R. Bierman No.2 Reservoir Report
Nearby: O. Drageset No.1 O. Drageset No.2
Last Updated: December 9, 2025
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Summary
Bierman No.2 is a privately owned earth dam located in Ziebach, South Dakota, along the TR MOREAU river. Completed in 1958, this dam stands at a height of 22 feet and has a storage capacity of 286 acre-feet, with a normal storage capacity of 189 acre-feet. The dam spans a length of 730 feet and has a maximum discharge capacity of 1470 cubic feet per second.
Managed by the Natural Resources Conservation Service, R. Bierman No.2 is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, with a low hazard potential and a current condition assessment of "Not Rated." While the dam has not been rated for emergency preparedness or risk management measures, it is equipped with state-permitted and inspected outlets and is situated under the supervision of the St. Paul District of the US Army Corps of Engineers. The dam plays a vital role in water resource management in the region, providing essential flood control and water storage benefits.
With its strategic location and crucial role in water resource management, R. Bierman No.2 serves as a significant infrastructure asset in South Dakota. As climate change impacts water resources and hydrological patterns, the proper maintenance and regulation of this dam will be essential to ensure the safety and efficiency of its operations. Water resource and climate enthusiasts can appreciate the importance of this structure in mitigating flood risks and supporting sustainable water management practices in the region.
Year Completed |
1958 |
Dam Length |
730 |
Dam Height |
22 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
286 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
R. Bierman No.2