Eightmile Lake Outlet Dam
Key Takeaway
Eightmile Lake Outlet Dam is classified as high hazard in Washington. It was completed in 1933 and is 93 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 | 200 ft |
| Dam Type | Rockfill |
| Max Storage | 1.6K acre-ft |
| Normal Storage | 1.6K acre-ft |
| Surface Area | 65 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1933 (93 years old) |
| NID ID | WA00228 |
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
Icicle & Peshastin Irrigation District
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Eightmile Lake Outlet Dam?
Eightmile Lake Outlet 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 Eightmile Lake Outlet Dam?
Eightmile Lake Outlet Dam is owned by Icicle & Peshastin Irrigation District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Eightmile Lake Outlet Dam built?
Eightmile Lake Outlet Dam was completed in 1933, making it 93 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 Eightmile Lake Outlet Dam?
Eightmile Lake Outlet 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 Eightmile Lake Outlet Dam last inspected?
Eightmile Lake Outlet Dam was last inspected on November 3, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.