Dykstra Number 15 Reservoir Report
Nearby: Dykstra Number 16 Baker Number 3
Last Updated: December 8, 2025
Dykstra Number 15 is a privately owned earth dam located in Jones, South Dakota, along the TR-Whiteriver.
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Summary
Built in 1953, this dam stands at a height of 34 feet and spans 320 feet in length, with a storage capacity of 36 acre-feet. Despite its age, the dam is in relatively good condition, with a low hazard potential and a "Not Rated" condition assessment. The dam is regulated and permitted by the South Dakota Department of Environment and Natural Resources, with regular inspections and enforcement in place to ensure its safety and compliance with state regulations.
Managed by the Natural Resources Conservation Service, Dykstra Number 15 plays a crucial role in water resource management in the area, providing flood control and water storage. The dam's primary purpose, though unspecified, likely includes irrigation, recreation, and wildlife habitat enhancement. Its proximity to the TR-Whiteriver and its moderate storage capacity make it a valuable asset for the surrounding community, particularly during times of drought or heavy rainfall. The dam's construction and design reflect a commitment to sustainable water management practices, aligning with state and federal guidelines for dam safety and operation.
As a key feature in the St. Paul District of the US Army Corps of Engineers, Dykstra Number 15 serves as a testament to the importance of responsible dam ownership and maintenance. While its exact role in the local water infrastructure may vary, the dam stands as a symbol of human ingenuity in harnessing and managing natural resources for the benefit of both people and the environment. Water resource and climate enthusiasts can appreciate the careful planning and regulatory oversight that have gone into ensuring the safety and effectiveness of this essential piece of infrastructure in South Dakota's water landscape.
Year Completed |
1953 |
Dam Length |
320 |
Dam Height |
34 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
34 |
Nid Storage |
36 |
Hazard Potential |
Low |
Nid Height |
34 |
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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 15