Manchester Milldam
Key Takeaway
Manchester Milldam is classified as low hazard in Iowa. It was completed in 1905 and is 121 years old. Its primary use is recreation.
Physical Details
| Dam Height | 11 ft (taller than 2.5% in IA) |
| Dam Length | 201 ft |
| Dam Type | Gravity |
| Max Storage | 395 acre-ft |
| Normal Storage | 395 acre-ft |
| Surface Area | 70 acres |
| Drainage Area | 268 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1905 (121 years old) |
| NID ID | IA01303 |
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
Alliant Power Co
Public Utility
Nearby Dams
Quaker Mills Milldam
Delaware, IA
Low Hazard 20 ftFrancois Dam
Delaware, IA
Low Hazard 15 ftBaumgartner Dam
Delaware, IA
Low Hazard 13 ftLake Delhi Dam
Delaware, IA
Significant Hazard 55 ftBackbone Dam
Delaware, IA
Significant Hazard 33 ftSilver Lake Dam
Delaware, IA
Low Hazard 25 ftHunt Dam
Delaware, IA
Low Hazard 26 ftDzaboff Dam
Delaware, IA
Low Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Manchester Milldam?
Manchester Milldam 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 Manchester Milldam?
Manchester Milldam is owned by Alliant Power Co (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Manchester Milldam built?
Manchester Milldam was completed in 1905, making it 121 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 Manchester Milldam?
Manchester Milldam 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 Manchester Milldam?
Manchester Milldam 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 Manchester Milldam last inspected?
Manchester Milldam was last inspected on October 25, 1989. Inspection dates indicate when a formal review occurred, not the results of that inspection.