Nelder Ebert No.3 Reservoir Report
Nearby: Richard Waddell Nelder Ebert No.1
Last Updated: December 6, 2025
Nelder Ebert No.3, located in Corson, South Dakota, is a privately owned earth dam completed in 1960 by the Natural Resources Conservation Service.
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Summary
Standing at 14 feet tall with a length of 988 feet, this dam has a storage capacity of 71 acre-feet and a maximum discharge rate of 3,224 cubic feet per second. Despite its low hazard potential, the dam is regulated by the South Dakota Department of Environment and Natural Resources, with state-permitting, inspection, and enforcement in place to ensure its safety and compliance.
The dam on TR-GRAND river is under the jurisdiction of the St. Paul District and falls within the congressional district represented by Dusty Johnson (R). While the dam's condition assessment is currently not rated, it is reassuring to know that emergency action plans are in place, and the risk management measures are being actively monitored. With a primary purpose that is not specified, the Nelder Ebert No.3 serves as a crucial water resource infrastructure in South Dakota, contributing to flood control and water management in the region.
As water resource and climate enthusiasts, it is important to recognize the significance of structures like Nelder Ebert No.3 in safeguarding our communities and ecosystems. By staying informed about the regulatory oversight, maintenance efforts, and emergency preparedness associated with dams like this, we can support sustainable water management practices and contribute to the resilience of our water resources in the face of changing climate conditions.
Year Completed |
1960 |
Dam Length |
988 |
Dam Height |
14 |
River Or Stream |
TR-GRAND |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
71 |
Hazard Potential |
Low |
Nid Height |
14 |
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.
Nelder Ebert No.3