Mcmillan Marsh
Key Takeaway
Mcmillan Marsh is classified as low hazard in Wisconsin. It was completed in 1971 and is 55 years old. Its primary use is water supply.
Physical Details
| Dam Height | 11 ft (taller than 24.3% in WI) |
| Dam Length | 7,900 ft |
| Dam Type | Earth |
| Max Storage | 4.9K acre-ft |
| Normal Storage | 2.8K acre-ft |
| Surface Area | 690 acres |
| Drainage Area | 50 sq mi |
| Year Completed | 1971 (55 years old) |
| NID ID | WI00881 |
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
Wisconsin Department of Natural Resources
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mcmillan Marsh?
Mcmillan Marsh 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 Mcmillan Marsh?
Mcmillan Marsh is owned by Wisconsin Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mcmillan Marsh built?
Mcmillan Marsh was completed in 1971, making it 55 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 Mcmillan Marsh?
Mcmillan Marsh serves the following purposes: Water Supply, Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mcmillan Marsh?
Mcmillan Marsh has a dam height of 11 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 Mcmillan Marsh last inspected?
Mcmillan Marsh was last inspected on November 3, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.