Wamsutter Wastewater is an earth dam located in Sweetwater County, Wyoming, built in 1979. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 2,000 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Wamsutter Wastewater
The primary purpose of Wamsutter Wastewater is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Town of Wamsutter (local government). It impounds the Offchannel.
The dam stands 8 feet tall and stretches 2,000 feet across, creates a reservoir covering 15 acres, and has a maximum storage capacity of 148 acre-feet. Completed in 1979, the structure is 47 years old.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/16/2022.
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Location
| State | Wyoming |
| County | Sweetwater |
| River/Stream | Offchannel |
| Coordinates | 41.67890, -107.96470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 2,000 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 148 acre-ft |
| Max Storage | 148 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 15 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Town of Wamsutter |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/16/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01948 |
| Federal ID | WY01948 |
| More Info | State Dam Safety Program |