Mosinee
Mosinee is a gravity dam located in Marathon County, Wisconsin, built in 1910. It carries a Low hazard potential classification and has a poor condition assessment.
About Mosinee
The primary purpose of Mosinee is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. It impounds the Wisconsin River near Mosinee.
The dam stands 22 feet tall and stretches 923 feet across, creates a reservoir covering 1,377 acres, has a maximum storage capacity of 8,170 acre-feet, and collects water from a drainage area of 4,126 square miles. Completed in 1910, the structure is over a century old.
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 09/14/2022.
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Location
| State | Wisconsin |
| County | Marathon |
| Nearest City | Mosinee |
| River/Stream | Wisconsin River |
| Coordinates | 44.79070, -89.69530 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 923 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 8,170 acre-ft |
| Max Storage | 8,170 acre-ft |
| Normal Storage | 8,170 acre-ft |
| Surface Area | 1,377 acres |
| Drainage Area | 4,126 sq mi |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Not Listed |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/14/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WI00750 |
| Federal ID | WI00750 |
| More Info | State Dam Safety Program |