Storage Levels Hydrology Weather

California Upper San Joaquin Watershed

Mammoth Pool

June 6 2023

124,664 acre-ft

None% today
None% of Normal Very Low

Water storage levels at Mammoth Pool are currently 124,664 acre-ft, about None% of normal. The average for this time of year is approximately Noneacre-ft.

Maximum recorded Storage since record keeping began in 2021 was 2023-05-21 when levels reached 125,463 acre-ft. Lowest recorded Storage was 2021-10-05 when levels receded to 10,916 acre-ft.

Mammoth Pool is a reservoir located in the Sierra National Forest of California. The history of the reservoir dates back to the early 1900s, when it was constructed as part of the San Joaquin Electric Company's hydroelectric system. The reservoir is fed by several creeks and streams, including the San Joaquin River, as well as snowpack melt from the surrounding mountains. The hydrology of the area is complex and includes a network of aqueducts and pipelines that deliver water to agricultural and urban areas in the Central Valley. The surface flow from Mammoth Pool is used for irrigation in the Fresno area, while the snowpack provides important water resources for the state. The reservoir is also a popular recreational destination, with opportunities for fishing, boating, and camping.

Geolocation -119.328, 37.329
Elevation 3,330 ft
Storage 24hr Change None%
Percent of Normal None%
Minimum 10,916 acre-ft
Maximum 125,463 acre-ft
Average acre-ft
Nearby Reservoirs
Success Dam
Pine Flat Dam
Friant Dam (Millerton)
Courtright (Pg&E)
Terminus Dam
Lake Crowley
Gem Lake
Grant Lake
Hetch Hetchy Res A Hetch Hetchy Ca


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