John Carr Jr. No. 4
Key Takeaway
John Carr Jr. No. 4 is classified as low hazard in South Dakota. It was completed in 1972 and is 54 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 25 ft (taller than 57.4% in SD) |
| Dam Length | 400 ft |
| Dam Type | Earth |
| Max Storage | 30 acre-ft |
| Normal Storage | 21 acre-ft |
| Max Discharge | 875 cfs |
| Year Completed | 1972 (54 years old) |
| NID ID | SD01230 |
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
JOHN CARR JR.
Private
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What is the hazard classification of John Carr Jr. No. 4?
John Carr Jr. No. 4 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 John Carr Jr. No. 4?
John Carr Jr. No. 4 is owned by JOHN CARR JR. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was John Carr Jr. No. 4 built?
John Carr Jr. No. 4 was completed in 1972, making it 54 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 John Carr Jr. No. 4?
John Carr Jr. No. 4 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 John Carr Jr. No. 4?
John Carr Jr. No. 4 has a dam height of 25 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.