Ganzhorn Dam
Key Takeaway
Ganzhorn Dam is classified as low hazard in Iowa. It was completed in 1970 and is 56 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 30 ft (taller than 48.2% in IA) |
| Dam Length | 356 ft |
| Dam Type | Earth |
| Max Storage | 60 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | IA00449 |
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
Henry Ganzhorn
Private
Nearby Dams
Iowa Noname70
Harrison, IA
Low Hazard 31 ftWillow Lake Dam
Harrison, IA
Low Hazard 31 ftRamsey Dam
Harrison, IA
Low Hazard 43 ftKasparbauer
Harrison, IA
Low Hazard 49 ftRager Dam
Harrison, IA
Low Hazard 58 ftJohnson (Oscar) Dam
Harrison, IA
Low Hazard 49 ftWinner Dam
Harrison, IA
Low Hazard 41 ftBrummer Dam
Harrison, IA
Low Hazard 41 ftFrequently Asked Questions
What is the hazard classification of Ganzhorn Dam?
Ganzhorn 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 Ganzhorn Dam?
Ganzhorn Dam is owned by Henry Ganzhorn (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Ganzhorn Dam built?
Ganzhorn Dam was completed in 1970, making it 56 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 Ganzhorn Dam?
Ganzhorn Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Ganzhorn Dam?
Ganzhorn 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.