Federal Colorado River plan puts Lake Powell and Mead on deadline
The federal government is moving toward a new operating plan for the Colorado River while Lake Powell and Lake Mead remain under pressure and the basin’s seven states have not reached full agreement.
A federal proposal reported by The Associated Press could require Arizona, California and Nevada to reduce their combined use by as much as 3 million acre-feet annually through 2036. The proposal would allow deeper reductions in drier conditions, but it is not the final operating rule and would not automatically impose the full amount on every household or farm.
The Interior Department says it will decide how the river’s major reservoirs will be operated after 2026 before Oct. 1, 2026, the start of Water Year 2027. The current operating agreements expire at the end of calendar year 2026.
Why the deadline matters
The current framework includes the 2007 Interim Guidelines and the 2019 Colorado River Basin Drought Contingency Plans. Those agreements guide operations for Lake Powell, Lake Mead and related facilities through the end of 2026.
On Feb. 14, 2026, the Interior Department said it would continue the post-2026 National Environmental Policy Act process and make an operating decision before Oct. 1 despite the lack of full consensus among Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming.
Reclamation’s draft environmental review evaluates several possible operating strategies. It covers domestic river operations. Mexico’s deliveries are handled through a separate binational process under the 1944 water treaty.
What the proposal could require
The proposal described by AP would place mandatory reductions primarily on the Lower Basin states: Arizona, California and Nevada. Together, they could face reductions of up to 3 million acre-feet per year through 2036, with the actual amount determined every two years based on conditions across the basin.
Under the proposal, half of the reductions would be divided under a plan developed by the three states. For other reductions, the federal framework would account for existing water-right priorities, which generally provide California users greater protection than users in Arizona and Nevada.
The states have not agreed on the approach. Arizona officials called the proposal flawed, Nevada officials described the potential reductions as unrealistic and damaging, and California officials said it was an important step but not a final agreement. The Upper Basin states have opposed mandatory reductions in their states, although they could pursue voluntary conservation.
Reservoir levels are also a power issue
Reclamation’s emergency 2026 actions are separate from the post-2026 rulemaking. The agency plans to add as much as 2.48 million acre-feet to Lake Powell by transferring water from Flaming Gorge Reservoir and reducing releases from Lake Powell to Lake Mead.
Reclamation said it intended to release between 660,000 acre-feet and 1 million acre-feet from Flaming Gorge from April 2026 through April 2027. It also planned to reduce the annual release from Lake Powell to Lake Mead by 1.48 million acre-feet, from 7.48 million acre-feet to 6 million acre-feet, through September 2026.
The measures are intended to keep Lake Powell above the 3,490-foot minimum power pool. Reclamation said that if Glen Canyon Dam falls below that level, releases would be limited to river outlet works, creating operational uncertainty and reducing power generation.
The same strategy puts additional pressure on Lake Mead. Reclamation said reduced releases from Lake Powell could produce an additional reduction of as much as 40% in Hoover Dam’s hydropower generating capacity as early as fall 2026. That could affect power customers and regional electricity costs, but it does not automatically mean widespread outages.
Who could feel the effects
Reclamation says the Colorado River provides municipal water for approximately 40 million people, supports 5.5 million acres of farmland and serves 30 Tribal Nations. The river also supports hydropower customers, seven national wildlife refuges, four national recreation areas and 11 national parks.
For cities, a federal reduction would not necessarily mean that household taps immediately lose the full amount. Effects will depend on the final rule, reservoir conditions, legal rights, state implementation and hydrologic triggers. Some communities may face higher water costs or greater reliance on groundwater, recycling and other supplies.
Farmers could face reduced deliveries, fallowed fields or higher water prices. Lower reservoir levels can also limit boat access, affect rafting and fishing conditions, and create pressure on wildlife programs and public lands. Tribal Nations are part of the federal consultation process, but their interests and positions are not uniform.
What is decided and what remains unresolved
The 2026 emergency operations are near-term measures intended to protect the river system and its infrastructure. The post-2026 proposal is part of a separate federal environmental review and operating-guideline process. Neither establishes the final allocation of future reductions.
State objections, tribal consultation, implementation details and possible litigation remain unresolved. The federal review also does not replace the separate binational process governing deliveries to Mexico.
What happens next
Reclamation’s monthly 24-Month Study reports will continue to provide modeled projections for reservoir elevations and operations. The agency says those projections carry uncertainty and may change as hydrologic and operating conditions change.
Interior must complete the post-2026 process and decide on operations before Oct. 1, 2026. Until that decision is issued, the reported 3-million-acre-foot ceiling remains a proposal, while the emergency 2026 measures remain a separate effort to protect Lake Powell, water deliveries and power generation during the transition.
Sources
- Bureau of Reclamation: Interior Department moves forward on Colorado River guidelines
- Associated Press: Arizona, California and Nevada would share Colorado River cuts
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