Part III: #ColoradoRiver Compact curtailment — Allen Best (@BigPivots) #COriver #aridfication

Lake Powell has been about a quarter-full. The snowpack looks strong now, but it’s anybody’s guess whether there will be enough runoff come April and May to substantially augment the reservoir. May 2022 photo/Allen Best

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

October 24, 2024

Colorado River Basin states have scaled back their demands on the river. But agreement about solutions proportionate to the challenge remains distant as the 2025 deadline nears.

The story so far: Andy Mueller, the manager of the Colorado River District, the lead water policy body for 15 counties on the Western Slope of Colorado, used his organization’s annual seminar this year to call for the state to begin planning for potential curtailments of diversions. The river has delivered far less water in the 21st century than was assumed by delegates of the seven basin states when they drew up the Colorado River Compact in 1922. Might higher flows resume? Very unlikely, given what we know about climate change. See Part I of the series and Part II.

In 2009, I wrote a story for a magazine  about the possible need for curtailment of water diversions in Colorado because of the Colorado River Compact. It may have been the first such story in the popular press, but even in 1951 a legal advisor delivered a memo to state officials on this topic. For a sorting through of the legal issues published in 2012, see: “Does the Upper Basin have a Delivery Obligation or an Obligation Not to Deplete the Flow of the Colorado River at Lee Ferry?”

“Having a state plan for compact curtailment has been on the table for what seems like forever, likely 2005 to 2007,” said Ken Neubecker. Now semi-retired, he has been carefully watching Colorado River affairs for several decades and has represented several organizations at different times.

Why hasn’t Colorado moved forward with this planning? When I called him to glean his insights, Neubecker shared that he believes it’s because such planning encounters a legal and political minefield.

“It’s not as simple as pre-1922 rights are protected and post-1922 rights are going to be subject to curtailment based on the existing prior appropriation system.”

Denver Water’s Moffat Tunnel diversion from the Fraser River to Boulder Creek. Most of water diverted to Colorado’s Front Range cities from Western Slope rivers and creeks have legal rights junior to the Colorado River compact. Photo/Allen Best

Front Range municipal water providers and many of Colorado’s agriculture diversions are post-1922 compact. And so are some agricultural rights on the Western Slope.

“I think everybody thinks that well, we’re on the slow-moving train and the cliff is getting closer but it’s not close enough – and there are other things that we can do to slow the train down.”

Taylor Hawes, Colorado River Program director for the Nature Conservancy via Water Education Colorado.

Taylor Hawes, who has been monitoring Colorado River affairs for 27 years, now on behalf of The Nature Conservancy, suspects that Colorado doesn’t want to show its legal hand or even admit the potential need to curtail water use in Colorado. She contends that planning will ultimately provide far more value.

“The first rule you learn in working with water is that users want certainty. Planning is something we do in every aspect of our lives, and planning is typically considered smart. It need not be scary,” she told Big Pivots. “We have all learned to plan for the worst and hope for the best.”

Colorado can start by creating a task force or some other extension of the state engineer’s office to begin exploring the mechanisms and pathways that will deliver the certainty.

“We don’t have to have all the answers now,” Hawes said. “And just because you start the process for exploring the mechanism to administer compact compliance rules doesn’t mean you implement them. It will give people an understanding of what to expect, how the state is thinking about it.”

Rio Grande near Monte Vista. Meeting Colorado’s commitments that are specified in the compact governing the Rio Grande requires constant juggling of diversions. Photo/Allen Best

Compacts have forced Colorado to curtail diversions in three other river basins: the Arkansas, Republican and Rio Grande. The Rio Grande offers a graphic example of curtailment of water use as necessary to meet compact obligations on a week-by-week basis.

The Republican River case is a more drawn-out process with a longer timeline and a 2030 deadline. In both places, farmers are being paid to remove their land from irrigation. The Colorado General Assembly this year awarded $30 million each to the two basins to bolster funding for compensation.

