Lagunitas
Key Takeaway
Lagunitas is classified as significant hazard in California. It was completed in 1872 and is 154 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 48 ft (taller than 57.4% in CA) |
| Dam Length | 433 ft |
| Dam Type | Earth |
| Max Storage | 341 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1872 (154 years old) |
| NID ID | CA00205 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
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 Lagunitas?
Lagunitas is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lagunitas?
Lagunitas is owned by Marin Municipal Water District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lagunitas built?
Lagunitas was completed in 1872, making it 154 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 Lagunitas?
Lagunitas serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lagunitas?
Lagunitas has a dam height of 48 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 Lagunitas last inspected?
Lagunitas was last inspected on September 15, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.