M Hardy #3 is an earth dam located in Custer County, Montana, built in 1958. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 858 ft long, taller than 62% 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 Hardy #3
The primary purpose of M Hardy #3 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Mary Hardy (private). It impounds the Dawson Creek near Mizpah.
The dam stands 28 feet tall and stretches 858 feet across, and has a maximum storage capacity of 90 acre-feet. Completed in 1958, the structure is well into its service life at over 50 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.
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Location
| State | Montana |
| County | Custer |
| Nearest City | Mizpah |
| River/Stream | Dawson Creek |
| Coordinates | 45.97060, -105.40190 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 858 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 90 acre-ft |
| Max Storage | 90 acre-ft |
| Normal Storage | 53 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Mary Hardy |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01695 |
| Federal ID | MT01695 |
| More Info | State Dam Safety Program |