Sylvia Lake Dam Grays Harbor Cnty
Key Takeaway
Sylvia Lake Dam Grays Harbor Cnty is classified as high hazard in Washington. It was completed in 1918 and is 108 years old. Its primary use is recreation. 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 | 120 ft |
| Dam Type | Buttress |
| Max Storage | 550 acre-ft |
| Normal Storage | 320 acre-ft |
| Surface Area | 32 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,510 cfs |
| Year Completed | 1918 (108 years old) |
| NID ID | WA00132 |
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
WA PARKS
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Sylvia Lake Dam Grays Harbor Cnty?
Sylvia Lake Dam Grays Harbor Cnty 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 Sylvia Lake Dam Grays Harbor Cnty?
Sylvia Lake Dam Grays Harbor Cnty is owned by WA PARKS (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sylvia Lake Dam Grays Harbor Cnty built?
Sylvia Lake Dam Grays Harbor Cnty was completed in 1918, making it 108 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 Sylvia Lake Dam Grays Harbor Cnty?
Sylvia Lake Dam Grays Harbor Cnty serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Sylvia Lake Dam Grays Harbor Cnty last inspected?
Sylvia Lake Dam Grays Harbor Cnty was last inspected on December 21, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.