Anamosa
Key Takeaway
Anamosa is classified as low hazard in Iowa. It was completed in 1909 and is 117 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 12 ft (taller than 3.1% in IA) |
| Dam Length | 228 ft |
| Dam Type | Gravity |
| Max Storage | 650 acre-ft |
| Normal Storage | 650 acre-ft |
| Surface Area | 120 acres |
| Drainage Area | 1,662 sq mi |
| Year Completed | 1909 (117 years old) |
| NID ID | IA01305 |
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
UP Hydro, LLC
Public Utility
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Low Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Anamosa?
Anamosa 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 Anamosa?
Anamosa is owned by UP Hydro, LLC (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Anamosa built?
Anamosa was completed in 1909, making it 117 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 Anamosa?
Anamosa serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Anamosa?
Anamosa has a dam height of 12 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 Anamosa last inspected?
Anamosa was last inspected on May 29, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.