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US cuts deep Colorado River water to California, Nevada and Arizona

U.S. government finalized on Friday a plan for reducing?water supply to California, Nevada, and Arizona in order to manage the drought-stricken Colorado River, but left open the possibility that the cuts could be even deeper later in the decade. According to the plan, the three states in the lower basin will receive a reduction of 21% in water in 2027-2028. However, the cuts could double in future years.

Arizona and Nevada said that any plan to double cuts after 2028 will destroy their economies. Arizona has threatened the federal government with a lawsuit if they impose these potential cuts in the new 10-year plan.

Colorado, Utah and Wyoming, the states in the upper basin, are not subject to mandatory cuts. Colorado River water is used by one in ten Americans. It irrigates the land that produces 15% of U.S. agricultural output. And it generates power for six million people across seven states. In 1922 the river's governing agreement allocated water roughly equally to both basins. However, California, Arizona, and Nevada historically used more water. This was a major point of contention. Arizona Governor Katie Hobbs praised the federal government's decision to adopt the Lower Basin proposal for water reductions in 2027-2028. She said that the 10-year plan of the federal government did not provide water to Lower Basin states as they were entitled. She called Upper Basin's refusal of negotiating reductions in their water use "reckless." Hobbs stated in a press release that Arizona is prepared to defend our water with any legal means possible and will not back down when defending our rights. Upper Basin States refused to accept any cuts in water supply during three years of failed negotiation between the seven states. They argued that the severe drought affecting the U.S. West was causing them to run out of water. This month, Lake Powell and Lake Mead - the two nation's largest reservoirs - reached record lows. On Thursday, the water level in Lake Powell was 3,519.2 ft above sea level -- just 30 ft above the minimum required to run the Glen Canyon Dam hydroelectric plant in Arizona. According to a proposal from the Lower Basin States made on May 1, their water allocation will be reduced by combined 1.6 millions acre-feet each year in 2027 and 2028.

The three states have agreed to conserve water by a combined amount of 3.2 MAF in two years. This is based on a mandatory cut of 1.25 MAF each year and reducing the consumption of water by 700,000 MAF in two years.

If necessary to maintain critical levels of reservoirs, the annual mandatory cuts for the three states can almost double up to 3.0 MAF each year.

A lawsuit over these potential cuts could lead to more uncertainty. California Governor Gavin Newsom stated that all seven states who depend on the Colorado River must conserve water. Newsom stated in a press release that the plan only provides "short-term stability". "Any long-term solutions must be shared fairly among all seven states to recognize the new reality of the Colorado River." Sarah Porter, a hydrologist, still believes that Arizona will sue the federal Government over its plan for 2029-2036. She said that the state was not happy with the Bureau of Reclamation assessing its authority to?cut water deliveries from Lake Mead?to Lower Basin states and not impose compulsory cuts on upper basin?states. Porter, director at the Kyl Center for Water Policy, Arizona State University, said that the Bureau of Reclamation has made it "clear" that, if reservoir levels fall to certain points in the future, they may take further cuts, limit Lake Powell releases, or other actions far beyond the Lower Basin's agreement. Reporting by Nichola Hay and Andrew Hay from Los Angeles; Additional reporting by Jasper Ward from New York; Editing done by David Gregorio

(source: Reuters)