Hanson Dam No. 2 Reservoir Report
Nearby: Hanson Dam Sd Noname 202
Last Updated: December 5, 2025
Hanson Dam No.
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Summary
2, located in South Dakota, is a privately owned earth dam designed by NRCS and completed in 2016. With a height of 21 feet and a storage capacity of 99 acre-feet, this dam plays a crucial role in water resource management in the area. Situated on the Upper Deep Creek-TR, the dam serves to regulate water flow and provide flood control for the surrounding Haakon County.
Despite its low hazard potential and moderate risk assessment, Hanson Dam No. 2 remains in good condition, with inspections, permitting, and enforcement conducted by the state regulatory agency DENR. The dam features an uncontrolled spillway and is not equipped with outlet gates. While the primary purpose of the dam is not specified, its presence contributes to the overall water infrastructure in the region. For water resource and climate enthusiasts, the technical details and operational aspects of Hanson Dam No. 2 offer insight into the complexities of managing water resources in a changing climate.
Year Completed |
2016 |
Dam Length |
479 |
Dam Height |
21 |
River Or Stream |
Upper Deep Creek-TR |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
99 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
21 |
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.
Hanson Dam No. 2