Lake Powell reaches record low water level amid prolonged western drought

Lake Powell, the reservoir that straddles the Utah-Arizona border, recorded a surface elevation of 3,519.91 feet above sea level on Aug. 15, the lowest level ever measured by the Bureau of Reclamation’s automated gauges. The previous record, 3,519.92 feet, was set in April 2023. Federal officials warn that if the lake drops below 3,490 feet, its ability to generate hydroelectric power could be compromised, and further declines could push it into the "dead pool" stage where water can no longer flow downstream.

The Bureau of Reclamation said the reading may be revised, but the downward trend has been expected for months. Simultaneously, Lake Mead, downstream of the Hoover Dam, also hit a historic low on Aug. 7 and continues to fall. Both reservoirs supply drinking water, irrigation, and electricity to millions of people across seven western states, Native American tribes, and parts of Mexico.

Experts attribute the prolonged drought to climate change, which is reducing snowfall in the Rocky Mountains that feeds the Colorado River. Peter Goble, assistant state climatologist for Colorado, said, "There's no way to look at the numbers and think the Colorado River is doing well right now. In a world that's warmer, all signs point to droughts that will be more intense and more frequent."

Aaron Weiss, executive director of the Center for Western Priorities, emphasized the urgency of solutions, stating, "Whatever the solutions are, they're going to have to happen rapidly."

Proposals under discussion include stricter water-conservation measures, incentives for reduced irrigation, and, in some cases, large-scale engineering ideas such as diverting water from other river basins or building desalination facilities. Environmental groups have also suggested removing or bypassing Glen Canyon Dam to lower water demand.

A federal plan released last month proposes cutting water releases from Lake Mead, a move that could limit irrigation for farms in California and Arizona and require additional conservation steps in cities throughout the region.