Agency Valley
Key Takeaway
Agency Valley is classified as high hazard in Oregon. It was completed in 1934 and is 92 years old. Its primary use is flood risk reduction. 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 | 110 ft (taller than 94.6% in OR) |
| Dam Length | 1,867 ft |
| Dam Type | Earth |
| Max Storage | 66.0K acre-ft |
| Normal Storage | 59.2K acre-ft |
| Surface Area | 1,912 acres |
| Drainage Area | 444 sq mi |
| Max Discharge | 12,100 cfs |
| Year Completed | 1934 (92 years old) |
| NID ID | OR00589 |
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
RECLAMATION
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Agency Valley?
Agency Valley 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 Agency Valley?
Agency Valley is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Agency Valley built?
Agency Valley was completed in 1934, making it 92 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 Agency Valley?
Agency Valley serves the following purposes: Flood Risk Reduction, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Agency Valley?
Agency Valley has a dam height of 110 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 Agency Valley last inspected?
Agency Valley was last inspected on August 5, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.