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    • April 2021 Probable Maximum 24-Month Study

    Metadata Updated: January 16, 2026

    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.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date January 16, 2026
    Metadata Updated Date January 16, 2026
    Data Update Frequency irregular

    Metadata Source

    Harvested from doi-usbr-dcat-us

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 16, 2026
    Metadata Updated Date January 16, 2026
    Publisher Bureau of Reclamation
    Maintainer
    Identifier https://datainventory.usbr.gov/rise/item/72690
    Data Last Modified 2025-07-17T18:00:59Z
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 010:10
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usbr-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 0967743e-8e19-4677-9c3b-f4119f7acb3f
    Harvest Source Id 2e071c0c-5baa-4285-842a-b0a5711bf75d
    Harvest Source Title doi-usbr-dcat-us
    Homepage URL https://data.usbr.gov/catalog/6331/item/72690
    Old 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}
    Source Datajson Identifier True
    Source Hash 4b2894be63be0eeb464e2df026859eb8927ae0d214818588901d65e812bd21b8
    Source Schema Version 1.1
    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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