Lake Powell, the second-largest reservoir in the U.S., is nearing critically low water levels, raising concerns about hydropower generation and long-term water supply stability. As of the latest data, the reservoir stands at 3,524.3 feet above sea level, just 34 feet above the minimum elevation required to produce hydropower at Glen Canyon Dam. Meanwhile, Arizona, California, and Nevada have proposed a short-term plan to conserve up to 1 million acre-feet of Colorado River water through 2028, adding to previously announced reductions.
Immediate Action & Core Facts
Lake Powell's water levels are at 27% capacity, with live storage at 5.52 million acre-feet, down from 5.26 million acre-feet in early 1960s records. The reservoir is losing about 4,800 acre-feet of water per day since June 1. The proposed conservation plan by Arizona, California, and Nevada aims to save 3.2 million acre-feet of water by 2028, with Arizona and Nevada cutting usage by roughly one-third and California by 13%.
Deeper Dive & Context
Hydropower Concerns
The reservoir's current elevation is just above the 3,490-foot threshold, below which hydropower turbines cannot operate. Peter Soeth of the U.S. Bureau of Reclamation warns that operations become increasingly complex below 3,500 feet. Jack Schmidt, director of the Center for Colorado River Studies, notes that live storage below 4.3 million acre-feet complicates reservoir management.
Agricultural Impact
Agriculture accounts for roughly three-quarters of direct human water use in the Colorado River Basin. A 2024 study highlights that the basin cannot sustain current agricultural water demands, prompting discussions on water-use efficiency and potential reductions in irrigated farming.
Policy and Conservation Efforts
The proposed conservation plan by the three states would total 3.2 million acre-feet, enough to serve over 25 million people for a year. These savings build on previous reductions by the states and Mexico. The plan reflects growing urgency as Lake Mead remains at 27% capacity, with both reservoirs well below historical averages.