Bumping Lake
Key Takeaway
Bumping Lake is classified as high hazard in Washington. It was completed in 1910 and is 116 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 | 44 ft (taller than 45.7% in WA) |
| Dam Length | 2,925 ft |
| Dam Type | Earth |
| Max Storage | 37.7K acre-ft |
| Normal Storage | 33.7K acre-ft |
| Surface Area | 1,303 acres |
| Drainage Area | 69 sq mi |
| Max Discharge | 3,400 cfs |
| Year Completed | 1910 (116 years old) |
| NID ID | WA00263 |
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
Frequently Asked Questions
What is the hazard classification of Bumping Lake?
Bumping Lake 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 Bumping Lake?
Bumping Lake is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Bumping Lake built?
Bumping Lake was completed in 1910, making it 116 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 Bumping Lake?
Bumping Lake 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 Bumping Lake?
Bumping Lake has a dam height of 44 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 Bumping Lake last inspected?
Bumping Lake was last inspected on August 18, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.