Blair Mill
Blair Mill is a buttress dam located in Trempealeau County, Wisconsin, built in 1869. It carries a Low hazard potential classification and has a fair condition assessment.
About Blair Mill
Blair Mill is a dam in Trempealeau, Wisconsin. The dam is owned by City Of Blair (local government). It impounds the Trempealeau near Blair.
The dam stands 13 feet tall and stretches 150 feet across, creates a reservoir covering 44 acres, has a maximum storage capacity of 170 acre-feet, and collects water from a drainage area of 175 square miles. Completed in 1869, the structure is one of the older dams in the region, with over a century and a half 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/14/2019.
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Location
| State | Wisconsin |
| County | Trempealeau |
| Nearest City | Blair |
| River/Stream | Trempealeau |
| Coordinates | 44.29943, -91.23241 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 150 ft |
| Year Completed | 1869 (157 years old) |
Storage & Hydraulics
| NID Storage | 170 acre-ft |
| Max Storage | 170 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 44 acres |
| Drainage Area | 175 sq mi |
| Max Discharge | 1,888 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | City Of Blair |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/14/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00319 |
| Federal ID | WI00319 |
| More Info | State Dam Safety Program |