The plan, part of which the Bureau of Reclamation is expected to describe in an Environmental Impact Statement on Friday, comes at a time of escalating crisis for the Colorado, a crucial water source for seven states, 30 Native tribes and a swath of northwestern Mexico. But experts say it will not be sufficient to resolve a political standoff among the river’s many users or prevent the beleaguered waterway from teetering toward collapse.
The cuts proposed for the next two years resemble what the three states offered in a proposal this spring, and represent the first phase of a broader 10-year framework for operating the river’s dams and reservoirs, according to the officials, who spoke on the condition of anonymity to discuss ongoing negotiations.
That framework is expected to call for operating plans to be developed every two years and outline a wide range of possible measures those plans could include — including reducing the amount of water released to the Lower Basin by as much as 40 percent.
The framework is not expected to consider mandatory cuts to water use from the four states in the upper part of the basin: Colorado, New Mexico, Utah and Wyoming. Arizona, California and Nevada make up the Lower Basin. [...]
The current operating rules, which expire at the end of September, have not prevented chronic overuse of the river amid a decades-long drought worsened by climate change.
After a historically meager winter snowfall and a scorching spring, the amount of water flowing into the river this year is less than a quarter of average annual demand, and levels in its major reservoirs have dropped to record lows. Scientists warn that one or two more dry years could crash the entire system, disrupting hydropower production, drinking water supplies and irrigation for some 5 million acres of farmland. [...]
The likely operating plan for 2027 and 2028, based on a May proposal from the Lower Basin states, is projected to save about 3.2 million acre feet of water — enough to fill roughly 1.5 million Olympic swimming pools. The plan will require significant “belt tightening,” particularly in Arizona, according to Sarah Porter, director of the Kyl Center for Water Policy at Arizona State University, but states have indicated they can tolerate the reductions.
Yet those measures are only half of what studies suggest is needed to bring water demand in line with the dwindling supply, Porter cautioned, increasing the likelihood of even steeper cuts down the road. [...]
The 330-mile system of canals and aqueducts, which supplies water to the most populated parts of Arizona, is poised to see the biggest cut in its history under the bureau’s operating plan for the next two years. If the agency chooses to implement some of the deeper reductions considered in the 10-year framework, CAP’s entire water allocation could be wiped out. [...]
Fraught negotiations
Experts say the rising tensions on the river result from a chaotic combination of bad weather, poor planning, intransigent state officials and federal missteps under the Trump and Biden administrations.
At the heart of the conflict is an impasse between the Upper and Lower Basin states over who should shoulder the burden of necessary cuts.
In the Upper Basin, home to the snowcapped mountains and winding tributaries that feed the river, there are few reservoirs to provide long-term water storage, leaving users reliant on natural flows. That means the Upper Basin takes an automatic cut during dry years, officials argue. They say responsibility for restoring water to Lakes Powell and Mead should fall on the Lower Basin states that use them.
Yet about three-quarters of the people who depend on the Colorado live in the Lower Basin. The region is also home to major cities and sprawling farms that provide most of the nation’s winter vegetable supply. Officials from these states say they have already curbed their water consumption by millions of acre feet in recent years. Overuse of the river is universal, they argue, and so too is responsibility for saving it.
The situation is complicated by the arcane legal framework governing the river, which prioritizes users chronologically. Without agreements among the states, major cuts would fall entirely on junior users, including huge cities such as Phoenix and Tucson, before more senior rights-holders such as the farmers in California’s Imperial Valley see any reductions.
Last summer, it looked like states might agree on a new method of apportioning the river based on actual flow, rather than historical averages and legal agreements. But those negotiations broke down over familiar disagreements about who should be subjected to mandatory cuts. [...]
A vanishing river
Brad Udall, a climate scientist at Colorado State University’s Colorado Water Center, describes the tensions over the river as a “big collision of 19th-century water law, 20th-century infrastructure and 21st-century climate change and population growth.”
The Colorado has almost never contained enough water to satisfy everyone who has legal rights to it, Udall said, and human-caused warming has made the situation even worse. Since 2000, high temperatures and shifting rainfall patterns linked to climate change have diminished the amount of water flowing through the river by about 20 percent, compared to the 20th-century average.
The deficits have forced repeated negotiations over how to manage shortages. Past deals have helped curb consumption somewhat, but they were never stringent enough to reverse the inexorable decline of reservoirs that are intended to provide a buffer during bad years.
Lake Mead, the site of the Hoover Dam, is mere inches from its lowest level on record. A few hundred miles upstream, Lake Powell is approaching the point at which water can no longer flow through the turbines of the Glen Canyon Dam. That raises the risk of a phenomenon called cavitation, in which air bubbles form then implode in fast-moving water, releasing energy that can damage the dam itself.
“The reservoirs are depleted so low they’re really at the end of their capability,” Castle said. “We’re in such a precarious situation.”
by Sarah Caplan, Washington Post | Read more:
Image: Caroline Brehman/Reuters[ed. The U.S. Bureau of Reclamation on Friday unveiled the framework that will guide operations on the Colorado River through 2036. See also: Lake Powell's Dying Days (CCG):]
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The L.A. Times’ Ian James reported that Trump’s Interior Department would accept a proposal submitted by California, Arizona and Nevada — the Lower Basin states — to slash their water use by 12%, 31% and 28%, respectively, through 2028. They’ll receive $350 million from Biden’s Inflation Reduction Act to support water conservation.The Upper Basin states — Colorado, Utah, New Mexico and Wyoming — will get $100 million in conservation funding. But unlike their downstream neighbors, they won’t face mandatory water cuts. However much water they end up saving, that will be good enough. [...]
If Powell’s water levels sink much lower, water won’t be able to pass through the dam’s hydropower turbines, which generate cheap electricity for communities across the West. That wouldn’t be a “dead pool” situation; water could still flow downstream to the Grand Canyon and Lake Mead through bypass tubes lower in the dam. But the bypass tubes are surprisingly frail and could break with sustained use.
Translation: We are frighteningly close to “de facto dead pool.” That’s why the Trump administration is ordering everyone to use less water.
Well, not everyone. California, Arizona and Nevada are willing to cut back dramatically, and federal officials seem happy to make them do it. The Upper Basin states — the ones upstream of Lake Powell — say they shouldn’t have to commit to mandatory reductions, in part because they already consume a lot less.
In a New York Times opinion piece earlier this year, I argued that the Upper Basin states need to do more. Podmore agreed.
“It’s a tricky situation, because the Lower Basin has always used more water, and that’s a convenient argument for the Upper Basin,” he said. “But also, there’s more people in the Lower Basin. And the most productive agricultural land that’s irrigated with Colorado River water is located in the Lower Basin.”
“Even with the cuts that the Lower Basin has offered, we still have a long way to go to balance the water budget,” he added. “Everyone needs to pitch in.”
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The developer behind California's biggest planned AI data center publicly swore it would never touch Colorado River water. It would run on recycled wastewater — clean, virtuous, zero environmental impact. That pledge held right up until the cities of Imperial and El Centro said no thanks. Now Imperial Valley Computer Manufacturing (IVCM) has sued the Imperial Irrigation District (IID) for access to the very river it promised to leave alone. The facility would sit in a desert valley where 180,000 people share exactly one freshwater source.The Farm-to-Cloud Gambit
IVCM's legal strategy treats 160 acres of fallowed farmland as a water entitlement for a nearly million-square-foot AI campus.
The developer's playbook relies on a tactic called "buy and dry" — purchasing irrigated farmland, retiring it from production, then claiming its water allocation for industrial use.