Rocky Reach
Key Takeaway
Rocky Reach is classified as high hazard in Washington. It was completed in 1962 and is 64 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 | 118 ft (taller than 65.2% in WA) |
| Dam Length | 3,820 ft |
| Dam Type | Gravity |
| Max Storage | 390.0K acre-ft |
| Normal Storage | 382.0K acre-ft |
| Surface Area | 9,810 acres |
| Drainage Area | 87,800 sq mi |
| Max Discharge | 1,200,000 cfs |
| Year Completed | 1962 (64 years old) |
| NID ID | WA00086 |
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
PUD #1 of Chelan County, WA
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Rocky Reach?
Rocky Reach 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 Rocky Reach?
Rocky Reach is owned by PUD #1 of Chelan County, WA (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rocky Reach built?
Rocky Reach was completed in 1962, making it 64 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 Rocky Reach?
Rocky Reach serves the following purposes: Hydroelectric, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Rocky Reach?
Rocky Reach has a dam height of 118 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 Rocky Reach last inspected?
Rocky Reach was last inspected on June 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.