Lake Thibadeau Dam
Lake Thibadeau Dam is an earth dam located in Hill County, Montana, built in 1938. It carries a Low hazard potential classification and has a poor condition assessment.
About Lake Thibadeau Dam
The primary purpose of Lake Thibadeau Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Us Fish And Wildlife Service (federal). It impounds the Rock Coulee-tr.
The dam stands 18 feet tall and stretches 380 feet across, creates a reservoir covering 235 acres, has a maximum storage capacity of 4,445 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1938, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 09/23/2020.
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Location
| State | Montana |
| County | Hill |
| River/Stream | Rock Coulee-tr |
| Coordinates | 48.75667, -109.60166 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 380 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 4,445 acre-ft |
| Max Storage | 4,445 acre-ft |
| Normal Storage | 3,182 acre-ft |
| Surface Area | 235 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 277 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | US FISH AND WILDLIFE SERVICE |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/23/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00283 |
| Federal ID | MT00283 |
| More Info | State Dam Safety Program |