Toprail Dam is a gravity dam located in Valley County, Montana. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 616 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 Toprail Dam
Toprail Dam is a dam in Valley, Montana. The dam is owned by Doi BLM (federal). It impounds the Intermittent.
The dam stands 20 feet tall and stretches 616 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 55 acre-feet, and collects water from a drainage area of 0 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 08/16/2016. That was over 10 years ago.
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Location
| State | Montana |
| County | Valley |
| River/Stream | Intermittent |
| Coordinates | 47.96499, -107.18890 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 20 ft |
| Dam Length | 616 ft |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Max Storage | 55 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 08/16/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02773 |
| Federal ID | MT02773 |
| More Info | State Dam Safety Program |