Initial fill of Chimney Hollow Reservoir — Northern Water #ColoradoRiver #COriver #aridification #SouthPlatteRiver

Navajo Dam operations update: Bumping releases to 500 CFS May 5, 2026 #SanJuanRiver

From email from Reclamation (Conor Felletter):

May 4, 2026

The Bureau of Reclamation has adjusted the release schedule from Navajo Dam due to downstream maintenance activities. On Tuesday, May 5th at 4:00 AM, the release will increase from 450 to 500 cubic feet per second (cfs). A further increase to 550 cfs is planned for Thursday, May 7th at 4:00 AM.

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

This scheduled release change is subject to changes in river flows and weather conditions.  If you have any questions, please contact Conor Felletter (cfelletter@usbr.gov or 970-637-1985), or visit Reclamation’s Navajo Dam website at https://www.usbr.gov/uc/water/crsp/cs/nvd.html

MAYDAY! #Snowpack Report: And fact-checking #ColoradoRiver claims — Jonathan P. Thompson (LandDesk.org) #COriver #aridification

Muddy Creek living up to its name just before it runs into Paonia Reservoir, which was about 70% full on April 30. Jonathan P. Thompson photo.

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

May 1, 2026

⛈️ Wacky Weather Watch⚡️

If someone were to be dropped from another planet into the North Fork Valley in western Colorado today, they would be forgiven for assuming there is not a water crisis. A thick carpet of green covers the valley floor, the irrigation canals are filled to the brim, trees are leafing out, the river is running and Paonia Reservoir is almost full, and the mountains are still graced with snow.

I didn’t even come from outer space — I think — and I find the contrast between the news reports of water shortages and restrictions and the on-the-ground situation here to be quite jarring. Is it possible that April precipitation has averted the calamity?

A green hay field on a mesa in the North Fork Valley in western Colorado. Jonathan P. Thompson photo.

Yes, a series of storms, some quite abundant, have moved through the Upper Colorado River Basin, boosting snowpack and soothing the desiccated earth. It has certainly felt cooler and wetter than normal, but that was mostly an illusion brought on by the abnormally dry winter and the searing March heatwave. And it hasn’t been nearly enough to offset the warm winter and the lack of snow, as the graphs below indicate.

As for the full ditches, I guess you could attribute that to a “make hay while the water is available” sort of ethos. You might as well douse the fields and fill ponds while spring runoff is in full swing and the river still runs, knowing that it may not last beyond June. Meanwhile, Paonia Reservoir’s relatively healthy levels are the result of the Fire Mountain irrigation canal — which relies on reservoir water — being shut down for emergency repairs.

Meanwhile, there is a conspicuous absence here in this agricultural hotspot: There are no blossoms or fruit on apple, cherry, peach, or pear trees. The March heatwave sparked a spectacular orchard super-bloom. That was followed by a devastating freeze that killed all of the fruit, even in orchards where extreme preventative measures were taken, and even “burned” the leaves on some trees. Wacky weather indeed.

The North Fork of the Gunnison’s May 1 snowpack this year is tied for the lowest on record with 2012.
The Animas River watershed did get enough of a boost to bring snowpack levels back up above 2002’s for this date. Source: NRCS.
Even with the recent storms, the Upper Colorado River Basin snowpack remained at record-low levels as of May 1. The previous low year (from 40 years of SNOTEL records) was 2012, with 2002 and 2018 not far behind. Source: NRCS.
🐟 Colorado River Chronicles 💧

Phil Lyman, the former and hopeful Utah politician, recently posted this on Facebook:

Just to sum it up: He’s knocking a federal program that pays willing farmers to voluntarily cut off irrigation to their fields in order to conserve water in an effort to balance Colorado River demand with the shrinking supplies. And he’s blaming it all on California. 

Lyman’s general sentiment is not new, nor is it uncommon among water users in the Upper Basin states. In fact, it’s basically a cliché. Since I was a kid I’ve heard folks saying something along the lines of: If we don’t use the water, it’ll just run on down to California, where those L.A. folks will guzzle it up to fill their swimming pools and water their golf courses. It’s a rather simplistic view, and one that doesn’t account for the realities of water law or the way the Colorado River system works. In other words, it’s just plain wrong, and a candidate for Congress — as Lyman is — should know better.

Udall/Overpeck 4-panel Figure Colorado River temperature/precipitation/natural flows with trend. Lake Mead and Lake Powell storage. Updated through Water Year 2025. Note the tiny points on the annual data so that you can flyspeck the individual years. Credit: Brad Udall

The Colorado River and its users have a problem: Demand for the water exceeds supply, and the supply is continually shrinking. Since boosting supply is not a feasible option, demand — i.e. consumptive use — must be reduced significantly. While everyone must make cuts, agriculture is the river’s largest water user by far, meaning that sector is going to have to make the largest cuts, by volume. This isn’t about demonizing farmers or alfalfa, it’s not about whether Californians or Utahns are more deserving of the water. It’s simple math.

The farm fallowing program is one way to cut consumption quickly by paying willing farmers to voluntarily forego irrigating some or all of their fields on a year-by-year basis. It’s not ideal, but it is legal, voluntary, and can save junior water rights holders, including cities and towns throughout the watershed, from being forced to shut off their water intakes. And in no way is farm fallowing exclusive to Utah. It’s occurring all over the place.

Let’s do a little fact-check of Lyman’s other points:

  • Farm fallowing in Utah is being done to benefit California, which “demolished its water storage infrastructure.” No and no. The goal here is to leave a little more water in the river, to keep the whole system from collapsing. Any amount conserved in one place will potentially benefit all other river users, as well as the river itself. Foregoing irrigation on a Utah farm, for example, could help keep the taps on in St. George or some other Utah community that relies on the river. Dams have been removed in California, most significantly four structures on the Lower Klamath River. But those were primarily for hydropower production, not irrigation or water storage, and they are far removed from the Colorado River or any associated water storage.
  • “Paying farmers not to feed us to bail out California’s failures …” Actually, the feds and state and other programs mostly are paying farmers not to grow alfalfa or hay, which feed cattle, and it has nothing to do with California’s “failures.” Indeed, California grows a lot of alfalfa, too, but it also grows all kinds of vegetables — far more than in Utah.
  • If the water saved in Utah does make it to the Lower Basin and California, then the biggest beneficiary would be … farmers. Most of the water in the Lower Basin goes to the Imperial Irrigation District, where it is used for farming. Those farmers have also been part of the federal fallowing program, and have managed collectively to reduced their Colorado River water consumption by about nearly 1 million acre-feet since 2003.
  • Lyman calls for eliminating or restructuring federal farm fallowing programs. I’m curious if he’s talked to the farmers about this, especially the ones who may lose their water and be forced to fallow anyway. Isn’t it better to get paid not to grow something than to not get paid for it?
  • “… fight to end federal policies that separate water from the people who depend on it. Water rights are property rights.” We all depend on water; the California farmers depend on water just as much as Utah farmers do. Furthermore, the California farmers also own their land, they have some of the most senior water rights on the Colorado River, and according to the “Law of the River,” they could likely go to court to force many Utah farmers to stop irrigating altogether, without compensation. The farm fallowing program does not separate water from the farmers, it simply pays them to temporarily forego irrigation.
  • “… end the war on farm water.” Look, there is not enough water in the Colorado River for everyone. Everyone will have to take cuts, but irrigated agriculture is the biggest user by far, and therefore will have to make cuts in order to balance supply and demand. It’s simple math: All of Las Vegas and southern Nevada use less than one-tenth of the water that goes to the farms in the Imperial Irrigation District.
  • “… propose that the federal government build and operate desalination plants in California to free up Colorado River water for Utah …” Desalination will likely be a part of the West’s water future, especially for coastal urban areas. But building the plants, and processing and transporting these kinds of volumes of water, would be outrageously expensive and energy-intensive, which would be especially harmful to farmers, who rely on cheap water.

***

The Bureau of Reclamation recently decreased Glen Canyon Dam releases from about 8,200 cfs to a steady 7,000 cfs (without the usual nighttime reductions). This appears to be the lowest sustained releases since the dam was built, and if continued throughout the entire year would lead to only 5 million acre-feet of annual releases, which would make the Lower Basin states even more grumpy and litigation-happy than they already are.

But not to worry, the feds are still on course to release 6 MAF for the water year, because they released about 10,000 cfs during January and February. Still, it’s going to change the complexion of rafting in the Grand Canyon, for sure, and it is certainly pushing the boundaries of the Grand Canyon Protection Act.

📸 Parting Shot 🎞️

Snow falls on the Abajo Mountains in southeastern Utah as seen from near Dove Creek, Colorado. Jonathan P. Thompson photo.

$40 Million in state water grants flow to drought-stressed #Colorado communities — Jerd Smith (Fresh Water News)

Denver North High School at dusk. Photo credit: Humphries Poli Architects

Click the link to read the article on the Water Education Colorado website (Jerd Smith):

April 30, 2026

The Colorado Water Conservation Board is funneling $40 million to dozens of water projects statewide as communities grapple with a drought emergency that is making saving water more important than ever before.

Among the 136 projects receiving state support this fiscal year, which ends June 30, is a $2.3 million grant that will pay nearly half the cost to install new, automated irrigation control systems across 105 Denver Public School system sites. Another grant, for $227,225, will help the city of Trinidad with early studies on repairing and potentially enlarging Monument Lake Reservoir. 

Photo credit: Monument Lake Resort

Still another grant, for $111,855, will help pay to train and certify metro area teens in becoming turf replacement specialists. Operated by the Neighborhood Resilience Corps, the initiative will replace 23,000 acres of grass at sites that include the Governor’s Mansion and other state facilities.

The grant awards come as Colorado faces a stunning drought year in which winter mountain snows were historically low and a spring heat wave melted those snows early, slashing water available for cities, industries and farms to use.

Aurora, for instance, is expecting just 10% of its normal water supplies this year, according to Tim York, manager of water conservation for Aurora Water, and its reservoirs stand at 57% full.

As cities broadcast the need to cut back water use to preserve water stored in reservoirs, homeowners and businesses have flooded cities like Aurora with requests for help to design drought-proof landscapes and replace thirsty bluegrasses with lawns that need much less water.

“Our approved applications have doubled over what they were last year, so that is pretty good,” York said, referring to applications for Aurora’s landscape conversion program. “Our free design program is similar. We have a waitlist.”

He said the CWCB grants, coupled with Aurora’s aggressive water conservation initiatives, are critical to helping the state cope with the drought emergency and create more sustainable water systems.

Aurora is a supporter of the Neighborhood Resilience Corps’ youth training effort. York said the opportunity to train young people is important.

“Anytime we can do that with young adults who are interested, it’s always a great idea,” he said. “We might do the conversions, but if we can get that benefit and inspire and teach young adults, why not.” York was referring to the city’s programs that remove thirsty lawns and replace them with drought tolerant landscapes.” 

Boulder-based Resource Central, another agency that has partnered with the CWCB on statewide conservation efforts, said it is seeing an unprecedented number of requests for its services.

“Demand for conservation programs is off the charts,” said Neal Lurie, president of the nonprofit agency. “We’ve seen more interest in the first three weeks of this spring season than we did all of last year.

“To me that says the message is resonating with people that they have an important role to play,” he said. “That’s good news.”

More by Jerd Smith

Colorado Rivers. Credit: Geology.com

Colorado River Board of #California: Lower Basin States Advance Plan to Deliver up to 3.2 Million AF Through 2028 to Protect #ColoradoRiver — Doug MacEachern, Bronson Mack, and Fernando Castro-Alvarez #COriver #aridification

Udall/Overpeck 4-panel Figure Colorado River temperature/precipitation/natural flows with trend. Lake Mead and Lake Powell storage. Updated through Water Year 2025. Note the tiny points on the annual data so that you can flyspeck the individual years. Credit: Brad Udall

Click the link to read the release on the Colorado River Board of California website:

May 1, 2026

The Lower Basin States of Arizona, California, and Nevada today advanced a plan to stabilize the Colorado River through 2028, responding to declining reservoir levels, record low inflows to Lake Powell, and increasing risk of reaching critical elevations at both Lake Powell and Lake Mead.

Earlier in the post-2026 process, the Lower Basin took a significant step by proposing 1.25 million acre-feet in annual reductions, with an additional 250,000 acre-feet from Mexico, totaling approximately 1.5 million acre-feet per year.

This proposal builds on that foundation with an expanded system conservation program across the Lower Basin with an estimated contribution of at least 700,000 acre-feet. In total, the plan identifies up to 3.2 million acre-feet of water savings to the system through 2028.

The proposal is an integrated package addressing Lake Powell releases, Upper Initial Unit operations, Lower Basin reductions, additional conservation, use of Intentionally Created Surplus, and system infrastructure improvements. Lower Basin contributions are contingent on these coordinated operations to ensure system stability as well as appropriate funding.

“With this proposal, the Lower Basin is putting forth real action to stabilize water supply along the Colorado River. We’re putting forward additional measurable water contributions for the system. Without that, the system will continue to decline,” said JB Hamby

“This proposal is about moving from ideas to implementation,” said John Entsminger. “It pairs real measurable water contributions with sensible dry-condition operations at Lake Powell and across the Upper Initial Units. Now is the time for every water user in the Basin to double down on water conservation as we face historically dry hydrology.”

“This proposal reflects the creativity and commitment of water users across the Lower Basin who continue to step forward with solutions that support the river,” said Tom Buschatzke. “We have shown that collaborative, voluntary efforts and reductions that are certain can produce meaningful water savings.”

The Lower Basin states recognize the Upper Basin’s call for mediation and are open to that process. However, current conditions require immediate, measurable water reductions from every state. The Lower Basin states stand ready to engage in a meaningful process for long-term solutions while encouraging the Upper Basin to step forward now with verifiable water contributions to help stabilize the system and support a near-term, seven-state bridge.

The Lower Basin states confirmed that the proposal preserves legal accountability under the Colorado River Compact, including Upper Basin delivery obligations, while maintaining a clear path toward a broader agreement among all seven Basin States.

The plan has been advanced to the federal government for consideration as part of the ongoing post-2026 planning process and is intended to provide a near-term bridge through 2028 while long-term operating guidelines are finalized.

Implementation of key elements of the proposal, including expanded system conservation, will require federal partnership. The proposal remains subject to approval by the Arizona Legislature and relevant California and Nevada water agency governing boards.

Press Contacts: 

Arizona: Doug MacEachern, dmaceachern@azwater.gov

Nevada: Bronson Mack, bronson.mack@snwa.com

California: Fernando Castro-Alvarez, fscastro@iid.com

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

The Central #Arizona Project supports historic three-state #ColoradoRiver deal #COriver #aridification

Colorado River. Photo credit: Central Arizona Project

May 1, 2026

The situation on the Colorado River is dire. Flows have reached historic lows and water saved in major storage reservoirs is approaching critical elevations. To date, solutions to the crisis have been elusive, with lengthy litigation looming as the seven states that share the river have been unable to agree on an appropriate remedy to the situation. That is why today’s announcement that the Lower Division States of Arizona, California and Nevada have come together to announce a bridge proposal that will support the entire Colorado River system through 2028 represents a welcome lifeline and cause for hope. This three-state proposal is a two-year, comprehensive package that will commit a minimum of 3.2 million acre-feet of Lower Division water savings in Lake Mead by 2028

The proposal is a bridge, a pathway to future operations that extend beyond the expiration of the existing river operating guidelines at the end of 2026. However, this massive sacrifice by the Lower Division States is only possible by implementing the entire proposal, which requires a series of critical actions by the federal government. The federal government must commit the remainder of Colorado River drought funding to offset impacts to Lower Division users, create a tribal pool to meet federal responsibilities to tribal communities, and use the reservoirs upstream of Lake Mead for their foundational purpose — meeting water delivery obligations to the Lower Division. Congress built those upstream dams for the purpose of releasing water and meeting minimum obligations to the Lower Division under the Colorado River Compact during an extended drought like the one we face today and now, the dams must be used as mandated by Congress.

Today’s announcement is the latest in a series of actions by the Lower Division States to preserve the stability of the Colorado River system. Lake Mead would be in the mud if not for Lower Division water users leaving water in the lake to protect the system, and every drop that has been left in Lake Mead is benefiting Lake Powell and the Upper Division by allowing for less water to be released downstream.

But Lower Division actions alone cannot protect the entire system from extraordinarily dry years. This year is an example where, despite the Lower Division’s ongoing reductions and contributions, Lake Powell needed additional emergency action.

While this new Lower Division bridge requires no action from the Upper Division states, it is well past time that the Upper Division States agree to be part of the solution by committing to verifiably conserve water and end their out-of-touch demand that the Upper Division be allowed to increase their total uses from a shrinking system.

The Central Arizona Project applauds the Lower Division States for developing the proposal and urges the federal government to speedily approve this emergency effort to bridge the river system through 2028.

#GlenCanyonDam Faces Its Existential Moment — Brett Walton (circleofblue.org) #ColoradoRiver #COriver #aridification

Glen Canyon Dam. Photo credit: Circle of Blue

Click the link to read the article on the Circle of Blue website (Brett Walton):

April 29, 2026

This story was produced by Circle of Blue, in partnership with The Water Desk at the University of Colorado Boulder’s Center for Environmental Journalism.

KEY POINTS

  • Glen Canyon Dam, completed in 1963, was not designed to be operated at extremely low water levels in Lake Powell.
  • The decline of Lake Powell is putting hydropower generation and downstream water deliveries at risk.
  • The Bureau of Reclamation, the federal water manager, is studying options for retrofitting Glen Canyon Dam.

In the span of U.S. history certain years are turning points, milestones in the nation’s story. 1776. 1865. 1929. 1968. Circumstance and consequence conspire to make it so.

For the Colorado River and those who rely on it, 2026 is on the verge of similar prominence. Circumstances in the basin today are that urgent.

Udall/Overpeck 4-panel Figure Colorado River temperature/precipitation/natural flows with trend. Lake Mead and Lake Powell storage. Updated through Water Year 2025. Note the tiny points on the annual data so that you can flyspeck the individual years. Credit: Brad Udall

A slow-developing water supply calamity, decades in the making, has boiled over, like a cold war turning hot. Extreme heat in March – triple-digit temperatures never witnessed that early in the year – obliterated a meager snowpack. The basin’s big reservoirs, the supposed buffers against short-term drought, were already uncomfortably low after a quarter-century of declining river flows. They will drop even lower. The amount of water flowing this summer into Lake Powell, the nation’s second-largest reservoir, will be one of the smallest ever measured, barely a trickle.

“This is unprecedented, but it’s not unpredicted,” said Eric Balken, executive director of the Glen Canyon Institute. “I like to say that this is the most predicted disaster of all time.”

Lake Powell is formed by Glen Canyon Dam, a striking 710-ft tall concrete arch braced against ruddy sandstone walls. It plugs the Colorado just after the river enters Arizona. Meant to ensure water deliveries to the lower basin states of Arizona, California, and Nevada, Glen Canyon Dam was finished in 1963 to complement the Colorado River’s audacious engineering that distributes water through mountains and uphill to the largest cities in the Southwest and to the region’s most productive farmland. When full, Lake Powell holds enough water to flood the entire state of Virginia to the depth of one foot.

Climate change and water demand that still exceeds supply have flipped the engineering script. Lake Powell is less than 25 percent full today. Glen Canyon Dam, instead of being a guarantor of water, is now the most significant water chokepoint in the basin. The hard-won asset has become a glaring liability.

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

The reversal of fortune is because of how Glen Canyon Dam was designed. The dam was never meant to be operated at the extremely low water levels that Lake Powell is rapidly approaching. Doing so for extended periods of time could damage the pipes that move water through the dam, according to the Bureau of Reclamation, the federal agency that manages the structure.

Reclamation is now studying its options for retrofitting Glen Canyon Dam to accommodate a lower Lake Powell. It expects to release those findings later this year or in early 2027. As any home remodeler knows, renovating an aging structure is neither quick nor cheap, especially when failure could have disastrous consequences.

In the short term, Reclamation is relying on operational band-aids for Glen Canyon Dam and Lake Powell. With the consent of the seven states in the basin – Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming – the agency took unprecedented action this month to prop up the reservoir. Releasing more water from upstream reservoirs and holding back more in Powell will delay Glen Canyon’s infrastructure reckoning. But that day will soon come, and Reclamation’s answer to the dam’s engineering problems will have far-reaching implications – not only for the reliability of the basin’s water supply, but also for its power customers, ecology, and recreation economy.

An Assessment Deferred

Dams are difficult to manage under any circumstance. Management is even more troublesome when operators must balance multiple, conflicting objectives. In Glen Canyon’s case those objectives are water supply, flood control, hydropower generation, and releasing water to protect the ecology downstream in the Grand Canyon – namely, beach-building and threatened native fish like the humpback chub. This is in addition to ensuring the safe operation of the dam itself.

As of late April 2026, Lake Powell was just 25 percent full and projected to drop to a record low in the next 12 months. Photo © Brett Walton/Circle of Blue

How to operate Glen Canyon Dam and Hoover Dam, its larger downstream sibling, is what the seven basin states and Reclamation are attempting to figure out right now. The current agreement covers operations through 2026. Reclamation published a draft environmental impact statement, or EIS, in January that would impose severe cuts on water users in the lower basin, particularly Arizona, in part to protect Glen Canyon Dam’s fragile infrastructure.

For that reason, water users in the lower basin and elsewhere support an engineering fix for Glen Canyon Dam. Many were incredulous that Reclamation did not include an assessment of dam modifications in its draft environmental analysis.

“This EIS could have been a great avenue to look at real changes at Glen Canyon Dam that could solve the water delivery problem and some of the ecological problems, too,” Balken said. 

Patrick Dent is the assistant general manager for water policy at the Central Arizona Project (CAP), which delivers Colorado River water to the densely populated center of the state. He said that CAP does not favor any particular fix – only one that provides dam managers with more flexibility.

“Our primary interest is that they could release water at a lower lake level,” Dent said.

The Gila River Indian Community, which receives Colorado River water through CAP, told Reclamation that the agency has a duty to safeguard the tribe’s water rights, which are at risk if the dam cannot release enough water. “The United States must take action to fix Glen Canyon Dam,” Gov. Stephen Roe Lewis wrote in a March 2026 letter.

The Colorado Water Conservation Board, which represents that state’s water interests, said it supports a reevaluation of Glen Canyon Dam, but “in a separate action” from the EIS.

Becki Bryant, a Reclamation spokesperson, said the agency will release an appraisal study assessing three dam modification alternatives at the end of this year or in early 2027. Any action beyond the study, she said, requires congressional authorization and funding.

Illustration from the report, “Antique Plumbing & Leadership Postponed” from the Utah Rivers Council,
Glen Canyon Institute and the Great Basin Water Network. Courtesy of Utah Rivers Council

‘Antiquated Plumbing’

The tool for managing the dam’s multiple objectives, which are a legislative requirement as well as a practical necessity, is the water held in Lake Powell, said David Wegner, a scientist who has worked on Glen Canyon policy for more than four decades. But even water has limits when the engineering is inadequate. “Sadly, these dams were not built for multiple objectives,” Wegner said. And Glen Canyon was certainly not built for extremely low water, he added.

Glen Canyon Dam, completed in 1963, was not designed to be operated at extremely low water levels that Lake Powell is now approaching. Photo © Brett Walton/Circle of Blue

The problem with Glen Canyon is what a coalition of environmental groups calls the dam’s “antiquated plumbing.” The groups – Glen Canyon Institute, Great Basin Water Network, and Utah Rivers Council – published a report in August 2022 that outlined these engineering deficiencies.

Water can exit Glen Canyon in only three ways. One is the spillways, a pressure-release valve for flooding, which are located at elevation 3,648 feet, near the top of the dam. They are irrelevant today. Lake Powell rests 122 feet below them.