A study commissioned by the Nature Conservancy that involved interviews with water managers and others in those river basins had this takeaway message: “the longer (that) actions are delayed to address compact compliance, the less ability local water users have to tailor compliance-related measures to local conditions and needs and reduce their adverse impacts.”

In the Arkansas Basin, Colorado had to pay $30 million and water available to irrigators was reduced by one third.

“That’s the first lesson in how not to do compact compliance: do not wait to be sued because (then you lose) the flexibility to do stuff the right way,” said one unidentified water manager along the Arkansas River.

Neubecker points to another basin, the South Platte. Even in 1967, Colorado legislation recognized a connection between water drawn from wells along the river and flows within the river. The 2002 drought forced the issue, causing Hal Simpson, then the state engineer, to curtail well pumping, creating much anguish.

Ken Neubecker via LinkedIn

Creating a curtailment plan won’t be easy, Neubecker warns. “It could easily take 10 years. ’Look how long it took to create the Colorado Water Plan. It took a couple years and then we had an update five years later. And that was easy compared to this.”

All available evidence suggests the Colorado River Basin states are nowhere near agreement.

In August, Tom Wilmoth provided a perspective from Arizona in a guest opinion published by The Hill under the title of “Time is running out to solve the Colorado River crisis.” As an attorney he has worked for both the Arizona water agency and the Bureau of Reclamation before helping form a law firm in 2008.

“It has taken 24 years for the problem to crystalize, but less than 24 months remain to develop a solution,” he wrote. “Yet there appears to be little urgency in today’s discussion among the Colorado River Basin’s key players.”

Wilmoth said ”Deferring hard conversations today increases the risk of litigation later.” He, like all others, sees a reasonable chance it would end up before the Supreme Court – with the risk of the justices appointing a special master to adjudicate the conflict. “Its recent tendency has been to appoint individuals lacking in subject matter expertise, a troubling prospect given the complex issues at play.”

The area around Yuma, Ariz., and California’s Imperial Valley provide roughly 95% of the vegetables available at grocery stores in the United States during winter months. February 2017 photo/Allen Best

Monitoring the conversations from Southwest Colorado, Rod Proffitt sees Mueller trying to prepare people in the River District for the challenges ahead.

“I think he has tried to scare people. He is trying to get them prepared to make some sacrifices, and limiting growth is a sacrifice.”

Proffitt is a director of the Pagosa Springs-based San Juan Water Conservancy District.

A semi-retired water attorney, Proffitt is also a director of Big Pivots, a 501-c-3 non-profit.

Make no mistake, says Proffitt, more cuts in use must be made – and they need to be shared, both in the lower basin and in the upper basin. What those cuts need to be, he isn’t sure. Nor do they necessarily need to be the same.

For example, he can imagine cuts that are triggered by lowering reservoir levels. At a certain point, lower basins must reduce their use by X amount and upper basin states by Y amount.

The federal government has mostly offered carrots to the states to reduce consumption, a recognition of the river’s average 12.4 million acre-feet flows, far short of the flows assumed by the compact. It also has sticks, particularly regarding lower-basin use, but has mostly avoided using its authority. Instead, the lower-basin has reduced use voluntarily, if aided by the federal subsidies.

The Inflation Reduction Act and the Bipartisan Infrastructure Act, have yielded a river of money for projects in the West that broadly seek to improve resiliency in the face of drought and climate change. The seeds have been planted in many places. For example, a recent round of funding produced up to $233 million for the Gila River Indian Community in Arizona for water conservation efforts.

The federal government has also offered incentives to reduce consumption in the upper basin. The System Conservation Pilot Program ran from 2015 to 2018. The 2024 program was funded with $30 million through the Inflation Reduction Act and had hopes for conserving about 66,400 acre-feet.

The federal government, through the Bureau of Reclamation, has clear authority to declared water shortages in the lower basin. It has warned that three million acre-feet less water must be used. The lower-basin argues that the upper basin should share in some of this burden.

