpredictable and dangerous and the public is asked to exercise caution around the river channel. Water levels will fluctuate through the rest of the short irrigation season.
    • On the Pecos River, basin-wide snow water equivalent was 57% of average on March 31, and the NRCS predicted 16,200 acre-feet of inflow to Santa Rosa Reservoir from March to July.
      • Reclamation is using a more conservative estimate for inflow, and the Carlsbad Irrigation District has only allocated 0.38 feet per acre, one of its lowest allocations ever.

    The Annual Operating Plan public meetings were held virtually this year in accordance with federal and state health guidelines. Those who were not able to attend the meetings can still view the presentation on Reclamation—s website at https://www.usbr.gov/uc/DocLibrary/Plans/MiddleRioGrande/20210415-MiddleRioGrandeAnnualOperatingPlan_508.pdf or contact Mary Carlson at mcarlson@usbr.gov.

    2021 Annual Operating Plan? April 1 Runoff Forecast

    Rio Grande and Pecos River basins. Map credit: By Kmusser – Own work, Elevation data from SRTM, drainage basin from GTOPO [1], U.S. stream from the National Atlas [2], all other features from Vector Map., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=11218868

    Water can be wrung out too much — Writers on the Range

    From Writers on the Range (Denise Fort):

    Santa Fe, New Mexico, once was sustained by the waters of the Santa Fe River, which begins in the high country of the Sangre de Cristo Mountains, flows through the city and then onward to the Rio Grande.

    But when Western cities grow, they look everywhere for more water, with little regard for the rivers they drain. As the city’s population grew, Santa Fe turned to its groundwater. Later, New Mexico reached across the desert to take water from the Colorado River and deliver it to Santa Fe, Albuquerque and other beneficiaries on the Rio Grande.

    And yet the Santa Fe River downstream was not reduced to a dry and dusty arroyo. In fact, the riverbed is relatively verdant, supporting cottonwoods, willows and sustaining some irrigation in communities downstream. That moisture helps make Santa Fe a beautiful place in the desert.

    That’s because the water that Santa Fe residents use to flush their toilets or pour down the drain ultimately makes its way to the wastewater treatment plant, which returns the treated water to the Santa Fe River. That could soon change.

    The city’s water bureaucrats have fastened on the idea of capturing some of that treated effluent, either to get additional “return flow” credits by returning it to the Rio Grande, or by moving to direct potable reuse, a process derided in California as “toilet to tap.”

    But both of these proposals will also take water out of the Santa Fe River, affecting downstream irrigators, wildlife and even the cultural identity of the region.

    As climate change tightens its grip on the arid West, water managers are focusing on wastewater as a source of “new” water for cities. It’s hard to blame them: Municipalities don’t need new water rights in order to reuse treated effluent.

    Communities dump their treated sewage into rivers, and downstream users draw that water, treat it, and send it to residents’ homes. Orange County and Irvine Ranch in California are pioneers in recycling wastewater. The Bureau of Reclamation now administers a fund for water-reuse projects, and the Environmental Protection Agency has made it a national priority.

    There’s another strategy that Western cities like Santa Fe are exploiting to make use of their wastewater. Instead of sending all of the treated wastewater back into the potable water supply, Santa Fe plans to send some of its wastewater to the Rio Grande via a $20 million pipeline. This would give the city the right to pump additional water from the Rio Grande. Regardless of how the city proceeds, the Santa Fe River will end up losing some of the water that provides for its existence.

    Never forget that Western water law was set up to serve users, not rivers. And under Western states’ laws, cities own their treated sewage, meaning they can use it or sell it downstream as they wish. In fact, wastewater is such a reliable supply that it gets top value at Western water auctions.

    Santa Fe’s webpages overflow with the community’s commitment to sustainability. But these values were disregarded in the city’s focus on squeezing more water out of the system for a growing populace.

    Wastewater has other values and uses, though. How do we draw attention to them? A report by the National Wildlife Federation, the Pacific Institute and the Meadows Institute warns that reusing water can inadvertently “starve natural systems of needed flows and potentially reduce water available to communities downstream.”

    Instead, the groups urge planners to “incorporate actions to protect (and where possible, enhance) river flows downstream for the benefit of people and the environment” https://pacinst.org/publication/healthy-waterways/.

