Lewton Dam
Key Takeaway
Lewton Dam is classified as low hazard in South Dakota. It was completed in 1950 and is 76 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 12 ft (taller than 3% in SD) |
| Dam Length | 545 ft |
| Dam Type | Earth |
| Max Storage | 325 acre-ft |
| Normal Storage | 56 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 39 sq mi |
| Max Discharge | 150,570 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | SD02154 |
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
ROBERT LEWTON
Private
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Lewton Dam?
Lewton 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 Lewton Dam?
Lewton Dam is owned by ROBERT LEWTON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lewton Dam built?
Lewton Dam was completed in 1950, making it 76 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 Lewton Dam?
Lewton 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 Lewton Dam?
Lewton Dam has a dam height of 12 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.
When was Lewton Dam last inspected?
Lewton Dam was last inspected on November 5, 1985. Inspection dates indicate when a formal review occurred, not the results of that inspection.