Koa Dam No 1
Key Takeaway
Koa Dam No 1 is classified as low hazard in Washington. It was completed in 1965 and is 61 years old. Its primary use is recreation.
Physical Details
| Dam Length | 330 ft |
| Dam Type | Earth |
| Max Storage | 67 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 162 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | WA00110 |
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
Mhc Ltra Inc
Private
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High Hazard 366 ftFrequently Asked Questions
What is the hazard classification of Koa Dam No 1?
Koa Dam No 1 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 Koa Dam No 1?
Koa Dam No 1 is owned by Mhc Ltra Inc (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Koa Dam No 1 built?
Koa Dam No 1 was completed in 1965, making it 61 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 Koa Dam No 1?
Koa Dam No 1 serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.