Dykstra Number 1 Reservoir Report
Nearby: Dykstra Number 2 Dykstra Number 3
Last Updated: December 8, 2025
Dykstra Number 1 is a privately owned earth dam located in Jones, South Dakota, along the TR-White River.
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Summary
Constructed in 1956 by the Natural Resources Conservation Service, this dam stands at a height of 27 feet and has a length of 564 feet, with a storage capacity of 95 acre-feet. Despite its age, Dykstra Number 1 is classified as having a low hazard potential and has not been rated for its condition, indicating that it is currently in stable condition.
The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes state permitting, inspection, and enforcement. While the dam has not been modified in recent years, it is closely monitored for any potential risks or hazards. With Dusty Johnson (R) representing the area in Congress, the dam plays a crucial role in water resource management and flood control in the region. Enthusiasts of water resources and climate will find Dykstra Number 1 to be an intriguing case study in dam infrastructure and regulatory oversight.
Overall, Dykstra Number 1 serves as a vital piece of infrastructure in South Dakota, providing flood protection, water storage, and environmental benefits to the local community. Its history, design, and regulatory framework offer valuable insights for water resource and climate enthusiasts interested in understanding the role of dams in managing water resources and mitigating climate-related risks. Whether for research, education, or advocacy purposes, Dykstra Number 1 presents a compelling example of the intersection between human engineering and natural resource management.
Year Completed |
1956 |
Dam Length |
564 |
Dam Height |
27 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
95 |
Hazard Potential |
Low |
Nid Height |
27 |
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 1