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Arizona positioned to take on cuts in Colorado River supply
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Arizona positioned to take on cuts in Colorado River supply

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Arizona positioned to take on cuts in Colorado River supply

In this Oct. 8, 2019, file photo, the Central Arizona Project canal runs through rural desert near Phoenix.

FLAGSTAFF — Arizona is prepared to lose about one-fifth of the water the state gets from the Colorado River in what could be the first federally declared shortage in the river that supplies millions of people in the U.S. West and Mexico, state officials said Thursday.

Arizona stands to lose more than any other state in the Colorado River basin that also takes in parts of Wyoming, New Mexico, Utah, Colorado, Nevada and California. That's because Arizona agreed long ago to be the first in line for cuts in exchange for federal funding for a canal system to deliver the water to Arizona's major metropolitan areas.

The Arizona Department of Water Resources and the Central Arizona Project, which manages the canal system, said the anticipated reductions will be painful, but the state has prepared for decades for a shortage through conservation, water banking, partnerships and other efforts.

“It doesn't make it any less painful. But at least we know what is coming,” said Ted Cooke, general manager of the Central Arizona Project.

The brunt of the cuts in Arizona will be felt among farmers in central Arizona's Pinal County who already have been fallowing more land and improving wells to pump groundwater in anticipation of the reductions. Most farms there are family farms that are among the state's top producers of cotton, barley, wheat and alfalfa.

The U.S. Bureau of Reclamation projected earlier this month that Lake Mead, which delivers water to Arizona, Nevada, California and Mexico, will fall below 1,075 feet for the first time in June 2021. If the lake remains below that level in August when the bureau issues its official projection for 2022, Arizona and Nevada will lose water.

The two states already voluntarily have given up water under a separate drought contingency plan.

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The voluntary and mandatory Tier 1 cuts mean Arizona will lose 18% of its Colorado River supply, or 512,000 acre-feet of water. The amount represents 30% of the water that goes to the Central Arizona Project and 8% of Arizona's overall water supply.

Some of that water will be replaced through water exchanges, transfers from cities to irrigation districts or through water that was stored in Lake Mead in a sort of shell game. The state, tribes and others also contributed financially to help develop groundwater infrastructure.

“We like to think we find ways to take care of ourselves collectively,” said Tom Buschatzke, director of the Arizona Department of Water Resources.

Some water users won't be made whole if the Bureau of Reclamation's projections pan out.

The cutbacks come at a time when temperatures are rising and drought has tightened its grip on the U.S. Southwest, increasingly draining Lake Mead and Lake Powell, the two largest man-made reservoirs in the U.S., to their lowest levels since they were filled.

Lake Mead along the Arizona-Nevada border has dropped by about 16 feet since this time last year. Lake Powell on the Arizona-Utah border has fallen by 35 feet, the Bureau of Reclamation said.

The reductions in Arizona won't hit cities or people's homes, or affect water delivered through the canal system for Native American tribes. Still, anyone living in the desert should be concerned — but not panic — about water, said Rhett Larson, an associate professor at Arizona State University and an expert on water law and policy.

“The fact that you're not feeling it in your tap doesn't mean you won't feel it at the grocery store because Pinal County farmers are growing a lot of the things you eat and use,” he said.

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