Thayer Lake Dam
Key Takeaway
Thayer Lake Dam is classified as low hazard in Iowa. It was completed in 1930 and is 96 years old. Its primary use is recreation.
Physical Details
| Dam Height | 30 ft (taller than 48.2% in IA) |
| Dam Length | 590 ft |
| Dam Type | Earth |
| Max Storage | 222 acre-ft |
| Normal Storage | 91 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1930 (96 years old) |
| Year Modified | 1996 |
| NID ID | IA01377 |
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
Iowa Department of Natural Resources
State Government
Nearby Dams
Kelly Dam
Union, IA
Low Hazard 27 ftBower Off-Road Dam
Union, IA
Low Hazard 32 ftMatthew Brown
Union, IA
Low Hazard 30 ftTalmage Hill Dam
Union, IA
Low Hazard 25 ftHenco Dam
Union, IA
Low Hazard 28 ftAbell Dam
Union, IA
Low Hazard 32 ftIowa Select Farms Dam
Union, IA
Low Hazard 40 ftRidinger Dam
Union, IA
Low Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Thayer Lake Dam?
Thayer Lake Dam 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 Thayer Lake Dam?
Thayer Lake Dam is owned by Iowa Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thayer Lake Dam built?
Thayer Lake Dam was completed in 1930, making it 96 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 Thayer Lake Dam?
Thayer Lake Dam 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 Thayer Lake Dam?
Thayer Lake Dam has a dam height of 30 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 Thayer Lake Dam last inspected?
Thayer Lake Dam was last inspected on October 23, 2003. Inspection dates indicate when a formal review occurred, not the results of that inspection.