Tribe No.4
Key Takeaway
Tribe No.4 is classified as low hazard in South Dakota. It was completed in 1961 and is 65 years old. Its primary use is water supply.
Physical Details
| Dam Height | 28 ft (taller than 77.7% in SD) |
| Dam Length | 315 ft |
| Dam Type | Earth |
| Max Storage | 154 acre-ft |
| Normal Storage | 104 acre-ft |
| Max Discharge | 1,470 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | SD00577 |
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
CHEYENNE RIVER SIOUX TRIBE
Federal Government
Nearby Dams
Johnson
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Low Hazard 21 ftSammons
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Low Hazard 27 ftJ. Reich No.1
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Low Hazard 28 ftJ. Reich No.2
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Low Hazard 29 ftO. Jewett
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Low Hazard 19 ftMraz Bros
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Low Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Tribe No.4?
Tribe 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 Tribe No.4?
Tribe No.4 is owned by CHEYENNE RIVER SIOUX TRIBE (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tribe No.4 built?
Tribe No.4 was completed in 1961, making it 65 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 Tribe No.4?
Tribe No.4 serves the following purposes: Water Supply, 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 Tribe No.4?
Tribe No.4 has a dam height of 28 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.