Roche Harbor Lake Dam
Key Takeaway
Roche Harbor Lake Dam is classified as high hazard in Washington. It was completed in 2013 and is 13 years old. Its primary use is water supply. 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 Length | 315 ft |
| Dam Type | Earth |
| Max Storage | 629 acre-ft |
| Normal Storage | 526 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 272 cfs |
| Year Completed | 2013 (13 years old) |
| NID ID | WA00444 |
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
Roche Harbor Investments Inc c/o Saltch
Private
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Low HazardFrequently Asked Questions
What is the hazard classification of Roche Harbor Lake Dam?
Roche Harbor Lake 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 Roche Harbor Lake Dam?
Roche Harbor Lake Dam is owned by Roche Harbor Investments Inc c/o Saltch (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Roche Harbor Lake Dam built?
Roche Harbor Lake Dam was completed in 2013, making it 13 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 Roche Harbor Lake Dam?
Roche Harbor Lake Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Roche Harbor Lake Dam last inspected?
Roche Harbor Lake Dam was last inspected on April 21, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.