Alpine
Key Takeaway
Alpine is classified as high hazard in California. It was completed in 1917 and is 109 years old. Its primary use is other. 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 | 143 ft (taller than 89.1% in CA) |
| Dam Length | 524 ft |
| Dam Type | Gravity |
| Max Storage | 8.9K acre-ft |
| Surface Area | 224 acres |
| Drainage Area | 10 sq mi |
| Year Completed | 1917 (109 years old) |
| NID ID | CA00204 |
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
Marin Municipal Water District
Public Utility
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Significant Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Alpine?
Alpine 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 Alpine?
Alpine is owned by Marin Municipal Water District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Alpine built?
Alpine was completed in 1917, making it 109 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 Alpine?
Alpine serves the following purposes: Other, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Alpine?
Alpine has a dam height of 143 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 Alpine last inspected?
Alpine was last inspected on September 13, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.