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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.
Year Completed |
1958 |
Dam Length |
750 |
Dam Height |
317 |
River Or Stream |
Middle Fork Stanislaus River |
Primary Dam Type |
Concrete |
Surface Area |
418 |
Hydraulic Height |
310 |
Drainage Area |
226 |
Nid Storage |
65000 |
Structural Height |
317 |
Outlet Gates |
Tainter (radial) - 5 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
317 |
| Location | Reservations | Toilets |
|---|---|---|
Mill Creek Campground
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Niagara Creek Campground
|
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Niagra Creek
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Cascade Creek Campground
|
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Cascade Creek
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Spicer Reservoir Group Campground
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Confluence With Clark Fork To Donnell Reservoir
State Highway 108 To Donnell Reservoir
Bell Creek Headwaters To One-Tenth Mile Upstream Of Crabtree Trailhead
One-Tenth Mile Upstream Of Crabtree Trailhead To 0.15 Mile Downstream Of Road 4N26B
Relief Reservoir Outlet To Confluence With Clark Fork
Wilderness Boundary To Confluence With Middle Fork Stanislaus