Dykstra Number 12 Reservoir Report
Nearby: Hix Number 1 Dykstra Nulmber 11
Last Updated: December 14, 2025
Dykstra Number 12, located in South Dakota's Jones County, is a privately-owned earth dam completed in 1953 with a height of 34 feet and a length of 450 feet.
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Summary
The dam has a storage capacity of 74 acre-feet and a maximum discharge of 1687 cubic feet per second. Despite being regulated by the state and having undergone state inspection and enforcement, its hazard potential is considered low and its condition is currently not rated.
Managed by the Natural Resources Conservation Service, Dykstra Number 12 plays a crucial role in the conservation and regulation of the Whiteriver watershed. With a primary purpose not specified, the dam serves as a key structure in the region for water resource management. Although lacking recent inspection data, the dam's low hazard potential suggests a stable and well-maintained infrastructure that contributes to the overall resilience of the local water resource system.
This earth dam, situated in a picturesque location near the Whiteriver, stands as a testament to the importance of effective water management practices in mitigating the impacts of climate change. As climate enthusiasts and water resource advocates, understanding the significance of structures like Dykstra Number 12 in sustaining ecosystems and communities underscores the need for continued monitoring and investment in water infrastructure to adapt to a changing climate and ensure water security for future generations.
Year Completed |
1953 |
Dam Length |
450 |
Dam Height |
34 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
34 |
Nid Storage |
74 |
Hazard Potential |
Low |
Nid Height |
34 |
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.
Dykstra Number 12