Grand Junction has a maze of irrigation canals but the municipal water utility gets water from a creek that flows from the Grand Mesa. Some diversions in Colordo are pre-compact, but many others occurred after 1922. This is a scene from Grand Junction. Photo/Allen Best

Should the federal government get out the stick?

“Nobody wants to apply vinegar this close to the November election,” said James Eklund when we talked in late September about the stalemate on the river.

Eklund has had a long association with the Colorado River. His own family homesteaded on the Western Slope near Colbran in the 1880s and the ranch is still in the family. He lives in Denver, though, and was an assistant attorney in the state attorney general’s office in 2009, when I wrote my first story. He later directed the Colorado Water Conservation Board, the lead agency for state policy.

For the last few years Eklund has been on his own, more or less, a water attorney now working for Sherman and Howard, a leading Denver firm, while trying to represent clients with diverse agriculture water rights.

“Litigation is a failure,” he said when I asked him about Mueller’s remarks in Grand Junction. He contends the upper basin must come to the table with more ideas about how to solve the structural imbalance between supplies and demands than it has so far. And this, he said, will involves some pain.

Creating compact curtailment will involve rule-making, though, and that will take time and effort. Echoing Denver Water’s position, he says it will divert Colorado from the more important and immediate work of helping negotiate solutions.

Eklund suspects an ulterior motive of the River District: to get the state to play its cards on what curtailment could look like so that it can begin jockeying for position.

On the other hand, he believes cutbacks should be premised on two bedrock principles: voluntary and compensated. But Eklund also says that if the situation becomes desperate enough, water will continue to find its way to cities. “The Front Range is not going to bend its knee to alfalfa plants. It’s not going to do it.”

And then, Colorado’s Constitution allows municipalities to take water. It requires compensation.

The Bureau of Reclamation has said the same thing in the lower basin. Las Vegas and other cities will not be allowed to dry up.

The Bureau of Reclamation has said that Las Vegas and other cities will not be cut off from water in the Colordo River. . Photo/Allen Best

But what if compact curtailment means making the hard decision about who doesn’t get water and does not get compensated – people like the farmers near Fort Morgan who, in 2002, had to cease pumping water?

Neubecker characterizes the position of Colorado as one of conflict avoidance. Look at where it got Neville Chamberlain, the British prime minster, in his negotiations with Hitler.

What Colorado must do is prepare for the worst-case scenario. “It’s a doomsday plan,” Neubecker says of compact curtailment. “Make the plan, involve all the people who are going to be effected by the plan, and put it on the shelf – but not too far back on the shelf, just in case you need it”

For now, water levels in the two big reservoirs are holding more or less steady.

Another winter like 2002 could trigger renewed clanging of alarm bells.

John Fleck at Morelos Dam, at start of pulse flow, used 4/4/14 as my new twitter avatar

In New Mexico, Fleck, the author, who also monitors Colorado River matters at his Inkstain blog, rejects the metaphor of the Titanic or the idea that conflict is inevitable. In 2002, California was still using 5.1 million acre-feet from the Colorado River, both for agriculture and to supply the metropolitan areas of Southern California. This was well above the state’s apportionment of 4.4 million acre-feet. “The rhetoric was that it will be a disaster to California’s economy” to return to the allocated flows.

California eventually did cut back and it has done just fine. “Everybody would prefer not to do the adaptation, but they have done it just fine. We see that over and over again in community responses to drought in the Western United States,” he said.

Lake Powell currently has filled to 40% of capacity, a marked improvement from February 2023, when the reservoir had fallen to 22% of capacity. Mead is at 36% of capacity. The situation is not as tense as it was two years ago. That could change in the blink of another hot, dry runoff like that in 2002.

