Grandview Wastewater A-cell Lagoon Dam
Grandview Wastewater A-cell Lagoon Dam is a buttress dam located in Yakima County, Washington, built in 1991. It carries a Significant hazard potential classification and has a fair condition assessment.
About Grandview Wastewater A-cell Lagoon Dam
Grandview Wastewater A-cell Lagoon Dam is a dam in Yakima, Washington. The dam is owned by Grandview City Hall (local government). It impounds the Offstream.
The dam stands 7 feet tall and stretches 225 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 85 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1991, the structure is 35 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 10/02/2024.
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Location
| State | Washington |
| County | Yakima |
| River/Stream | Offstream |
| Coordinates | 46.20900, -119.90610 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 7 ft |
| Dam Length | 225 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 85 acre-ft |
| Max Storage | 85 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Grandview City Hall |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/02/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00614 |
| Federal ID | WA00614 |
| More Info | State Dam Safety Program |