Tribe No.9 Reservoir Report
Nearby: R. Fields No.4 C. Bennett
Last Updated: December 6, 2025
Tribe No.9, located in Ziebach, South Dakota, is a vital water supply dam managed by the Tribal Government.
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Summary
Built in 1959 with a primary purpose of water supply, Tribe No.9 stands at 21 feet high and spans 525 feet in length along the TR CHEYENNE river. The dam has a storage capacity of 132 acre-feet, providing essential water resources for the surrounding area. Despite its age, the dam is rated as having a low hazard potential and has not been inspected for condition assessment.
Operated by the Natural Resources Conservation Service, Tribe No.9 plays a crucial role in managing water resources in the region. The dam has not undergone significant modifications over the years and lacks detailed information on its condition assessment. Despite the lack of recent inspections and assessments, the dam's low hazard potential suggests a stable infrastructure that continues to serve its primary purpose of water supply.
As water resource and climate enthusiasts, it is important to monitor the maintenance and condition of dams like Tribe No.9 to ensure the safe and sustainable management of water resources. With a focus on emergency preparedness and risk assessment, stakeholders can work towards safeguarding this essential infrastructure for the benefit of the community and the environment.
Year Completed |
1959 |
Dam Length |
525 |
Dam Height |
21 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
132 |
Structural Height |
21 |
Hazard Potential |
Low |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Tribe No.9