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Colorado River Operations

Colorado River Operations

The Colorado River Basin continues to experience drought exacerbated by the impacts of climate change. Arizona has worked together to ensure stability for Colorado River system supplies currently, in the near-term and in the long-term.

  • Post-2026 Operations – The current guidelines expire in 2026. Arizona continues to work with states across the Colorado River Basin to develop concepts for operating a sustainable river system.
  • Short-term solution (through 2026) – Reclamation featured the Lower Basin states’ May 2023 proposal as the preferred alternative in its Final Supplemental Environmental Impact Statement for Near-Term Colorado River Operations. This will conserve three million acre-feet of Colorado River water by 2026, beyond reductions from the 2007 Shortage-Sharing Guidelines and the Drought Contingency Plan.
  • Current conditions – The Colorado River Basin is in a Tier 1 shortage for 2024.

Post-2026 Operations

The current 2007 Shortage-Sharing Guidelines and Drought Contingency Plan expire at the end of 2026. The federal government issued a Draft Environmental Impact Statement (DEIS) regarding post-2026 operations on Jan. 9, 2026 with comments due on March 2, 2026.

To the right and below are links to CAP’s DEIS comments, statement and related documents.

CAP comments on the DEIS for Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead
CAP DEIS Comments thumbnail
CAP statement regarding its DEIS comments

Short-Term Solution (through 2026)

Former Bureau of Reclamation Commissioner Camille Touton testified before the Senate Committee on Energy and Natural Resources in June 2022, acknowledging that the effects of drought and climate change have been unlike anything we’ve seen in our history. Touton stated that in addition to the actions already prescribed under the 2007 Interim Guidelines and the Drought Contingency Plan, an additional 2 to 4 million acre-feet (MAF) of conservation would be needed through the end of 2026 just to protect the critical levels in the major reservoirs, allowing for power generation and infrastructure stability. This kicked off a heightened sense of urgency to stabilize the system.

In March 2024, Reclamation released its Final Supplemental Environmental Impact Statement for Near-Term Colorado River Operations. This features as the preferred alternative, the Lower Basin states’ May 2023 proposal to conserve three million acre-feet of Colorado River by 2026, beyond reductions previously agreed to under the 2007 Interim Shortage Guidelines and the Drought Contingency Plan.

This is a testament to the Lake Mead conservation efforts that CAP, Arizona and the Lower Colorado River Basin have been committed to for the past decade, which have kept Lake Mead from reaching critical levels.

Arizona-California-Nevada press statement
Arizona, California, Nevada press statement

Current Conditions

Arizona is currently taking Tier 1 reductions for 2025. This represents a 512,000 acre-foot reduction to Arizona’s Colorado River water supply, constituting 30% of CAP’s normal supply, about 18% of Arizona’s Colorado River supply, and just under 8% of Arizona’s total water use.  Nearly all the reductions within Arizona have been taken by Central Arizona Project (CAP) water users. These reductions were determined by the CAP priority system – the result being less available Colorado River water for central Arizona agricultural users.

View our current Colorado River conditions dashboard for data updated at least twice monthly.

This graphic shows the reductions CAP is currently taking. Lake Mead is on the left. The CAP supply is in the middle, showing we have a little more than a million acre-feet available for delivery. And on the right-hand side, you see the total impact to excess water and agricultural supplies and the rather negligible impact to M&I and tribal supplies.

More Information

Visit River Updates on Know Your Water News.

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This link is taking you away from the CAP website and provides information on an external site that is consistent with the intended purpose of the CAP website. CAP cannot attest to the accuracy of the information provided by this link or any other linked site. CAP is not responsible for the information or links provided by sponsors of the site or any products presented on the site. These links do not represent an endorsement by CAP or its directors or employees of site sponsors or products.