Lake Powell Drops to Record Low, Deepening Colorado River Crisis

Lake Powell has dropped to its lowest recorded surface elevation, a stark sign of how strained the Colorado River system has become even after federal emergency actions meant to keep the reservoir above the level needed to generate hydropower at Glen Canyon Dam.

NASA Earth Observatory reported Sept. 22 that imagery dated Sept. 10 showed Lake Powell at 3,517.24 feet above sea level, the lowest level on record. That broke the previous record low of 3,519.92 feet, set April 13, 2023, according to NASA Earth Observatory reporting.

The immediate cause was an exceptionally dry and warm 2025-26 winter in the Upper Colorado River Basin, according to NASA Earth Observatory and federal drought summaries. With mountain snowpack running very low, spring runoff into Lake Powell was sharply reduced.

Lake Powell, formed by Glen Canyon Dam on the Colorado River at the Arizona-Utah border, is one of the two biggest reservoirs in the river system, along with Lake Mead. Their levels matter far beyond the shoreline: The Colorado River system supplies water and power to more than 40 million people and supports roughly 5 million to 5.5 million acres of farmland, according to the Department of the Interior and the Bureau of Reclamation.

The operational concern at Powell is the “minimum power pool,” about 3,490 feet above sea level. Below that point, Glen Canyon Dam’s turbines cannot operate normally, putting hydropower generation at risk.

That threat prompted the Bureau of Reclamation, the federal agency that manages major Western water projects, to warn on April 17 that under then-current forecasts Lake Powell could fall below minimum power pool by August 2026 without intervention.

Reclamation announced two emergency steps that day to stabilize the reservoir. First, it said 660,000 to 1.0 million acre-feet would be released from Flaming Gorge Reservoir between April 2026 and April 2027. Second, it cut Lake Powell’s annual release to Lake Mead by 1.48 million acre-feet, lowering it from 7.48 million acre-feet to 6.00 million acre-feet through September 2026.

Those measures were designed to help prop up Powell, but they came with a clear tradeoff downstream. Reclamation said reducing releases from Powell would accelerate Lake Mead’s decline and could cut Hoover Dam hydropower capacity by up to about 40% as early as the fall.

“Given the severity of the risks facing the Colorado River system, it is imperative that we take action quickly to protect a resource that supplies water to 40 million people and supports vital agricultural, hydropower production, tribal, wildlife, and recreational uses across the region,” Andrea Travnicek, assistant secretary for water and science, said in a Bureau of Reclamation news release on April 17.

The pressure on Powell is part of a broader crisis across the river system. Drought.gov said Lake Mead reached an all-time low on Aug. 7, 2026. Two weeks later, on Aug. 21, the Department of the Interior said the combined contents of Lake Powell and Lake Mead were at their lowest level since before Lake Powell began filling in 1963.

That benchmark underscores how little buffer remains in the system’s two main storage reservoirs after years of drought and warming conditions. Federal managers’ emergency actions may have helped keep Powell above the threshold for hydropower, but they did not stop the reservoir from falling to a new record low.

The result is not just a reservoir-level milestone. It is a warning about the shrinking margin for error on a river that underpins daily life across the West, from household water supplies and electricity generation to irrigation for millions of acres of farmland.