M. W. Reservoir is an earth dam located in Weston County, Wyoming, built in 1912. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 1,240 ft long, taller than 80% of U.S. dams with a recorded height. 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 M. W. Reservoir
The primary purpose of M. W. Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Baldwin Gene Ranch, LLC, Att: Donna Hunt (private). It impounds the Stockade Beaver Creek near Edgemont, Sd.
The dam stands 35 feet tall and stretches 1,240 feet across, creates a reservoir covering 122 acres, and has a maximum storage capacity of 2,410 acre-feet. Completed in 1912, 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 05/01/2025.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Wyoming |
| County | Weston |
| Nearest City | Edgemont, Sd |
| River/Stream | Stockade Beaver Creek |
| Coordinates | 43.61670, -104.12280 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 1,240 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 2,410 acre-ft |
| Max Storage | 2,410 acre-ft |
| Normal Storage | 1,810 acre-ft |
| Surface Area | 122 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Baldwin Gene Ranch, LLC, Att: Donna Hunt |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/01/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00874 |
| Federal ID | WY00874 |
| More Info | State Dam Safety Program |