Colorado River · U.S. Bureau of Reclamation
Lake Powell
Glen Canyon Dam · 24.32 MAF capacity at full pool
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About Powell
Lake Powell sits behind Glen Canyon Dam on the Colorado River, straddling the Arizona–Utah border in Glen Canyon National Recreation Area. It is the second-largest reservoir in the United States by maximum capacity.
Glen Canyon Dam was completed in 1963 and is operated by the U.S. Bureau of Reclamation as part of the Colorado River Storage Project. The reservoir's primary role is to store Upper Colorado Basin water for delivery downstream to the Lower Basin states.
Daily storage, elevation, and release values come from the USBR Reclamation Information Sharing Environment (RISE). Operating tier reference elevations follow the 2022 Drought Response Operations Agreement, with the DROA target at 3,525 feet, minimum power pool at 3,490 feet, and dead pool at 3,370 feet.