Growing fears of ‘dead pool’ on Colorado River as drought threatens Hoover Dam water

LA Times

Ian James

LAS VEGAS, NV -JULY 12, 2022: A buoy lays on a dried mud flat at a shuttered marina at the drought stricken Lake Mead on July 12, 2022 in Las Vegas, Nevada. The water levels at Lake Mead are at historic lows forcing the closures of all but one marina at the lake.(Gina Ferazzi / Los Angeles Times)
A buoy lies on a dried mud flat at a closed marina at drought-stricken Lake Mead on July 12 near Las Vegas. (Gina Ferazzi / Los Angeles Times)

The Colorado River’s largest reservoirs stand nearly three-quarters empty, and federal officials now say there is a real danger the reservoirs could drop so low that water would no longer flow past Hoover Dam in two years.

That dire scenario — which would cut off water supplies to California, Arizona and Mexico — has taken center stage at the annual Colorado River conference in Las Vegas this week, where officials from seven states, water agencies, tribes and the federal government are negotiating over how to decrease usage on a scale never seen before.

Outlining their latest projections for Lake Powell and Lake Mead, the nation’s two largest reservoirs, federal water managers said there is a risk Lake Mead could reach “dead pool” levels in 2025. If that were to happen, water would no longer flow downstream from Hoover Dam.

“We are in a crisis. Both lakes could be two years away from either dead pool or so close to dead pool that the flow out of those dams is going to be a horribly small number. And it just keeps getting worse,” said Tom Buschatzke, director of the Arizona Department of Water Resources.

He said there is a real danger that if the coming year is extremely dry, “it might be too late to save the lakes.”

Hoover Dam
Federal officials are warning that Lake Mead could fall to dead pool levels by 2025. At that point, water would no longer flow downstream of Hoover Dam, pictured here. (Allen J. Schaben / Los Angeles Times)

The Colorado River has long been severely overallocated, and its flows have shrunk dramatically during a 23-year megadrought supercharged by global warming.

Over the last six months, federal officials have pressed water managers in the seven states that rely on the river to come up with plans for major cutbacks. But negotiations have so far failed to produce an agreement, and the voluntary cuts states and water agencies have proposed remain far from the federal government’s goal of reducing water use by 2 million to 4 million acre-feet per year — a decrease of roughly 15% to 30%.

Faced with the prospect of federal authorities imposing mandatory, large-scale cutbacks, officials from states and water districts have been holding private, backroom talks in an effort to reach an agreement.Story continues

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