Blair Mill

TREMPEALEAU· Trempealeau, Wisconsin· Built 1869· Buttress· 13 ft tall
Low Hazard Other Recreation Local Government

Key Takeaway

Blair Mill is classified as low hazard in Wisconsin. It was completed in 1869 and is 157 years old. Its primary use is other.

Physical Details

Dam Height 13 ft (taller than 35.2% in WI)
Dam Length150 ft
Dam TypeButtress
Max Storage170 acre-ft
Normal Storage120 acre-ft
Surface Area44 acres
Drainage Area175 sq mi
Max Discharge1,888 cfs
Year Completed1869 (157 years old)
NID IDWI00319

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: August 14, 2019
State Regulated: Yes
Regulatory Agency: WIDNR

Ownership

City Of Blair

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Blair Mill?

Blair Mill is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Blair Mill?

Blair Mill is owned by City Of Blair (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Blair Mill built?

Blair Mill was completed in 1869, making it 157 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Blair Mill?

Blair Mill serves the following purposes: Other, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Blair Mill?

Blair Mill has a dam height of 13 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Blair Mill last inspected?

Blair Mill was last inspected on August 14, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.