Lewis Dam
Key Takeaway
Lewis Dam is classified as low hazard in Washington. It was completed in 1973 and is 53 years old. Its primary use is recreation.
Physical Details
| Dam Length | 120 ft |
| Dam Type | Earth |
| Max Storage | 330 acre-ft |
| Normal Storage | 300 acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1973 (53 years old) |
| NID ID | WA00189 |
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
MarieCross Calsey
Private
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Low HazardFrequently Asked Questions
What is the hazard classification of Lewis Dam?
Lewis 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 Lewis Dam?
Lewis Dam is owned by MarieCross Calsey (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lewis Dam built?
Lewis Dam was completed in 1973, making it 53 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 Lewis Dam?
Lewis Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.