Big Sage
Key Takeaway
Big Sage is classified as high hazard in California. It was completed in 1921 and is 105 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 | 49 ft (taller than 57.9% in CA) |
| Dam Length | 680 ft |
| Dam Type | Earth |
| Max Storage | 77.0K acre-ft |
| Surface Area | 5,270 acres |
| Drainage Area | 107 sq mi |
| Year Completed | 1921 (105 years old) |
| NID ID | CA00233 |
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
Hot Spring Valley Water District
Public Utility
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Low Hazard 45 ftFrequently Asked Questions
What is the hazard classification of Big Sage?
Big Sage 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 Big Sage?
Big Sage is owned by Hot Spring Valley Water District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big Sage built?
Big Sage was completed in 1921, making it 105 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 Big Sage?
Big Sage serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Big Sage?
Big Sage has a dam height of 49 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 Big Sage last inspected?
Big Sage was last inspected on June 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.