Dykstra Number 4 Reservoir Report
Nearby: Richardson Number 1 Dykstra Number 6
Last Updated: December 8, 2025
Dykstra Number 4 is a privately owned earth dam located in Jones, South Dakota, along the TR-White River.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1954 by the Natural Resources Conservation Service, this dam stands at a height of 28 feet and has a length of 321 feet. With a maximum storage capacity of 25 acre-feet and a normal storage capacity of 15 acre-feet, Dykstra Number 4 plays a crucial role in water resource management in the area.
Despite being classified as having low hazard potential, Dykstra Number 4 is regulated by the South Dakota Department of Environment and Natural Resources, and is subject to regular state permitting, inspection, and enforcement. The dam has not been rated for its condition assessment, and there are currently no emergency action plans in place. With a maximum discharge of 473 cubic feet per second, the dam's structural integrity and maintenance are essential to ensure the safety of downstream communities and the surrounding environment.
As a significant water resource structure in the region, Dykstra Number 4 serves as a vital component of the local hydrological system. Its presence highlights the interconnectedness of water resource management and climate resilience, making it a focal point for water resource and climate enthusiasts interested in understanding and addressing the challenges of sustainable water management in the face of a changing climate.
Year Completed |
1954 |
Dam Length |
321 |
Dam Height |
28 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
25 |
Hazard Potential |
Low |
Nid Height |
28 |
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 4