MODESTO RESERVOIR

RESERVOIR LEVELS
February 9, 2025


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Modesto Reservoir, located in Modesto, California, is a vital water resource infrastructure primarily used for irrigation and water supply purposes. Constructed in 1911, this Earth-type dam stands at a height of 36 feet and has a storage capacity of 40,000 acre-feet, serving the needs of the local community and surrounding agricultural areas. The reservoir is situated on the Tuolumne River, covering a surface area of 3,800 acres and draining an area of 10 square miles.

Managed by a public utility agency, Modesto Reservoir is regulated and inspected by the California Department of Water Resources for safety and compliance. Despite its high hazard potential due to its critical role in water supply, the dam's condition assessment in 2017 reported it as satisfactory. With a recent inspection in March 2021 and an emergency action plan prepared, the reservoir is equipped to handle potential risks and emergencies effectively. As a significant water infrastructure in the region, Modesto Reservoir plays a crucial role in ensuring water security and resource sustainability for the local community and beyond.

24hr Change None%
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Maximum
Average
Dam_Height 36
Hydraulic_Height 36
Drainage_Area 10
Year_Completed 1911
Nid_Storage 40000
Hazard_Potential High
River_Or_Stream Tr Tuolumne Rv
Surface_Area 3800
Dam_Length 1235
Primary_Dam_Type Earth
Nid_Height 36
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