Lewton Dam Reservoir Report
Last Updated: December 13, 2025
Lewton Dam, located in Harding, South Dakota, is a privately-owned structure that plays a crucial role in managing water resources in the area.
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Summary
Built in 1950, this earth-type dam stands at a height of 12 feet and has a length of 545 feet. It serves the purpose of regulating the flow of Slick Creek, with a maximum discharge capacity of 150,570 cubic feet per second. The dam has a storage capacity of 325 acre-feet, providing essential water supply for the region.
Despite being classified as a low hazard potential structure, Lewton Dam is regulated and inspected by the South Dakota Department of Agriculture and Natural Resources. The dam has not been rated for its condition as of yet, but it has undergone an inspection in 1985. With a normal storage capacity of 56 acre-feet, the dam contributes to flood control and water management efforts in the area. The surrounding community benefits from the reliable water supply and the added security provided by the dam's presence.
Managed by the Natural Resources Conservation Service, Lewton Dam demonstrates a commitment to sustainable water resource management in South Dakota. While its emergency action plan and risk assessment measures are not explicitly outlined in the available data, the dam represents a vital infrastructure for climate and water enthusiasts interested in the intersection of environmental conservation and water resource management. The dam's historical significance and its role in shaping the landscape of Harding County make it a noteworthy site for those passionate about water resource engineering and climate resilience efforts.
Year Completed |
1950 |
Dam Length |
545 |
Dam Height |
12 |
River Or Stream |
SLICK SREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Drainage Area |
39 |
Nid Storage |
325 |
Hazard Potential |
Low |
Nid Height |
12 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Wickham Gulch Campground
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Lantis Spring Campground
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Lantis Spring
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Lewton Dam