Horn School Rest Area Sewage Lagoon
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Washington |
| County | Whitman |
| River/Stream | Offstream |
| Coordinates | 47.18364, -117.37695 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1996 (30 years old) |
Storage & Hydraulics
| NID Storage | 22 acre-ft |
| Max Storage | 22 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 2 acres |
| Max Discharge | 10 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | WA DOT |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/02/2021 |
| Emergency Action Plan | Yes |