Seiler Dam Reservoir Report

Last Updated: December 13, 2025

Seiler Dam, located in Corson, South Dakota, is a privately owned earth dam that was completed in 1980.


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Summary

The dam stands at a height of 20 feet and stretches 411 feet in length, with a storage capacity of 91 acre-feet. It is situated along a tributary of the Grand River and is regulated by the South Dakota Department of Environment and Natural Resources.

With a low hazard potential and a condition assessment that is currently not rated, Seiler Dam plays a crucial role in water resource management in the region. The dam has the capacity to handle a maximum discharge of 1928 cubic feet per second and serves the primary purpose of water retention and flood control. Despite its age, the dam remains structurally sound and is regularly inspected, demonstrating its importance in ensuring the safety and security of the surrounding area.

Managed by the Natural Resources Conservation Service, Seiler Dam serves as a vital infrastructure for the community, offering both environmental and agricultural benefits. Its presence contributes to the overall resilience of the watershed and highlights the importance of sustainable water resource management in the face of changing climate conditions. As a key component of the local infrastructure, Seiler Dam stands as a testament to the importance of proactive dam maintenance and regulation in safeguarding water resources for future generations.

Year Completed

1980

Dam Length

411

Dam Height

20

River Or Stream

TRIB. GRAND RIVER

Primary Dam Type

Earth

Hydraulic Height

20

Drainage Area

3

Nid Storage

91

Hazard Potential

Low

Nid Height

20
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.