Floyd Cooper Reservoir Report
Nearby: John Catron No.2 John Catron No.1
Last Updated: December 6, 2025
Floyd Cooper is a privately owned dam located in Harding, South Dakota, with a low hazard potential and a height of 17 feet.
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Summary
Built in 1954, this earth dam has a storage capacity of 110 acre-feet and plays a crucial role in water resource management in the region. The dam is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement mechanisms in place to ensure its safety and compliance with regulations.
Managed by the Natural Resources Conservation Service, Floyd Cooper serves as a vital structure for flood control and water supply, with a maximum discharge capacity of 8,400 cubic feet per second. Although its condition assessment is currently marked as "Not Rated," the dam's emergency action plan status and risk assessment measures are not fully specified in the available data. With its strategic location on TR LITTLE MISSION RIVER and contribution to the overall water infrastructure of South Dakota, Floyd Cooper stands as a significant asset for water resource and climate enthusiasts to monitor and study for sustainable management practices.
Year Completed |
1954 |
Dam Length |
1840 |
Dam Height |
17 |
River Or Stream |
TR LITTLE MISSONot RatedI RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
110 |
Hazard Potential |
Low |
Nid Height |
17 |
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.
Floyd Cooper