Spirit Lake Outlet Tunnel
Key Takeaway
Spirit Lake Outlet Tunnel is classified as unknown in Washington. It was completed in 1985 and is 41 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 184 ft (taller than 73.9% in WA) |
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 57.0K acre-ft |
| Normal Storage | 13.0K acre-ft |
| Surface Area | 2,200 acres |
| Max Discharge | 570 cfs |
| Year Completed | 1985 (41 years old) |
| NID ID | WA00770 |
Safety Information
Hazard potential has not been determined.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
USDA FS
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Spirit Lake Outlet Tunnel?
Spirit Lake Outlet Tunnel is classified as Unknown. Hazard potential has not been determined. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Spirit Lake Outlet Tunnel?
Spirit Lake Outlet Tunnel is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Spirit Lake Outlet Tunnel built?
Spirit Lake Outlet Tunnel was completed in 1985, making it 41 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 Spirit Lake Outlet Tunnel?
Spirit Lake Outlet Tunnel serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Spirit Lake Outlet Tunnel?
Spirit Lake Outlet Tunnel has a dam height of 184 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Spirit Lake Outlet Tunnel last inspected?
Spirit Lake Outlet Tunnel was last inspected on October 6, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.