West Richland Sewage Lagoon North
West Richland Sewage Lagoon North is an earth dam located in Benton County, Washington, built in 1961. It carries a Significant hazard potential classification and has a fair condition assessment.
About West Richland Sewage Lagoon North
West Richland Sewage Lagoon North is a dam in Benton, Washington. The dam is owned by West Richland City (local government). It impounds the Tr-yakima River-offstream near West Richland.
The dam stands 7 feet tall, creates a reservoir covering 35 acres, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 04/19/2016.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Benton |
| Nearest City | West Richland |
| River/Stream | Tr-yakima River-offstream |
| Coordinates | 46.30615, -119.34027 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | West Richland City |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/19/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA01734 |
| Federal ID | WA01734 |
| More Info | State Dam Safety Program |