Electra Afterbay
Key Takeaway
Electra Afterbay is classified as low hazard in California. It was completed in 1948 and is 78 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 30 ft (taller than 30.4% in CA) |
| Dam Length | 319 ft |
| Dam Type | Concrete |
| Max Storage | 50 acre-ft |
| Normal Storage | 1 acre-ft |
| Surface Area | 1 acres |
| Year Completed | 1948 (78 years old) |
| NID ID | CA10426 |
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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High Hazard 120 ftFrequently Asked Questions
What is the hazard classification of Electra Afterbay?
Electra Afterbay 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 Electra Afterbay?
Electra Afterbay is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Electra Afterbay built?
Electra Afterbay was completed in 1948, making it 78 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 Electra Afterbay?
Electra Afterbay 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 Electra Afterbay?
Electra Afterbay has a dam height of 30 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 Electra Afterbay last inspected?
Electra Afterbay was last inspected on June 14, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.