Keith Hansen Reservoir Report
Nearby: Sorum Dam Raymond Meyer
Last Updated: December 13, 2025
Keith Hansen is a private dam located in Perkins, South Dakota, along the TR MOREAU RIVER.
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Summary
Constructed in 1950, this earth dam stands at a height of 20 feet and has a storage capacity of 96 acre-feet. With a low hazard potential and a condition assessment marked as "Not Rated," Keith Hansen plays a crucial role in water resource management in the region.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Keith Hansen is under state regulation for permitting, inspection, and enforcement. Despite its age, the dam continues to serve its purpose effectively, with a maximum discharge capacity of 200 cubic feet per second and a normal storage capacity of 68 acre-feet. The dam's location within the St. Paul District underscores its importance as a key infrastructure for water resource conservation in the area.
Although the dam's condition assessment is currently "Not Rated," the low hazard potential and state jurisdiction ensure that Keith Hansen remains a reliable structure for water management in South Dakota. With its historical significance dating back to 1950, this private dam stands as a testament to the continuous efforts towards sustainable water resource management and climate resilience in the region.
Year Completed |
1950 |
Dam Length |
500 |
Dam Height |
20 |
River Or Stream |
TR MOREAU RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
96 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Keith Hansen