Big Cliff Dam
Key Takeaway
Big Cliff Dam is classified as high hazard in Oregon. It was completed in 1954 and is 72 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 | 131 ft (taller than 96.5% in OR) |
| Dam Length | 280 ft |
| Dam Type | Gravity |
| Max Storage | 5.9K acre-ft |
| Normal Storage | 2.6K acre-ft |
| Surface Area | 141 acres |
| Drainage Area | 452 sq mi |
| Max Discharge | 176,000 cfs |
| Year Completed | 1954 (72 years old) |
| NID ID | OR00003 |
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
USACE - Portland District
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Big Cliff Dam?
Big Cliff Dam 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 Big Cliff Dam?
Big Cliff Dam is owned by USACE - Portland District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big Cliff Dam built?
Big Cliff Dam was completed in 1954, making it 72 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 Big Cliff Dam?
Big Cliff Dam 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 Big Cliff Dam?
Big Cliff Dam has a dam height of 131 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 Big Cliff Dam last inspected?
Big Cliff Dam was last inspected on May 10, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.