Ririe
Key Takeaway
Ririe is classified as high hazard in Idaho. It was completed in 1976 and is 50 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 | 253 ft (taller than 97.9% in ID) |
| Dam Length | 1,070 ft |
| Dam Type | Rockfill |
| Max Storage | 100.5K acre-ft |
| Normal Storage | 90.5K acre-ft |
| Surface Area | 1,560 acres |
| Drainage Area | 487 sq mi |
| Max Discharge | 40,000 cfs |
| Year Completed | 1976 (50 years old) |
| NID ID | ID00344 |
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 Ririe?
Ririe 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 Ririe?
Ririe is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Ririe built?
Ririe was completed in 1976, making it 50 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 Ririe?
Ririe serves the following purposes: Flood Risk Reduction, Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Ririe?
Ririe has a dam height of 253 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 Ririe last inspected?
Ririe was last inspected on May 12, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.