Jarl No.1
Key Takeaway
Jarl No.1 is classified as low hazard in South Dakota. It was completed in 1968 and is 58 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 23 ft (taller than 49.8% in SD) |
| Dam Length | 100 ft |
| Dam Type | Earth |
| Max Storage | 128 acre-ft |
| Normal Storage | 112 acre-ft |
| Max Discharge | 132 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | SD01412 |
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
JARL
Private
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Jarl No.1?
Jarl 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 Jarl No.1?
Jarl No.1 is owned by JARL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jarl No.1 built?
Jarl No.1 was completed in 1968, making it 58 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 Jarl No.1?
Jarl No.1 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Jarl No.1?
Jarl 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.