Hopp Dam (Upper Site)
Key Takeaway
Hopp Dam (Upper Site) is classified as low hazard in Iowa. It was completed in 2005 and is 21 years old. Its primary use is grade stabilization.
Physical Details
| Dam Height | 36 ft (taller than 74.2% in IA) |
| Dam Length | 655 ft |
| Dam Type | Earth |
| Max Storage | 87 acre-ft |
| Normal Storage | 46 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 148 cfs |
| Year Completed | 2005 (21 years old) |
| NID ID | IA04068 |
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
Donald Hopp
Private
Nearby Dams
Hopp Dam (Lower Site)
Mills, IA
Low Hazard 30 ftReinert Dam
Mills, IA
Low Hazard 41 ftSchoening Dam
Mills, IA
Low Hazard 42 ftWaubonsie Creek Watershed Sites M-5
Mills, IA
Low Hazard 30 ftMule Creek Watershed Site 1
Mills, IA
Low Hazard 25 ftMule Creek Watershed Site 2
Mills, IA
Low Hazard 25 ftMule Creek Watershed Sta 48+87
Mills, IA
Low Hazard 44 ftStrotenbecker Dam
Mills, IA
Low Hazard 36 ftFrequently Asked Questions
What is the hazard classification of Hopp Dam (Upper Site)?
Hopp Dam (Upper Site) 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 Hopp Dam (Upper Site)?
Hopp Dam (Upper Site) is owned by Donald Hopp (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hopp Dam (Upper Site) built?
Hopp Dam (Upper Site) was completed in 2005, making it 21 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 Hopp Dam (Upper Site)?
Hopp Dam (Upper Site) serves the following purposes: Grade Stabilization, Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hopp Dam (Upper Site)?
Hopp Dam (Upper Site) has a dam height of 36 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.