The main exit point is through the eight penstocks, the 15-foot diameter tubes that move water through the turbines to generate hydroelectricity. The penstocks are incapacitated when Powell drops below 3,490 feet. (The lake today is 36 feet higher than that level.) If the lake falls below what is known as minimum power pool, hydropower generation also ceases.

If that happens, water must be released through four 8-foot diameter pipes called the river outlet works. Smaller than the penstocks, the river outlet works are located at elevation 3,370. Below that elevation water cannot be released from Powell, a status known ominously as “dead pool.” (Functionally, the river outlet works may be useless at elevation 3,394, Reclamation says.)

The environmental groups identified two limitations with the river outlet works. One is that they were not designed to be operated full-time. They are a role player, not the star. The other is that their smaller size means less water can pass through them. That’s a problem because the upper basin states of Colorado, New Mexico, Utah, and Wyoming are required to send a set amount of water downstream to the lower basin, according to the 1922 Colorado River Compact that divided the river.

The flow restrictions imposed by the river outlet works, if they had to be used full time, means that the upper basin could violate the compact, which could mean water cutbacks imposed by the lower basin.

“It’s just so counterintuitive that the tool that was designed to meet this delivery obligation” – the construction of Glen Canyon Dam – “is now going to be the roadblock that may prevent the delivery obligation from being met,” said Balken of the Glen Canyon Institute.

The engineering problems are not a new discovery. Wegner, who was with the Bureau of Reclamation at the time as its Grand Canyon environmental studies manager, helped lead a 1987 National Academies report on Glen Canyon. The report recommended that the Interior Department consider the “installation and operation of multiple outlet structures” at Glen Canyon, which would give dam managers more flexibility with water releases.

Glen Canyon Dam’s powerhouse sits at the base of the 710-foot-tall structure. Hydroelectric generation has dropped in tandem with the falling water levels in Lake Powell. Photo © Brett Walton/Circle of Blue

Glen Canyon’s structural problems were substantiated in 2023, when Reclamation used the river outlet works during an experimental “high-flow” release of water to flush sediment downstream and rebuild eroding Grand Canyon beaches.

The high-volume release caused pitting, or cavitation, within the river outlet works, a risk that was heightened due to the physics of water when Lake Powell is low. Reclamation coated the pipes with epoxy as a temporary fix to prevent more damage, a process that took several months. The agency has since used two small-scale physical models at its Technical Service Center in Denver to test dam operations at low water levels and the effect on infrastructure.

Reclamation acknowledged the limitations of the river outlet works in a technical memopublished in March 2024 by Richard Lafond, director of the agency’s Technical Service Center. The memo’s conclusions were endorsed by the top decision-makers in Reclamation’s Upper Colorado River Office.

“Long term operation of the river outlet works will result in accelerating regular operation and maintenance tasks,” LaFond wrote. Reclamation should “not rely on the river outlet works as the sole means for releasing water from Glen Canyon Dam.”

Wegner put it in starker terms. If the river outlet works had to be relied upon and the pipes began to erode again, then Reclamation could potentially lose control of water flows.

“Potentially that could fail,” Wegner said, meaning an inability to control water releases through the dam if the pipes are structurally compromised. “And if that fails, now you have a catastrophe on your hand and you have limited options to manage that catastrophe.” 

In other words, there would be no way to release water downstream into the Grand Canyon and into the lower basin.

Neither Quick Nor Easy

What fixes are possible? Reclamation received $2 million from Congress in the fiscal year 2022 budget for an appraisal study.

Reclamation outlined three engineering possibilities in a 2023 presentation, most of which centered on preserving hydropower generation as Lake Powell declines.

One possibility is a new, lower intake that uses the existing power generation turbines. An intake located deeper in the reservoir would allow Glen Canyon to pass water in what is currently dead pool. But it would entail “increased risk from penetration through the dam.”

The second would connect new power generation equipment to the river outlet works.

The third option is tunneling through the canyon wall and installing a new underground power station. This would also provide more flexibility for water releases.

Reclamation also included three operational or policy changes for power production, including investing in wind and solar to offset hydropower declines.

Other ideas that seemed kooky and fringe just a few years ago – draining Lake Powell and filling Lake Mead first; changing the basin’s water accounting system – are now being discussed throughout the basin with more seriousness and candor.

Beyond that presentation, Reclamation has not said much publicly about dam modification. The agency declined an interview request to discuss Glen Canyon Dam’s engineering problems.

Whatever direction Reclamation chooses – an option outlined above or something new – the process will not be quick or easy. Any change to Glen Canyon must go through an environmental analysis and public comment period. Congress will have to authorize actions and appropriate the funds. Construction alone will take years.

Wegner, who was the staff director for the House Natural Resources Water and Power Subcommittee from 2008 to 2014, knows the difficulty and sees a lack of leadership. “There’s nobody in Washington who has been willing to lead the charge trying to get Congress to provide authorized funding to do this sort of work.”

‘Reservoir Triage’

Because Reclamation is not confident it can operate the river outlet works for an extended run, the agency is focused on keeping Powell above elevation 3,500 feet.

Protecting 3,500 feet comes with all sorts of baggage. It preserves hydropower generation, which power customers appreciate. But in effect the redline at that elevation strands some 4.4 million acre-feet in Lake Powell. (Only 3.7 million acre-feet is technically accessible with the current plumbing.) Some have called this elevation a “de facto” dead pool. Thus, the agitation in the lower basin for a plumbing system within the dam that provides access to this water.

The mineral “bath tub ring” above Lake Powell shows where its water level has been. Photo © Brett Walton/Circle of Blue

Balken said that downstream water deliveries, not preserving hydropower, should be Reclamation’s biggest concern.

“When these decision makers are talking about Glen Canyon Dam from only a hydropower perspective, I think it’s missing the larger point, which is the dam is about to become the biggest roadblock of water deliveries that the basin has ever seen,” Balken said.

Flaming Gorge Reservoir, on the Green River, straddles the Wyoming-Utah border south of Rock Springs. The Flaming Gorge dam, on the Utah side, was completed in 1964 and is a critical component of the Colorado River water storage system. The Green River, the chief tributary to the Colorado River, originates in the Wind River Range, flows to Flaming Gorge Reservoir, then connects with the Colorado River in Canyonlands National Park in Utah.

To avoid the infrastructure risks of dropping below 3,500 feet, Reclamation has started to take extraordinary action. The agency has two emergency levers it is pulling. One is to hold more water back in Lake Powell. Reclamation cut water releases to the legal minimum this year, something it has never done. The other is releasing more water from Flaming Gorge, a reservoir upstream that is in better shape.

As Balken describes it, “This is reservoir triage.”

These emergency actions have serious side-effects. Upstream, Flaming Gorge is expected to lose 35 feet of elevation by next spring, once the extra water has been released. That will hurt the recreation economy of northeastern Utah and southwestern Wyoming – fewer boat ramps in the water, less fishing access.

These upstream releases have limited utility, Wegner said. “You can do that once or twice. But you got to then depend upon Mother Nature refilling those reservoirs upstream.”

Hoover Dam at low water. Jonathan P. Thompson photo.

Downstream, Lake Mead will drop quickly and it too will approach a level in which hydropower generation at Hoover Dam severely drops. Algal blooms in a warmer, shallower lake could be a problem. “They’re going to be robbing Mead to pay Powell,” Balken said.

Trying Not to Hit Bottom

The idea of dead pool – when Lake Powell can no longer release water – was almost inconceivable when the reservoir was designed and filled. The official device for measuring Lake Powell’s elevation ends at the top of the penstocks, at elevation 3,477.5 feet. According to Reclamation’s 2024 technical memo, “This is an indication that reservoir elevations below minimum power pool” – 3,490 feet – “were not anticipated.”

Cavitation at the Glen Canyon Dam, the cause of the emergency in 1983 via Flow Science.

Reclamation finished filling the reservoir in 1980. Three years later, after an intense El Niño winter, the dam’s upper limits were tested. Floodwaters in the summer of 1983 nearly broke the dam. Such volumes are almost inconceivable now.

In a typical year, Lake Powell would be rising in late April, flush with the deposits of snowmelt from headwater basins in the Rocky Mountains. Not this year. The snowpack peaked in many basins in late February or early March. What little snow there was has already melted. As of April 28, Lake Powell inflows are projected to be just 16 percent of average. Lake level forecasts from mid-April showed a long downward slope for the next 12 months. Those projections were what triggered the emergency release of water from Flaming Gorge and the reduction in Lake Powell releases.

Scientists have been warning about circumstances like this for years. In a defining period for the basin, all the predictions of water supply shocks in the Colorado River from the past two decades are coming to pass.

“We should have been prepared for this,” Balken said.

The big, big story this chart tells: “Holy moly,” said the staff at Big Pivots when this slide was shown at the River District meeting in Glenwood Springs — Allen Best (BigPivots.com) #ColoradoRiver #COriver #aridification

Credit: Colorado River District

Click the link to read the article on the Big Pivots website (Allen Best):

April 26, 2026

The staff at the Colorado River District showed this slide during a session on Colorado River hydrology at the district’s board of director meeting in Glenwood Springs this past  Tuesday afternoon.

Here in metro Denver, the staff of Big Pivots said something profound like “holy moly!”

With moisture coming into Colorado during the next two weeks, it’s possible that the runoff into Lake Powell may surpass that of 2002. This slide says that right now, at Cameo, the gaging station on the Colorado River, east of Palisade, it looks like the spring runoff peaked in late March. The usual is in early June.

Another takeaway from the River District meeting was about Green Mountain Reservoir. The dam that creates the reservoir was built from 1938 to 1943, giving the Western Slope a way to store water as part of the Colorado-Big Thompson diversion that came after World War II. The normal allotment of the reservoir storage for downstream irrigators, mostly in the Grand Junction area, is 66,000 acre-feet.

For the first time in the history of Green Mountain, said Andy Mueller, the River District’s general manager, the water is unavailable. Instead, the river district is tapping various pools of water over which it has control to come up with a thimbleful here, a cup there. A creative solution, Mueller called it. Irrigators won’t become whole, but they will get some help.

“We’ll survive, and we will continue to survive,” said Mike Ritschard, a director from the Kremmling area and a fourth-generation rancher there, said during a roundup of reports from board members.

Created in 1937, one of the ramifications of the Colorado-Big Thompson water diversion, the River District has primary responsibility for water matters across 15 of the 20 Western Slope counties.

The Colorado River Water Conservation District spans 15 Western Slope counties. Colorado River District/Courtesy image

Upper #ColoradoRiver states push for mediation on water cuts — Tucson.com #COriver #aridification

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

Click the link to read the article on the Tucson.com website (Tony Davis). Here’s an excerpt:

April 26, 2026

It’s time to bring in a mediator to handle the prolonged dispute over managing the Colorado River between the Upper and Lower Colorado River Basin states, representatives of the four Upper Basin states say.

“The proposal for mediation attempts to address the current deadlock between Upper Basin and Lower Basin approaches and begin to deal with the basin’s dire hydrologic conditions.” said the Upper Colorado River Commission, which represents Colorado, New Mexico, Utah and Wyoming.

“The commissioners believe a structured mediation process can support authentic negotiations and collective action to address the Basin’s operational challenges,”  the commission said in a news release last week.

The request for a mediator to handle this dispute follows about two years of fruitless negotiations among the various state representatives. There have been several major sources of dispute, but the biggest one has been over how the two basins should split the cuts in river water use that would be needed to bring human demand in line with shrinking supply…The Upper Basin states’ request comes not long before the U.S. Bureau of Reclamation is supposed to announce its plan for managing the river, in the absence of an agreement among the basin states. A new plan is necessary because the river’s current operating guidelines expire Sept. 30…

The request for mediation also comes as the river’s condition continues to deteriorate. Hot, dry weather has held down water flows in the river for most of the year, and there’s a risk that spring-summer runoff into Lake Powell will be the lowest on record since Lake Powell started filling in the 1960s.

The Bureau of Reclamation is planning to increase releases in from #FlamingGorge Reservoir while cutting discharges from #LakePowell — Summit Daily #ColoradoRiver #COriver #aridification

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

April 20, 2026

With a historic drought hitting the Colorado River basin, the U.S. Bureau of Reclamation is making preparations to slow releases from the river’s largest reservoir while increasing withdrawals from an Upper Basin reservoir. 

“Given the severity of the risks facing the Colorado River system, it is imperative that we take action quickly to protect a resource that supplies water to 40 million people and supports vital agricultural, hydropower production, tribal, wildlife and recreational uses across the region,” said Andrea Travnice, the Bureau of Reclamation’s assistant secretary of water and science in a Friday, April 17 news release…

As a result, the Bureau of Reclamation is anticipating that inflow to Lake Powell will be 29% of the historical average, which it reports is one of the lowest on record. If water levels fall below a certain elevation — below 3,490 feet or roughly 15% of its capacity — it can impact operations, regional power and water supplies as well as reduce hydroelectric power generation. The Bureau is projecting it could hit this minimum power pool level by August. As of April 19, Lake Powell and Lake Mead were 24% and 32% full, respectively. 

View below Flaming Gorge Dam from the Green River, eastern Utah. Photo credit: USGS

A new reservoir is slowly filling in Northern #Colorado. Its future is still murky — Scott Franz (KUNC.org) #ColoradoRiver #SouthPlatteRiver

Water starts to fill Chimney Hollow Reservoir in Larimer County on Tuesday, April 21. Scott Franz/KUNC

Click the link to read the article on the KUNC website (Scott Franz):

April 22, 2026

At 8 a.m. Tuesday, there was only silence and the occasional crunch of rocks as a dozen people in orange vests waited in a moonlike landscape beneath a 350-foot-tall dam near Loveland.

“Ninetey seconds,” a worker called out.

Moments later, it sounded like a waterfall suddenly roared to life as Northern Water started filling Colorado’s newest reservoir, Chimney Hollow.

“It’s pretty cool, I mean it’s something we’ve been working on for a long time, so just to see it for real, it’s pretty cool,” Chris Manley, a water quality specialist with Northern Water, said as he watched water gush from a 40-foot-tall concrete tower at the bottom of the reservoir.

By the end of the week, the initial release of 1,500-acre feet of water will rise about 30 feet above the spot Manley and a gaggle of journalists were standing on Tuesday morning.

Engineers will make sure the pipes that will funnel Colorado River water to the reservoir are functioning correctly. It will also give Northern Water a chance to study an issue with the water supply.

The reservoir’s future became murky last year after officials announced that naturally occurring uranium was found in the rock used to build the dam for the reservoir.

Manley said the uranium discovery has set the project back roughly a year. But he said it is an issue Northern Water can manage long term.

Water from Chimney Hollow Reservoir is projected to serve almost a million people on the Front Range. Scott Franz/KUNC

“But we’ve got to really understand the situation a lot better before we can move forward,” he said.

This week’s initial fill will provide Northern Water with a real-world test of the water quality that was only previously done in laboratories.

None of the water coming into the reservoir will be released to taps at this point. The reservoir is only being filled to about 2% of its total capacity in the coming days.

“We’ll be measuring it actually pretty frequently, to see just what is (the water) picking up as it goes up and touches the dam and starts to move some of the sediments around here,” Northern Water spokesperson Jeff Stahla said.

Northern Water officials could not provide a timeline for when water will begin reaching the dozen water suppliers who have signed up to receive it.

Map from Northern Water

The reservoir project cost an estimated $500 million and has been in the planning stages for more than two decades.

Conservation groups have raised concerns about the reservoir.

Jen Pelz, wild rivers program director at the conservation group WildEarth Guardians,told KUNC in 2022 that the project would burden a Colorado River water supply that is already overallocated.

“You can have a bunch of buckets, and you can build more buckets to put water on the front range,” Pelz said. “But the reality is, if the projected climate change impacts come to fruition — which all indications are, they’re coming to fruition quicker than we even thought — there’s going to be no water to fill those buckets.”

The reservoir is seeing its initial fill during historic drought conditions in the Colorado River basin.

It also happened a day after Denver Water announced it would drain Antero Reservoir near Fairplay to conserve water this summer and minimize evaporation. 

“It’s definitely very ironic that we’re filling the reservoir in these historic drought conditions, but we’re fortunate that we had a little bit of supply left from last year,” Northern Water Operations Director Jerry Gibbens said. “It really showcases why storage is so important for our region.

Northern Water officials say the reservoir is a way to boost water security on the Front Range.

“As we’ve seen this year, water storage is such a key element of our overall water supply in northern Colorado, and this just adds another increment of that supply to a region where our water demands continue to grow,” Stahla said.

The South Platte River Basin is shaded in yellow. Source: Tom Cech, One World One Water Center, Metropolitan State University of Denver.

The driest year revisited: Five takeaways from 2002 for today’s #ColoradoRiver, experts weigh in on what we learned during the region’s worst #drought on record, and how those lessons might help us this year — Annie MacKeigan (WaterDesk.org) #COriver #aridification

The Colorado River carves through mud left behind from Lake Powell when the reservoir was at full pool, near Hite, Utah in October 2022. (Alexander Heilner/The Water Desk with aerial support from LightHawk)

Click the link to read the article on The Water Desk website (Annie MacKeigan):

April 23, 2026

The Colorado River basin has been here before. 

This year’s historic winter of low snow might feel novel. But recent years give some insight into just how dry the West’s most important river system can get. This season’s scant snowpack is melting rapidly, and turning up memories of other notably dry years. 

Prolonged drought conditions and warming temperatures since 2000 have produced severe single-year droughts in 2002, 2012, 2018 and 2020 in the river’s headwaters states of Colorado, Wyoming and Utah. As severe drought years continue to put the Southwest’s water infrastructure to the test, communities in the region are grappling with how best to understand and adapt to a changing climate. 

2002 stands as the worst drought on record for the Colorado River, measured as the flow into one of its biggest reservoirs, Lake Powell on the Utah-Arizona border. It’s possible 2026 could break that record. Back then the year acted as a wake-up call to the region’s water leaders, spurred important policy changes, and reshaped attitudes around conservation. 

We asked Colorado River experts Eric Kuhn, Jeff Lukas and Jim Lochhead to share five important takeaways from the 2002 drought, and what to know as we enter the warmer, drier months of 2026.  

1. Reservoirs have memory

Reservoirs act as batteries for water availability, charged by inputs such as snowmelt, streams, rivers and precipitation. 

“What you did two or three years ago can affect your water supply now,” said Eric Kuhn, former general manager for the Colorado River Water Conservation District. “So in a good year, if you are conserving, you are actually helping the system out for the next drought.” 

The 2002 drought prompted municipal utilities to rethink their reservoir usage. 

“Water managers and agencies have absorbed several lessons from 2002, including holding something back. They’re operating the reservoirs a little differently,” said Jeff Lukas, an independent climate and water researcher who has lived on Colorado’s Front Range for 40 years. 

By conserving reservoir water, municipal utilities can maintain water storage for less abundant water years of the future. But as dry conditions have dogged the entire Colorado River basin for more than a quarter-century, the system’s buffer is gone. 

“The biggest issue is that Lake Powell and Lake Mead were relatively full in 2002,” Kuhn said. Now, both Lake Powell and Lake Mead are at critically low levels, and the water scarcity is increasing the likelihood of multi-state litigation.

In 2002, drought was dealt with on a local level; water utilities were not thinking about drought in terms of the entire river system, but instead how to regulate municipal water use. This year’s dry conditions are pushing the whole region to the brink. 

2. Conservation can make a big difference, if it is mandatory

Individual contributions to water conservation, adhering to local outdoor watering restrictions for example, can make a difference. Prompted by the 2002 drought, a 2004 University of Colorado study aimed to measure the effectiveness of water restrictions put in place by water providers on the state’s populated Front Range. 

The study followed municipal water providers Thornton, Aurora, Westminster, Fort Collins, Boulder, Louisville, Lafayette and Denver Water, comparing 2002 usage to average water usage in 2000 and 2001. Researchers determined that water restrictions are most effective when mandatory. Mandatory restrictions in Lafayette reduced water usage by as much as 53%, according to the study. 

The same study found that under mandatory restrictions, savings of expected water use per capita was as successful as 56%, while voluntary restrictions only measured up to 12%. 

Outdoor watering represents a big slice of a city’s water budget, and 2002 showed utilities that in times of crisis people can rein in their use. 

“Everyone should realize that they can make a small contribution to the solution,” Kuhn said. “Even though their individual contribution might be miniscule, when you add up all their neighbors and other people, it’s not miniscule. It’s very, very big.” 

Watering a lawn once or twice a week, and not during peak hours, is a practical way to conserve water while keeping grass alive. 

3. This is not a one-off year

It’s easy to shrug off a dry year and hope for wet weather’s return. But the long-term trends are concerning. 

“This is really the 26th year of extreme drought,” said former Denver Water CEO Jim Lochhead. On a larger scale, the seven Colorado River basin states—Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming—have been preparing for worsening drought conditions since the shock of 2002. But river policy hasn’t kept pace with the aridification, leaving the region’s largest reservoirs at near record lows. 

The Colorado River flows through canyons in northern Arizona in October 2020. (Ross Rice/The Water Desk & LightHawk)

“This has been a slow moving train that I think the states have known was coming, and they have frankly failed to do anything about it,” said Lochhead, who also represented the state of Colorado amid interstate Colorado River negotiations in the 1990s and early 2000s.

The Colorado Climate Center anticipates droughts to increase in severity and frequency, a trend that is only expected to continue in Colorado and across the Southwest as warming temperatures upend the water cycle. 

“We should be managing and thinking about water, using water, as though it were always a drought,” Lukas said. 

4. Communities have more practice dealing with drought, but still struggle  

Drought conditions in 2002 led some municipal water utilities to organize and create incentives for conservation, and transformed the urban landscape, swapping grass for more drought-tolerant plants. Those water restrictions allowed municipal water providers to curb water demand while steadily growing in size. However, there is still room for improvement in disproportionately affected communities.  

According to Lochhead, urban areas need to prioritize heat reduction in neighborhoods that have fewer trees in order to lessen the impacts of drought and warming temperatures. Using scarce water supplies to encourage tree-planting and increase shade should remain a priority. 

“I think we need to work with those communities to enhance some landscaping,” Lochhead said. “Whether it’s the homeless population, whether it’s just kids that are out, whatever it may be, those areas are where they’re pretty hard hit by heat.” 

Farmers and ranchers are used to riding the highs and lows of western weather. But extremely dry years like 2002, and now 2026, can push their operations to the limits. 

“This is going to be a really tough year,” Lukas said. “You’re going to have a lot of people selling off their herds and taking insurance out because of low crop yields.”

The majority of Colorado’s annual water supply is used for irrigation, so any proposed restrictions can be costly for the agricultural community. “There are going to be a lot of farms and ranches that just can’t operate because they don’t have any water,” Lochhead said. “There are going to be some significant economic consequences.” 

5. Stay aware, even if things seem bleak 

For Lukas, this year and its predecessors test our expectations about what nature can provide.

Even in periods of prolonged drought, there are wet years. “Judging from history, that tends to put everyone back on their heels, a little complacent,” Lukas said, but maintaining water storage relies on year-to-year vigilance, not complacency.  

Another primary concern during drought years is wildfire. With less moisture in the soil, dry vegetation acts as fuel for wildfire, which becomes harder to contain under hot and dry conditions. 

“I worry a lot less about municipal water supply than I do about wildfire,” Lukas said. Many of Colorado’s notably dry years have also recorded severe and destructive wildfires. 

It comes at no surprise that worsening drought falls in line with worsening wildfires. “Climate change is delivered to people through changes in the hydrologic cycle,” Kuhn said, so being aware of water usage now is just as, if not more important as it was in 2002.

