The U.S. government on Friday presented proposed guidelines intended to govern the use of Colorado River water over the next decade, addressing supply strains that affect roughly one in 10 Americans, support irrigation for land responsible for 15% of U.S. food production, and produce electricity for about 6 million people across seven states.
The seven basin states - Colorado, New Mexico, Utah, Wyoming, Arizona, California and Nevada - failed to reach consensus after more than three years of discussions aimed at replacing a management plan that expires this year. As a result, the U.S. Bureau of Reclamation stepped in with a 10-year proposal running through 2036, captured in a final environmental impact statement the agency released.
The proposed framework is designed to give managers more flexibility in operating the river's two largest hydropower reservoirs, Lake Powell and Lake Mead, allowing adjustments based on evolving hydrologic conditions. In a statement accompanying the release, Secretary of the Interior Doug Burgum said:
"This framework provides the flexibility to respond to changing hydrologic conditions while preserving the opportunity for the Basin States to continue working toward durable, consensus-based solutions," Burgum said.
Key operational limits in the plan include an annual release band from Lake Powell of between 5 million and 12 million acre-feet. This contrasts with prior average annual releases of about 7.5 million acre-feet. The framework also anticipates the possibility of water shortages affecting the three Lower Basin states - Arizona, California and Nevada - of up to 3 million acre-feet per year.
Earlier, on May 1, officials from the Lower Basin had offered a short-term proposal calling for annual cuts of 1.6 million acre-feet per year through 2028. The Bureau's proposal differs in scale and duration, extending through 2036 and specifying a broader range of operational releases.
The agency framed the 10-year approach as a bridge that preserves flexibility to adjust to the river's changing conditions while keeping open the prospect of future, consensus-driven arrangements among the basin states.
Summary
The federal proposal provides a decade-long operational framework for the Colorado River, setting annual release ranges, highlighting potential shortages in the Lower Basin, and aiming to maintain room for interstate negotiations.
- Affected regions: Seven basin states that rely on the Colorado River for municipal supply, irrigation and power.
- Operational detail: Lake Powell releases set between 5 million and 12 million acre-feet per year; prior average was around 7.5 million acre-feet.
- Shortage exposure: Up to 3 million acre-feet per year could be envisaged for Arizona, California and Nevada.