Marble Rock Milldam
Key Takeaway
Marble Rock Milldam is classified as low hazard in Iowa. It was completed in 1913 and is 113 years old. Its primary use is recreation.
Physical Details
| Dam Height | 15 ft (taller than 4.4% in IA) |
| Dam Length | 187 ft |
| Dam Type | Gravity |
| Max Storage | 836 acre-ft |
| Normal Storage | 836 acre-ft |
| Surface Area | 110 acres |
| Drainage Area | 1,318 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1913 (113 years old) |
| NID ID | IA01309 |
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
City of Marble Rock
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Marble Rock Milldam?
Marble Rock 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 Marble Rock Milldam?
Marble Rock Milldam is owned by City of Marble Rock (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Marble Rock Milldam built?
Marble Rock Milldam was completed in 1913, making it 113 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 Marble Rock Milldam?
Marble Rock 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 Marble Rock Milldam?
Marble Rock Milldam has a dam height of 15 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 Marble Rock Milldam last inspected?
Marble Rock Milldam was last inspected on December 12, 1989. Inspection dates indicate when a formal review occurred, not the results of that inspection.