This story was produced and distributed by The Water Desk at the University of Colorado Boulder’s Center for Environmental Journalism.

The Water Cycle. Credit: USGS

Emergency plans for the #ColoradoRiver buy time, not solutions — Caitlin Ochs (High Country News) #COriver #aridification

The Colorado River flows below Glen Canyon Dam in this image from 2021. Photo credit: Caitlin Ochs

Click the link to read the article on the High Country News website (Caitlin Ochs):

April 24, 2026

The federal government ordered Flaming Gorge water released and cuts to Lake Powell releases, to prevent collapse.

Last week, the federal government ordered emergency measures to prevent water levels at Lake Powell from falling so low that Glen Canyon Dam, which created the reservoir, could no longer generate power or deliver water downstream. Without this intervention, models showed that the reservoir could drop below safe operating levels in August, meaning that the river would not have a reliable way to flow past the dam. This would threaten water and power supplies for millions of people across the Southwest, as well as the flow of water through the Grand Canyon.

Westwide SNOTEL basin-filled map April 24, 2026.

Across the Colorado River Basin, an extremely low snowpack combined with a record-shattering March heat wave, have left water managers with few other options. The region’s reservoirs were already depleted from years of relying on wet winters to balance the growing demand with the ongoing drought.

Flaming Gorge Reservoir, on the Green River, straddles the Wyoming-Utah border south of Rock Springs. The Flaming Gorge dam, on the Utah side, was completed in 1964 and is a critical component of the Colorado River water storage system. The Green River, the chief tributary to the Colorado River, originates in the Wind River Range, flows to Flaming Gorge Reservoir, then connects with the Colorado River in Canyonlands National Park in Utah.

The Bureau of Reclamation ordered releases from Flaming Gorge Reservoir, which straddles the Utah-Wyoming border, to bolster Lake Powell’s water levels. At the same time, the amount of water delivered from Powell to downstream users will be significantly reduced.

“This is a short-term solution,” said Jenny Dumas, water attorney for the Jicarilla Apache Nation, which sits near the border of Colorado and New Mexico. “It’s going to take time to recover these reservoirs before we can do this again. So while we can exhaust our reserves to avoid system collapse this year, it means reserves won’t be there next year.”

This is not the first time water managers have turned to Flaming Gorge to stabilize the larger river system. In 2022, the federal government ordered the reservoir to release 550,000 acre-feet to stabilize the downstream river system, which disrupted recreation and rattled upstream communities. This time, Reclamation has authorized releases of up to 1 million acre-feet. Over the next year, a third of the reservoir’s storage is expected to be gradually released. By September, water levels are projected to drop about 12 feet.

Flaming Gorge Reservoir stores water from the Green River in Wyoming, and is shared by Wyoming and Utah. Ted Wood/The Water Desk

“This is an unprecedented release volume — more than double the last time,” said Amy Haas, executive director of the Colorado River Authority of Utah, who briefed communities bracing for the releases at Flaming Gorge Reservoir. “We really just don’t know the actual impacts of these releases to surrounding communities, and our water users are struggling. My goodness, we are on target to become one of the worst water years on record. The forecasts are stunning to all of us.

The amount of water projected to flow into the river from snowmelt is rapidly declining. Over the first two weeks of April, forecasts for Lake Powell fell by 500,000 acre-feet. The spring forecast is shifting so quickly, some experts believe the releases from Flaming Gorge may need to increase.

“I think it’s a target, and they’re going to have to revise it,” said veteran water manager and researcher Eric Kuhn, who co-authored a paper last September predicting this kind of shortage and calling for action. “It’s many river miles from Flaming Gorge to Lake Powell. What are the transit losses?”

“Also, when March looked like June, what are June and July going to look like?” he added. “I could easily see that 1 million becomes 1.5 million acre-feet by March of 2027.”

Kuhn sees the emergency actions as a sign of broader failure to address the underlying issues that led to the current situation. “The Department of Interior no longer acknowledges that the fundamental problem is climate change. We’re dealing with the symptoms of the disease. We’re not dealing with the underlying problem,” he said. “The law of the river was written for a river that no longer exists from a hydrologic standpoint.”

In a meeting Tuesday, Upper Basin state commissioners acknowledged the need for emergency action but warned that this was not a long-term solution. 

“I want to make darn sure people understand … the incredibly difficult, heartbreaking decisions that are having to be made with the lives of generations of cattle production, and farming communities in the Upper Basin states,” particularly in Utah, said Gene Shawcroft, Utah’s Colorado River commissioner.

Wyoming Commissioner Brandon Gebhardt reported that 13,000 acres of agricultural land in the South Piney drainage on the eastern slopes of the Wyoming Range had been cut off from water, adding that even some of the state’s oldest and most senior water rights — some dating to 1898 — will likely be impacted. 

“We expect three of the five Flaming Gorge boat ramps in Wyoming will be rendered unusable, and low reservoir levels will have long-lasting negative impacts on reservoir fisheries,” said Gebhardt. “We recognize what we are approving today will have significant negative impacts on our water resources, local economies and recreation.”

Map of the San Juan River, a tributary of the Colorado River, in Arizona, Colorado, New Mexico and Utah, USA. Made using USGS National Map data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=47456307

Shortage is affecting more than agriculture and recreation. The Ute Mountain Ute Tribe, for example, reported its sacred springs going dry, affecting ceremonies, and the tribal farm will have to operate with just 14% of its normal water supply. Meanwhile, the Jicarilla Apache Nation said it received just 25% to 35% of its contracted water allocation, leaving tribal leaders uncertain about whether they can divert enough water from the Navajo River to meet the community’s domestic needs.

With no sign of long-term agreement on how to manage the river past September, legal tensions among the basin states remain high.

Arizona’s Department of Water Resources released a statement agreeing with plans to order upstream releases to stabilize Lake Powell but also warning that the revised downstream releases were “substantially less than required under the 1922 Colorado River Compact,” referencing the foundational legal document dividing the river. “Failure to comply,” the release stated, “is itself a serious development that Arizona will assess and respond to accordingly.”

Upper Basin state commissioners plan to hold a special meeting to revisit the issue and vote on whether to continue emergency actions past August after assessing water levels and determining whether or not the releases are working.

Regardless of the possible legal battles, the reduced water in the river, infrastructure limits and political gridlock have left basin communities feeling uncertain about their future water security. After the planned releases from Flaming Gorge, if next winter brings another dry year, it is unlikely that upstream reservoirs will have enough water to stabilize Lake Powell.

The basin needs more than emergency actions, Dumas said. “We really want to emphasize the need for serious and permanent changes in how we use and manage the river to adjust to current and future hydrology.”

This story was produced by High Country News, in partnership with The Water Deskat the University of Colorado Boulder’s Center for Environmental Journalism. 

Although cloud seeding couldn’t save #Colorado from a historically bad #snowpack, the dry winter sparked more interest in it — Sky-Hi News

A cloud seeding generator is located in Grand Mesa. The Colorado Water Conservation Board administers the state’s weather modification program, which permits cloud seeding operations. Colorado Water Conservation Board/Courtesy photo

Click the link to read the article on the Sky-Hi News website (Ryan Spencer). Here’s an excerpt:

April 21, 2026

At least nine states conduct cloud seeding operations, including California, Nevada, Idaho, Utah, Wyoming, New Mexico, Texas and North Dakota

Colorado’s weather modification program is seeing an increased interest in cloud-seeding technology after the record-low snowpack this past winter. In the past couple of weeks, Weather Modification Program Manager Andrew Rickert said he’s received inquiries from two major ski resorts hoping to learn more about cloud seeding, which can increase the amount of snowfall a storm drops…

The Colorado Water Conservation Board administers the state’s weather-modification program, which issues permits to contractors who operate seven permitted winter cloud-seeding projects, all of which are located on the Western Slope…Rickert said he believes that dry years like this “are one of the reasons why we need to look into cloud seeding as a measure to get more snow, to get more moisture out of a system.” But he noted that the technology can only do so much when natural snowfall is low.

“Cloud seeding can’t create storms,” he said. “We need storms to be present with the right characteristics — wind speed, wind direction and the presence of super-cooled liquid water — and when all those things are there, then we can seed the storm to get a little bit more out of it.”

The ability of cloud seeding to add to Colorado’s snowpack was limited this year compared to past years due in large part to the lack of suitable storms that rolled through the state, Rickert said. He noted, however, that the technology still likely added small amounts of extra precipitation to the storms it did seed. In Colorado, he said all seven wintertime cloud-seeding programs use ground-based generator systems and operate from Nov. 1 to April 15, with contractors able to get an extension to the end of April if conditions allow…Two of the state’s cloud seeding projects — the Central Colorado Mountains River Basins project, which targets the region from about Winter Park to Aspen, and the San Juan Mountains project — are run by Western Weather Consultants, a Durango-based company. Western Weather Consultants Lead Forecaster and Assistant Manager Mike Hjermstad said that the regions where both of those projects operate saw far fewer storms suitable for cloud seeding this year.  In the central mountains, where there are usually 30 to 40 storms that are suitable for cloud seeding, there were only 20 this season, Hjermstad said. In the San Juan Mountains, there were even fewer storms that were suitable to be seeded. Only about 12 storms rolled through all winter long that could be seeded, he said.

Cloud-seeding graphic via Science Matters

Severe #ColoradoRiver #drought leads to water releases from Upper Basin reservoirs and reduced flows from #LakePowell — #Aspen Public Radio #COriver #aridification

Illustration from the report, “Antique Plumbing & Leadership Postponed” from the Utah Rivers Council,
Glen Canyon Institute and the Great Basin Water Network. Courtesy of Utah Rivers Council

Click the link to read the article on the Aspen Public Radio website (Caroline Llanes). Here’s an excerpt:

April 21, 2026

The agency announced on April 17 that it would release between 600-thousand and one million acre feet of water from Flaming Gorge Reservoir on the Wyoming-Utah state line over the course of the next year. In addition, Reclamation will reduce the amount of water it sends from Lake Powell through Glen Canyon Dam, decreasing flows downstream through the Grand Canyon and into Lake Mead. Through September 2026, the agency will reduce its annual release volume from about 7.5 million acre feet of water to just 6 million acre feet.

Westwide SNOTEL basin-filled map April 23, 2026.

The drought contingency actions come in response to a water year that has been incredibly dire for the Western United States and the Colorado River Basin. Snowpack has been at record lows for much of the winter, which is bad news for a region that relies on snowmelt for much of its water use. The forecast for runoff into Lake Powell from the entire Upper Basin is forecast to be just 23% of normal. The agency estimates that these combined actions will boost Lake Powell’s elevation by 54 feet over the course of the year, bringing it to 3,500 feet in April 2027. Currently, Lake Powell’s elevation is about 3,528 feet. 3,490 feet is the elevation at which hydropower can no longer be produced at Glen Canyon Dam. Any lower, and water will not be able to enter the hydroelectric turbines. Instead, the water has to go through what’s called “river outlet works,” which are tunnels that bypass the turbines to get the water downstream to the Colorado River.

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

Seth Arens, a hydrologist at the Western Water Assessment, said Glen Canyon Dam was not designed to have the river outlet works as the primary way to get water out of the reservoir.

“When the Bureau of Reclamation has used those river outlet tubes, most of the times they’ve used them, there’ve been some damage to those tubes,” he said. “They’ve had to repair damages after relatively short uses, you know, a scale of weeks dumping water out of those.”

Environmental attorney Chris Winter said it’s clear Reclamation has to take emergency actions to protect its own infrastructure. But, he said the plan leaves a lot of uncertainty and unanswered questions.

“We’re not going to be able to release a whole bunch of water from Flaming Gorge Reservoir (next year) because that water will have been released this year, and it’s not going to refill if we get another dry year,” he said. “Releases of water from Upper Basin storage units, that’s like a one-time thing, unless we happen to get some wet years in the future.”

View below Flaming Gorge Dam from the Green River, eastern Utah. Photo credit: USGS

Flaming Gorge is currently about 82% full. Reclamation estimates that its plan will bring the reservoir down to about 59% of its full capacity over the next year. Other Upper Basin reservoirs are not part of the plan at the moment, due to poor forecasted inflows and low water levels. Blue Mesa Reservoir in Western Colorado is currently 47% full and Navajo Lake on the Colorado-New Mexico state line is 63% full. Winter said reducing flows out of Glen Canyon Dam could also lead to legal issues. The Upper Basin states of Colorado, Utah, Wyoming, and New Mexico have not reached a deal with the Lower Basin states of Arizona, California, and Nevada on how to allocate water—and take cuts to usage in the midst of a changing climate—over the next 20 years. On top of that, reducing flows this year would mark a fulcrum point: the first year that the amount of water at Lees Ferry, just below Glen Canyon Dam, falls below the averages set by the Colorado River Compact of 1922.

April 20, 2026, water supply and water use update for Denver Water’s system — DenverWater.org #snowpack #runoff

Click the link to read the article on the Denver Water website:

April 20, 2026

Denver Water’s collection and service areas continue to face severe drought conditions, with historically low snowpack. Denver Water depends on mountain snowpack for its water supply, which serves 1.5 million people in Denver and surrounding suburbs.

As a result, on March 25, 2026, the Denver Board of Water Commissioners declared a Stage 1 drought, seeking a 20% reduction in water use to preserve water levels and avoid even stricter mandatory restrictions later this summer. On April 8, 2026, the board approved the implementation of temporary drought pricing, starting with May water use and reflected in June bills, to signal the premium value of water during droughts and help incentivize customers to save water.

Customers are urged not to turn on automatic sprinkler systems until at least mid- to late-May, or later if possible. It is not necessary to water grass two days per week in April and the beginning of May; keeping automatic systems off will help save water. Occasional hand-watering may be necessary for trees and shrubs during this time. Keep an eye on the weather and let Mother Nature do the watering when she delivers spring rains.


Denver Water’s entire collection system. Image credit: Denver Water.

Snowpack and water supply update

  • Comment from Nathan Elder, Denver Water’s manager of water supply:

“The snow we saw last week brought marginal improvement to snowpack, but it’s still the worst on record, which is doubly concerning as this week is typically our spring peak when the snow levels are the highest. We need our customers to reduce their water use by 20% and help stretch the water we have stored in our reservoirs. Hopefully, working together, we can save water across our service area and avoid increasing restrictions later this summer.” 

  • In Denver Water’s collection system, snowpack as of April 20, 2026, remained at the lowest levels observed in the past 40 years:
    • Colorado River Basin: 36% of normal, worst on record. 
    • South Platte River Basin: 7% of normal, worst on record.
  • Snowpack and melting conditions are unprecedented, with accelerated melting seen since mid-March. Customers need to save water to protect the supply we have right now.
  • Streamflow forecasts are calling for runoff levels to be 10-40% of normal in 2026.
  • Reservoir storage conditions are below average; while in reasonably good shape for the time being, far less snowpack is available to help refill them. As of April 20, 2026, reservoirs were 80% full, versus an average of 85% full for this time.

Water use and conservation update

  • Customers can do their part by making water-efficient upgrades, inside and outside, including rethinking their yards. These steps preserve water supplies and create more adaptable and drought-resilient landscapes that fit naturally into our climate. Read on TAP: Simple strategies to save water at home.
  • Customers are urged not to turn on automatic sprinkler systems until at least mid- to late-May, or later if possible. When watering season begins, Denver Water will require customers in single-family residential properties to limit watering to no more than two days per week on a set schedule based on their address.
    • Addresses ending in even numbers: Sunday and Thursday.
    • Addresses ending in odd numbers: Wednesday and Saturday.
    • All other customers, including multifamily properties, commercial properties, homeowners associations and government properties, may water only on Tuesdays and Fridays.
  • In addition, customers will be required to follow Denver Water’s annual summer watering rules:
    • Water only during cooler times of the day, between 6 p.m. and 10 a.m.
    • Do not allow water to pool in gutters, streets and alleys.
    • Do not waste water by letting it spray on concrete and asphalt.
    • Repair leaking sprinkler systems within 10 days.
    • Do not irrigate while it is raining or during high winds.
    • Use a hose nozzle with a shut-off valve when washing your car.

For its part, Denver Water has proactively reduced its spending, taking steps that include enacting a hiring freeze and reviewing maintenance and other projects to see which ones could be deferred. We are also looking into other ways to increase supply by activating agreements that allow us to capture additional water that is typically unavailable during normal conditions.

This year marks the fifth time since 2000 that Denver Water has issued a Stage 1 drought, and the first since 2013. Prior to 2013, the board declared a Stage 1 drought in 2002, 2003 and 2004.

Denver Water has many resources for homeowners looking for inspiration and information about landscapes that fit naturally into our dry climate. Click here for conservation and efficiency tips for outdoor irrigation and to get more details on ways to ColoradoScape  your property, including through rebates for turf removal and a DIY guide for landscape changes, among many other potential water-saving steps.

Updates about Denver Water’s reservoir levels, customer water use and snowpack can be found in the Water Watch Report, which is updated weekly in the spring and summer.

This chart shows the cumulative snowpack on April 20, 2026, in the area of the Colorado River Basin where Denver Water captures its water supply. The snowpack is 36% of normal, which ranks as the lowest on record for April 20. Image credit: Denver Water.
This chart shows the cumulative snowpack on April 20, 2026, in the area of the South Platte River Basin where Denver Water captures its water supply. The snowpack is 7% of normal, which ranks as the lowest on record for April 20. Image credit: Denver Water.

New Mexico’s Time-Honored Irrigation Canals Face Existential Threat: As the #RioGrande dries out months early, water managers look to blessings, prayers and groundwater to save the acequias — Tina Deines (InsideClimateNews.org)

Community members participate in a blessing ceremony of the Atrisco Acequia Madre in Albuquerque, N.M. Credit: Tina Deines/Inside Climate News

Click the link to read the article on the Inside Climate News website (Tina Deines):

April 21, 2026

As the Rio Grande dries out months early, water managers look to blessings, prayers and groundwater to save the acequias that have spread water, history and culture to farmers and families since the 16th century.

On a sunny spring morning at the end of March, a woman raised her little girl above an irrigation ditch that runs just west of the Rio Grande in Albuquerque’s South Valley. The toddler, with a braided head piece crowning her long, brown hair and artificial flowers around her neck, enthusiastically tossed an assortment of colored petals into the water below as a small crowd cheered. 

It was part of a blessing ceremony at the headwaters of the Atrisco Acequia Madre (Atrisco Mother Ditch)—considered to be the oldest and most important of these irrigation canals in the area—during “Primera Agua,” an annual celebration that commemorates the first water flow of the season.

The day, sponsored by the Center for Social Sustainable Systems (CESSOS), a local advocacy group, was filled with traditional dances, songs, chants, blessings and speeches about community. But it also included acknowledgments of the water challenges that New Mexico faces. 

New Mexico snowpack April 23, 2026.

This year, New Mexicans are confronting record-low snowpack, which is essential for supplying an even flow of water into acequia systems. Record heat isn’t helping, as it accelerates evaporation throughout New Mexico waterways and has contributed to an early melt off of the already thin snowpack. 

At the March 29 Primera Agua event, temperatures were 14 degrees Fahrenheit above average in Albuquerque, and about a week earlier, the city set a record for the earliest 90-degree day of the year. Like much of the West, the city also experienced its warmest winter on record. 

“Every year seems like it’s a new bar in terms of the record low,” Paul Tashjian, director of freshwater conservation for Audubon Southwest, said of the low water levels that were already hitting the state in late March. “But this year is almost like that on steroids…It’s not a pretty picture.”

Santiago Maestas, president of the South Valley Regional Association of Acequias, stands next to the Pajarito acequia in Albuquerque, New Mexico. Visual: Lourdes Medrano for Undark

“It’s in Your Blood”

New Mexico’s acequias date back to the late 16th century, when the Spanish colonized the region. By 1700, what would become New Mexico had around 60 of these community-managed irrigation ditches. Today, there are more than 700 active acequias in the state, many of them concentrated in Northern New Mexico.

The man-made, gravity-fed earthen canals transport snowmelt and river water to fields for flood irrigation. They each have a governing body called a “mayordomo” or “ditch boss” and elected commissioners who oversee maintenance, water distribution and conflict resolution. 

Some areas have seen traditional acequias absorbed into larger water conservancy districts. The Middle Rio Grande Conservancy District (MRGCD), for instance, covers a 150-mile stretch of the Rio Grande from Cochiti to Bosque del Apache. Here, MRGCD diverts water from the river to the agency’s irrigation system, which delivers it to acequia headgates, where local groups take over.

Most acequias across the state, however, still operate as individual political subdivisions.

Dawn Nieto Gouy grew up in Albuquerque’s historic Los Duranes, a neighborhood where acequias such as the Duranes Lateral run alongside homes and agricultural fields.

“It’s in your blood. It’s in your soul,” Nieto Gouy said, describing the cultural significance of these waterways. She recalled playing with her best friend alongside an acequia near her home as a child. 

“It was like I would spend almost a lifetime in a day getting from our house to the end, meeting at the acequia, running around barefoot and playing and bathing, doing whatever we did there,” she said. “And then the days would just run away from us.”

Despite their long history and cultural importance, acequias—and the people who depend on them—face an urgent threat from climate change. This year, New Mexico’s snowpack hit historic lows in early spring, dropping to around 20 percent of normal as of April 20. That record-low snow collided with warmer-than-usual temperatures—the state experienced its hottest March in recorded history, surpassing the old record by 4.4 degrees Fahrenheit—to produce this outcome. 

People cross a bridge over the Atrisco Acequia Madre during the Primera Agua event in Albuquerque. Credit: Tina Deines/Inside Climate News

In Northern New Mexico, water rights holders—known as parciantes—expressed concern that the meager snowpack wouldn’t sustain the many acequias that weave through the region. One Santa Fe New Mexican reportdescribed the dire situation in the village of Truchas, where acequias were already running low at the start of the irrigation season.

Further south, MRGCD announced in late March that there may not be enough water this year to meet the needs of its 11,000 irrigators, including acequia parciantes. And as of March 27, the Rio Grande showed early signs of drying at the San Acacia reach, an area that typically begins to diminish in early summer. 

“Historically, we used to talk about May as being a very early time to see that happen,” said Anne Marken, river operations manager for MRGCD, which oversees irrigation, drainage and river control for around 60,000-70,000 acres of farmland. “Last year it happened in April and we were all very shocked by that, but this year it happened in March.”

Praying for Rain

During times of water scarcity, acequia communities have long relied on sharing practices. Users may be assigned specific days or hours when they can access water, for instance. Similarly, MRGCD utilizes rotating water deliveries within its district—delivering water to different irrigators at different times, depending on availability—and is implementing that management strategy this year. 

“Water users are strongly encouraged to take water when it is available, future opportunities may be uncertain,” the agency said in a press release.

Other than that, water managers and acequia parciantes across the state are praying for rain to help replenish the system and water fields.

“There’s not a ton of tools in our toolbox right now from a water management perspective,” Marken conceded, explaining her department is currently working in a run-of-the-river system, meaning that the only available water is what is in the river. 