Figure 2. Graph showing reservoir storage between 1 January 2023 and 15 October 2024, highlighting the amount of reservoir recovery during each snowmelt season and the amount of reservoir drawdown during intervening periods. Credit: Jack Schmidt/Center for Colorado River Studies

Investing $1.8 billion into our water supply: How @DenverWater is building a strong, resilient water system for the future — News on Tap

Click the link to read the article on the Denver Water website (Cathy Proctor and Jay Adams):

October 23, 2024

Preparing a water system to meet future challenges means investing in a flexible, resilient operation that’s ready for just about anything — such as a warming climate, pandemics, population growth, periodic droughts, competition for water resources, security threats and changing regulatory environments.

From meeting day-to-day challenges to addressing long-range issues, Denver Water is building and maintaining just such a system, one that stretches from the mountains to homes and businesses across the Denver metro area.

The goal: Ensuring a clean, safe, reliable water supply for 1.5 million people, about 25% of Colorado’s population, now and in the future.

To continue meeting that goal, Denver Water expects to invest about $1.8 billion into its water system during the next 10 years, from large projects to regular inspection and maintenance programs designed to ensure the system is flexible, resilient and efficient.


Read how Denver Water customers are investing in their water system.



In addition to rates paid by customers, funding for Denver Water’s infrastructure projects, day-to-day operations and emergency expenses, like water main breaks, comes from bond sales, cash reserves, hydropower sales, grants, federal funding and fees paid when new homes and buildings are connected to the system. The utility does not make a profit or receive tax dollars. 

In addition, major credit rating agencies recently confirmed Denver Water’s triple-A credit rating, the highest possible, citing the utility’s track record of strong financial management.

Here’s an overview of some of Denver Water’s recently completed and ongoing work: 

Northwater Treatment Plant

Denver Water in 2024 celebrated the completion of the new, state-of-the-art Northwater Treatment Plant next to Ralston Reservoir north of Golden. The new treatment plant was completed on schedule and under budget.

The treatment plant can clean up to 75 million gallons of water per day and the plant’s design left room for the plant to be expanded to clean up to 150 million gallons of water per day in the future as needed.

A major feature of the site visible from Highway 93 is the round, concrete tops of two giant water storage tanks. Most of the two tanks are buried underground; each tank is capable of holding 10 million gallons of clean, safe drinking water. 

The plant is a major part of Denver Water’s North System Renewal Project, a multi-year initiative that included building a new, 8.5-mile pipeline between the Northwater Treatment Plant and the Moffat Treatment Plant. The new pipe, completed in 2022, replaced one that dated from the 1930s. 

The Moffat Treatment Plant, which also started operations in the 1930s, is still used a few months during the year and will eventually transition to a water storage facility. 

Lead Reduction Program

The water Denver Water delivers to customers is lead-free, but lead can get into drinking water as the water passes through old lead service lines that carry water from the water main in the street into the home.

The Lead Reduction Program, which launched in January 2020, is the biggest public health campaign in the utility’s history and considered a leader in the effort to remove lead pipes from the nation’s drinking water infrastructure. 

Denver Water crews dug up old lead service lines from customers’ homes for years of study that led to the utility’s Lead Reduction Program. Denver Water has replaced more than 28,000 old, customer-owned lead service lines at no direct cost to the customer. Photo credit: Denver Water. Photo credit: Denver Water.

The program reduces the risk of lead getting into drinking water by raising the pH of the water delivered and replacing the estimated 60,000 to 64,000 old, customer-owned lead service lines at no direct cost to the customer. Households enrolled in the program are communicated with regularly and provided with water pitchers and filters certified to remove lead to use for cooking, drinking and preparing infant formula until six months after their lead service line is replaced.

To date, Denver Water has replaced more than 28,000 customer-owned lead service lines at no direct cost to the customers. The program received $76 million in federal funding in 2022 to help accelerate the pace of replacement work in underserved communities, resulting in thousands of additional lines being replaced during 2023 and 2024. 

