Pyramid
Key Takeaway
Pyramid is classified as high hazard in California. It was completed in 1974 and is 52 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 400 ft (taller than 99.2% in CA) |
| Dam Length | 1,090 ft |
| Dam Type | Earth |
| Max Storage | 171.0K acre-ft |
| Normal Storage | 170.0K acre-ft |
| Surface Area | 1,290 acres |
| Drainage Area | 432 sq mi |
| Max Discharge | 20,000 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | CA00052 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
California Department of Water Resources
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Pyramid?
Pyramid is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Pyramid?
Pyramid is owned by California Department of Water Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pyramid built?
Pyramid was completed in 1974, making it 52 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Pyramid?
Pyramid serves the following purposes: Water Supply, Recreation, Hydroelectric, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Pyramid?
Pyramid has a dam height of 400 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Pyramid last inspected?
Pyramid was last inspected on May 9, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.