Map of the Rio Grande watershed. Graphic credit: WikiMedia

#LakePowell will get a short-term boost amid #ColoradoRiver #drought — Alex Hager (KJZZ.org) #COriver #aridification

Glen Canyon Dam. Photo credit: Robert Marcos

Click the link to read the article on the KJZZ website (Alex Hager). Here’s an excerpt:

April 21, 2026

The nation’s second-largest reservoir will get a boost to keep water levels from dropping too low, but the fix won’t last long…The Bureau of Reclamation will take water from Flaming Gorge Reservoir in Utah and Wyoming and send it downstream to Lake Powell. The agency, which manages major dams and reservoirs across the Western U.S., will also ratchet back the amount of water released from Lake Powell. The efforts are mainly focused at keeping Glen Canyon Dam running smoothly. If water levels drop much further, Lake Powell’s surface will fall below the intakes that pull water into hydropower generators within the dam…Water levels had been forecast to drop below the hydropower intakes level as soon as this summer…

Illustration from the report, “Antique Plumbing & Leadership Postponed” from the Utah Rivers Council,
Glen Canyon Institute and the Great Basin Water Network. Courtesy of Utah Rivers Council

Reclamation’s plan will likely stave off catastrophe at Glen Canyon Dam, but it will do little to solve the problem that imperiled it in the first place. Climate change has left the river with less supply, and humans have not been able to adequately rein in demand.

“This action that’s being taken is a band-aid solution for a gaping wound,” said Eric Balken, executive director of the nonprofit Glen Canyon Institute. “It’s a short-term measure that does not get at the root of the problem, which is over consumption of water.”

Colorado River Basin via Rand JIE

#ColoradoRiver water release is a ‘Band-Aid on a gaping wound’ with negotiations stalled — KJZZ.org #COriver #aridification

The Grand Canyon survey party at Lees Ferry. Left to right: Leigh Lint, boatman; H.E. Blake, boatman; Frank Word, cook; C.H. Birdseye, expedition leader; R.C. Moore, geologist; R.W. Burchard, topographer; E.C. LaRue, hydraulic engineer; Lewis Freeman, boatman, and Emery Kolb, head boatman. Boatman Leigh Lint, “a beefy athlete who could tear the rowlocks off a boat…absolutely fearless,” later went to college and became an engineer for the USGS. The Grand Canyon survey party at Lees Ferry in 1923. (Public domain.)

Click the link to read the article on the KJZZ website (Lauren GilgerAlex Hager). Here’s an excerpt:

April 21, 2026

It’s been a record dry winter across the West — and it’s making an already bad situation on the Colorado River even worse. If water levels get any lower, Lake Powell and the dam that holds it back could be in dire straits. So now, the federal government is stepping in to prop up water levels. But, as KJZZ’s Alex Hager reports, it could be a Band-Aid solution to a much bigger problem. Hager joined The Show to explain.

LAUREN GILGER: Good to have you. So, what’s the situation on Lake Powell right now after this really dry winter? Kind of a worst-case scenario almost.

ALEX HAGER: Well, right now water levels there are forecast to drop to dangerously low levels as soon as this summer. And when I say dangerous, that means we would start to see some of the infrastructure in Glen Canyon Dam, which is up in Page, Arizona, start to fail. So water levels are on track right now to drop below the intakes for the hydropower turbines that sit inside the dam. That means it would become difficult or impossible to spin them and make electricity for 5 million people across seven states. If water drops a little bit further than that, it might not be able to pass through the dam at all. We are already looking at — you know, if it falls below that hydropower intake, it could only travel through this little-used set of backup pipes. We don’t know that it could carry enough water through. You start to have all of these problems. So we are seeing some actions to prevent that from happening now.

LAUREN GILGER: OK. So tell us about those actions. This is the federal government sort of taking control of at least this aspect of it. What are they going to do?

ALEX HAGER: That’s right. The federal government is stepping in. It is kicking into action something of an emergency backup plan. It’s been done before, but it is definitely a backup plan. And they’re going to shuffle some water around. There is another big reservoir up in Utah and Wyoming called Flaming Gorge, and they’re going to release extra water from Flaming Gorge, send it down the Colorado River to help fill up Lake Powell. At the same time, they’re going to start tightening the tap on Lake Powell, meaning that less water comes out of it. That water will — less of it will flow into the Grand Canyon downstream to Lake Mead and downstream to us.

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

Romancing the River: The Era of Conquest 3 — George Sibley (SibleysRivers.com) #ColoradoRiver #COriver #aridification

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

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

April 21, 2026

A bad year in the Colorado River Basin – barring a truly miraculous spring, probably the worst in recorded history. It is bad enough so the Bureau may have to stop creating power from the Glen Canyon powerplant by this coming fall. At that point, the only way to get water downriver from Glen Canyon Dam will be dribbling it through four outlet tubes that the Bureau is now wishing it had built differently (better) 65 years ago. And praying for enough precip to push the level back above the danger point for the turbines.

Meanwhile the negotiations between the seven basin states about the future distribution of the water remained at an impasse. One might think that a really bad year might generate some new thinking, but the two Basins are still debating Compact numbers like 7.5 million acre-feet for the Lower Basin with a river that might produce less than 5 maf this year, and maybe not much more than that more frequently in the future.

It should be obvious by now that any further negotiation between the states needs to have an independent facilitator guiding the discussion, pushing both factions to disassemble their own non-negotiables. A hard-ass facilitator speaking on behalf of river reality. [ed. emphasis mine]

It seems likely that we will go into the 2027 water year this fall with some new ‘interim plan’ for operating the river system for the water year that begins in October – probably some mix-and-match from the Bureau’s five alternatives proposed last year and ‘EISed’ while the seven states fiddled. The real purpose of the new interim plan will be to keep the infrastructure of the river system viable – dancing with the dead pool. This will probably impose serious delivery shortages on those below the Powell and Mead Reservoirs (meaning the Lower Basin), and also drop the Upper Basin’s rolling 10-year total closer to the 75 million acre-feet (maf) that will cause the ‘compact call’ threat to rear its ugly head.

Year-to-year might be the most honest approach now, anyway, getting a habit of feeling our way forward carefully, with our eyes wide open – woke, one might say.  The managerial ‘need for certainty’ in projections may not be part of the future we’ve imposed on ourselves.

But that’s a good place to let the present sit and settle, and go back to the unfolding saga of the ‘Era of Conquest’ in this update of Fred Dellenbaugh’s Romance of the Colorado River. You may remember that in the last post here, I related that the Bureau of Reclamation, feeling much loved for the Boulder Canyon Project that watered, fed and powered a massive regional development in Southern California, came out of World War II ready to do the same for the Compact’s Upper Basin, in response to a mandate in the Boulder Canyon Project Act that a plan be developed for the development of the rest of the river.

There was, however, already quite a lot of development going on in the Upper Basin – at least in the state of Colorado, beginning in the 1930s, simultaneous with the Boulder Canyon Project.

Udall/Overpeck 4-panel Figure Colorado River temperature/precipitation/natural flows with trend. Lake Mead and Lake Powell storage. Updated through Water Year 2025. Note the tiny points on the annual data so that you can flyspeck the individual years. Credit: Brad Udall

To establish context – the whole Colorado River Basin was experiencing its first serious modern-times drought, even as the Great Depression was settling over the whole nation. After the ‘pluvial’ of water abundance in the first three decades of the 20th century, which convinced the water mavens that the river would deliver a dependable-enough flow of nearly 18 maf, the basin experienced its first 5 maf flow in 1933; by the end of the 1930s, there was reason to doubt that the river would ever again average 18 maf.

But Colorado had a special problem to resolve about Colorado River water distribution: the transdivide situation. I will not bore you again with my opinion of the imperial arrogance in randomly laying down straight line state boundaries in a region of great geographic and geological diversity. But what this created in the irrelevant rectangle called Colorado was like a blanket laid over a fence – the fence being the Continental Divide. West of the Divide, precipitation that fell (mostly snow in the winter) all ran off toward the Pacific Ocean in the Colorado River tributaries. East of the Divide, it all ran off toward the Atlantic in the Platte, Arkansas and Rio Grande Rivers. Because the weather mostly rode in on the prevailing westerlies, considerably more precipitation fell on the West Slope than fell on the East Slope. But the vagaries of cultural and economic development put most of the population and economic growth on the East Slope – ‘80 percent-20 percent’ is the rough ratio frequently used to describe the imbalance between water and population in the blanket dropped over the fence.

The distribution of water on both sides of the ‘blanket’ was governed by the appropriation doctrine as stated in the Colorado Constitution: all the water in the state belongs to the people of the state, subject to appropriation for individual use, and the right to divert ‘shall never be denied’ – with seniority among users determining the right to use the water in times of shortage. And by the turn of the century, challenges in water court had established the right to divert water from one basin to another.

As the drought of the 1930s settled in, farmers on the East Slope began to experience serious pressures on the water supply. And consistent with the optimism and technological advances of the early 20th century, this was not regarded as a fact of life to be acknowledged and adapted to, but as a problem to be addressed – in this situation, by moving water from the West Slope. A major task – but Franklin Roosevelt’s ‘New Deal’ efforts to alleviate the Great Depression offered the possibility of some help, through new agencies like the Reconstruction Finance Corporation and the Public Works Administration.

So when the Colorado General Assembly gathered early in 1933, two water project bills were in the hopper: one to divert an unspecified quantity from the Upper Colorado River in the Grand Lake area to the South Platte River basin, and one to divert an unspecified quantity from the Gunnison River to the Arkansas River basin.

Inhabitants of the West Slope, however, knew nothing about this until they read about it in the newspapers. And they were even more surprised that summer when construction actually began on two transdivide projects: the Denver Water Board began constructing a system of small canals high in the Fraser River headwaters (Upper Colorado tributary) to bring water to the Moffat railroad tunnel pilot bore, which the Water Board had leased from the railroad – an unused but already dug ‘pipe’ to the northern Denver area. And the sugar-beet industry led by Great Western Sugar was doing the same collection system in the headwaters of the Roaring Fork River above Aspen for diversion into a small tunnel to the Arkansas River basin. Both of those enterprises were self-funded.

All of this precipitated a regional West Slope meeting in Grand Junction of ‘water people’ – county commissioners and attorneys who were also all ranchers or farmers – at which a ‘Western Colorado Protective Association’ (WCPA) was formed, and a letter was drafted to the state engineer expressing concern that the proposed and in-process projects threatened the future development of the West Slope, and requesting inclusion in all future discussion of them.

The situation as the West Slope people saw it was not a ‘water grab.’ The leadership in the WCPA knew that the East Slope irrigators and city-builders were exercising a constitutional right in appropriating ‘the people’s water’ on the West Slope. They also knew that most of the Colorado River water left the state’s West Slope in an unmanageable snowmelt flood anyway, and it might as well go through a tunnel to the Front Range as through Grand Junction and on to – well, soon, on to enviable storage behind the great dam being built far downstream rather than its historical destiny of flowing on into the salty sea unused.

Storage! That was the key to the West Slope’s chief water problem, which was water available throughout the growing season for finishing as well as starting crops. West Slope engineers had been drafting up a number of reservoir-and-irrigation projects to present to the Bureau of Reclamation, but dams are expensive, and all of the proposed reservoirs served mountain-valley populations too small to pass the Bureau’s cost-benefit analyses.

So the concept of ‘compensatory storage’ for water lost through transdivide diversions became the WCPA’s central focus. And despite their small population, the WCPA had two good cards to play. One was the fact that New Deal federal funding distributed to the states had to be for projects approved by the entire state; the transdivide diversions that needed federal assistance needed for the basin of origin to be as happy as the basin of destination.

A image shows a guest column by Rep. Edward Taylor that appeared from the Steamboat Pilot in 1921. Graphic credit: Northern Water

The other card was a congressional representative, Edward Taylor, whom they had returned to Congress for 12 terms by 1933, and who had over that quarter-century ascended to chairmanship of the subcommittee that controlled the Interior Department budget in the powerful House Appropriation Committee. Congressman Taylor launched the WCPA’s ‘defensive offensive’ by saying that any project seeking federal assistance for a transdivide diversion would have to provide, as part of their project, an acre-foot of compensatory storage for the West Slope for every acre-foot to be diverted.

That was a large and very expensive demand. Taylor exempted Denver and its Moffat project from the mandate – because, he said, we all want to see ‘our capital city’ grow unrestricted. More likely, he knew that Denver could fund its own project and would at best just ignore him; he was not their congressman, and the Denver Water Board at that point was coming under the domination by their attorney, Glenn Saunders, a city-builder who envisioned a water supply for a ‘thousand-year city,’ most of which he thought would have to come from the West Slope. He just wanted the hicks to stay out of his way. (Not an exaggeration at all.)

Taylor could, however, impose his acre-foot-for-every-acre-foot demand on those seeking federal Public Works Administration funds or Bureau of Reclamation assistance. And that set up what is really an interesting story of people working out difficult problems they’ve imposed on themselves in draping a blanket over a fence and calling it a state, then adopting a wide-open appropriations doctrine for the distribution of a limited resource statewide. It’s a story with many moving parts that we don’t really have time for here in depth; I will note, however, that the whole story is told in my Water Wranglers book, the story of the development of Colorado’s share of the Colorado River. (Out of print, but copies supposedly in all Colorado libraries.)

The principal players in the story were the Western Colorado Protective Association (WCPA), led by Frank Delaney, a lawyer-rancher, and D.W. Aupperle, a Grand Junction lawyer and fruit grower; the South Platte Water Users Association (SPWUA), led by Charles Hansen, a newspaper editor in farm country and a couple lawyer-farmers; and of course the Bureau which wanted to do a big transdivide diversion to the South Platte River. And what turned out to be the ‘wild card,’ Congressman Taylor.

A seemingly endless series of meetings began between the WCPA and the SPWUA with the Bureau in attendance. There was fundamental agreement that, first, the East Slope had legal right to appropriate West Slope water, and second, that the East Slope owed the West Slope some compensation for diverting part of the West Slope’s base for future development. The challenge was arriving at the amount of compensation. The SPWUA wanted to divert more than 300,000 acre-feet from the Colorado River, for what became the Colorado-Big Thompson Project, but they did not see how (even if they could get some New Deal PWA financing) they could afford to also create that much West Slope storage. But the WCPA felt bound to support their congressman – without whom they really had no card to keep them in the game. Frustration and ire grew on both sides – compounded by having to travel back and forth either on the slow trains or drive on roads that were really ‘country’ (a major West Slope chronic complaint).

Finally, in the spring of 1936, Frank Delaney of the WCPA suggested a compromise. If the Bureau and SPWUA wanted to rush into construction, it would have to be Taylor’s acre-foot-for-an-acre-foot mandate. But if they could delay their project until the Bureau did a thorough study of what the loss of 300,000 af of free-flowing water (most of it annually leaving the state unused anyway) would be to the West Slope, and how much storage would actually compensate the West Slope users for that loss of spring runoff, the West Slope would accept that number (and work on getting Cong. Taylor to accept it).

The ‘Delaney Resolution’ broke the stalemate. The Bureau men spent months poring over existing rights and land maps (long before computers and spreadsheets), and came up with a need for 152,000 acre-feet of compensatory storage: 52,000 af to make sure that the Shoshone power plant water right above Glenwood Springs could be met year round (which would also ensure enough late season water for the Grand Valley farms and orchards), and 100,000 af for future irrigation and domestic water development.

That cut Taylor’s demand in two – and the Bureau planned to add a powerplant to the dam that would significantly reduce what the SPWUA would have to pay back. During this period, Taylor – an old man – was actually too sick to participate, and the Delaney Resolution was adopted for the Colorado-Big Thompson Project. (Taylor would die in office in 1941 – still believing that an acre-foot-for-every-acre-foot was what should be adhered to.)

Graphic credit: RogerWendell.com

The compromise process was codified as ‘Senate Document 80,’ part of the Colorado-Big Thompson Project Act passed in 1937. Senate Doc. 80 became part of all subsequent transdivide project planning – except where Denver was concerned; it wasn’t until the veto of Denver Water’s Two Forks Project half a century later that Denver Water finally conceded to take West Slope needs into account in its transdivide projects.

That process of working through a significant challenge to mutual benefit stands, in at least my mind, as one of the highlights of the Era of Conquest in the Colorado River region – a period not without occasional efforts measuring up to the often naive but high-minded vision driving the developers’ ‘romancing of the river’ – to bring deserts into bloom, to reshape unfriendly environments to accommodate individuals and their families willing to work at it. It is too easy to condemn that from this side where we reap the harvest of all the mistakes involved that they didn’t know about until they had made them.

Next post, we’ll look at what happened to that carefully forged intrastate resolution when serious Colorado River planning came to the Compact’s Upper Basin. Meanwhile – pray for monsoons, or just a good rainy spell.

Colorado transmountain diversions via the University of Colorado

Antero Reservoir will close to recreation in 2026 for #drought response: Water from the Park County reservoir will be moved to maximize efficiency during ongoing drought — News on Tap (DenverWater.org)

Water from Antero Reservoir (pictured) will be moved to Cheesman Reservoir in 2026 to help with drought response. This measure was last taken in 2002. Photo credit: Denver Water.

Click the link to read the article on the Denver Water website:

April 20, 2026

In the coming weeks, Denver Water will begin moving water from Antero Reservoir to Cheesman Reservoir, as part of the utility’s drought response.

Antero Reservoir has the highest ratio of evaporation to storage of any of Denver Water’s reservoirs, and moving the water to Cheesman Reservoir will prevent about 5,000 acre-feet of water (about 25% of the reservoir’s storage capacity) from evaporating. One acre-foot of water equals the annual water use of about three to four single-family households a year.

“A lot of forethought and planning went into our collection system and reservoirs,” said Nathan Elder, manager of water supply for Denver Water. “Antero is a drought reservoir, designed to provide water to our customers during a severe drought. Consolidating this water into Cheesman will help us make the most of the water we have.”

Denver Water is working closely with Colorado Parks and Wildlife to minimize the loss of fish during this process and to allow the public to use the reservoir for a brief period before it eventually closes. Following the fish relocation process, there will be no recreation, including camping, allowed at Antero Reservoir in 2026. More details about this plan will be announced when it is finalized.

The decision also allows Denver Water to use more water from its South Platte River Basin supplies, reducing the need to pull as much water from sources west of the Continental Divide, which are also below normal levels following an abysmal snowpack and runoff season.

In a standard year, the water lost to evaporation is recovered by the next runoff season. Because of the historically low snowpack levels in 2026, the water lost this year would not have been recovered.

Drought conditions will determine when the reservoir can be refilled. The reservoir was also drained to assist with water management during the 2002 drought. There were plans to drain the reservoir as a drought response in 2013, though a series of late-season snowstorms allowed Denver Water to continue storing water in the reservoir. The last time Antero Reservoir was emptied was in 2015 for a dam rehabilitation project.

The South Platte River Basin is shaded in yellow. Source: Tom Cech, One World One Water Center, Metropolitan State University of Denver.

Elephant Butte Reservoir could go as low as 2% capacity this summer — Martha Pskowski (@psskow) #RioGrande

The #Colorado Energy and Carbon Management Commission narrowly approves 24 oil and gas wells near #Aurora Reservoir that faced vocal opposition: Crestone Peak Resources had slimmed down plan for pad after state issued a stay on project — The #Denver Post

Aurora looking west towards Mount Blue Sky

Click the link to read the article on The Denver Post website (John Aguilar). Here’s an excerpt:

April 21, 2026

Colorado oil and gas regulators on Tuesday approved a controversial 24-well drilling operation that will sit just over a half-mile from hundreds of Aurora homes and a reservoir that serves as the city’s primary water supply. The 3-2 vote by the state’s Energy and Carbon Management Commission, in favor of the State Sunlight/Long well pad proposed by Crestone Peak Resources, came after about five hours of testimony and deliberation. The decision ends what had become one of the more contentious battles over energy extraction in Colorado. Board Chair Jeff Robbins acknowledged that the application from Crestone had evoked a strong reaction from homeowners living nearby. But in the end, the company complied with rigorous state oil and gas regulations enshrined in a law known as Senate Bill 181, which was passed by state lawmakers seven years ago.

“At the end of the day, State Sunlight/Long achieves the balance we were told to look for,” Robbins said.

[…]

The two commissioners who voted no were Trisha Oeth and John Messner. The approvals process for the Sunlight/Long well pad encompassed seven hearings before the commission, stretching over several months. Nearby homeowners rose up in opposition, claiming that the project would pose health hazards to those living nearby — in particular, to school-age children. They also worried about the drilling’s potential environmental impacts on the Aurora Reservoir, which is a water source for the 400,000 residents of Colorado’s third-largest city.

“I cannot believe that the state came down on the side of the industry yet again,” Randy Willard, the president of opposition group Save the Aurora Reservoir, said in an interview minutes after the vote came down Tuesday afternoon. “The group as a whole is severely disappointed.”

The group had pushed back on the proposed project using the 2019 oil and gas reform law as a guide, Willard said. The 2019 law prioritized public health, safety and the environment when regulators consider oil and gas development — a profound change from the industry-focused approach Colorado had taken for decades.

Hydropower at risk as #ColoradoRiver outlook grows more dire — AZCentral.com #COriver #aridification

A high desert thunderstorm lights up the sky behind Glen Canyon Dam — Photo USBR

Click the link to read the article on the AZCentral website (Debra Utacia Krol). Here’s an excerpt:

April 17, 2026

Key Points

  • The Colorado River system’s water storage has dropped to 36% of its capacity due to a warm winter and ongoing drought.
  • Water levels in Lake Powell are projected to fall below the minimum needed for hydropower generation by this fall.
  • Federal officials are considering moving water from other reservoirs and reducing downstream releases to prevent a shutdown at Glen Canyon Dam.

Within charts listing projections of water levels, inflow and outflow, and anticipated releases for 15 reservoirs in the Colorado River Basin, one message was clear: The river is in dire straits and conditions likely won’t get better anytime soon. The warmest winter on record, coupled with an ongoing drought, has produced dismal conditions for the West’s water lifeline, conditions reflected by the Bureau of Reclamation in its April 24-month report. The system’s storage has plunged to about 36% of its capacity, the agency said in a statement. More alarming in the near term is the threat to hydropower production at Glen Canyon Dam. Water levels in Lake Powell would drop too low to operate the turbines by fall, according to the latest projections, unless the federal government steps in…The situation at Lake Powell raised red flags: The giant reservoir’s “minimum probable inflow,” a measure of winter runoff, is projected to total just 2.78 million acre-feet, or 29% of the historical average, one of the lowest on record, the agency said. By September, projections show the reservoir could decline to below 3,490 feet above sea level, the minimum needed to power the turbines at Glen Canyon Dam that supply electric service to about 5.8 million households and businesses in the region…

Reclamation said it would consider all tools that are available to avoid water levels below 3,500 feet, including a plan to move water from Flaming Gorge Reservoir in Utah and reduce downstream releases from Powell. Flaming Gorge would give up between 660,000 acre-feet up to 1 million acre-feet over the next year. Lake Powell will release about 1.48 million acre-feet less than planned. The move will lower water levels in Lake Mead and potentially reduce Hoover Dam’s hydropower generating capacity by as much as 40%, and would impact recreation throughout the Lower Basin…

The Arizona Department of Water Resources said in its March drought report that most of the state’s snowpack is gone, melted during Arizona’s warmest March on record. The Arizona Drought Monitoring Technical Committee also published its latest three-month drought map, which showed most of the state listed as enduring exceptional drought conditions, the driest level.

Engineering students aim to improve household drinking water — Jennifer Dimas (#Colorado State University)

Undergraduate research students in Civil and Environmental Engineering collaborage with an employee at the Fort Collins Water Treatment Facility near the CSU Foothills Campus. The students are creating a piece of equipment to better evaluate water for treatment levels. Water samples at the treatment facility flow directly from the Horsetooth Reservoir.

Click the link to read the article on the Colorado State University website (Jennifer Dimas):

April 20, 2026

Editor’s note: The FlocBot team will display its work during CSU’s Engineering Days celebration, called E-Days. The event, held by the Walter Scott, Jr. College of Engineering, showcases undergraduate senior design projects. It will run 9 a.m. to 3 p.m. Thursday, April 23, in the Lory Student Center ballroom and on the Student Center Plaza at CSU. Students from the CSU team are available for interviews during the  2026 E-Days event on April 23 at the Lory Student Center on campus.

