Lower Bear
Key Takeaway
Lower Bear is classified as high hazard in California. It was completed in 1952 and is 74 years old. Its primary use is hydroelectric. 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 | 245 ft (taller than 96.9% in CA) |
| Dam Length | 1,844 ft |
| Dam Type | Rockfill |
| Max Storage | 52.0K acre-ft |
| Normal Storage | 49.1K acre-ft |
| Surface Area | 746 acres |
| Drainage Area | 37 sq mi |
| Max Discharge | 22,210 cfs |
| Year Completed | 1952 (74 years old) |
| NID ID | CA00409 |
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
Pacific Gas and Electric Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lower Bear?
Lower Bear 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 Lower Bear?
Lower Bear is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Bear built?
Lower Bear was completed in 1952, making it 74 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 Lower Bear?
Lower Bear serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lower Bear?
Lower Bear has a dam height of 245 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 Lower Bear last inspected?
Lower Bear was last inspected on July 11, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.