October 2023 Probable Maximum 24-Month Study

Published by Bureau of Reclamation | Department of the Interior | Metadata Last Checked: January 06, 2026 | Last Modified: 2025-02-14T14:36:54Z

The Probable Maximum 24-Month Study report describes projected operations and power generation for Colorado River system reservoirs including Fontenelle, Flaming Gorge, Taylor Park, Blue Mesa, Morrow Point, Crystal, Vallecito, Navajo, Powell, Hoover Dam - Lake Mead, Davis Dam - Lake Mohave, and Parker Dam - Lake Havasu. Operations were projected using Reclamation’s 24-Month Study RiverWare model with the Probable Maximum unregulated inflow projections provided by the National Weather Service’s Colorado Basin River Forecast Center. The Probable Maximum inflow scenario reflects a wet hydrologic condition which statistically would be exceeded only 10% of the time.

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Complete Metadata

bureauCode	[ "010:10" ]
identifier	https://datainventory.usbr.gov/rise/item/128668
landingPage	https://data.usbr.gov/catalog/6331/item/128668
spatial	{"type":"Polygon","coordinates":[[[-108.12813,31.312],[-111.16035,31.34953],[-115.07149,32.54276],[-115.95039,37.26148],[-112.96211,37.47104],[-109.66621,42.90464],[-106.28242,42.09466],[-105.35957,39.70349],[-105.49141,35.88516],[-107.9084,35.45675],[-108.12813,31.312]]]}

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