Water storage

Work on the Gross Reservoir Expansion Project, the subject of more than 20 years of planning, got underway in April 2022. Expected to be complete in 2027, the project will raise the height of the existing dam by 131 feet. 

The higher dam will nearly triple the amount of water that can be stored in Gross Reservoir, providing Denver Water with more flexibility to manage its water supply in the face of increasingly variable weather and snowpack patterns. 

The additional storage capacity also will provide a greater balance between Denver Water’s separate north and south water collection areas. (Read Denver Water’s statement on a recent court ruling here.)

Check out the work done on Gross Dam during summer 2024: 

After two years of preparation and foundation work, Gross Dam’s new look began to take shape in 2024 when workers began placing new, roller-compacted concrete at the base of the Boulder County dam in early May. 

Raising the dam involves building 118 steps on the downstream side of the dam. Each step is 4 feet tall with a 2-foot setback.

At the height of construction, there will be as many as 400 workers on-site, and when complete the dam will be the tallest in Colorado. 

Ongoing investments for the future

As the metro area grows and changes, it’s often an opportunity for Denver Water to upgrade older elements of its system. 

Denver Water is continuing its investment in replacing about 80,000 feet of water mains under streets every year while also installing new water delivery pipe where needed. The utility has more than 3,000 miles of pipe in its system, enough to stretch from Seattle to Orlando.

In early 2025, Denver Water will wrap up a major project: replacing 5 miles of 130-year-old water pipe under East Colfax Avenue, from Broadway to Yosemite Street. The pipe replacement work was done in advance of the East Colfax Bus Rapid Transit project. That effort, led by the Denver Department of Transportation and Infrastructure, broke ground in early October.

In addition to replacing the water mains under Colfax, Denver Water crews are replacing any lead service lines they encounter during the project. 

Changing our landscapes

In recognition of the drought in the Colorado River Basin, Denver Water and several large water providers across the basin in 2022 committed to substantially expanding existing efforts to conserve water. 

Among the goals outlined in the agreement is the replacement of 30% of the nonfunctional, water-intensive Kentucky bluegrass in our communities — like the decorative expanses of turf grass in traffic medians — with more natural ColoradoScapes that include water-wise plants and cooling shade trees that offer more benefits for our climate, wildlife and the environment.

Denver Water supported a new state law passed in 2024 designed to halt the expansion of nonfunctional, water-thirsty grass by prohibiting the planting or installation of high-water-using turf in commercial, institutional, or industrial property or a transportation corridor. The bill takes effect Jan. 1, 2026. The new law doesn’t affect residential properties. 

To help customers remodel their landscapes to create diverse, climate-resilient ColoradoScapes, Denver Water offered two workshops this year and is planning additional workshops in 2025. Photo credit: Denver Water.

Denver Water also is working with partners — including local governments, fellow water providers and experts in water use and landscapes — to develop programs that will help transform our landscapes and expand our indoor and outdoor conservation efforts. 

The utility in 2024 held water-wise gardening workshops and offered a limited number of customer discounts on Resource Central’s popular Garden In A Box water-wise garden kits and turf removal services. 


Get tips and information about rebates available for conserving water indoors and out at denverwater.org/Conserve.


The utility also has started work transforming its own landscapes, including about 12,000 square feet around its Einfeldt pump station near the University of Denver. It’s Youth Education program has helped Denver-area students remodel landscapes at their schools. 

And it’s supporting partners, such as Denver’s Parks and Recreation Department, which is replacing 10 acres of water-intensive Kentucky bluegrass covering the traffic medians on Quebec Street south of Interstate 70. The project is replacing the homogenous expanse of turf with a closely managed, water-wise Colorado prairie meadow filled with grasses and wildflowers that provide habitat to pollinators.

These projects are examples of how Denver Water is planning for a warmer, drier future by partnering with our community. Together, we can build a system and a landscape that supports our customers and creates a thriving, vibrant community now and in the future. 

Denver Water’s collection system via the USACE EIS