YEAR OVER YEAR
SUMMARY
| Storage 24hr Change | None% |
| Percent of Normal | None% |
| Minimum |
10,916 acre-ft
2021-10-05 |
| Maximum |
128,184 acre-ft
2023-06-06 |
| Average | acre-ft |
| Dam_Height | 411 |
| Hydraulic_Height | 330 |
| Drainage_Area | 995 |
| Year_Completed | 1960 |
| Nid_Storage | 122175 |
| Structural_Height | 411 |
| Foundations | Rock |
| Surface_Area | 1100 |
| Hazard_Potential | High |
| River_Or_Stream | San Joaquin River |
| Dam_Length | 820 |
| Primary_Dam_Type | Earth |
| Nid_Height | 411 |
Mammoth Pool, a privately owned dam located in Big Creek, California, serves as a key hydroelectric facility along the San Joaquin River. Built in 1960 by Bechtel, the earth dam stands at a height of 411 feet and has a storage capacity of 122,175 acre-feet. The dam's primary purpose is hydroelectric generation, but it also offers recreational activities on its 1,100-acre surface area.
With a high hazard potential and a moderate risk assessment, Mammoth Pool is regulated and inspected by both state and federal agencies to ensure its safety and compliance with regulations. The dam features an uncontrolled spillway with a width of 403 feet and can discharge up to 235,000 cubic feet per second. Despite its age, Mammoth Pool continues to be a vital water resource and energy provider in the region, contributing to the sustainable development of California's water and energy infrastructure.
