Mill Pond
Key Takeaway
Mill Pond is classified as significant hazard in California. It was completed in 1956 and is 70 years old. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 21 ft (taller than 17.3% in CA) |
| Dam Length | 280 ft |
| Dam Type | Earth |
| Max Storage | 75 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | CA10368 |
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
DOI NPS
Federal Government
Nearby Dams
Hagmaier South
Marin, CA
Significant Hazard 25 ftPeters
Marin, CA
High Hazard 230 ftSeeger
Marin, CA
High Hazard 115 ftAlpine
Marin, CA
High Hazard 143 ftBig Rock Ranch
Marin, CA
High Hazard 45 ftBon Tempe
Marin, CA
High Hazard 98 ftHome Ranch Dam
Marin, CA
Significant Hazard 23 ftLagunitas
Marin, CA
Significant Hazard 48 ftFrequently Asked Questions
What is the hazard classification of Mill Pond?
Mill Pond 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 Mill Pond?
Mill Pond is owned by DOI NPS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill Pond built?
Mill Pond was completed in 1956, making it 70 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Mill Pond?
Mill Pond has a dam height of 21 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 Mill Pond last inspected?
Mill Pond was last inspected on December 6, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.