Wilson No 1 Reservoir Report
Nearby: Wilson No.2 Sd Noname 130
Last Updated: December 6, 2025
Wilson No 1 is a privately owned earth dam located in Harding, South Dakota, that serves multiple purposes including fire protection, stock, and a small fish pond.
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Summary
Constructed in 1952 by the Natural Resources Conservation Service, this dam stands at a height of 23 feet and has a length of 400 feet, with a storage capacity of 322 acre-feet. The dam is situated on Tr-Spring Creek and has a low hazard potential, with a moderate risk assessment rating.
Despite its age, Wilson No 1 has not undergone any modifications and its condition assessment is currently not available. With a spillway width of 80 feet and a maximum discharge capacity of 2040 cubic feet per second, the dam is designed to handle various water management needs efficiently. While the emergency action plan and risk management measures for this dam are not specified, its strategic location and purposeful design make it a vital asset for water resource management in the region. For water resource and climate enthusiasts, Wilson No 1 serves as a prime example of sustainable infrastructure that contributes to both environmental conservation and community safety.
Year Completed |
1952 |
Dam Length |
400 |
Dam Height |
23 |
River Or Stream |
Tr-Spring Creek |
Primary Dam Type |
Earth |
Drainage Area |
3.13 |
Nid Storage |
322 |
Hazard Potential |
Low |
Nid Height |
23 |
Seasonal Comparison
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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.
Wilson No 1