Prairie
Prairie is an earth dam located in Fremont County, Wyoming, built in 1915. It carries a Low hazard potential classification and has a poor condition assessment.
About Prairie
The primary purpose of Prairie is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wind River Indian Reservation / Nick Penton (private). It impounds the Dry Muddy Creek near See Remarks.
The dam stands 17 feet tall and stretches 1,840 feet across, creates a reservoir covering 82 acres, and has a maximum storage capacity of 771 acre-feet. Completed in 1915, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/04/2025.
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Location
| State | Wyoming |
| County | Fremont |
| Nearest City | See Remarks |
| River/Stream | Dry Muddy Creek |
| Coordinates | 43.48870, -108.88640 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 1,840 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 771 acre-ft |
| Max Storage | 771 acre-ft |
| Normal Storage | 578 acre-ft |
| Surface Area | 82 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WIND RIVER INDIAN RESERVATION / NICK PENTON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/04/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00896 |
| Federal ID | WY00896 |
| More Info | State Dam Safety Program |