Fishko Dam Reservoir Report
Nearby: Long Hollow Dam Fishko Dam #3
Last Updated: December 6, 2025
Fishko Dam, located in Fall River, South Dakota, is a privately owned structure that plays a vital role in water resource management and climate resilience in the region.
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Summary
Completed in 1957, this earth dam stands at a height of 16 feet and spans 740 feet across the TR-CHEYENNE river or stream. Managed by the Natural Resources Conservation Service, the dam has a storage capacity of 128 acre-feet, with a normal storage level of 104 acre-feet.
Despite its low hazard potential and ungraded condition assessment, Fishko Dam is a crucial piece of infrastructure for the surrounding community. With the ability to regulate the flow of water and store significant volumes, the dam helps mitigate flood risks and ensures a stable water supply for agricultural and municipal use. Although its specific purposes and primary source agency are not specified, the dam's presence is a testament to the importance of sustainable water management practices in South Dakota.
As a state-regulated structure under the jurisdiction of DENR, Fishko Dam undergoes regular inspections, permitting, and enforcement to ensure its safety and compliance with relevant regulations. Its location within the Omaha District and close proximity to Dusty Johnson's congressional district further emphasize the importance of responsible dam operation and maintenance in safeguarding water resources and adapting to changing climate conditions. For water resource and climate enthusiasts, Fishko Dam serves as a tangible example of the intricate interplay between infrastructure, regulation, and environmental stewardship in sustaining water security for future generations.
Year Completed |
1957 |
Dam Length |
740 |
Dam Height |
16 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
128 |
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.
Fishko Dam