Nelson Dam
Key Takeaway
Nelson Dam is classified as low hazard in South Dakota. It was completed in 1980 and is 46 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 40 ft (taller than 96.5% in SD) |
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 100 acre-ft |
| Max Discharge | 1,560 cfs |
| Year Completed | 1980 (46 years old) |
| NID ID | SD02540 |
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
GARY & ARLO NELSON
Private
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Nelson Dam?
Nelson 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 Nelson Dam?
Nelson Dam is owned by GARY & ARLO NELSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Nelson Dam built?
Nelson Dam was completed in 1980, making it 46 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 Nelson Dam?
Nelson Dam serves the following purposes: Irrigation, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Nelson Dam?
Nelson 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.