Winkum Dam is a gravity dam located in Valley County, Montana. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 28 ft28 ft tall and 774 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 concrete gravity section and the water level is illustrative.
About Winkum Dam
Winkum Dam is a dam in Valley, Montana. The dam is owned by Doi BLM (federal). It impounds the Middle Fork Lone Tree Creek.
The dam stands 28 feet tall and stretches 774 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 72 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/05/2019.
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Location
| State | Montana |
| County | Valley |
| River/Stream | Middle Fork Lone Tree Creek |
| Coordinates | 47.97849, -107.23818 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 28 ft |
| Dam Length | 774 ft |
Storage & Hydraulics
| NID Storage | 72 acre-ft |
| Max Storage | 72 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/05/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02614 |
| Federal ID | MT02614 |
| More Info | State Dam Safety Program |