Sandy Number 2 Reservoir Report
Nearby: Peters #1 Sandy Number 1
Last Updated: December 7, 2025
Sandy Number 2 is a privately owned dam located in Jones, South Dakota, along the TR-White River.
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Summary
Built in 1956, this earth dam stands at a height of 26 feet and has a length of 420 feet. With a storage capacity of 56 acre-feet, it primarily serves for flood control purposes with a low hazard potential. The dam is regulated and inspected by the South Dakota Department of Environment and Natural Resources, ensuring its safety and compliance with state regulations.
Despite its age, Sandy Number 2 has not been rated for its condition, and there is no information available on its inspection frequency or emergency action plan preparedness. The dam's maximum discharge capacity is 1008 cubic feet per second, indicating its ability to handle significant water flow during peak times. The dam is situated within the St. Paul District of the US Army Corps of Engineers jurisdiction, but it is not owned or funded by any federal agency.
With its strategic location along the TR-White River, Sandy Number 2 plays a crucial role in managing water resources and mitigating flood risks in the area. As a privately owned structure, it is essential for the owners to ensure regular maintenance and adherence to state regulations to uphold its integrity and safety standards. Further assessment and evaluation of the dam's condition, as well as the development of an emergency action plan, could enhance its resilience and preparedness for any potential risks or emergencies in the future.
Year Completed |
1956 |
Dam Length |
420 |
Dam Height |
26 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
56 |
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.
Sandy Number 2