Kennedy & Johns Dam
Key Takeaway
Kennedy & Johns Dam is classified as significant hazard in Iowa. It was completed in 1975 and is 51 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 40 ft (taller than 84% in IA) |
| Dam Length | 520 ft |
| Dam Type | Earth |
| Max Storage | 178 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1975 (51 years old) |
| NID ID | IA01676 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
S Kennedy & D Johns
Private
Nearby Dams
South Hungerford 2 Watershed Site 4
Plymouth, IA
Low Hazard 27 ftDiede Dam
Plymouth, IA
Low Hazard 27 ftDiede Dam
Woodbury, IA
Low Hazard 27 ftBacon Creek Watershed Site M-1
Plymouth, IA
Low Hazard 32 ftSouth Hungerford 2 Watershed Site 11
Plymouth, IA
Low Hazard 40 ftBacon Creek Watershed Site L-1
Plymouth, IA
Low Hazard 53 ftSouth Hungerford 2 Watershed Site 5
Plymouth, IA
Low Hazard 28 ftSouth Hungerford 2 Watershed Site 9
Plymouth, IA
Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Kennedy & Johns Dam?
Kennedy & Johns Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Kennedy & Johns Dam?
Kennedy & Johns Dam is owned by S Kennedy & D Johns (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Kennedy & Johns Dam built?
Kennedy & Johns Dam was completed in 1975, making it 51 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 Kennedy & Johns Dam?
Kennedy & Johns 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 Kennedy & Johns Dam?
Kennedy & Johns Dam has a dam height of 40 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.