Blackhawk Lake
Key Takeaway
Blackhawk Lake is classified as low hazard in Wisconsin. It was completed in 1969 and is 57 years old. Its primary use is recreation.
Physical Details
| Dam Height | 50 ft (taller than 97.5% in WI) |
| Dam Length | 1,130 ft |
| Dam Type | Earth |
| Max Storage | 7.9K acre-ft |
| Normal Storage | 3.8K acre-ft |
| Surface Area | 220 acres |
| Drainage Area | 16 sq mi |
| Max Discharge | 460 cfs |
| Year Completed | 1969 (57 years old) |
| NID ID | WI00014 |
Safety Information
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?
Ownership
Iowa County
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Blackhawk Lake?
Blackhawk Lake 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 Blackhawk Lake?
Blackhawk Lake is owned by Iowa County (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blackhawk Lake built?
Blackhawk Lake was completed in 1969, making it 57 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 Blackhawk Lake?
Blackhawk Lake serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Blackhawk Lake?
Blackhawk Lake has a dam height of 50 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 Blackhawk Lake last inspected?
Blackhawk Lake was last inspected on June 2, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.