St Ansgar Milldam
Key Takeaway
St Ansgar Milldam is classified as low hazard in Iowa. It was completed in 1919 and is 107 years old. Its primary use is recreation.
Physical Details
| Dam Height | 9 ft (taller than 1.7% in IA) |
| Dam Length | 202 ft |
| Dam Type | Gravity |
| Max Storage | 600 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 780 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1919 (107 years old) |
| NID ID | IA01361 |
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
HL McKinley
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of St Ansgar Milldam?
St Ansgar 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 St Ansgar Milldam?
St Ansgar Milldam is owned by HL McKinley (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was St Ansgar Milldam built?
St Ansgar Milldam was completed in 1919, making it 107 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 St Ansgar Milldam?
St Ansgar 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 St Ansgar Milldam?
St Ansgar Milldam has a dam height of 9 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.