Dykstra Number 7 Reservoir Report

Last Updated: December 8, 2025

Dykstra Number 7, located in Jones, South Dakota, is a private earth dam completed in 1953 with a height of 30 feet and a length of 567 feet.


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Summary

This dam on the TR-WHITE RIVER is regulated by the South Dakota Department of Environment and Natural Resources and is inspected, permitted, and enforced by state authorities. With a low hazard potential and a storage capacity of 42 acre-feet, Dykstra Number 7 plays a crucial role in managing water resources in the area.

Managed by the Natural Resources Conservation Service, Dykstra Number 7 is not currently rated for its condition assessment, with no recent inspections or evaluations reported. Despite its low hazard potential, the dam's emergency action plan and risk management measures are not clearly defined or up to date. With a maximum discharge of 562 cubic feet per second, it is essential for stakeholders and authorities to prioritize safety protocols and regular maintenance to ensure the structural integrity and functionality of Dykstra Number 7 for water resource management and climate resilience in the region.

As enthusiasts of water resources and climate resilience, it is crucial to monitor and advocate for the proper maintenance and evaluation of dams like Dykstra Number 7. By staying informed about its condition assessment, emergency response plan, and risk management measures, stakeholders can work towards enhancing the safety and efficiency of this vital infrastructure for water storage and flood control. Engaging with state regulators and agencies responsible for its oversight can help ensure the continued effectiveness and sustainability of Dykstra Number 7 in safeguarding the local community and environment.

Year Completed

1953

Dam Length

567

Dam Height

30

River Or Stream

TR-WHITE RIVER

Primary Dam Type

Earth

Hydraulic Height

30

Nid Storage

42

Hazard Potential

Low

Nid Height

30
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.