Chapman Lake Dam
Key Takeaway
Chapman Lake Dam is classified as low hazard in Washington. It was completed in 1940 and is 86 years old. Its primary use is recreation.
Physical Details
| Dam Length | 75 ft |
| Dam Type | Gravity |
| Max Storage | 8.0K acre-ft |
| Normal Storage | 7.5K acre-ft |
| Surface Area | 150 acres |
| Drainage Area | 49 sq mi |
| Max Discharge | 5,000 cfs |
| Year Completed | 1940 (86 years old) |
| NID ID | WA00303 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Jones Trust
Private
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Low HazardFrequently Asked Questions
What is the hazard classification of Chapman Lake Dam?
Chapman Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Chapman Lake Dam?
Chapman Lake Dam is owned by Jones Trust (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Chapman Lake Dam built?
Chapman Lake Dam was completed in 1940, making it 86 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 Chapman Lake Dam?
Chapman Lake Dam 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 Chapman Lake Dam last inspected?
Chapman Lake Dam was last inspected on October 27, 1993. Inspection dates indicate when a formal review occurred, not the results of that inspection.