Cow Lake Dam
Key Takeaway
Cow Lake Dam is classified as low hazard in Washington. It was completed in 1935 and is 91 years old. Its primary use is irrigation.
Physical Details
| Dam Length | 600 ft |
| Dam Type | Gravity |
| Max Storage | 900 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 240 acres |
| Drainage Area | 315 sq mi |
| Max Discharge | 95 cfs |
| Year Completed | 1935 (91 years old) |
| NID ID | WA01267 |
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
JohnHarder
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Cow Lake Dam?
Cow 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 Cow Lake Dam?
Cow Lake Dam is owned by JohnHarder (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cow Lake Dam built?
Cow Lake Dam was completed in 1935, making it 91 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 Cow Lake Dam?
Cow 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.