#Severe #ColoradoRiver #drought leads to water releases from Upper Basin reservoirs and reduced flows from #LakePowell — #Aspen Public Radio #COriver #aridification

May 1, 2026 seasonal water supply forecast summary.

Click the link to read the article on the Aspen Public Radio website (Caroline Llanes). Here’s an excerpt:

May 20, 2026

Reclamation announced on April 17 that it would release between 600-thousand and one million acre feet of water from Flaming Gorge Reservoir on the Wyoming-Utah state line over the course of the next year. In addition, Reclamation will reduce the amount of water it sends from Lake Powell through Glen Canyon Dam, decreasing flows downstream through the Grand Canyon and into Lake Mead. Through September 2026, the agency will reduce its annual release volume from about 7.5 million acre feet of water to just 6 million acre feet.

Upper Colorado River Basin Snow Water Equivalet and Total Percent Averages are from the 30 year average calculated from data between 10/01/1990 and 09/30/2020. Graphic credit: Water-Date.com

The drought contingency actions come in response to a water year that has been incredibly dire for the Western United States and the Colorado River Basin. Snowpack has been at record lows for much of the winter, which is bad news for a region that relies on snowmelt for much of its water use. The forecast for runoff into Lake Powell from the entire Upper Basin is forecast to be just 23% of normal. The agency estimates that these combined actions will boost Lake Powell’s elevation by 54 feet over the course of the year, bringing it to 3,500 feet in April 2027. Currently, Lake Powell’s elevation is about 3,528 feet. 3,490 feet is the elevation at which hydropower can no longer be produced at Glen Canyon Dam. Any lower, and water will not be able to enter the hydroelectric turbines. Instead, the water has to go through what’s called “river outlet works,” which are tunnels that bypass the turbines to get the water downstream to the Colorado River. Seth Arens, a hydrologist at the Western Water Assessment, said Glen Canyon Dam was not designed to have the river outlet works as the primary way to get water out of the reservoir.

The back of Glen Canyon Dam circa 1964, not long after the reservoir had begun filling up. Here the water level is above dead pool, meaning water can be released via the river outlets, but it is below minimum power pool, so water cannot yet enter the penstocks to generate electricity. Bureau of Reclamation photo. Annotations: Jonathan P. Thompson

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