Prokop Dam Reservoir Report
Last Updated: December 6, 2025
Prokop Dam, located in Jackson, South Dakota, is a privately owned earth dam completed in 1975 on the White River-TR.
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Summary
Standing at a height of 16 feet with a length of 765 feet, this dam has a storage capacity of 100 acre-feet and a normal storage level of 48 acre-feet. Despite being classified as having a low hazard potential, the dam's condition assessment is currently not rated.
Owned and regulated by the state with oversight by the South Dakota Department of Environment and Natural Resources (DENR), Prokop Dam plays a crucial role in water resource management in the region. While the dam does not have associated structures or outlet gates, it serves as a key infrastructure for flood control and water supply purposes in the area.
With its strategic location and importance in the local water management system, Prokop Dam stands as a testament to the collaboration between private ownership and state regulation in ensuring the safety and sustainability of water resources in South Dakota. Climate and water resource enthusiasts will find interest in exploring the history and significance of this essential earth dam in the region.
Year Completed |
1975 |
Dam Length |
765 |
Dam Height |
16 |
River Or Stream |
White River-TR |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
100 |
Hazard Potential |
Low |
Nid Height |
16 |
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.
Prokop Dam