Little Mountain
Key Takeaway
Little Mountain is classified as high hazard in California. It was completed in 1958 and is 68 years old. Its primary use is flood risk reduction. 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 | 28 ft (taller than 27.2% in CA) |
| Dam Length | 2,100 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 5 sq mi |
| Year Completed | 1958 (68 years old) |
| NID ID | CA00318 |
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
County of San Bernardino Department of Public Works
Local Government
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Little Mountain?
Little Mountain 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 Little Mountain?
Little Mountain is owned by County of San Bernardino Department of Public Works (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Little Mountain built?
Little Mountain was completed in 1958, making it 68 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 Little Mountain?
Little Mountain serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Little Mountain?
Little Mountain has a dam height of 28 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 Little Mountain last inspected?
Little Mountain was last inspected on February 16, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.