Marlo Johnson
Key Takeaway
Marlo Johnson is classified as low hazard in South Dakota. It was completed in 1959 and is 67 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 31 ft (taller than 88.8% in SD) |
| Dam Length | 380 ft |
| Dam Type | Earth |
| Max Storage | 112 acre-ft |
| Normal Storage | 80 acre-ft |
| Max Discharge | 500 cfs |
| Year Completed | 1959 (67 years old) |
| NID ID | SD01827 |
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
MARLO JOHNSON
Private
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Marlo Johnson?
Marlo Johnson 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 Marlo Johnson?
Marlo Johnson is owned by MARLO JOHNSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Marlo Johnson built?
Marlo Johnson was completed in 1959, making it 67 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 Marlo Johnson?
Marlo Johnson 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 Marlo Johnson?
Marlo Johnson 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.