    By now, years of battles over Western water should have taught water managers that while people value reliable water supplies, they also value living rivers, small farms, historic communities and recreation. The report urges water managers to consult with the public before making decisions. It also lays out a blueprint for incorporating the value of living rivers, as well as addressing water supply.

    Wringing more use from water, even wastewater, is a powerful tool in addressing water scarcity. But just like the dams, pipelines and other tools of the Cadillac Desert era, wastewater ought to be approached with respect for all of its values. The proponents of water reuse need to acknowledge this.

    Denise Fort is a contributor to Writers on the Range, writersontherange.org, an independent nonprofit dedicated to lively conversation about the West. She is professor emerita at the University of New Mexico School of Law and has co-authored three reports for the National Academies on water reuse.

    Vail melt is upon us after snow-water peak occurs in March this season — The #Vail Daily #ColoradoRiver #COrver #aridification

    From The Vail Daily (John LoConte):

    Readings top out 3.5 weeks earlier than average

    Vail Mountain has seen quite a melt over the last two weeks, and snow telemetry data shows the area snow water equivalent to have peaked on March 31.

    While there’s more moisture on the way, it’s unlikely to push the readings on the Vail Mountain snow telemetry site back over the March 31 recordings at Vail, said Eagle River Water and Sanitation District spokesperson Diane Johnson.

    The Vail Mountain site is located at an elevation of 10,300 feet, and peaked March 31 at 14.6 inches of water within the snowpack, known as snow water equivalent.

    The March 31 peak at 14.6 inches is 65% of normal peak SWE and 3.5 weeks ahead of the normal April 25 peak, Johnson said.

    Johnson said while the rain and snow in the forecast is very welcome given the conditions, “it’s unlikely to affect the peak since Vail has already dropped so much.”

    The April 12 reading on Vail Mountain is 11.5 inches, down 3.1 inches in two weeks…

    Copper Mountain’s SWE peaked April 2, nearly four weeks ahead of its normal April 28 peak. The site recorded 12.4 inches of water within the snowpack, which is 80% of its normal peak. The Copper Mountain snow telemetry site is at 10,550 feet and is the closest official measurement site to the headwaters of Gore Creek, which runs through Vail Village.

    At Fremont Pass, which is the site closest to the headwaters of the Eagle River, an April 5 reading shows 13.4 inches of water within the snowpack, which could be the peak, although it’s still too early to tell, Johnson said. The April 12 reading at Fremont Pass shows 13.2 inches…

    The Eagle River Water and Sanitation District says the extreme drought which started in August 2020 is likely to continue into this summer.

    Low flows on #DoloresRiver will hurt fish — The #Cortez Journal #snowpack #runoff

    Dolores River snowpack
    April 16, 2021 via the NRCS.

    From The Cortez Journal (Jim Mimiaga):

    Below-average snowpack and ongoing drought will hurt flows and fish habitat below McPhee Dam going into spring and summer, reports Colorado Parks and Wildlife.

    Water releases from the dam are expected to be under 15 cubic feet per second and could possibly drop as low as 3 cfs, said Jim White, a CPW aquatic biologist, in a April 14 news release.

    During normal snowpack years, McPhee Reservoir fills, and the allocated fish pool allows for a sustained dam release of 60 cfs in summer.

    Fish flows increase if snowpack runoff exceeds reservoir capacity, which prompts a recreational boating release. But a recreational water release will not happen this year because of below average snowpack and low reservoir carryover from last water season.

    As of April 13, Snotels in the Dolores Basin reported 39% of average snowpack for snow water equivalent.

    Trout and native fish will be adversely impacted by the water shortage below the dam, White said.

    The 12-mile section of river that flows through the Lone Dome State Wildlife Area from below the dam to Bradfield Bridge is a popular tail-water fishery. Most trout fishing is done within the first 6 miles.

    White said the lower flows will shrink the river habitat, and many brown and rainbow trout likely will die. The water coming out of the dam is about 42 degrees Fahrenheit, which is an ideal temperature for trout. But with such a low flow the water will warm quickly as it moves downstream…

    Roundtail chub

    The low flows will also affect native fish that live in the lower reaches of the Dolores River ─ the flannelmouth sucker, the bluehead sucker and the roundtail chub. The fish, listed by CPW as species of concern, have adapted to warm water, but they still need pools and flowing water to survive.

    White is concerned about lower sections of the river drying up or being connected by only tiny rivulets of water.

