Harrison No.1
Key Takeaway
Harrison No.1 is classified as low hazard in South Dakota. It was completed in 1959 and is 67 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 23 ft (taller than 49.8% in SD) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 92 acre-ft |
| Normal Storage | 53 acre-ft |
| Max Discharge | 2,100 cfs |
| Year Completed | 1959 (67 years old) |
| NID ID | SD01374 |
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
WESLY HARRISON
Private
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Significant Hazard 34 ftFrequently Asked Questions
What is the hazard classification of Harrison No.1?
Harrison No.1 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 Harrison No.1?
Harrison No.1 is owned by WESLY HARRISON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Harrison No.1 built?
Harrison No.1 was completed in 1959, making it 67 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 Harrison No.1?
Harrison No.1 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 Harrison No.1?
Harrison No.1 has a dam height of 23 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.