Heston/Johnson Dam
Key Takeaway
Heston/Johnson Dam is classified as low hazard in Iowa. It was completed in 1978 and is 48 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 31 ft (taller than 53.8% in IA) |
| Dam Length | 435 ft |
| Dam Type | Earth |
| Max Storage | 62 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1978 (48 years old) |
| NID ID | IA02114 |
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
H Heston & G Johnson
Private
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Low Hazard 38 ftFrequently Asked Questions
What is the hazard classification of Heston/Johnson Dam?
Heston/Johnson 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 Heston/Johnson Dam?
Heston/Johnson Dam is owned by H Heston & G Johnson (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Heston/Johnson Dam built?
Heston/Johnson Dam was completed in 1978, making it 48 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 Heston/Johnson Dam?
Heston/Johnson 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 Heston/Johnson Dam?
Heston/Johnson Dam has a dam height of 31 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.