Walla Walla Effluent Storage Lagoon
Walla Walla Effluent Storage Lagoon is an earth dam located in Walla Walla County, Washington, built in 2008. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Walla Walla Effluent Storage Lagoon
Walla Walla Effluent Storage Lagoon is a dam in Walla Walla, Washington. The dam is owned by Walla Walla City (local government).
The dam stands 19 feet tall and stretches 1,800 feet across, creates a reservoir covering 5 acres, and has a maximum storage capacity of 97 acre-feet. Completed in 2008, the structure is relatively new.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/17/2024.
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Location
| State | Washington |
| County | Walla Walla |
| Nearest City | Walla Walla |
| Coordinates | 46.07635, -118.38132 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Length | 1,800 ft |
| Year Completed | 2008 (18 years old) |
Storage & Hydraulics
| NID Storage | 97 acre-ft |
| Max Storage | 97 acre-ft |
| Normal Storage | 78 acre-ft |
| Surface Area | 5 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Walla Walla City |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/17/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00708 |
| Federal ID | WA00708 |
| More Info | State Dam Safety Program |