Tree Top Prosser Lagoons 2 & 3
Tree Top Prosser Lagoons 2 & 3 is an earth dam located in Benton County, Washington, built in 1991. It carries a Significant hazard potential classification and has a fair condition assessment.
About Tree Top Prosser Lagoons 2 & 3
Tree Top Prosser Lagoons 2 & 3 is a dam in Benton, Washington. The dam is owned by Tree Top Inc (private). It impounds the Offstream.
The dam stands 18 feet tall and stretches 3,925 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 163 acre-feet, and collects water from a drainage area of 2 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 04/20/2016.
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Location
| State | Washington |
| County | Benton |
| River/Stream | Offstream |
| Coordinates | 46.22208, -119.74472 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Length | 3,925 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 163 acre-ft |
| Max Storage | 163 acre-ft |
| Normal Storage | 130 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Tree Top Inc |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/20/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00609 |
| Federal ID | WA00609 |
| More Info | State Dam Safety Program |