DONNELLS

Reservoir Levels Weather Hydrology


Donnells Dam, located in Sonora, California, on the Middle Fork Stanislaus River, is a concrete structure designed by the George E. Goodall Co. and completed in 1958. It serves primarily for hydroelectric purposes, with a dam height of 317 feet and a storage capacity of 65,000 acre-feet. The dam has a controlled spillway with a width of 175 feet and five Tainter (radial) outlet gates.

Managed by the Federal Energy Regulatory Commission (FERC), Donnells Dam is regulated and inspected to ensure its safety and functionality. With a high hazard potential and a very high risk assessment rating, the dam is closely monitored for any potential risks or hazards. While the condition assessment is currently not available, emergency action plans are in place, and the dam meets regulatory guidelines for safety and operation.

As a key structure in flood risk reduction and hydroelectric power generation, Donnells Dam plays a crucial role in water resource management in the area. Its strategic location in Tuolumne County, California, highlights its importance in ensuring water supply and energy generation for the region. With its impressive design and critical functions, Donnells Dam continues to be a focal point for water resource and climate enthusiasts interested in sustainable infrastructure and environmental stewardship.

October 9, 2024

°F

°F

mph

Windspeed

%

Humidity

Storage 24hr Change None%
Percent of Normal None%
Minimum 4 acre-ft
2023-10-02
Maximum 64,801 acre-ft
2006-07-13
Average 39,817 acre-ft
Nid_Height 317
Hydraulic_Height 310
Drainage_Area 226
Year_Completed 1958
Dam_Height 317
Structural_Height 317
River_Or_Stream Middle Fork Stanislaus River
Primary_Dam_Type Concrete
Foundations Rock
Surface_Area 418
Hazard_Potential High
Outlet_Gates Tainter (radial) - 5
Nid_Storage 65000
Dam_Length 750

Regional Streamflow

59

Cubic Feet Per Second

45

Cubic Feet Per Second

27

Cubic Feet Per Second

21000

Cubic Feet Per Second
5-Day Weather Forecast

16-Day Weather Forecast

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