FLAGSTAFF, Ariz. (AP) — Federal officials say it may be necessary to reduce water delivery to Colorado River users to prevent the shutdown of a huge dam on the Arizona-Utah border.
Glen Canyon Dam supplies hydropower to some 5 million customers across the U.S. West.
Officials had hoped snowmelt would buoy Lake Powell to ensure the continued operation of the dam.
But snow already is melting, and hotter-than-normal temperatures and prolonged drought are further shrinking the lake.
The Interior Department has proposed holding backwater in the lake to maintain power production.
The agency is asking for feedback from the seven states that rely on the river by April 22.