The future of safe drinking water might be found in the engineering school at Colorado State University.

Here, a student team has invented a device that automates water sampling and data analysis for the chemical treatment used to produce safe drinking water. Not only have the engineering students developed the technology, but they also have founded a startup company to perfect and commercialize it. Their target market: the utilities that treat municipal water to ensure its safety and quality for household use.

The invention is called FlocBot – named for a process called flocculation. During this process, water treatment plants add coagulants to raw water, causing particles and microorganisms, or “floc,” to clump for easier filtration.

Now, treatment plants perform flocculation and associated data collection manually. FlocBot builds upon existing technologies to automate the process, allowing operators to use their plant’s computer-based infrastructure to receive real-time data; this, in turn, allows them to determine their water’s optimal coagulant dose.

FlocBot will allow plants to more accurately dose coagulating chemicals to optimize floc clumps for filtration. Too few chemicals can allow pollutants to get through filters into drinking water. Too many can also impact drinking water quality, while wasting expensive chemicals and wearing down pipes and filters.

“Our goal is to allow water treatment plants and local governments to produce cleaner, more reliable drinking water while minimizing the environmental impact and saving taxpayer dollars,” said Josh Kates, a CSU senior studying civil engineering. He is co-leader of the 14-member FlocBot team. All are students in CSU’s Walter Scott, Jr. College of Engineering.

The student team visited more than 20 water treatment plants in the span of six months to understand the best way to engineer FlocBot. They have tested the device at the Fort Collins water treatment plant.

FlocBot is a senior design project for the students, who have worked on the project since the start of the academic year last fall. They will present their work alongside dozens of other projects during a campus event called Engineering Days, or E-Days, on April 23.

They have already won a business pitch competition called the I4E Startup Spotlight, sponsored by CSU’s Institute for Entrepreneurship.

As the FlocBot students complete their senior year of engineering studies, they are also building their company to commercialize their technology.

“Starting a business is always risky, but we’re fully committed,” Hugh McCurren, team co-leader, said. “We want to make a positive environmental impact in this industry. Based on conversations with numerous plants and possible customers, we’re optimistic about FlocBot’s potential.”

U.S. Government Orders Emergency Actions to Protect #GlenCanyonDam: Extraordinary moves in the struggling #ColoradoRiver basin could prompt historic lawsuits — Brett Walton (circleofblue.org) #COriver #aridification

Glen Canyon Dam and Lake Powell. Photo credit: Brett Walton/Circle of Blue

Click the link to read the article on the Circle of Blue website (Brett Walton):

April 19, 2026

Difficult decisions for the Colorado River are starting to be made.

In what will be a defining year for the struggling watershed, the federal agency that manages the basin’s dams took unprecedented actions on Friday to store more water in Lake Powell in order to preserve hydropower generation and protect water-delivery infrastructure at Glen Canyon Dam that the agency says is at risk of damage due to low reservoir levels.

The April 17 announcement from the Bureau of Reclamation will also set in motion events that could result in first-ever lawsuits from Arizona, California, or Nevada against their upstream neighbors over water supply from the shrinking Colorado River.

The Central Arizona Project, which delivers Colorado River water to Phoenix and Tucson, called Reclamation’s actions “a band-aid” and urged the agency to release even more water from upstream reservoirs into Powell. CAP, because it has lowest water-rights priority in the lower basin, is the most vulnerable to proposed water cuts that would attempt to align water supply with demand.

“There is no time to delay,” Patrick Dent, CAP’s assistant general manager for water policy, told Circle of Blue two days before the announcement.

The Bureau of Reclamation will make two moves to support Lake Powell, the huge reservoir formed by Glen Canyon Dam that is less than 25 percent full and shrinking.

Utah, Colorado, Wyoming and New Mexico are asking the federal government to pause some releases from Flaming Gorge Reservoir, which straddles the border between Wyoming and Utah. The reservoir, pictured here in 2021, is the third-largest in the Colorado River system.

Reclamation’s first move is to release more water from Flaming Gorge, an upstream reservoir that is 82 percent full. With the consent of the four upper basin states, between 660,000 acre-feet and 1 million acre-feet will flow from Flaming Gorge into Powell over the next 12 months.

Reclamation previously used upstream reservoirs to prop up Powell in 2022-23, when some 463,000 acre-feet were released. These extra releases are supposed to be recovered if water supply conditions turn favorable. If more dry years are ahead, then the upstream releases will have been a one-shot intervention.

The agency’s second move is to hold back more water in Powell. Using authority granted in a 2024 decision, the agency will cut Powell’s water releases from 7.48 million acre-feet to 6 million acre-feet. This is the first time that Reclamation has invoked its Section 6(E) authority.

Water supply conditions in the basin worsened each month this year as hot, dry weather drained a meager snowpack that is on a downward trend due to manmade climate change. A heat wave in late March was the most extreme on record in the Southwest for that time of year. Inflows into Lake Powell this year are projected to be the lowest ever measured, breaking a record set in 2002.

The water elevation at Powell currently sits at 3,526 feet. Reclamation has stated that it will do what it can to prevent the reservoir from dropping below 3,500 feet. Hydropower generation stops at 3,490 feet. Without Reclamation’s announced interventions, that level is expected to be breached by August.

With the two interventions, Powell is projected, with average weather conditions, to remain above 3,500 feet by April 2027, but just barely. If the next 12 months continue to be hot and dry, more emergency actions might be necessary.

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

If Powell were to drop below 3,490 feet, water would have to be released through a smaller set of pipes called the river outlet works. Reclamation has said that using these pipes for extended periods of time is untested and risks damaging them.

Reducing outflows from Powell will have two effects. One is that Lake Mead, located downstream, will shrink more quickly, as will its hydropower output. Boating access will be more difficult.

The other consequence is the specter of litigation. The 1922 Colorado River Compact requires the four upper basin states – Colorado, New Mexico, Utah, and Wyoming – to deliver 75 million acre-feet over 10 years. Add in the upper basin’s share of the water required for Mexico and the figure rises to roughly 82.5 million.

Cutting Powell outflows this year to 6 million acre-feet will likely push the 10-year total below the required threshold.

Reclamation is not focusing on the legal implications, says James Eklund, a partner at Taft Law.

“Reclamation is essentially telling the basin states, ‘We are going to protect our billions of dollars’ worth of infrastructure, including Glen Canyon Dam, and if you believe that violates your compact entitlement, you know where the courthouse is’,” Eklund, a former Colorado River commissioner for Colorado, wrote to Circle of Blue.

States in both upper and lower basins have already set aside money for potential litigation or are considering it.

Still, a legal right does not necessarily mean the water is available, Eklund cautions. “No court can conjure acre-feet that aren’t in the reservoir.”

Critics question feds’ plans for future of #ColoradoRiver: In years of severe #drought, ‘the system is failing’, #ClimateChange is sapping river flows as #LakePowell, #LakeMead water levels continue to fall — The #Denver Post #COriver #aridification

Udall/Overpeck 4-panel Figure Colorado River temperature/precipitation/natural flows with trend. Lake Mead and Lake Powell storage. Updated through Water Year 2025. Note the tiny points on the annual data so that you can flyspeck the individual years. Credit: Brad Udall

Click the link to read the article on The Denver Post website (Elise Schmelzer). Here’s an excerpt:

April 19. 2026

The multitude of water managers tasked with overseeing the drying Colorado River systemstand at a dire crossroads. As a years long stalemate in negotiations persists between the seven states that share the river, it’s become increasingly likely that the federal government will impose its own long-term plan, choosing from a range of proposals officials have outlined in recent months. But experts and water managers across the 250,000-square-mile Colorado River basin are raising the alarm about the five plans, questioning if any of them hold up under the new climate reality. They say the federal plans won’t keep the system from crashing in critically dry years — which are becoming more frequent — and could wreak chaos on the pivotal lifeline for 40 million people in the American Southwest.

“In every one of those alternatives, under what they call critically dry hydrology, the system is failing,” said Andy Mueller, the general manager of the Colorado River District, a taxpayer-funded agency based in Glenwood Springs that works to protect Western Slope water. “And critically dry hydrology is what we have continued to see consistently in the basin in the last 25 years and what we should expect going forward.”

[…]

In extremely dry years, the longer-term plans under consideration by Reclamation would allow the water levels of the system’s two main reservoirs to repeatedly fall below minimum power pool. Federal officials then would be forced to make recurring emergency cuts to the water supplies of the three states downstream of the reservoirs, creating uncertainty for millions of people and a massive agricultural industry…Letters from a number of Colorado entities — including the Northwest Colorado Council of Governmentsirrigation districts, the Western Slope’s Club 20 and county commissions from a vast swath of the state — urged federal officials to present at least one plan that would hold up in extremely dry years.

“Sound science dictates that Colorado River management must evolve to handle a permanently drier future,” Tina Bergonzini, the general manager of the Grand Valley Water Users Association, wrote in her comments to the bureau. “The current federal preference for predictability is an atmospheric impossibility given that studies indicate rising temperatures have already slashed river flows by a fifth.”

[…]

The conflict on the Colorado is likely one of the world’s first major water policy overhauls to grapple with the reality of climate change, said Brad Udall, a senior water and climate research scholar at Colorado State University’s Colorado Water Center. In the past, Colorado River managers made operational tweaks and short-term deals to address drought. This time, it’s different.

“We’re not looking at an incremental step here,” Udall said. “We’re looking at a complete redo of how we operate this resource that affects 40 million people.”

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

#Arizona’s Growth Machine keeps churning even as existing communities dry up: Thinking about #GrandCanyon river flows — Jonathan P. Thompson (LandDesk.org) #ColoradoRiver #COriver #aridification

Rendering of the Halo Vista development and TSMC’s campus. Source: discoverhalovista.com

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

April 17, 2026

🥵 Aridification Watch 🐫

Sometimes it feels like there are two parallel Southwestern United States out there.

One is naturally arid, is getting hotter and hotter by the year and is gripped by the most severe drought of the last millennium or more. Its water lifeline, the Colorado River system, is on the brink of collapse, and communities and farmers from Wyoming to Calexico are facing painful mandatory water cutbacks this summer.

And then there’s the other one, a sort of fantasy world, or maybe just an oblivious one, in which new water diversion projects like the Lake Powell Pipeline remain on the table, state leaders prepare to go to legal war to protect their states’ profligate water consumption, and a developer is breaking ground on a 2,300-acre “city within a city” called Halo Vista in North Phoenix.

Halo Vista’s developers are billing it as a companion development to TSMC’s $165 billion semiconductor fabrication facility complex. It will wrap around the industrial campus (thus the “halo” in the name), and plans call for some 30 million square feet of industrial, retail, office, research, and healthcare spaces along with 9,000 or more residential units.

“You have to think about all the people at full build-out who’ll work in this area — about 60 to 80,000 people,” Greater Phoenix Economic Council President Christine Mackay told AZFamily. “They’ll work in the Halo Vista science and technology park. They need restaurants, hotels, places to live — and places to shop for what they need.”

Historically, Arizona’s economy was said to run on five Cs: copper, cotton, citrus, cattle, and climate. Copper is still going fairly strong, most of the citrus groves have given way to housing developments, alfalfa has surpassed cotton, and the beef-cattle have been replaced by dairy factories. Now another C — computer chips — is being added to the mix, as the Phoenix-area experiences a semiconductor manufacturing boom and a coinciding data-center buildup.

The tech industry’s expansion is adding economic diversity, making the city somewhat less vulnerable to 2008-like financial breakdowns. But as Halo Vista demonstrates, it is also feeding Phoenix’s dominant economic force, the Growth Machine. And both the Growth Machine and the data center/semiconductor boom need water, and quite a lot of it. This, in turn, increases Phoenix’s exposure to future water shortages, which seem more and more likely with each passing day.

According to TSMC’s draft environmental assessment, the first phase of its Phoenix fabrication plants will initially use about 4.75 million gallons of water per day, or 5,320 acre-feet per year, which would jump to about 19,400 acre-feet yearly if and when all three phases are built out. But the company says it will eventually install a recycling system that will bring that number down considerably. The 9,000 residential units in Halo Vista would use about 2,800 acre-feet per year (based on Phoenix’s current per-capita water consumption multiplied by a rough estimate of 20,000 people occupying those residences). Halo Vista’s other industrial and commercial properties will consume an unknown additional amount of water.

So let’s say the whole development, including the “fabs,” will use about 25,000 acre-feet per year — less if the water efficiencies are realized, more if Halo Vista’s tech district includes data centers or other water-intensive industries.

That’s a lot of water, or a drop in the bucket, depending on how you look at it.

On the one hand it is equal to about one-fourth of Nevada’s total consumptive use from the Colorado River. Yes, the city of sin and excess only uses about four times more water than the TSMC/Halo Vista “city” will use.

On the other, it’s far less than the alfalfa farms in Maricopa County — in which Halo Vista is located — use for irrigation each year, which totals something like 500,000 acre-feet.1 And yet, Halo Vista/TSMC, once all built out in 20 years or so, will have a significantly larger economic output than a bunch of hay fields (which isn’t the only measure of value or even the most important one, and yet, well, water does flow uphill to money).

So yes, it is possible to sidestep water concerns by pulling out the “what about alfalfa” comparison. But it’s also not all that productive.

Halo Vista, which is being built on a plot of uncultivated state land in the desert, is not displacing an alfalfa farm’s water use. Rather, it represents a new water use piled on top of existing consumption. The water will come out of Phoenix’s municipal system, and therefore officially has an “assured and adequate” 100-year water supply, which is necessary in Arizona for this sort of development.

Yet there’s nothing assured about Arizona’s water future. Phoenix’s water comes primarily from high priority rights on the Salt and Verde Rivers, and from the Colorado River via the Central Arizona Project. But those rights will hardly matter if the rivers dry up: This year’s Salt River Basin meagre snowpack had vanished by March 1, spring runoff peaked weeks ago, and flows are rapidly falling. Meanwhile, the Central Arizona Project has relatively low priority rights, meaning it will be the first to take cuts as the river shrinks.

In other words, aridification and the Colorado River crisis pose an existential threat to Phoenix’s tech boom and, well, Phoenix, itself, which is one of the reasons Arizona Gov. Katie Hobbs is preparing for a bitter legal fight with the feds and the Upper Basin states over the Colorado River.

The good news for the developers and the semiconductor makers is that agriculture continues to use a lot of water in Arizona. And where there is large consumptive use, there is also more room for increased efficiencies and, if it comes to it, “buying and drying” the farms for their water — which has its own negative consequences. The bad news is that the shortages to come may very well exceed the amount that could be wrung out of the existing farms.

Halo Vista, which is on a 20-year buildout schedule, is far from the only major water- and energy-guzzling development on slate for the increasingly arid West. And maybe it’s not realistic to expect all such development to come to a screeching halt simply because the water may run out sometime in the future. After all, climate change could cause more precipitation; maybe in 20 years we’ll be worrying more about flooding than desiccation.

But you would think that planners and policymakers and the developers would at least act in line with our current reality, where resources, especially water, are limited. Halo Vista-esque projects should be required not just to certify an “assured” 100-year supply, but they also should have to offset new consumption with cuts somewhere else, whether it’s paying for farmers to install drip irrigation or funding treated wastewater recycling projects.

Continuing to consume water at current rates is one thing. Adding new uses on top of our current overconsumption is quite another.

***

And so it begins. It looks like residents of the small Arizona community of Kearney may lose their water altogether later this summer, making developments like Halo Vista look even more surreal.

The town sent this emergency memo out to residents in April:

Kearney sits in Arizona’s “Copper Triangle” along the banks of Gila River and in the proverbial shadow of the Hayden copper smelter smokestack. The town was established by the Kennecott Mining Company in 1958 to house residents displaced from Ray, Sonora, and Barcelona as the mine’s gaping Ray mine pit gobbled up the communities. Resolution Copper’s proposed Oak Flat mine is also nearby, as is Faraday’s proposed Copper Creek project.

Kearney has a maximum allotment of 610 acre-feet of water from the Gila River. This year, however, extreme drought conditions have brought the allotment down to just .76 acre-feet, forcing the town to impose severe restrictions on use to try to make it last until the monsoon arrives.

As for all the mines surrounding Kearney? I’m guessing their dealing with their own water issues, but I’d also wager that they’re allowed a heck of a lot more than three-fourths of an acre-foot.


The water footprint of Arizona’s copper mines — Jonathan P. Thompson


Condors perched on steel girders some 450 feet above the Colorado River. Jonathan P. Thompson photo.

🐟 Colorado River Chronicles 💧

In the comment section on the last Land Desk dispatch, reader wkarls reported on the Colorado River’s flows during a recent raft trip on the Grand Canyon. It got me to thinking about how low those flows might go and what that could mean.

I’ve only boated down the Grand Canyon once, back in October and November of 1995 with a group of slightly crazy Salida rafting folks. It was a beautiful, terrifying, sublime — if somewhat debauched — experience. During the trip, releases from Glen Canyon Dam — which make up about 95% of the flow in the Grand Canyon — fluctuated between 11,000 and 16,000 cubic feet per second, a number that was bolstered downstream after a good rainstorm moved through, turning the river that intimidating blood-and-chocolate-milk color. That seemed like plenty of water to me; it was certainly enough to generate waves big enough to toss our little rafts about like toys (did I mention it was scary as hell?).

Somewhat surprisingly, the releases were about the same in September of last year, bouncing between 10,000 and 16,000 cfs, which appears to have been an effort to get the annual flows past Lees Ferry up to about 7.5 million acre-feet to keep the Upper Basin in compliance with the Colorado River Compact’s non-depletion obligation. Then, on Oct. 1, the beginning of the 2026 water year, releases plummeted. This spring they’ve been in that 7,000 to 9,000 cfs range that wkarls mentioned.

That’s in line with the Bureau of Reclamation’s plan to release just 6 million acre-feet from the dam this water year: 6 million acre-feet per year averages out to about 8,200 cfs. That’s also right in line with the Grand Canyon Protection Act’s operating criteria, which set a minimum allowable release during the day (between 7 a.m. and 7 p.m.) at 8,000 cfs, while the minimum nighttime release is 5,000 cfs.

So, given all of that, we can assume that the flows shouldn’t drop much below current levels this summer. Of course, if conditions are worse than expected, then the reservoir could drop to 3,500 feet earlier than anticipated, which could force dam operators to further curtail releases to “defend” minimum power pool. If so, then you might see nighttime releases drop as low as 5,000 cfs. If that’s not enough, then I suppose dam operators would have to go to a run-of-the-river scenario, where flows could plummet to 2,000 or 3,000 cfs, which would make rafting quite interesting.


📸 Parting Shot 🎞️

Colorado River at/around Lees Ferry in autumn 2024, when Glen Canyon Dam releases were around 8,000 cfs.
Colorado River at/around Lees Ferry in autumn 2024, when Glen Canyon Dam releases were around 8,000 cfs.
Colorado River at/around Lees Ferry in autumn 2024, when Glen Canyon Dam releases were around 8,000 cfs.

Forecast for Fryingpan-Arkanasas Project imported water for 2026 barely 10 percent of average — ArkValleyVoice.com #ArkansasRiver #FryingPanRiver

The AVC agreement stores water down-river in the Pueblo Reservoir, built after President John F. Kennedy signed legislation authorizing the Fry-Ark agreement in 1962. Photo courtesy of the City of Aurora.

inClick the link to read the article on the Ark Valley Voice website (Susan Roebuck). Here’s an excerpt:

April 16, 2026

In April and May of each yearthe U.S. Bureau of Reclamation (which operates the Fry-Ark Project) and the Southeastern Colorado Water Conservancy District (SECWCD), which handle allotments of this water, make forecasts about the amount of water that can be imported through the Fry Ark Project. According to Chris Woodka, Senior Policy and Issues Manager, Southeastern Colorado Water Conservancy District (SECWCD), the 20-year average for imported water is 60,000 acre-feet per year. On April 1, the U.S. Bureau of Reclamation forecast importing barely ten percent of that, only 6,500 acre-feet in 2026. This is the least amount imported since the system became fully operational in the late 1970’s.

Also on April 1, the SECWCD projected allocating 4,600 acre-feet of those 6,500 acre-feet to water right holders. However, with the current snowpack, at this time it is not known if there will be any allocation this year. If not, the imported water will be held in storage in one of the Fry Ark Project’s reservoirs.

Fryingpan-Arkansas Project via the Southeastern Colorado Water Conservancy District (Click to enlarge)

Reclamation Acts to Protect #ColoradoRiver System During Historic #Drought: The prolonged drought combined with the lowest winter #snowpack on record is requiring swift actions to protect this vital water system #COriver #aridification

The Colorado River flows through seven states and provides water to 40 million people. Photo credit: USBR

Click the link to read the release on the Bureau of Reclamation website:

April 17, 2026

Long-term drought has reduced Colorado River system storage to about 36 percent of capacity, and the combination of the lowest snowpack on record and record-breaking March heat has further intensified drought conditions across the Basin. These compounding factors are creating elevated risks to essential water and power infrastructure that supply water to more than 40 million people, underscoring the need for immediate action.

Lake Powell’s water year minimum probable inflow is forecasted at just 2.78 million acre-feet—29% of historical average and one of the lowest on record. Reclamation’s April “24 Month Study” projects Lake Powell may decline to below 3,490 feet—the minimum power pool level—by August 2026 without major intervention. If Glen Canyon Dam declines below 3,490 feet, water releases would be only through the river outlet works, which could cause operational issues, uncertainty for users, downstream impacts, instability in regional power and water supplies, and a reduction in power generation. 

Secretary of the Interior Doug Burgum met with Governors for the seven basin states, Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming, and their designees again today to discuss the concerning hydrology and plans for operations. 

“I am grateful for the Governors and their teams working diligently to find a solution to the complex challenges created by these unprecedented drought conditions which require immediate action,” said Interior Secretary Doug Burgum. “Interior and Reclamation continue to coordinate with the basin states, tribes, Mexico and basin stakeholders as we make the decisions necessary to operate and protect the system.” 

To stabilize the system, Reclamation is moving quickly and initial plans include adding up to about 2.48 maf of water to Lake Powell by moving water from the upstream Flaming Gorge Reservoir and by reducing releases from Lake Powell.  [ed. emphasis mine]

Through the 2019 Drought Response Operating Agreements, Reclamation is intending to release 660,000 acre-feet to 1 maf from Flaming Gorge Reservoir from April 2026 through April 2027. In addition, Reclamation is intending to reduce the annual release volume from Lake Powell to Lake Mead by 1.48 maf—from 7.48 maf to 6.0 maf—through September 2026 by utilizing section 6E of the Record of Decision from the final 2024 Supplemental Environmental Impact Statement for near-term Colorado River Operations.  

Together, these actions are expected to increase Lake Powell’s elevation by approximately 54 ft to at least elevation 3500 feet by April 2027. Through the current, ongoing DROA process, the basin states, tribes and partners continue to provide feedback related to the proposed releases. A final decision will be coming next week. 

Flaming Gorge Reservoir now holds about 3.1 maf of water, which is 83% full. These actions are expected to lower the reservoir’s elevation by roughly 35 feet over the next year to approximately 59% of capacity. This will have no effect on contracted water rights at Flaming Gorge or Lake Powell. No additional releases from the other upstream initial units of the Colorado River Storage Project Act—Blue Mesa and Navajo reservoirs—are planned at this time, due to their low water levels and poor forecasted inflows.  [ed. emphasis mine]

“Given the severity of the risks facing the Colorado River system, it is imperative that we take action quickly to protect a resource that supplies water to 40 million people and supports vital agricultural, hydropower production, tribal, wildlife, and recreational uses across the region,” said Assistant Secretary – Water and Science Andrea Travnicek. “As we weigh current conditions and prepare for future operations by working with states, tribal nations and stakeholders, the Department of the Interior and Reclamation remain fully committed to taking the actions necessary to reduce impacts on water deliveries, safeguard critical infrastructure, and preserve as much operational flexibility as possible.”   

