Tribe No.11 Reservoir Report
Nearby: Matter K. Dorsey No.1
Last Updated: December 7, 2025
Tribe No.11 is a dam located in Ziebach, South Dakota, with a primary purpose of water supply.
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Summary
Built in 1960, this earth dam stands at a height of 28 feet and has a length of 500 feet. With a storage capacity of 170 acre-feet, it serves as a vital resource for the surrounding area, particularly in providing water for various needs. Although it has a low hazard potential, its condition assessment is currently not rated.
Managed by the Natural Resources Conservation Service, Tribe No.11 plays a crucial role in ensuring water availability in the region. Situated on the TR MOREAU river, it is a key component of the local water infrastructure. Despite its importance, the dam has not been subjected to recent inspections, and its emergency action plan and risk assessment measures are yet to be fully developed. However, with its historical significance and utility in water supply, the dam remains a significant asset for the community.
As water resource and climate enthusiasts continue to monitor and assess the impact of dams like Tribe No.11, it is essential to prioritize maintenance and risk management measures to ensure the safety and reliability of water supply systems. With its strategic location and role in water management, Tribe No.11 stands as a testament to the importance of sustainable water resource development and conservation efforts in South Dakota.
Year Completed |
1960 |
Dam Length |
500 |
Dam Height |
28 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
170 |
Structural Height |
28 |
Hazard Potential |
Low |
Nid Height |
28 |
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.11