Fall River Weir
Key Takeaway
Fall River Weir is classified as low hazard in California. It was completed in 1921 and is 105 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 8 ft (taller than 0.7% in CA) |
| Dam Length | 190 ft |
| Dam Type | Concrete |
| Normal Storage | 50 acre-ft |
| Surface Area | 1 acres |
| Year Completed | 1921 (105 years old) |
| NID ID | CA10430 |
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
Pacific Gas and Electric Company
Private
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Fall River Weir?
Fall River Weir 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 Fall River Weir?
Fall River Weir is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Fall River Weir built?
Fall River Weir was completed in 1921, making it 105 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 Fall River Weir?
Fall River Weir 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 Fall River Weir?
Fall River Weir has a dam height of 8 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 Fall River Weir last inspected?
Fall River Weir was last inspected on September 11, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.