Cape Horn
Key Takeaway
Cape Horn is classified as high hazard in California. It was completed in 1907 and is 119 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 | 60 ft (taller than 67.2% in CA) |
| Dam Length | 520 ft |
| Dam Type | Earth |
| Max Storage | 390 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 65 acres |
| Drainage Area | 349 sq mi |
| Max Discharge | 115,000 cfs |
| Year Completed | 1907 (119 years old) |
| NID ID | CA00399 |
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 Cape Horn?
Cape Horn 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 Cape Horn?
Cape Horn is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cape Horn built?
Cape Horn was completed in 1907, making it 119 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 Cape Horn?
Cape Horn 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 Cape Horn?
Cape Horn has a dam height of 60 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 Cape Horn last inspected?
Cape Horn was last inspected on June 28, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.