Grimes Dam is an earth dam located in Custer County, Montana, built in 1950. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 625 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 Grimes Dam
The primary purpose of Grimes 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 6 Ranch Inc (private). It impounds the Grimes Creek near Kinsey.
The dam stands 16 feet tall and stretches 625 feet across, and has a maximum storage capacity of 188 acre-feet. Completed in 1950, 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 | Custer |
| Nearest City | Kinsey |
| River/Stream | Grimes Creek |
| Coordinates | 46.74700, -106.02560 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 625 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 188 acre-ft |
| Max Storage | 188 acre-ft |
| Normal Storage | 79 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | B 6 Ranch Inc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01816 |
| Federal ID | MT01816 |
| More Info | State Dam Safety Program |