Oja No.2
Key Takeaway
Oja No.2 is classified as low hazard in South Dakota. It was completed in 1949 and is 77 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 13 ft (taller than 5.1% in SD) |
| Dam Length | 560 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 57 acre-ft |
| Max Discharge | 750 cfs |
| Year Completed | 1949 (77 years old) |
| NID ID | SD01950 |
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
DEAN OJA
Private
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Low Hazard 23 ftFrequently Asked Questions
What is the hazard classification of Oja No.2?
Oja 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 Oja No.2?
Oja No.2 is owned by DEAN OJA (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Oja No.2 built?
Oja No.2 was completed in 1949, making it 77 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 Oja No.2?
Oja No.2 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 Oja No.2?
Oja No.2 has a dam height of 13 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.