O'Farrell Dam No. 2
Key Takeaway
O'Farrell Dam No. 2 is classified as low hazard in South Dakota. It was completed in 2006 and is 20 years old. Its primary use is recreation.
Physical Details
| Dam Height | 20 ft (taller than 33.7% in SD) |
| Dam Length | 400 ft |
| Dam Type | Earth |
| Max Storage | 65 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,026 cfs |
| Year Completed | 2006 (20 years old) |
| NID ID | SD02587 |
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
MARIE O'FARRELL
Private
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Low Hazard 40 ftFrequently Asked Questions
What is the hazard classification of O'Farrell Dam No. 2?
O'Farrell Dam No. 2 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 O'Farrell Dam No. 2?
O'Farrell Dam No. 2 is owned by MARIE O'FARRELL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was O'Farrell Dam No. 2 built?
O'Farrell Dam No. 2 was completed in 2006, making it 20 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 O'Farrell Dam No. 2?
O'Farrell Dam No. 2 serves the following purposes: Recreation, Fire Protection, Stock, Or Small Fish Pond, 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 O'Farrell Dam No. 2?
O'Farrell Dam No. 2 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.