Basin-wide impacts 

Reclamation acknowledges that the proposed reduced releases from Lake Powell will accelerate the downstream decline of Lake Mead, with the potential for up to an additional 40% reduction to Hoover Dam’s hydropower generating capacity as early as this fall. Reclamation and its lower basin partners are collaborating to conserve water in Lake Mead and maintain its water levels, even as releases from Lake Powell are planned to decrease.  

The initial proposed drought response actions may also impact recreation across multiple sites. At upstream reservoirs, boating access may be reduced earlier in the season than normal. In the Grand Canyon, lower flow rates will affect rafting conditions, and fishing may be more challenging. At Lake Mead National Recreation Area, reduced water levels may further limit boating access. Reclamation is working with reservoir recreation management partners now and as the summer progresses.  

The 2026 operational challenges come at a time of transition as the existing agreements that guided the operations of the Colorado River for the last two decades are set to expire at the end of the year. As we approach the new water year on October 1, the seven basin states have not reached consensus on a new operating framework. With time running out, there is a need for extraordinary collaboration for 2027 and beyond. In the absence of a consensus and following the completion of the NEPA process, the Interior Department will be prepared to determine operations for Post 2026 later this summer to provide certainty and stability for the Colorado River Basin.  

To learn more about the Interior Department’s or Reclamation’s activities around the Colorado River, please visit the Colorado River Basin website

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

Feds’ $140 million promised to #ColoradoRiver drought mitigation projects remains stuck for ‘bureaucratic’ reasons — The Summit Daily #COriver #aridification

The Colorado River passing Grand Junction, Colorado. Photo by Robert Marcos.

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

April 13, 2026

Despite pressure from Colorado’s congressional delegation, around $140 million in federal funding previously granted to Western Slope water projects has lingered in limbo for nearly 16 months. The funds, awarded to 17 Western Slope projects in the final days of President Joe Biden’s administration, were part of the Inflation Reduction Act’s drought mitigation grant opportunity for the Upper Colorado River Basin. This included $40 million granted to the Colorado River District to aid in its purchase of the Shoshone water rights, the oldest and largest non-consumptive right on the Colorado River tied to the hydropower plant in Glenwood Canyon.  Three days after the awards were announced, President Donald Trump took office, and his Day 1 order, “Unleashing American Energy,” called for all federal agencies to “immediately pause the disbursement of funds appropriated through the Inflation Reduction Act.” In June, the U.S. Bureau of Reclamation released funds for two of the projects in the Orchard Mesa Irrigation District in Palisade, but the rest remain frozen. 

“The funding has not yet been released, and that’s a real concern given current conditions across all of Colorado, but particularly western Colorado,” said Rep. Jeff Hurd, a Republican representing Colorado’s third district spanning the Western Slope, in an interview on Thursday, April 9. “I am continuing to press hard for clarity on timing and next steps because those projects were awarded for a reason and the need has not gone away.”

The Inflation Reduction Act set aside $4 billion toward drought mitigation, including funds for the Bureau of Reclamation’s Upper Colorado River Basin System Conservation and Efficiency program, also known as the Bucket 2E funding. In January, the Bureau under Biden’s administration allocated a total of $388.3 million to 42 projects on tribal land and in states in the Upper Basin. 

Shoshone Falls hydroelectric generation station via USGenWeb

This included $152 million for 17 projects in Colorado, including those for wildlife habitat, watershed and stream restoration, water infrastructure improvements and more. Only $12 million of this funding for two Orchard Mesa Irrigation District projects  — meant to improve water delivery to the 15-mile reach of the Colorado River, which extends from Grand Junction and the confluence of the Gunnison River and serves as critical habitat for several endangered fish species, as well as install new metering technology in the Grand Valley — has been released to the awardees.  The largest Colorado award was the $40 million promised to the River District, which represents 15 Western Slope counties. This funding represented a large chunk of the $98.5 million that the River District needs to purchase the Shoshone water rights from Excel Energy. Outside of the frozen federal dollars, the River District has raised $57.2 million from the state Legislature, its board and the various Western Slope municipalities and utilities it serves.  Matt Aboussie, Colorado River District’s communications director, said the district continues to work closely with the Bureau of Reclamation to secure this promised funding and remains committed to securing the rights. 

“Funding will not be the obstacle that stops this effort,” Aboussie said. “If needed, River District leadership is prepared with alternative funding options and continues to rely on all our communities to get this project across the finish line.”

Abysmal math on the #ColoradoRiver: Feds look to avoid de facto deadpool at #GlenCanyon Dam — Jonathan P. Thompson (LandDesk.org) #COriver #aridification

The Central Arizona Project canal, which carries Colorado River water to Phoenix and Tucson, as it runs past fields in the desert (that are irrigated with groundwater, not CAP water). The CAP is not likely to see new cuts this year beyond the levels already imposed. Source: Google Earth.

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

April 14, 2026

🐟 Colorado River Chronicles 💧

With each passing April day without major snowfall, we gain more clarity on the Colorado River situation and what things might look like this summer, which is, in a word, grim. Or, as Arizona’s top water officials put it: “The winter and spring snowpack and runoff projections in the upper basin are abysmal.”

The Colorado River Basin Forecast Center is putting a number to that term by predicting that the Colorado River system will deliver about 1.4 million acre-feet1 of water to Lake Powell from April 1 through July 31. That’s about 23% of the median for the spring runoff season, which is when flows are most abundant, and just over half of last year’s not so great figure of 2.6 MAF.

This year’s Upper Colorado Basin spring runoff is forecast to be about 1.4 million acre-feet. That isn’t as low as 2002, which was just below 1 million acre-feet, but if conditions don’t improve it could fall even lower than that. Source: Colorado River Basin Forecast Center.

Believe it or not, that figure — the official 50% forecast, made by an actual person — may be optimistic. Over the last two weeks, the Ensemble Streamflow Prediction model (which is a constantly updating automated forecast) has come up with an even more dire outlook, downgrading the forecast to 1.16 MAF during that same time period.

Abysmal, indeed.

We’re also getting a little more information as to how the feds plan to address the crisis, at least in the near-term. Most significantly, they tentatively plan to “defend” minimum power pool at Glen Canyon Dam, which is to say they will do what it takes to keep the surface level of Lake Powell at or above 3,500 feet in elevation to avoid relying on the lower river outlets, which are not engineered for sustained use. The weapons they will use for this defense include:

  • Reducing Lake Powell releases from the planned 7.48 million acre-feet to 6 million acre-feet.
  • Releasing up to 1 MAF from the “Upper Initial Units,” which includes Flaming Gorge, Blue Mesa, and Navajo Reservoirs. Hydrology may make this impossible, however, meaning that these releases could be as low as 650 MAF .65 MAF (or 650,000 acre-feet).
  • For now, Interior is not asking for larger cuts from the Lower Basin (beyond the 1.5 MAF cuts they’ve already taken), which presumably means the feds will not reduce Lake Mead releases through Hoover Dam.

But will it be enough to avoid dipping below what I call de facto deadpool at Lake Powell? We won’t really know until later this summer, but a fairly simple calculation can help predict that future. Keep in mind that I’m no hydrologist, I’m just working with the numbers that are available to see whether potential inputs (Lake Powell inflows) are at least equal to planned outputs (Glen Canyon Dam releases).

I put together this little diagram to help visualize things. I know the text is tough to read in the email version, and especially if you’re reading this on your phone. So I’d suggest clicking on the image (or the headline of this post) and viewing it in the web version.

Simplified diagram of Glen Canyon Dam with inputs (on the right) and outputs (on the left). *Fish pool is the surface level scientists have deemed necessary for minimizing the potential of non-native bass escaping through the dam and propagating downstream, where they can compete with endangered native fish. Infographic by Land Desk using data from Bureau of Reclamation and the Colorado River Basin Forecast Center.

Here are the figures for the equation. 

Inflows:

  • 1.5 MAF: Lake Powell Storage available above 3,500 feet.
  • 1.1 MAF to 1.4 MAF: Forecast Lake Powell inflows April-July
  • .65 MAF to 1 MAF: Planned releases from upper basin reservoirs.

TOTAL INFLOWS: 3.25 to 3.9 MAF

Outflows:

  • 2.9 MAF: April 1 – Oct. 1 releases to reach 6 MAF for the water year (3.13 MAF has already been released)
  • .3 MAF: Rough estimate of evaporation from Lake Powell for the remainder of the water year.

TOTAL OUTFLOWS: 3.2 MAF

That gives us a whopping .05 to .7 million acre-feet to spare. That is cutting it close, folks; a hot, dry summer could drive evaporation levels up, and/or bring inflows down, shaving off the sliver of breathing room this affords. But unless the outlook dims considerably, the BoR should be able to avoid a run-of-the-river situation this year, which is good news. And, since Arizona likely will not be required to take more cuts this year, the state will probably hold off on doing a compact call and dragging the Upper Basin to court. 

These measures, however, will have a variety of consequences, including:

  • The Upper Basin reservoirs (Flaming Gorge, Navajo, Blue Mesa) are also likely to see record low inflows this year. That, combined with up to 1 million acre-feet of additional releases to benefit Lake Powell, will draw them down considerably, affecting hydropower production, irrigation, and, especially, recreation. 
  • Non-native smallmouth bass are abundant in Lake Powell, but since they are warmer-water fish, they tend to stay near the surface of the reservoir, meaning under normal conditions they stay well above the penstocks, or the outlets in the dam that lead to the hydropower turbines. However, as the surface drops closer to the penstock openings, so do the fish, allowing them to get flushed through the dam into the Colorado River. And because the water released from the dam is warmer (since it’s nearer to the surface), that warms the river downstream, allowing the bass to thrive and compete with the endangered native fish downstream. This is likely to be exacerbated as the surface level nears 3,500 feet. 
  • This year’s 6 MAF release from Glen Canyon Dam will bring the ten-year aggregate flows at Lees Ferry down to about 79 million acre-feet. This potentially puts the Upper Basin in violation of Article III of the Colorado River Compact, which mandates that the Upper Basin “not cause the flow of the river at Lee Ferry to be depleted below an aggregate of 75 million acre-feet” for any 10-year period. A 1944 treaty added another 7.5 million acre-feet to this figure to cover half of Mexico’s allotment, making for a total of 82.5 MAF over ten years. Note: The interpretation of this provision is in dispute. 
  • The diminished reservoir levels, combined with the reduced releases, will lead to lower hydropower output from the dam. That will force tribes, communities, and utilities that buy the relatively cheap power to purchase it on the open market. And it will also cut into power-sale revenues, which help fund endangered fish recovery programs. 
  • Reduced dam releases will mean lower flows, on average, through the Grand Canyon, affecting riparian ecosystems and boating. 
  • Reduced dam releases equate to lower flows into Lake Mead. Since the BoR apparently does not plan to cut releases from Hoover Dam, that reservoir will likely see its levels drop considerably, diminishing hydropower output and affecting recreation. My rough calculation suggests Lake Mead’s surface level will drop from the current 1,060 feet to about 1,030 feet, which would be lower even than in 2022. The BoR has suggested it will “defend” a level of 1,000 feet. That would almost certainly lead to Lower Basin shortages.
It’s still a long ways out, but for now the NOAA is calling for above average precipitation in the Southwest later this summer.
A super El Niño appears to be forming, but the effects in the Upper Colorado River Basin are especially hard to predict because it sits right in between the “warmer, drier” and the “wetter, colder” zones, meaning it could go either way. Source: NOAA.

There is potentially good news on the horizon. Conditions are ripening up for a “super” El Niño to begin forming this summer. It’s difficult to predict how that will affect the Upper Colorado River Basin, but for now, forecasts are calling for a strong monsoon in the Southwest, beginning in July. That probably would not do much to bring up Lake Powell’s levels, but it would provide relief to the many farmers who are almost certain to lose irrigation relatively early this summer and may help keep late-summer megafires at bay. And, you never know, El Niño might just bring a monster winter just when we need it most.


A Colorado River glossary and primer — Jonathan P. Thompson


1 *The forecasts are for the “unregulated flow,” which means that it is an estimate of what the flow would be without upstream dams holding water back. This is not the same as “natural flow” which is a calculation of what the flow would be without upstream human consumptive use, dams, or diversions. In this case, actual inflow and unregulated inflow are almost the same.

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

Aspinall Unit operations meeting date has changed to Monday, April 20, 2026 at 1:00 PM #GunnisonRiver #ColoradoRiver #COriver #aridification

Crystal Dam, part of the Colorado River Storage Project, Aspinall Unit. Credit Reclamation.

From email from Reclamation (Andrew P. Limbach):

April 14, 2026

Meeting date changed to Monday, April 20th, 2026 at 1:00 pm. 

In an effort to better coordinate with the upper initial unit work groups and ongoing DROA discussions, the upcoming Aspinall Unit Coordination Meeting for the Aspinall Unit & Gunnison River has been changed to Monday, April 20th, 2026 at 1:00 pm. Sorry for the short notice and any inconvenience this may cause. 

This meeting will still be held virtually via Microsoft Teams. There will not be an in-person meeting location for this meeting. The link to the Teams meeting is below.

Contact Andrew Limbach (alimbach@usbr.gov or 970-248-0644) for more information regarding Aspinall operations or the Operation Group meeting.

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

#Denver Board of Water Commissioners approves temporary drought pricing as part of Stage 1 #drought response — DenverWater.org #SouthPlatteRiver #ColoradoRiver #COriver #aridification

Click the link to read the article on the Denver Water website:

April 8, 2026

Lea este artículo en español.

Denver Water’s collection and service areas continue to face severe drought conditions, with historically low snowpack and concerns about the diminished spring runoff that will be available to meet customer’s water needs in the future. 

As a result, at its meeting today, the Denver Board of Water Commissioners adopted a resolution approving the implementation of temporary drought pricing on outdoor water use. The drought pricing will apply starting with May water use (reflected in June bills) and will be in effect through April 30, 2027, or until further action by the board.

Under the temporary drought pricing, residential customers will see a drought charge on Tier 2 water use of $1.10 per 1,000 gallons. Tier 3 will have a drought charge of $2.20 per 1,000 gallons. The temporary drought charges will be added on top of the customer’s existing 2026 water rates.

Tier 1, which covers essential indoor water use, is exempt from drought pricing.

“Implementing temporary drought pricing is not a step we take lightly. It is one of many tools Denver Water has available — when needed — to respond to drought conditions, encourage customers to conserve our water supply, and ensure our ongoing ability to operate and maintain the system that delivers clean, safe water to 1.5 million people,” said Alan Salazar, Denver Water’s CEO/Manager. 

“Drought charges signal to our customers the premium value of water in a drought, while exempting essential indoor water use. We haven’t needed to use this tool in more than 20 years — since the historic drought of 2002-04 — and conditions surrounding this year’s snowpack and potential runoff are shaping up to rival, and possibly be worse than, those years,” Salazar said.

Please keep sprinklers OFF until mid-to-late May, or later if it rains, to help stretch the water supplies we have. Hand water trees and shrubs if needed. It’s a drought. Use Only What You Need. Photo credit: Denver Water.

Under the temporary drought pricing approved by the board, for Denver Water residential customers in Denver and the suburbs:

  • e first tier will be exempt from the temporary drought charge. This tier is charged at the lowest rate and covers essential indoor water use for bathing, cooking and flushing toilets. Each customer has their individual first tier determined by the average of their monthly water use as listed on bills that arrive in January, February and March — when there is very little or no outdoor watering.
  • The second tier will have a temporary drought charge of $1.10 per 1,000 gallons added on top of their 2026 water rates. This tier is for water consumption, typically used for outdoor watering, that is above the customer’s first tier and up to 15,000 gallons of water per month. Water use in this tier is considered to be an efficient use of water outdoors.
  • The third tier will have a temporary drought charge of $2.20 per 1,000 gallons of water added on top of their 2026 water rates. Tier 3 is for water use above the second tier each month. It is priced at the highest level to signal potentially excessive water use and encourage conservation efforts by larger-lot customers.

The board’s decision to impose temporary drought charges on outdoor water use follows its March 25 declaration of Stage 1 drought. The declaration seeks a 20% reduction in water use effective immediately, with the goal of preserving water supplies and to help avoid the need for Denver Water to take further actions later this summer if conditions don’t improve. Read the March 25, 2026, drought declaration.

The snowpack, which supplies the water Denver Water captures, stores, treats and delivers to customers, is at historically low levels despite recent storms that brought some much-needed precipitation to the mountains and city last week.

It’s a drought. Image credit: Denver Water.

“We welcome the storms that do come, while knowing that this year’s snowpack is at historically low levels and hopes for a Miracle May snowstorm are dimming. And Denver Water has made a number of tools available to help customers reduce their water use — whether it’s a normal year or a drought year. We encourage our customers to take steps to conserve water for this drought and be better prepared to manage through future dry times,” Greg Fisher, Denver Water’s manager of demand planning and efficiency.

Denver Water’s temporary drought pricing charges a premium for outdoor water use and covers several classes of customers, including residential, large irrigation, wholesale and raw water customers. (See the chart at the bottom of this story for additional information on nonresidential customers.)

An individual residential customer’s monthly water bill will vary depending on where they live in Denver Water’s service area (in Denver or in one of the utility’s suburban distributor districts) and how much water they use. Drought charges are expected to incentivize customers to reduce outdoor water use.

The following two charts illustrate the potential impact of the temporary drought charges on an annual water bill for residential customers living inside the city of Denver and, below that, in a Total Service suburban distributor district.

Examples of the impact of temporary drought charges on an annual water bill for Denver Water customers living inside Denver. In this example, “super conservers” will see their bills increase by roughly $7 annually. High users who do not conserve will see their bills increase by roughly $76 in one year. Individual bills will vary. Image credit: Denver Water.

In these charts, the categories are:

  • “Super conserver”: A customer who has very little outdoor water use, maybe only watering trees and shrubs throughout the year.
  • “Good conserver”: An average customer who reduces their annual water use by 20%, from 104,000 gallons (the average use by residential customers in an average year) to 82,000 gallons.
  • “Non-conserver”: An average Denver Water residential customer who uses 104,000 gallons of water over the course of the year (the average use by residential customers in an average year) and doesn’t respond to Denver Water’s call to reduce water use by 20%.
  • “High user”: A customer in the top 25% of residential water users. 

The following chart illustrates temporary drought charges impacts for residential customers who live in one of Denver Water’s Total Service distributor districts in the suburbs. (Learn more about Denver Water’s suburban customers.) 

Examples of the impact of the temporary drought charges on an annual water bill for Denver Water customers living in one of Denver Water’s Total Service suburban distributor districts. “Super conservers” will see their bills increase by roughly $8 annually. High users who do not conserve will see their bills increase by roughly $76 in one year. Individual bills will vary. Image credit: Denver Water.

“This is not Denver Water’s first drought. We know our customers strive to be efficient in their water use, and we know we are asking them to use less to stretch the water supplies we have in this drought. We also know that success in reducing water use will result in reduced revenue for our organization. We have tools to address reduced revenue and ensure the organization maintains its financial foundation for when this drought is over,” said Angela Bricmont, Denver Water’s chief financial officer.

If customers comply with Denver Water’s request to reduce water use by 20%, the utility estimates 2026 revenue to fall by a commensurate amount. While drought pricing can offset a portion of that reduction, the utility will rely on cash reserves and budget reductions to cover the majority of the gap. 

Denver Water has proactively reduced its spending, taking steps that include enacting a hiring freeze and reviewing maintenance and other projects to see which ones could be deferred.

Now is the time to replace non-native plants with with drought-tolerant plants. Photo credit: Denver Water

To help customers Use Only What They Need indoors and outdoors, Denver Water offers a range of tools, including: 

Additional information and tips are available on our conservation website.

Temporary drought charges for nonresidential customers:

Navajo Reservoir Spring Operations meeting Tuesday April 21, 2026 from 1-3pm — Reclamation

Aerial image of entrenched meanders of the San Juan River within Goosenecks State Park. Located in San Juan County, southeastern Utah (U.S.). Credits Constructed from county topographic map DRG mosaic for San Juan County from USDA/NRCS – National Cartography & Geospatial Center using Global Mapper 12.0 and Adobe Illustrator. Latitude 33° 31′ 49.52″ N., Longitude 111° 37′ 48.02″ W. USDA/FSA, Public domain, via Wikimedia Commons

From email from Reclamation :

April 14, 2026

Reminder Navajo Reservoir Spring Operations MTG Tuesday April 21st from 1-3pm. The meeting will be entirely virtual; members of this list should have received a Teams invite. If you did not and would like to attend email cfelletter@usbr.gov for a meeting invite. 

Reclamation conducts Public Operations Meetings three times per year to gather input for determining upcoming operations for Navajo Reservoir. Input from individuals, organizations, and agencies along with other factors such as weather, water rights, endangered species requirements, flood control, hydro power, recreation, fish and wildlife management, and reservoir levels, will be considered in the development of these reservoir operation plans. In addition, the meetings are used to coordinate activities and exchange information among agencies, water users, and other interested parties concerning the San Juan River and Navajo Reservoir. 

Conservation isn’t enough for the #ColoradoRiver’s drier future, #Arizona State University water expert says — KJZZ.org #COriver #aridification

Phoenix had native water, but expansive growth, among the fastest in the nation, has been enabled by imported Colorado River water since the 1990s. Photo/Allen Best

Click the link to read the article on the KJZZ website (Alex Hager). Here’s an excerpt:

April 13, 2025

A new article by an Arizona State University water expert argues that existing conservation measures are a step in the right direction, but may not be effective enough in the face of climate change. Dave White, director of ASU’s Global Institute of Sustainability and Innovation, says city leaders around the Colorado River basin need to think bigger to plan for a future in which the river has less water to go around.

“We have to think about a reset, a recalibration,” White told KJZZ, “to have an economy and a lifestyle in the southwest that lives within the means of the new normal of water availability in the Colorado River.”

White, alongside The Pennsylvania State University’s Renee Obringer, wrote that cities such as Phoenix, Denver and Las Vegas have made major strides in saving water among homes and businesses. In Phoenix, conservation programs led to a 20% reduction in water use over 20 years, while the population grew by about 40%…Even under aggressive conservation measures, though, the new report explains that demand management practices “won’t be able to keep up” with the kind of hot, dry conditions that fueled the current 26-year megadrought and will likely continue for years in the future…New technologies will likely be a big part of cities’ drought response going forward. White pointed to the need for water reuse programsdesalination facilities and reductions to the amount of water consumed for electricity generation. While Central Arizona cities are already looking to some of those technologies, White said changes may be needed sooner than they can be deployed.

Udall/Overpeck 4-panel Figure Colorado River temperature/precipitation/natural flows with trend. Lake Mead and Lake Powell storage. Updated through Water Year 2025. Note the tiny points on the annual data so that you can flyspeck the individual years. Credit: Brad Udall

Trump cancels #PecosRiver mining ban process: Hottest March on record; Healing the earth is hard — Jonathan P. Thompson (LandDesk.org) 

The Atlas Uranium Mill near Moab as it appeared in May of 1972. Source: DOCUMERICA: The Environmental Protection Agency’s Program to Photographically Document Subjects of Environmental Concern.

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

April 10, 2026

⛏️ Mining Monitor ⛏️

The Trump administration has formally cancelled the proposed withdrawal of more than 160,000 acres in the Upper Pecos River Watershed from new mining claims and mineral leasing.

