Dykstra Nulmber 11 Reservoir Report
Nearby: Dykstra Number 12 Hix Number 1
Last Updated: December 8, 2025
Dykstra Nulmber 11 is a privately owned earth dam located in Jones, South Dakota, along the TR-WHITERIVER.
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Summary
Constructed in 1961 by the Natural Resources Conservation Service, this dam stands at a height of 27 feet and has a length of 582 feet, with a storage capacity of 51 acre-feet. Despite its low hazard potential and the fact that it has not been rated for condition assessment, Dykstra Nulmber 11 is subject to state regulation, inspection, and enforcement by the South Dakota Department of Environment and Natural Resources.
The dam, managed by a private entity, serves a primary purpose that is not specified in the data. However, it is clear that the structure plays a crucial role in water resource management within the region. With a maximum discharge capacity of 1012 cubic feet per second, Dykstra Nulmber 11 contributes to flood control and water storage for the surrounding area. Although it has not been extensively modified or assessed for emergency preparedness, it remains an integral part of the local water infrastructure.
The location of Dykstra Nulmber 11, alongside its design and capacity specifications, highlights its significance in water resource management in South Dakota. As climate change continues to impact water availability and extreme weather events, structures like this dam play a vital role in mitigating risks and ensuring sustainable water usage. Enthusiasts interested in water resources and climate change adaptation will find Dykstra Nulmber 11 to be an intriguing case study of how infrastructure is managed and regulated to meet the challenges of a changing climate.
Year Completed |
1961 |
Dam Length |
582 |
Dam Height |
27 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
51 |
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 Nulmber 11