Tribe No.2
Key Takeaway
Tribe No.2 is classified as low hazard in South Dakota. It was completed in 1956 and is 70 years old. Its primary use is water supply.
Physical Details
| Dam Height | 23 ft (taller than 49.8% in SD) |
| Dam Length | 570 ft |
| Dam Type | Earth |
| Max Storage | 173 acre-ft |
| Normal Storage | 106 acre-ft |
| Max Discharge | 3,000 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | SD00517 |
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
B. Butler No.1
Ziebach, SD
Low Hazard 20 ftRoy Veit No.4
Ziebach, SD
Low Hazard 25 ftB. Butler No.2
Ziebach, SD
Low Hazard 14 ftViet No.2
Ziebach, SD
Low Hazard 29 ftB. Butler No.3
Ziebach, SD
Low Hazard 16 ftBednar Dam
Ziebach, SD
High Hazard 19 ftC. Mraz
Ziebach, SD
Low Hazard 13 ftSargent Dam
Ziebach, SD
Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Tribe No.2?
Tribe No.2 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.2?
Tribe No.2 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.2 built?
Tribe No.2 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 Tribe No.2?
Tribe No.2 serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Tribe No.2?
Tribe No.2 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.