    Making the problem worse is the smallmouth bass, an invasive non-native fish that thrives in the lower Dolores River but preys on young native fish. Anglers are encouraged to fish for smallmouth bass; they are abundant, fairly easy to catch, tasty and have no bag or possession limit.

    As drought continues to grip the West, more and more rivers will face the same scenario — this year and beyond.

    “All of this is a result of three things: low snowpack, dry soil that will absorb runoff and no carryover water in the reservoir from last year,” White said.

    Dolores River watershed

    Why do #water managers pay such close attention to the 24-Month #ColoradoRiver Study? — Central #Arizona Project #COriver

    Here’s the release from the Central Arizona Project (DeEtte Person):

    A linked lifeline

    Colorado River water managers, like CAP, rely upon operating guidelines related to the amount of water stored in the two major Colorado River Basin Reservoirs – Lake Powell and Lake Mead. The operating guidelines determine how much water will be released from those reservoirs to meet water-user needs. The two reservoirs are operated under a system called conjunctive management, meaning the storage conditions in one reservoir affect the releases in the other. Since 2007, the 24-Month Study has been used to implement the operational decisions directed by the guidelines.

    How Lake Powell and Lake Mead are designed to rise and fall together

    The two largest water supply reservoirs in the United States are part of the Colorado River system—Lake Mead at the Arizona/Nevada border and Lake Powell at the Arizona/Utah border. These two reservoirs are linked by the Colorado River through the Grand Canyon and provide about 90 percent of the system’s storage capacity, supplying seven states and Mexico with water.

    The enormous storage capacity in these two reservoirs has provided the resiliency to continue Colorado River water supply deliveries during more than two decades of drought. The two lakes also provide vital, clean, renewable hydroelectricity used across the western United States, as well as environmental and recreational benefits.

    Conjunctive Management

    In order to operate the Colorado River system efficiently and make optimal use of the available storage in these vital reservoirs, the operations of Lake Powell and Lake Mead are coordinated, known as conjunctive management. In fact, conjunctive management is required by the Colorado River Basin Project Act, which was signed more than 50 years ago to provide a program for the comprehensive development and augmentation of the Colorado River supplies throughout the Upper and Lower Colorado River Basins.

    One important goal of coordinated long-term management of these reservoirs is to maintain “as nearly as practicable” equal contents of active storage in Lake Powell and Lake Mead. Lake Mead has about 28 million acre feet (MAF) of storage and Lake Powell can store about 26 MAF. One acre foot can serve three families for a year – so you can see that’s a lot of water!

    Shortage Sharing

    In 2005, the U.S. Secretary of the Interior directed the Bureau of Reclamation to develop additional strategies for improving the coordinated management of these two reservoirs. The goal was to honor the intent of the Colorado River Basin Project Act, while sharing the water between the Upper (Colorado, New Mexico, Utah and Wyoming) and Lower (Arizona, California and Nevada) Basins during times of lower reservoir levels. The result was the Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead, known as the 2007 Guidelines. These guidelines remain in effect through Dec. 31, 2025.

    How It Works – 4 Scenarios

    The essence of this coordinated approach is that releases and reductions will be coordinated to share risks to water users in each basin. Detailed descriptions and definitions can be found in the 2007 Guidelines, but here is the cheat sheet explaining four basic scenarios:

    Normal Supply – If storage and risks are relatively equal in both reservoirs, then Lake Powell will release a “normal” supply to Lake Mead. “Normal Supply” is a release of 8.23 MAF.

    Equalization – When runoff is high and inflows into Lake Powell raise the lake’s elevation, increasing the storage level, more water is released to flow down the river to Lake Mead in an attempt to “equalize” Lake Powell’s storage with Lake Mead’s, through what is termed “Equalization.”

    Balancing Release – If Lake Powell gains storage while Lake Mead is at risk of shortage triggers, additional water will be released from Lake Powell to “balance” risks between the two reservoirs in what is termed a “Balancing Release.”

    Mid-elevation release – If Lake Powell is at risk of approaching critically low elevations while Lake Mead is at a more moderate risk, less water is released from Lake Powell to Lake Mead in what is termed a “Mid-elevation release.”
    These operating criteria serve to meet the goals of coordinated operations between Lake Powell and Lake Mead, so the storage in both reservoirs generally rise and fall together. Through the coordinated operations of Lake Powell and Lake Mead, we become one basin – sharing risks and opportunities – linked by two great reservoirs.