Rankin Number 1 Reservoir Report
Nearby: Baker Number 2 Brost Number 6
Last Updated: December 8, 2025
Rankin Number 1 is a privately-owned dam located in Jones, South Dakota, along the TR-White River.
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Summary
Built in 1963, this earth dam stands at 26 feet tall and stretches 360 feet in length, with a storage capacity of 20 acre-feet. Managed by the Natural Resources Conservation Service, the dam is state-regulated and undergoes regular inspections, enforcement, and permitting to ensure its safety and compliance with regulations.
Despite its low hazard potential, Rankin Number 1 has not been rated for its condition assessment. With a maximum discharge capacity of 487 cubic feet per second, this dam plays a crucial role in managing water resources and mitigating potential flood risks in the area. With its location in a rural setting and lack of associated structures, Rankin Number 1 provides a fascinating case study for water resource and climate enthusiasts interested in the intersection of infrastructure, regulation, and environmental stewardship.
Overall, Rankin Number 1 exemplifies the importance of effective dam management and regulation in safeguarding communities and ecosystems. As an essential structure in the St. Paul District, this dam serves as a key component in the broader water management system of South Dakota. Its history, design, and operational characteristics offer valuable insights for those interested in the sustainable utilization of water resources amidst changing climate conditions.
Year Completed |
1963 |
Dam Length |
360 |
Dam Height |
26 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
20 |
Hazard Potential |
Low |
Nid Height |
26 |
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.
Rankin Number 1