Harold Arnold
Key Takeaway
Harold Arnold is classified as low hazard in South Dakota. It was completed in 1950 and is 76 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 21 ft (taller than 40.7% in SD) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 210 acre-ft |
| Normal Storage | 86 acre-ft |
| Max Discharge | 4,312 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | SD00746 |
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
HAROLD ARNOLD
Private
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Harold Arnold?
Harold Arnold 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 Harold Arnold?
Harold Arnold is owned by HAROLD ARNOLD (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Harold Arnold built?
Harold Arnold 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 Harold Arnold?
Harold Arnold serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Harold Arnold?
Harold Arnold has a dam height of 21 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.