#ColoradoRiver: Lake Mead to get “bonus” water from Lake Powell #COriver

Lake Mead from Hoover Dam December 13, 2016.

From the Associated Press (Dan Elliott):

The Bureau of Reclamation, which manages dams and reservoirs on the Colorado River, said it will release 9 million acre-feet (11 billion cubic meters) from Lake Powell, sending it down the Colorado to Lake Mead, where it will be tapped by Arizona, California and Nevada…

…the planned release is above the annual average of 8.7 million acre-feet (10.7 billion cubic meters), and it should be enough to delay a widely expected shortage in Lake Mead, said Marlon Duke, a spokesman for the Bureau of Reclamation.

A shortage would trigger cuts in water deliveries to Arizona and Nevada, the first states to be hit under the multistate agreements and rules governing the Colorado River. That had been expected as soon as next year.

“It’s pushed that shortage likelihood out into the future,” Duke said, but it’s too early to say how far.

Melting snow is expected to raise the level of Lake Powell by about 50 feet (15.24 meters) by mid-July, but after the 9 million acre-feet (11 billion cubic meters) is released, the reservoir will be about 35 feet (10.67 meters) higher on Oct. 1 than it is now, he said.

The two reservoirs are part of the Colorado River system, which supplies water to about 40 million people and 6,300 square miles (16,317 sq. kilometers) of farmland in seven states and 20 Indian reservations. Mexico is also entitled to a share under a treaty.

A prolonged drought and rising demand for water have overtaxed the river. Some researchers say global warming is also affecting water flows.

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