Mayns Dam is an earth dam located in Meagher County, Montana, built in 1940. It carries a Low hazard potential classification.
Dam profile
NID height · 14 ft14 ft tall and 450 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 Mayns Dam
The primary purpose of Mayns Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by B & W Ranch Ltd Partnership (private). It impounds the Tr-mayns Creek near White Sulphur Springs.
The dam stands 14 feet tall and stretches 450 feet across, and has a maximum storage capacity of 54 acre-feet. Completed in 1940, the structure is well-established, with more than 75 years of service.
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.
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Location
| State | Montana |
| County | Meagher |
| Nearest City | White Sulphur Springs |
| River/Stream | Tr-mayns Creek |
| Coordinates | 46.39110, -110.95540 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 450 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 20 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | B & W Ranch Ltd Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03276 |
| Federal ID | MT03276 |
| More Info | State Dam Safety Program |