Moccasin Lake Dam
Key Takeaway
Moccasin Lake Dam is classified as high hazard in Washington. It was completed in 1969 and is 57 years old. Its primary use is irrigation. 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 | 530 ft |
| Dam Type | Earth |
| Max Storage | 261 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 35 cfs |
| Year Completed | 1969 (57 years old) |
| NID ID | WA00053 |
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
Moccasin Lake Ranch #1 Inc.
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Moccasin Lake Dam?
Moccasin 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 Moccasin Lake Dam?
Moccasin Lake Dam is owned by Moccasin Lake Ranch #1 Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Moccasin Lake Dam built?
Moccasin Lake Dam was completed in 1969, making it 57 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 Moccasin Lake Dam?
Moccasin Lake Dam serves the following purposes: Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Moccasin Lake Dam last inspected?
Moccasin Lake Dam was last inspected on November 8, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.