Prompted by local advocacy and New Mexico’s congressional delegation, the Biden administration began the process of protecting the watershed and surrounding mountains east of Santa Fe in 2024. But the Trump administration nipped the process in the bud shortly after taking office by cancelling scheduled public meetings. Now it has officially ended the withdrawal.

For the past several years, Comexico LLC, a subsidiary of Australia-based New World Resources, has been working its way through the permitting process to do exploratory drilling at what it calls its Tererro mining project on more than 200 active mining claims in the watershed. It has met with stiff resistance from locals and regional advocacy groups, partly because mining has a dark history in the Pecos River watershed. In 1991, a big spring runoff washed contaminated mine and mill waste from a long-defunct mine into the upper Pecos River, killing as many as 100,000 trout. That prompted a multi-year cleanup of various mining sites.

The withdrawal wouldn’t have stopped the project outright, because it doesn’t affect existing, active, valid claims. Yet it would have stopped the company from staking more claims and would make it more difficult to develop the existing ones (especially if they haven’t established validity).


I have a saying I coined while writing River of Lost Souls that goes like this: Mining is hard. Putting the earth back together again afterwards is a hell of a lot harder. That’s probably especially true when it comes to mining and milling uranium, given that along with all the other nasty byproducts of mining, it also leaves behind radioactive material. The point was recently driven home by two events:

  • Moab officials celebrated the removal of 16 million tons of uranium tailings from the Atlas mill site alongside the Colorado River following a decades-long cleanup effort. Remediation work continues. 
  • Meanwhile, over at the cleaned up Durango uranium mill site (now a dog park), the Department of Energy’s most recent verification monitoring report finds that natural uranium flushing in the groundwater beneath the site is happening slower than expected. There’s no reason for concern at this point: Researchers are still confident that uranium concentrations will drop below the compliance goal within the allotted 100-year time period.

I mention it here because of the time-scale involved: The Atlas mill in Moab stopped operating more than 40 years ago, and the cleanup has dragged on for close to two decades. The Durango mill shut down for good in 1963; the massive, years-long, multi-million-dollar cleanup was completed in 1991. And researchers expect it to take another 65 years for the groundwater contamination to finally get back to acceptable levels. 

It’s just something to keep in mind when considering new uranium mines and mills.


The rise of the Land-healing Industry — Jonathan P. Thompson


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

🐟 Colorado River Chronicles 💧

One of the more frustrating things about the Colorado River crisis is that the federal government, which controls the big dams and most of the extensive plumbing system on the river, has hardly given even a clue as to what it might do when Glen Canyon Dam reaches the critical minimum power pool mark as early as this summer.

Will they shut down the hydropower turbines and route all releases through the river outlets, possibly compromising the outlet tubes’ — and the dam’s — structural integrity? Will they “defend” minimum power pool by cutting back releases, thereby putting the Upper Basin in violation of the Colorado River Compact? Or will they drain Upper Basin reservoirs in an effort to maintain minimum power pool while also keeping releases at a level that will keep Lake Mead from dropping too precipitously? Maybe they’ll use the bunker-busting bombs intended for Iran to very quickly blast bypass tunnels through the canyon walls to render the dam obsolete?

The answer is still a mystery, but Interior Secretary Doug Burgum finally hinted coyly about the government’s potential approach (Interior oversees the Bureau of Reclamation, which runs most dams). The Arizona Star’s venerable environmental reporter Tony Davis reports that Burgum told a Tucson roundtable this week:

Okay, I don’t know what that means, exactly, but at least they’re planning to do something. The last statement hints at their intent to defend the minimum power pool on Glen Canyon Dam (lest they’ll lose power generation altogether). We’ll probably learn more during the Glen Canyon Monthly Operations Call in the coming week or two. So stay tuned.

As long as we’re on the subject of the federal government doing something about the Colorado River, when’s Trump going to order his people to open the giant faucet up in Canada and send water gushing down to the Southwest?


Trump’s giant faucet: And the tragic Myth of More — Jonathan P. Thompson

🤯 Annals of Inanity 🤡


🥵 Aridification Watch 🐫

This won’t come as a surprise to many people, but it’s now official: March 2026 was the hottest March on record by a lot in the Southwest and beyond. The Upper Colorado River Basin’s average temperature for the month was 46.5° F, or more than 13° higher than the 1895-2026 median. The graph below makes it very clear that the place has been getting hotter over the past fifty years, with the only real break coming in March 2023, when snow was piling up in the mountains.

March 2026 was the hottest March since 1895 by far in the Upper Colorado River Basin. Source: NOAA.

The March scorcher followed the warmest winter and first half of the water year (Oct-March) for most of the West.

The result is clear: Even though precipitation accumulation wasn’t terribly far below normal, the snowpack was. The April 1 snowpack across Colorado was at a record low level, according to this year’s snow course, which is done by manual measurement and so goes back much farther than SNOTEL measurements.

The April 1 snowpack this year was lower than in 1977, 1981, and 2002, the worst winters of the last nine decades, at least. Source: Center for Snow and Avalanche Studies and NRCS.

Early April storms have helped keep the snow around a bit longer in the mountains, but has done little to bolster the snowpack. It’s still at historically low levels. 

🗺️ Messing with Maps 🧭

Maybe we’ll have a really wet spring and summer. If not, well, this is what the National Interagency Fire Center says we can expect. Not great.

‘We’ve never seen a year like this’: Worst drought conditions on record predicted for 2026 — The #GrandJunction Daily Sentinel #ColoradoRiver #COriver #aridification

Juniata Reservoir, located near Grand Mesa, is where the city of Grand Junction stores water coming off Grand Mesa in the Kannah Creek watershed. That water flows down Kannah Creek and eventually into the taps of Grand Junction residents. Photo courtesy of City of Grand Junction

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

April 11, 2026

Local water utilities are raising the alarm about the severe drought Mesa County is in and are asking users to voluntarily limit their usage now to conserve water. At a Thursday press conference in Palisade, representatives from the area’s water utilities and the National Weather Service described the situation in stark terms. Grand Junction Public Utilities Director Randi Kim said the winter snowpack is delivering far less water than normal and spring runoff began more than a month early.

“This year in March, our snow survey indicated that our snowpack across the city’s Kannah Creek watershed was at 41% measured as snow water equivalent over the 35-year historical average,” Kim said. “Due to warm weather conditions, runoff in Kannah Creek started on March 26, which is about five to six weeks earlier than normal.”

In response, Kim asked Grand Junction’s water users to help conserve water now. Representatives from Ute Water suggested limiting outdoor watering as an important step in conserving water.

“With Grand Junction currently in D3 extreme drought, the city is asking all of our customers to take actions to conserve water,” Kim said. “Participating now in water conservation actions will help preserve the city’s water supply should that drought persist through the summer and necessitate the city rely upon our stored water rather than direct flows from Kannah Creek.”

[…]

Kim said the city’s Grand Mesa reservoirs are full and it has 1.75 years of water in storage, so it is not facing the prospect of running out of water this year…Data on the Colorado River Basin goes back 130 years. Experts say 2026 will be worse than any of those, likely by a longshot…A perfect storm of factors are behind those concerns.

Erin Walter, service hydrologist for the National Weather Service, said at the Thursday press conference that the record low snowpack has combined with record warm weather to make for especially challenging conditions. In March alone, Walter said Grand Junction saw eight consecutive days of record warm temperatures. That warm weather is persisting into April, Walter said, and forecasts predict it will continue through June. Those conditions could result in the worst drought on record…n reservoirs essential to the Western Slope, that means less water to work with. Green Mountain Reservoir, which includes the Historic User Pool that helps supply numerous farmers, is not expected to fill this year, according to Flinker. Meanwhile Blue Mesa Reservoir, which requires 419,000 acre-feet to fill and supplies water to the Gunnison River before it joins the Colorado River in Grand Junction, is forecast to get only around 200,000 acre-feet this year.

West Drought Monitor map April 7, 2026.

Local rivers likely reached peak flow in March: Forecasts show little relief from high temperatures and low precipitation as reservoir operators make plans for release of irrigation water — Heather Dutton (AlamosaCitizen.com) #RioGrande #snowpack #runoff

Rio Grande. Credit: The Citizen

Click the link to read the article on the Alamosa Citizen website (Heather Dutton):

April 13, 2026

Water Managers anticipate flows in the San Luis Valley’s rivers and creeks will be very low in spring and summer 2026. 

The Colorado Division of Water Resources Division 3 Engineer’s April 6 10-day report forecasted the total annual flow of the Rio Grande at the Del Norte gage will be 270,000 acre-feet, which is 42 percent of the long-term average. For reference, flows of the Rio Grande at Del Norte in 2018 totaled 280,400 acre-feet. The forecasted flow of the Conejos River system is 110,000 acre-feet, which is 37 percent of the long-term average. The snow water equivalent on April 9 for the Upper Rio Grande Basin was 12 percent of the median for 1991-2020. 

The National Weather Service is forecasting hot temperatures along with below average precipitation into the summer. The irrigation season began on March 23 on the Rio Grande and March 16 on the Conejos River. As such, on-stream reservoirs are required to pass all inflows to satisfy the needs of downstream senior water rights holders. Given the low amount of snow, the exceptionally warm spring temperatures, and the anticipated summer drought conditions, it is possible that local rivers reached peak flow in March. 


Rio Grande operations

The operators of reservoirs on the Rio Grande will time their releases of irrigation water to coincide with the canals being in priority to allow water to reach farmers. It is anticipated that many of the canals will only be in priority to divert water for a short time window, in some cases only days or weeks. As such, releases of irrigation water will begin in the next week. 

The Santa Maria Reservoir Company will begin releasing stored irrigation water into North Clear Creek on April 14 at a rate of 200-300 cfs for 10 days. Additional releases will continue as farmers call for water. Rio Grande Reservoir will also begin releasing stored irrigation water into the Rio Grande on April 14 for approximately 20 days. The rate of the release will start at 100-150 cfs and increase up to 350-450 cfs. After deliveries are complete, releases will be limited to the natural inflows. As such, boatable flows on the Rio Grande may diminish as early as mid-May.

Entities including Colorado Parks and Wildlife, the San Luis Valley Water Conservancy District, and the Rio Grande Water Conservation District store water in reservoirs in the Upper Rio Grande Basin and call for releases for their operations in accordance with their water rights decrees. 

Where possible, releases by these organizations will be prioritized during hot periods to supplement the natural flow of the Rio Grande and the South Fork of the Rio Grande to reduce high water temperatures to protect the health of fish. Unfortunately, there may not be sufficient water to keep temperatures below thresholds for responsible fishing. As such, anglers are encouraged to check temperature gages and not engage in catch and release fishing if water temperatures reach exceed 70 degrees. Temperature is measured at the 30 Mile Bridge, Wagon Wheel Gap, Del Norte, and South Fork Gages and can be viewed at the Colorado Division of Water Resources’ website (dwr.state.co.us). [ed. emphasis mine]


Platoro Reservoir. Photo credit: Rio de la Vista

Conejos River operations

Platoro Reservoir is passing inflows, which were 10 times higher than average for much of March because of rapid snowmelt. The Conejos Water Conservancy District allocated 6,500 acre-feet of project water to the irrigators. Unfortunately, river flows are currently too low to carry that water to farmers’ headgates and water will not be released unless river flows improve. It is likely that the river will have dry up points below Highway 285. Anglers are encouraged to check temperature gages below Platoro Reservoir and near Mogote before engaging in catch and release fishing.


Links to Stream Gages with Temperature Measurements:

Rio Grande at Thirty Mile Bridge (RIOMILCO):

https://dwr.state.co.us/Tools/Stations/RIOMILCO?params=DISCHRG,WATTEMP

Rio Grande at Wagon Wheel Gap (RIOWAGCO):

https://dwr.state.co.us/Tools/Stations/RIOWAGCO?params=DISCHRG,WATTEMP

Rio Grande at Del Norte (RIODELCO):

https://dwr.state.co.us/Tools/Stations/RIODELCO?params=DISCHRG,WATTEMP

South Fork of the Rio Grande at South Fork (RIOSFKCO):

https://dwr.state.co.us/Tools/Stations/RIOSFKCO?params=DISCHRG,WATTEMP

Conejos River Below Platoro Reservoir (CONPLACO):

https://dwr.state.co.us/Tools/Stations/CONPLACO?params=DISCHRG,WATTEMP

Conejos River Near Mogote:

https://dwr.state.co.us/Tools/Stations/CONMOGCO?params=DISCHRG,WATTEMP


Heather Dutton

Heather Dutton is district manager for the San Luis Valley Water Conservancy District, which provides leadership to the San Luis Valley water community, a forum for learning and development, and the service of well augmentation in five counties in the San Luis Valley. More by Heather Dutton

The Ship Needs a Captain: A call for leadership in the #ColoradoRiver Basin —  Page Buono and Sinjin Eberle (AmericanRivers.org) #COriver #aridification

Banks of Lake Powell, Arizona in March 2026 | Page Buono

Click the link to read the article on the American Rivers website (Page Buono and Sinjin Eberle):

March 18, 2026

The situation is clear: the precipitation outlook in the Colorado River Basin is dire, the river cannot sustain the demands placed on it, and this year we’re likely to face unprecedented management decisions with potentially catastrophic consequences.

Despite decades of warnings and years of negotiations, there remains no clear blueprint for how the West can live with less water. That future is no longer hypothetical—it is already here.

Lake Powell’s drastically low water levels are evident in the discoloration of ancient cliffs that were submerged for decades, often referred to as “the bathtub ring” in March 2026 | Page Buono

We often talk about the Colorado River and drought in ways that can feel removed, impersonal, abstract, and buried in jargon. But beneath the stories, there are real lives, livelihoods, ecosystems, and traditions that make the region what it is, and that are very much at stake. 

West Drought Monitor map April 7, 2026.

On March 3, for example, the US Drought Monitor released their latest report, revealing that “snow water equivalent” is less than 70% of normal across the Central Rockies, and less than 50% in the Four Corners. 

Snow water equivalent is essentially how the water in the snow translates to real, wet water – the kind rivers and people rely on. By some accounts, the prediction for this year’s total is now on par with – and potentially worse than – 2002, which previously held the record for one of the worst water years on the Colorado River. For those who live in the region, the catastrophic wildfires of 2002 are not abstract: the Hayman fire burned for over a month, killed six people, destroyed more than 600 homes, and amounted to estimates of $42 million worth in damages. That same year, Arizona experienced the Rodeo-Chediski fire, which burned nearly half a million acres.

But it isn’t just one fire in one year – throughout the Southwest and in California, regions are experiencing some of the largest, most catastrophic wildfires in history, and they’re occurring much more frequently.

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

Upper #ColoradoRiver Basin States’ Governors Release Statement on Proposed Draw Down of #FlamingGorge and Upper Basin Reservoirs

View below Flaming Gorge Dam from the Green River, eastern Utah. Photo credit: USGS

Click the link to read the release on Governor Polis’ website:

April 9, 2026

Today, Governors Jared Polis (D-Colo.), Mark Gordon (R-Wyo.), Michelle Lujan Grisham (D-N.M.) and Spencer Cox (R-Utah) released a statement on the proposed draw down of Flaming Gorge and other upper basin reservoirs: 

“This is an unprecedented year on the Colorado River, and likely will be one of the worst on record. A dry year like this reminds us of why it is critical that all who rely on this resource learn to live within its means and adapt our uses accordingly. 

The Upper Division States of Colorado, New Mexico, Utah, and Wyoming, are actively and strictly regulating water uses. Because of such diminished runoff, existing state laws in the Upper Division States require water users to face cuts to water rights dating back to the 1800s – these cuts are mandatory, uncompensated, and will have significant impacts on water users, including Upper Basin Tribes, and local economies. 

It is critical that any releases made by the federal government from Flaming Gorge and other upstream reservoirs are in compliance with existing agreements, particularly the 2019 Drought Response Operations Agreement between the Bureau of Reclamation and the Upper Division States and governing law and done for the purpose of protecting Lake Powell. We must have a clear understanding of how these proposed releases will effectively protect elevations at Lake Powell. Once the releases conclude, we expect that all water released from Flaming Gorge and other upstream reservoirs will be fully recovered. 

Further, any releases must be appropriately sized. Years like this one remind us that appropriate water storage helps us survive the dry years, and that we must be prepared not only for this year but future dry years, as well as average years. 

As we continue to comply with commitments to our water users and the Law of River, we recognize the impacts of water shortages and water releases from Upper Basin reservoirs on local communities – not only related to future water supply availability, but also how they affect jobs and local recreational and other economies. We recognize the need to live within the available supply and expect other communities to do so as well.” 

#ColoradoRiver supply forecast melts after March heat wave — Scott Franz (KUNC.org) #COriver #aridification

The Colorado River flows near Hite, Utah on July 4, 2022. The river’s water supply is shrinking, and states are caught in a standoff about how to cut back on demand. Alex Hager/KUNC

Click the link to read the article on the KUNC website (Scott Franz):

April 8, 2026

This story is part of ongoing coverage of the Colorado River, produced by KUNC in Colorado and supported by the Walton Family Foundation. KUNC is solely responsible for its editorial coverage.

Last month’s record breaking heat across the Mountain West led to the worst snowpack on record in Colorado and Utah, along with a significantly downgraded forecast for the upcoming supply of Colorado River water.

Cody Moser with the federal Colorado Basin River Forecast Center said in a monthly briefing Tuesday [April 7, 2026] that just 1.4 million acre feet of Colorado River water is expected to reach Lake Powell through July. That’s less than a quarter of what’s considered normal.

It’s also much lower than the 2.3 million acre feet Moser’s office projected a month ago, before the heat wave in the West melted away an already meager supply of snowpack.

“With record low snow pack, we have well below normal water supply forecasts,“ he said. “In many cases, our April through July (water) volume forecasts rank in the lowest five on record when compared to historical observations.”

The forecast for how much water will reach Flaming Gorge Reservoir also dropped more than 20% since the last monthly projection. Flows for the Yampa River are also projected to be near the record low.

Moser added it’s likely some rivers and streams in western Colorado have already reached their peak runoff for the year.

He said the water supply forecasts could improve if wet conditions arrive, or decline even further if the West remains dry.

The worsening river forecasts arrive as the seven states that use the waterway remain at an impasse this spring over how to share and conserve the water in the future.

Negotiators missed a February deadline to strike a deal but have said in recent weeks their talks are continuing with a focus on a potential short-term plan.

If states can’t reach a deal, the Interior Department is expected to identify its preferred option for how to manage Lake Powell and Lake Mead after the current operating guidelines expire this fall.

Interior Secretary Doug Burgum told Arizona radio station KTAR News this week that the worsening spring runoff conditions are going to “require everybody to dig in and take bigger cuts than they want, and we haven’t reached that spot yet.”

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

Interior secretary says ‘nobody will be happy’ with #ColoradoRiver decision — Tucson.com #COriver #aridification

U.S. Interior Secretary Doug Burgum, center, speaks during a gathering with governors from six states in the Colorado River basin on Friday, Jan. 30, 2026. Photo credit: Lowell Whitman/Department Of Interior

Click the link to read the article on the Tuscon.com website (Tony Davis). Here’s an excerpt:

April 8, 2026

U.S. Interior Secretary Doug Burgum, pressed Monday to spell out how he’ll handle the Colorado River’s water crisis, wouldn’t get specific but said repeatedly that “nobody will be happy” with how his department will split a rapidly dwindling supply of river water among the seven states, including Arizona, that want a piece of it. Speaking at a roundtable in the Tucson area populated by a host of public lands industry leaders and University of Arizona President Suresh Garimella, Burgum pledged to hand down a decision this month on the first of two crucial, divisive issues his office is confronting regarding the river.  That decision will be how much water the Interior Department’s Bureau of Reclamation will release from its upstream reservoirs in the four Upper Colorado River Basin states to head off a potential calamity in which Glen Canyon Dam, forming the boundary between the Upper and Lower Basins, would no longer receive enough water to continue generating electricity that serves customers in seven Western states.

The 100-Year Error: How Selective Science Drained the #ColoradoRiver — Bob Hembree (LakePowellChronicle.com) #COriver #aridification

The white bathtub ring clinging to the sandstone walls of Glen Canyon is more than a marker of a receding lake; it is a physical manifestation of a century-old accounting error. PHOTO BY BOB HEMBREE (MARCH 2019)

Click the link to read the article on the Lake Powell Chronicle website (Bob Hembree):

April 1, 2026

The white bathtub ring clinging to the sandstone walls of Glen Canyon is more than a marker of a receding lake; it is a physical manifestation of a century-old accounting error. For decades, the conventional story of the Colorado River’s decline has been framed as a tragic stroke of bad luck. The narrative, popularized in modern classics like Cadillac Desert, suggests that the framers of the 1922 Colorado River Compact simply did their best with a limited record of “eighteen years of streamflow measurement” taken during an unusually wet “binge.”

However, emerging historical research and systems analysis tell a more complicated and troubling story. In their definitive study, Science Be Dammed, authors Eric Kuhn and John Fleck argue that the crisis we face in 2026 was not an accident of nature but a predictable consequence of “selective science.” The decision-makers of 1922 were not victims of ignorance; they were sophisticated professionals who chose to ignore inconvenient data in favor of a political vision that required the river to be larger than it actually was.

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

The Inconvenient Hydrologist

As the seven basin states gathered at Bishop’s Lodge in Santa Fe to carve up the river, they were joined by Eugene Clyde (E.C.) LaRue, a hydrologist for the U.S. Geological Survey. [Eric Kuhn responding to my X post, “Actually LaRue was never allowed to attend a Commission meeting. He asked, but Hoover said no.] LaRue presented the commissioners with a conclusion that threatened the very foundation of their negotiations. His data, which included early gauge records and historical flood markers, suggested that the river’s long-term average was approximately 15 million acre-feet (maf)

LaRue explicitly warned the commission that the period between 1905 and 1922 was a hydrological anomaly. Had the negotiators included the drier records from the late 1890s, the estimated annual flow would have dropped significantly. As Kuhn and Fleck note, the decision-makers had at their disposal a relatively thorough, almost modern picture of the river’s hydrology. They chose to ignore it because accepting LaRue’s science might have left them with a flow too low to reach the compromises necessary to develop the West.

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

Paper Water and the System Trap

By sidelining LaRue and enshrining a “paper water” figure of 16.4 million acre-feet into the Law of the River, the commissioners fell into a classic “system trap.” They created a legal stock of water rights that far exceeded the river’s physical flow. This inflated number was essential to the “reinforcing loop” of 20th-century growth. It provided the legal certainty needed to secure federal funding for massive infrastructure projects like the Hoover Dam and the Glen Canyon Dam.

This intentional overestimation created a massive “information delay.” For eighty years, the system appeared stable only because the Upper Basin states were slow to develop their shares, allowing their “unused” water to flow downstream. This masked the fundamental deficit, leading to a state of “overshoot” in which the regional economy came to depend on water that did not exist. Professor Rhett Larson describes the resulting legal framework as a system of “calling shotgun” that was excellent for settling a desert but is catastrophic for managing one in a time of scarcity.

The End of the Delay

Today, the “delay” has finally ended, and the “inconvenient science” of 1922 has become the undeniable reality of 2026. The river’s source is being further depleted by “aridification,” a process climate scientist Brad Udall describes as a “sponge above our head” that evaporates moisture before it can reach the streamflow. We are now witnessing the collision of a 100-year-old legal fiction with a 21st-century climate reality.

The current impasse between the Upper and Lower Basins is a symptom of “policy resistance,” where every actor is incentivized to protect their “paper” share even as the “wet” water disappears. As Professor Andrea Gerlak observes, if a system has 25 years to produce an agreement and fails, there is likely something fundamentally wrong with the system itself. Solving the crisis at Lake Powell will require more than engineering; it will require a paradigm shift that finally aligns our laws with the river’s actual physical limits.

