Horn School Rest Area Sewage Lagoon
Key Takeaway
Horn School Rest Area Sewage Lagoon is classified as high hazard in Washington. It was completed in 1996 and is 30 years old. Its primary use is other. 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 | 1,200 ft |
| Dam Type | Earth |
| Max Storage | 22 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 10 cfs |
| Year Completed | 1996 (30 years old) |
| NID ID | WA01766 |
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
WA DOT
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Horn School Rest Area Sewage Lagoon?
Horn School Rest Area Sewage Lagoon 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 Horn School Rest Area Sewage Lagoon?
Horn School Rest Area Sewage Lagoon is owned by WA DOT (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Horn School Rest Area Sewage Lagoon built?
Horn School Rest Area Sewage Lagoon was completed in 1996, making it 30 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 Horn School Rest Area Sewage Lagoon?
Horn School Rest Area Sewage Lagoon serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Horn School Rest Area Sewage Lagoon last inspected?
Horn School Rest Area Sewage Lagoon was last inspected on July 18, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.