Andrew Dam
Key Takeaway
Andrew Dam is classified as low hazard in South Dakota. It was completed in 1937 and is 89 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 20 ft (taller than 33.7% in SD) |
| Dam Length | 370 ft |
| Dam Type | Earth |
| Max Storage | 740 acre-ft |
| Normal Storage | 360 acre-ft |
| Max Discharge | 1,420 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | SD01171 |
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
S&PL
State Government
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Andrew Dam?
Andrew 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 Andrew Dam?
Andrew Dam is owned by S&PL (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Andrew Dam built?
Andrew Dam was completed in 1937, making it 89 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 Andrew Dam?
Andrew 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 Andrew Dam?
Andrew Dam has a dam height of 20 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 Andrew Dam last inspected?
Andrew Dam was last inspected on October 5, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.