The next Aspinall Unit Coordination Meeting for the Aspinall Unit & #GunnisonRiver will be heldThursday, April 23rd, 2026 at 1:00 pm — Andrew Limbach (USBR) 

Aspinall Unit dams

From email from Reclamation (Andrew Limbach):

April 7, 2026

The next Aspinall Unit Coordination Meeting for the Aspinall Unit & Gunnison River will be heldThursday, April 23rd, 2026 at 1:00 pm. 

This meeting will be held virtually via Microsoft Teams. There will not be an in-person meeting location for this meeting. The link to the Teams meeting is below.

Reclamation conducts Public Operations Meeting three times per year to gather input for determining upcoming operations for the Aspinall Unit & Gunnison River. The meeting agenda will include updates on current snowpack, forecasts for spring runoff conditions and spring peak operations, the weather outlook, and planned operations for the remainder of the year. 

Contact Andrew Limbach (alimbach@usbr.gov or 970-248-0644) for more information regarding Aspinall operations or the Operation Group meeting.

A Drying #ColoradoRiver Threatens Imperial Valley’s Future: Declining flows and the warming climate imperil farms, green energy projects and the economy of one of #California’s poorest counties — Capitol & Main #COriver #aridification

The All American Canal, the largest diversion on the Colorado River, passes through Winterhaven, CA on its way to the Imperial Valley. The Colorado River is seen flowing next to it.

April 2, 2026

In the southeast corner of California, 300-foot-tall sand dunes rise from a sunbaked landscape dotted with ocotillo and creosote bushes. Summer temperatures here regularly exceed 110 degrees, and annual rainfall is comparable to that of the Sahara Desert. Despite its unforgiving terrain, more than 180,000 residents live in Imperial County, one of the country’s most productive agricultural regions and more recently a magnet for data center development and lithium extraction proposals. This has all been made possible by turn-of-the-20th century canals that carve up the region, supplying it with more than a million gallons of Colorado River water every minute. 

“We’ve often called it the lifeblood of Imperial Valley,” said Robert Schettler, a spokesperson for Imperial Irrigation District, the area’s public utility, which manages the region’s over 3,000 miles of drains and canals. “If something were to happen to that river, we would all have to pack up and leave.”

Something is happening to the Colorado River. Over the past century, its average water supply has fallen by nearly a third due to prolonged drought and climate change. Experts predict that decline will continue, threatening cities, tribes and farms that depend on the river’s flow, from Wyoming, Utah, Colorado and New Mexico to Arizona, Nevada and Northern Mexico.  Most of the Colorado River’s water starts as snowpack in the Rocky Mountains, but after the American West experienced the warmest winter ever recorded, snow levels are now at historic lows, prompting experts to warn that 2026 may be one of the river’s driest years yet. 

That could spell disaster for Imperial County, whose harsh desert landscape of windblown sand and rugged burnt-orange mountains was transformed more than a century ago into productive, gridded farmland dotted with small cities such as Brawley, El Centro and Calexico…Imperial Valley’s agricultural industry consumes by far the largest share of water in the region, about 97% of the 3.1 million acre-feet managed by the Imperial Irrigation District every year…Those ambitious and largely successful conservation efforts have come at a cost. Much of the water used by farmers historically flowed into the nearby Salton Sea, but as farmers have reduced their water use, less runoff has reached the man-made lake, accelerating an existing environmental crisis Over the last three decades, the Salton Sea has shrunk by more than 60 square miles, exposing a dry lakebed laden with pesticides, particulate matter and heavy metals. Those contaminants are carried as dust through the air into nearby communities, contributing to a childhood asthma rate triple that of the national average. Now, farmers such as Brian Strahm, whose family has been growing crops in the area for four generations, are concerned they may have to decrease their water use further. That may prove difficult since farmers have already put in place many efficiency measures, Strahm said…Farmers say cuts could seriously harm the area’s already struggling economy. In addition to being the county with the highest percentage of Latinos in California, Imperial has among the highest unemployment rates of any county in the country, at nearly 19%. For those who do find work, the agricultural industry offers a lifeline, accounting for one out of every six jobs in the region. 

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

#Colorado Must Adapt Its Water Rules for a Hotter, Drier Future — David Leach #ColoradoRiver #COriver #aridification

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

April 5, 2026

by David Leach

Coloradans often hear that the Colorado River crisis is happening somewhere else. Headlines focus on Lake Mead, Lake Powell, and the Lower Basin, while Colorado is portrayed as a responsible headwaters state doing its part. Yet that narrative misses a deeper truth. The Colorado River crisis is not only about drought or downstream shortages. It is also about how the river is managed. In that sense, Colorado shares responsibility with every basin state.

Colorado’s water system is built on ‘prior appropriation’. The rule is simple: “first in time, first in right.” The earliest water users receive priority when supplies run low. This framework helped farmers, cities, and industries expand across the West during the nineteenth and twentieth centuries, creating stability in a region where water determines survival.

However, the system was designed for a different climate and a by-gone West. It also encouraged states and water users to claim more water than the river could supply, contributing to the overallocation of the Colorado River. Legal analyses of the Law of the River show that the basin was effectively overburdened by water claims decades before climate change began reducing flows.

Today, climate change is altering the river itself. Scientists estimate that warming temperatures have already reduced Colorado River flows by roughly 20 percent. Federal water managers warn that declines could continue as temperatures rise. In a river system that is already legally overcommitted, treating water rights as fixed privileges can deepen instability rather than prevent it.

Colorado sits at the center of this challenge. As the largest contributor of water in the Upper Basin, the state must balance many competing demands. Front Range cities continue to grow. Western Slope agriculture depends on reliable irrigation. Rivers and aquatic ecosystems are under stress. Yet much of Colorado’s water policy still assumes shortages are temporary and that legal priority alone will determine who receives water. That mindset often encourages defensive politics rather than shared problem-solving.

Conflicts between upstream and downstream states are often described as unavoidable. In reality, much of the tension stems from the priorities of management. Upper Basin states emphasize uncertainty about future river flows, while Lower Basin states focus on delivery obligations and infrastructure investments, according to recent reports on Colorado River governance. Each group is acting logically within the current system. The problem is that the system frequently rewards delay and legal conflict rather than cooperation, as researchers studying collaborative governance in the basin have found.

Colorado has an opportunity to change that pattern. One promising approach is collaborative adaptive management. This framework begins with a simple idea: uncertainty is normal in complex systems. Instead of assuming managers already know the right solution, adaptive management relies on monitoring conditions, learning from outcomes, and adjusting policies over time. With collaboration of states, tribes, farmers, cities, and environmental groups conflict can be reduced and management decisions can improve.

Some elements of this approach already exist in Colorado, including experimental reservoir operations and voluntary conservation programs. However, research on collaborative drought science planning in the Colorado River Basin shows that these efforts remain limited and politically fragile.

Equity must also be part of Colorado’s leadership. For decades, Tribal nations and many rural communities have carried the environmental costs of water development while urban growth captured much of the benefit, a pattern highlighted in research on environmental justice and Indigenous governance. Tribal nations, many of which hold some of the most senior water rights in the basin, remain underrepresented in major water decisions. Adaptive governance recognizes that whose knowledge it is that counts, matters. Incorporating Indigenous knowledge, local experience, and community-based monitoring can strengthen decisions and build trust in governance. Research shows that when affected communities help shape policies, those policies are more likely to be trusted, followed, and sustained over time.

Importantly, collaborative management does not mean abandoning Colorado water law or taking away private rights. Instead, it means updating water governance so users can share risk and adapt together as conditions change. The alternative – waiting for wetter years or relying on courts to resolve disputes – ignores both climate science and political reality. Climate projections from the Intergovernmental Panel on Climate Change indicate that the American Southwest will likely remain hotter and drier for decades. Planning for a return to twentieth-century river flows is increasingly unrealistic.

Critics argue that collaboration takes too long when the crisis is already severe. Colorado has already tried temporary agreements, emergency negotiations, and federal pressure. Those approaches have not produced lasting solutions. Short-term deals may stabilize reservoirs for a season, but they do little to address the deeper management problems driving the crisis. Without stronger cooperation, the basin risks repeating the same cycle of shortage and conflict.

Colorado has long prided itself on practical problem-solving and environmental leadership. The state now has an opportunity to apply those values to its most important river. Policymakers should strengthen collaborative water governance, ensure meaningful Tribal participation, and support conservation policies that reward flexibility rather than litigation.

Coloradans also have a role to play. Public participation in basin planning, engagement with watershed organizations, and pressure on elected officials can help shift water policy toward long-term climate adaptation rather than short-term crisis response.

The Colorado River begins in our mountains. Leadership today means recognizing that rules built for a wetter past may no longer work in a hotter future – and choosing cooperation before the river forces the decision for us.


References

Anderson, Patrick J., Jeanne E. Godaire, Daniel K. Jones, William J. Andrews, Alicia A. Torregrosa, Meghan T. Bell, JoAnn M. Holloway, et al. 2025. “Collaborative Drought Science Planning in the Colorado River Basin.” U.S. Geological Survey Open-File Report 2025-1041https://doi.org/10.3133/ofr20251041.

Birnbaum, Simon. 2016. “Environmental Co-governance, Legitimacy, and the Quest for Compliance: When and Why Is Stakeholder Participation Desirable?”. Journal of Environmental Policy & Planning, 18, no. 3, 306–323.https://doi.org/10.1080/1523908X.2015.1077440

Ghaeminasab, Fateme. 2025. “The Legal Battle Over the Colorado River Compact: Revisiting Water Allocation Agreements.” Journal of Taxation and Regulatory Framework. https://lawjournals.celnet.in/index.php/jtrf/article/view/1735.

Hite, Kristen, Pervaze A. Sheikh, and Charles V. Stern. 2025. “Management of the Colorado River: Water Allocations, Drought, and the Federal Role”. Congressional Research Service Report R45546.https://www.congress.gov/crs-product/R45546

Holling, C. S. 1978. Adaptive Environmental Assessment and Management. New York: Wiley.

IPCC. 2023. AR6 Synthesis Report. Intergovernmental Panel on Climate Change.https://www.ipcc.ch/report/ar6/syr/downloads/report/IPCC_AR6_SYR_FullVolume.pdf.

Kuhn, Eric. 2024. “The Risks and Potential Impacts of a Colorado River Compact Curtailment on Colorado River In-Basin and Transmountain Water Rights Within Colorado.” Colorado Environmental Law Journal, 35.https://scholar.law.colorado.edu/celj/vol35/iss2/4.

Macdonnell, Lawrence. 2020. “Tribal Water Rights in the Colorado River Basin”. Colorado River Research Group.https://www.researchgate.net/publication/339080311_Tribal_Water_Rights_in_the_Colorado_River_Basin.

Slosson, Mary. 2024. “Force Majeure and the Law of the Colorado River: The Confluence of Climate Change, Contracts, and the Constitution.” University of Colorado Law Review, 95.https://lawreview.colorado.edu/print/volume-95/force-majeure-and-the-law-of-the-colorado-river-the-confluence-of-climate-change-contracts-and-the-constitution/.

Sullivan, Abigail, Dave D. White, and Michael Hanemann. 2019. “Designing Collaborative Governance: Insights from the Drought Contingency Planning Process for the Lower Colorado River Basin.” Environmental Science & Policy, 91: 39-49. https://doi.org/10.1016/j.envsci.2018.10.011.

Udall, Bradley and Overpeck, Jonathan. 2017. “The twenty-first century Colorado River hot drought and implications for the future”. Water Resources Research, 53, no. 3.https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016WR019638.

U.S. Bureau of Reclamation. 2023. Colorado River Basin Water Supply and Demand Study.https://www.fws.gov/project/colorado-river-basin-water-study.

Williams, Byron K., Robert C. Szaro, and Carl D. Shapiro. 2009. Adaptive Management Technical Guide.https://www.doi.gov/sites/doi.gov/files/migrated/ppa/upload/TechGuide.pdf.

Whyte, Kyle P. 2018. “Settler Colonialism, Ecology, and Environmental Injustice”. Ecology and Society, 23, no. 2.https://www.researchgate.net/publication/327455189_Settler_Colonialism_Ecology_and_Environmental_Injustice.


David Leach.

David is a Colorado Certified Water Professional and environmental scientist dedicated to protecting aquatic systems through rigorous data analysis, public service, and responsible resource management. He holds a bachelors degree in Biology from Western Colorado University and will graduate soon from the University of Denver with a Masters Degree in Environmental Policy and Management.

“The Situation is Dire”– Becky Mitchell, #Colorado’s Upper #ColoradoRiver Commissioner #COriver #aridification

Click the link to read the article on Ken’s Substack (Ken Neubecker):

March 27, 2026

The February 14 deadline for the seven Colorado River Basin States to come up with an agreement on future management of the river is long gone, and still no agreement in sight. The deadline for submitting comments on the Bureau of Reclamations Draft Environmental Impact Statement (DEIS) is also past. Reclamation didn’t have a “preferred alternative”, which is not normal. They were hoping the States would have an agreement so that could become the preferred alternative. So they are left with their suite of six alternatives. All six are fraught with what Reclamation calls “decision making under deep uncertainty” (DMDU, they love acronyms).

That is an understatement.

No one seems to be very happy with any single proposed alternative. Some are calling for a new DEIS, or at least a Supplemental DEIS. This would only push any deadline further down the road. Reclamation is caught between a rock and a hard place.

The only real alternatives that they can implement without full approval by the States are No Action and the Basic Coordination Alternative. Both would be disastrous. They would simply be going back to how things were done prior to the 2007 Interim Guidelines and even earlier policies, none of which reflect the needs of the Colorado River we have today.

Westwide SNOTEL basin-filled map April 4, 2026.

Adding to that is the very dry record low snowpack in the Rockies. This annual winter snowpack is the ultimate water storage reservoir for the entire basin, from Pinedale, Wyoming, to Yuma, Arizona. It is what puts water into the two great reservoirs, Lakes Powell and Mead, that the Lower Basin desert states of California, Arizona and Nevada depend on. It is the only real reservoir that the needs of the arid Upper Basin states, Colorado, Utah, New Mexico and Wyoming depend on. This year that snowpack reservoir is as low as it has ever been, even eclipsing the former record year of 2002 when all this mega-drought started. The recent heat dome setting up over the Four Corners area is melting and sublimating what little snowpack there is fast.

Lakes Powell and Mead are already at very low levels, and the 1.7 maf projected inflow from spring runoff is looking smaller every day. Reclamation predicts that the water level in Lake Powell will drop to a point where no hydropower can be generated, power pool, by as soon as late July or at least in December. That, in effect, could be dead pool, with very limited releases from the lower “river outlet” tunnels. In effect, the flows from Lake Powell will become run of the river, what comes in is what goes out. No more storage for expected water deliveries downstream except what they might risk in lowering Lake Mead even more.

Needless to say this has sparked a war of words between the Upper and Lower Basins, with the Lower Basin being particularly vitriolic. As the February 14 deadline passed, JB Hamby of California declared “The 1922 Colorado River Compact requires the Upper Basin to deliver an average of 8.25 million acre-feet (maf) annually to the Lower Basin and Mexico. That delivery obligation is fixed in law, even if the river produces less water.” Arizona has gone even further, declaring in TV ads that the water delivery is not only an obligation, but a “guarantee” for delivery.

Huh??? Fixed in law and a guarantee? The reality of the river disagrees. The requirements of the Compact are, yes, written in law. On paper. It is “paper water”, not real, or “wet” water. Colorado’s commissioner Becky Mitchell was more to the point, if less vitriolic, “We are being asked to solve a problem we didn’t create, with water we do not have.” At least someone understands the reality of the situation.

John Wesley Powell, the hero of the Colorado River was invited as the honored guest and keynote speaker at the second International Irrigation Congress, held in Los Angeles in 1893. He was held in high regard by the many boosters, speculators and people hoping to cash in with irrigated farms all across the Colorado River basin. After listening to what they were saying, Powell pocketed his prepared remarks and said,

“When all the rivers are used, when all the creeks in the ravines, when all the brooks, when all the springs are used, when all the canyon waters are taken up, when all the artesian waters are taken up, when all the wells are sunk or dug that can be dug in all this arid region, there is still not sufficient water to irrigate all this arid region.”

The delegates didn’t want to hear that. As they booed him off the stage he added,

“I tell you gentlemen that you are piling up a heritage of conflict and litigation over water rights for there is not sufficient water to supply the land.”

Powell was right, but the boosters didn’t listen. Many still aren’t listening. Agricultural dreams have faded and new dreams of housing developments and data centers are taking their place. The boosters, in both Basins, are still booing reality off the stage. Dreams continue to grow as the river continues to shrink.

I read of fears that the Upper Basin will take advantage of Lower Basin cuts by taking more themselves. Really? From where? That vast winter snowpack reservoir that is expected to “guarantee” so much water for the Lower Basin, to refill Powell and Mead, is the same shrinking reservoir that the Upper Basin depends on. Upper Basin diversions are being curtailed every year, not expanded. There isn’t enough water. The Upper Colorado River Commission’s “Amended 2016 Upper Division States Depletion Demand Schedule”, published in June 2022, was used in BOR’s modeling of Upper Basin demands, but the optimistic projections of that report have never born fruit. The report is a projection of potential future depletions from the Upper Colorado River, but they are just that, projections. And relatively modest ones at that. The report begins with a resolution of the Commission that states,

WHEREAS Depletion Demand Schedules issued by the Commission are not a prediction of future water use or depletions. The Depletion Demand Schedules are estimates that presume the continuation of the observed historically available supply and other demand drivers used for planning purposes and are useful for modeling purposes.

It is simply and estimate based on “observed historically available supply”. Observation and history have made some changes to any anticipated future depletions. The report cites 5.7 maf as the current historical use as of 2022, with potential for increased depletions up to 5.8 maf in 2020 and 6.6 maf by 2070. In reality the annual depletion has dropped to 4 maf or less. With continued aridification and dwindling snowpack Upper Basin depletions will likely stagnate, if not decline. That is just the reality.

Under Colorado law, and constitution, the right to divert water to a beneficial use “shall never be denied”. What that means, as I stated in the previous post, is that anyone can dig a ditch or throw a small pump into any stream and divert water. New applications for water rights are filed every month with the Water Courts, and their decrees will likely be granted. That is again, all on paper. The reality is they probably won’t get much if any water. When the river is flowing high in the spring it is a “free river”, meaning anyone can stick in their straw for a drink. But as soon as the first senior call is placed all that stops, and senior calls are happening earlier and earlier every year. And the local Water Commissioners, the ones who can shut down diversions, are getting busier.

The 1922 Compact has a fairly senior right on all streams and rivers in the Upper Basin. So far, the non-depletion requirement for flows averaging 75 maf over a ten year running average hasn’t been breached. Lake Powell will probably hit power pool or worse before then.

The difference between the demands, hopes, and fantasies of paper water and the hard reality of actual wet water are growing starker every winter and have been since the three giant reservoirs, Powell, Mead and the winter snowpack, have shrunk over the past 25 years. Nature doesn’t care much about paper, reports, lawyers or the dreams of boosters past and present. She always wins in the end.

And as Becky Mitchell, said, litigation won’t create any new water.

A correction/addition to my previous post about misunderstandings on the Colorado River

I need to make a correction on my previous post. The three large Upper Basin’s reservoirs, Flaming Gorge, Blue Mesa and Navajo do provide some water for Upper Basin use, especially Navajo, which provides water to the San Juan-Chama diversion to the Rio Grande basin and Albuquerque. It supplies on average 91 kaf of diverted water. It is expected that there will be no diversion this year. Navajo also provides water for Tribal use to the Navaho and Jicarilla Apachie. Downstream flows from Flaming Gorge, the largest of the three can provide smaller amounts for hay fields in Browns Park and the melons in Green River, but that’s pretty small too. Blue Mesa releases can benefit the Gunnison Tunnel diversions and Redlands downstream, but both are well senior to the Compact.

I knew better.

The main storage of the three reservoirs is still primarily as that Compact compliance savings account, and they will be called upon soon to bolster the levels of Lake Powell, where the inflow from runoff projection is dropping below 2 maf. If things keep going like this for another few weeks it will likely be lower.

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

Hot, Dry Weather Continues in #Colorado Mountains and Plains — Northern Water #snowpack #runoff

Snowpack or lack thereof 2026. Photo credit: Northern Water

Click the link to read the release on the Northern Water website:

March 31, 2026

The record-breaking hot and dry winter and early spring has continued through March in Colorado’s mountains and plains. Snow gauges and weather stations throughout Northern Water’s collection and distribution areas have collected data showing the lack of precipitation in the region this year. 

On April 9, the Northern Water Board of Directors will use the data collected this year and more to determine the annual quota for allottees of Colorado-Big Thompson Project water. Unlike many irrigation systems, the C-BT Project is designed to provide water to supplement the native supplies available in a given year, using water collected in previous seasons. If there is a bright spot this season, it’s that C-BT Project reserves are above their average levels over the life of the project for this time of year. 

If you would like to provide comment on the quota send an email to quota@northernwater.org or offer a comment at the April 9 Board meeting. 

Colorado-Big Thompson Project map. Courtesy of Northern Water.

Clear Creek Reservoir boat ramp remains closed, camping pauses for dam improvements — Dean Miller (Colorado Parks and Wildlife)

Anglers are welcome at Clear Creek Reservoir State Wildlife Area, Chaffee County as Pueblo Water conducts improvements on the dam beginning April 6. Camping will pause as a safety precaution during maintenance activity and the boat ramp remains closed for a ramp extension project. CPW Photo/Zachary Baker

Click the link to read the release on the Colorado Parks and Wildlife website (Dean Miller):

April 3, 2026 GRANITE, Colo. – The Clear Creek Reservoir State Wildlife Area boat ramp remains closed through the 2026 season and the campground closes April 6 as dam improvements move forward. The reservoir remains open to anglers on shore and in hand-launched watercraft.Motorized boat launches are paused during the 2026 season as Pueblo Water lowers reservoir levels for work to take place. Colorado Parks and Wildlife is using the closure period to extend the boat ramp for improved low-water access and to complete campground maintenance and improvements.Heavy equipment is expected throughout the campground area, and with just one access road, the campground will close for public safety. Limited runoff and poor snowpack in the Upper Arkansas Basin also accelerated the repair timeline, prompting Pueblo Water to move forward with the project in 2026 rather than delay it. The boat ramp is anticipated to reopen for the full 2027 boating season.Hand-launched watercraft are permitted from shore but must comply with aquatic nuisance species requirements and cannot have motors of any kind. Anglers should expect changing shoreline conditions as reservoir levels drop for dam work. Mud and silt may make access difficult at times.“Clear Creek Reservoir is an important fishing destination in northern Chaffee County, and while dam improvements and low water conditions limit access this year, anglers still have opportunities to fish from shore or from hand-launched vessels,” said Zachary Baker, CPW assistant area wildlife manager. “The remaining water will continue to support the fishery and more than 20,000 tiger trout fingerlings were stocked there on Thursday.”Signs will alert visitors to the boat ramp closure and ramp access gates are locked. The Colorado Trail remains open west of the campground and a vault toilet remains open. The region offers additional boating, fishing and camping opportunities on nearby public lands.The wildlife area remains closed to non-hunting and non-fishing activities. Visitors ages 16 and older must have a valid hunting or fishing license or a State Wildlife Area pass.Pueblo Water owns Clear Creek Reservoir and the dam infrastructure, and CPW manages recreation and the campground through a lease.

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Clear creek reservoir. Photo credit: Colorado Parks and Wildlife
Clear creek reservoir. Photo credit: Colorado Parks and Wildlife
Photo credit: Colorado Parks and Wildlife