Pine Grove
Key Takeaway
Pine Grove is classified as low hazard in California. It was completed in 1911 and is 115 years old. Its primary use is water supply.
Physical Details
| Dam Height | 42 ft (taller than 50.1% in CA) |
| Dam Length | 610 ft |
| Dam Type | Earth |
| Max Storage | 155 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1911 (115 years old) |
| NID ID | CA00541 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
San Juan Ridge County Water District
Public Utility
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Low Hazard 48 ftFrequently Asked Questions
What is the hazard classification of Pine Grove?
Pine Grove is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Pine Grove?
Pine Grove is owned by San Juan Ridge County Water District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pine Grove built?
Pine Grove was completed in 1911, making it 115 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 Pine Grove?
Pine Grove serves the following purposes: Water Supply, Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Pine Grove?
Pine Grove has a dam height of 42 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 Pine Grove last inspected?
Pine Grove was last inspected on June 8, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.