RESERVOIR LEVELS
December 21, 2024
7,220 ft 38.27, -119.73


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Relief Dam, located in Tuolumne, California, is a privately-owned structure primarily used for hydroelectric purposes. Completed in 1909, this rockfill dam stands at a height of 140 feet and has a storage capacity of 15,600 acre-feet. The dam's reservoir covers a surface area of 223 acres and is fed by Summit Creek, making it a vital water resource in the region.

Managed and regulated by various state and federal agencies, including the Federal Energy Regulatory Commission, Relief Dam poses a high hazard potential due to its age and design. Despite its moderate risk assessment, the dam has not undergone a recent condition assessment, raising concerns about its structural integrity. Emergency Action Plans have been prepared, but their compliance with guidelines is unclear, highlighting the need for regular inspections and maintenance to ensure the safety and reliability of this essential water infrastructure for Baker Station and surrounding areas.

For water resource and climate enthusiasts, Relief Dam represents a historic feat in hydroelectric engineering but also serves as a reminder of the ongoing challenges in managing aging infrastructure. With its high hazard potential and limited condition assessment data, there is a pressing need for continued monitoring and risk management measures to safeguard the community and environment from any potential dam failure. The collaboration between state and federal agencies is crucial in ensuring the long-term resilience of Relief Dam and its contribution to the local water supply and energy generation.

Storage 24hr Change -0.28%
Percent of Normal 200%
Minimum 224 acre-ft
2014-01-26
Maximum 17,727 acre-ft
2012-06-09
Average 6,138 acre-ft
Dam_Height 140
Year_Completed 1909
Nid_Storage 15600
Primary_Dam_Type Rockfill
Surface_Area 223
Hazard_Potential High
River_Or_Stream Summit Creek
Dam_Length 560
Nid_Height 140
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