R. Wolff Reservoir Report
Nearby: Richard Wolff Hauge Dam
Last Updated: December 6, 2025
Located in Perkins, South Dakota, the R.
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Summary
Wolff dam stands as a testament to water resource management and climate resilience. Constructed in 1950 by the Natural Resources Conservation Service, this private earth dam serves a critical state-regulated function in regulating the flow of the TR-GRAND river. With a modest height of 19 feet and a storage capacity of 80 acre-feet, R. Wolff plays a vital role in flood control and water supply for the surrounding area.
Despite its low hazard potential and current "Not Rated" condition assessment, the R. Wolff dam remains an essential piece of infrastructure in South Dakota. Managed by private owners and regulated by the state's Department of Environment and Natural Resources, this dam undergoes regular inspections, permitting, and enforcement to ensure its continued safety and functionality. With Dusty Johnson (R) representing the district in Congress, the dam is part of a larger network of water infrastructure that contributes to the region's resilience in the face of changing climate patterns.
As water resource and climate enthusiasts, we can appreciate the significance of structures like R. Wolff in safeguarding our communities and ecosystems. With its historical significance, functional design, and regulatory oversight, this earth dam serves as a reminder of the importance of sustainable water management practices in a world where the impacts of climate change are becoming increasingly apparent. As we strive to protect and preserve our precious water resources, the R. Wolff dam stands as a symbol of our commitment to building a more resilient and sustainable future for generations to come.
Year Completed |
1950 |
Dam Length |
300 |
Dam Height |
19 |
River Or Stream |
TR-GRAND |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
80 |
Hazard Potential |
Low |
Nid Height |
19 |
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. Wolff