Dykstra Number 10 Reservoir Report
Nearby: Brost Number 3 Dykstra Number 9
Last Updated: December 8, 2025
Dykstra Number 10 is a privately owned earth dam located in Jones, South Dakota, along the TR-White River.
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Summary
The dam stands at a height of 25 feet and was completed in 1959, with a storage capacity of 64 acre-feet. Managed by the Natural Resources Conservation Service, Dykstra Number 10 is regulated by the state agency DENR and undergoes regular inspections, permitting, and enforcement to ensure its safety and compliance with state regulations.
Despite its low hazard potential and current "Not Rated" condition assessment, Dykstra Number 10 plays a crucial role in water resource management in the region. With a maximum discharge capacity of 2125 cubic feet per second, the dam helps control water flow and mitigate flood risks along the TR-White River. While the dam does not have an Emergency Action Plan (EAP) in place and lacks updated inundation maps, its strategic location and design contribute to the overall resilience of the local water infrastructure.
As a key component of the St. Paul District US Army Corps of Engineers, Dykstra Number 10 embodies the intersection of public and private efforts in water resource management. With its historical significance dating back to the late 1950s, the dam continues to serve as a vital structure for water storage and flood control in South Dakota. As climate change impacts water resources, ongoing monitoring and maintenance of Dykstra Number 10 will be essential to ensure its continued effectiveness and safety in the face of evolving environmental challenges.
Year Completed |
1959 |
Dam Length |
393 |
Dam Height |
25 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
64 |
Hazard Potential |
Low |
Nid Height |
25 |
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 10