Grant Dam is a gravity dam located in Prairie County, Montana. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 351 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Grant Dam
Grant Dam is a dam in Prairie, Montana. The dam is owned by Doi BLM (federal). It impounds the Unnamed Drainage.
The dam stands 19 feet tall and stretches 351 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 55 acre-feet, and collects water from a drainage area of 5 square miles.
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. The most recent inspection on record was 09/05/2018.
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Location
| State | Montana |
| County | Prairie |
| River/Stream | Unnamed Drainage |
| Coordinates | 46.87298, -105.64685 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 19 ft |
| Dam Length | 351 ft |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Max Storage | 55 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 5 sq mi |
Ownership & Safety
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/05/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02262 |
| Federal ID | MT02262 |
| More Info | State Dam Safety Program |