Simplot Feeders Waste Pond No1
Simplot Feeders Waste Pond No1 is an earth dam located in Walla Walla County, Washington, built in 1973. It carries a Significant hazard potential classification and has a fair condition assessment.
About Simplot Feeders Waste Pond No1
Simplot Feeders Waste Pond No1 is a dam in Walla Walla, Washington. The dam is owned by Simplot Feeders Llc (private). It impounds the Columbia River-offstream.
The dam stands 15 feet tall and stretches 1,130 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 270 acre-feet, and collects water from a drainage area of 55 square miles. Completed in 1973, 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 10/18/2018.
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Location
| State | Washington |
| County | Walla Walla |
| River/Stream | Columbia River-offstream |
| Coordinates | 46.12479, -118.90563 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Length | 1,130 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 270 acre-ft |
| Max Storage | 270 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 55 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Simplot Feeders LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/18/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00408 |
| Federal ID | WA00408 |
| More Info | State Dam Safety Program |