Pearl Ross
Key Takeaway
Pearl Ross is classified as low hazard in South Dakota. It was completed in 1956 and is 70 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 20 ft (taller than 33.7% in SD) |
| Dam Length | 500 ft |
| Dam Type | Earth |
| Max Storage | 72 acre-ft |
| Normal Storage | 50 acre-ft |
| Max Discharge | 150 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | SD01770 |
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
JOHNSON BROS.
Private
Nearby Dams
Johnson Bros.
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Low Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Pearl Ross?
Pearl Ross 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 Pearl Ross?
Pearl Ross is owned by JOHNSON BROS. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pearl Ross built?
Pearl Ross was completed in 1956, making it 70 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 Pearl Ross?
Pearl Ross 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 Pearl Ross?
Pearl Ross 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.