Andrew Dam Reservoir Report
Nearby: Singletary Dam Sd Noname 144
Last Updated: December 6, 2025
Andrew Dam, located in South Dakota along the TR Bad River, is a vital earth dam completed in 1937 with a height of 20 feet and a length of 370 feet.
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Summary
Owned and regulated by the state, it boasts a storage capacity of 740 acre-feet and a maximum discharge of 1420 cubic feet per second. Despite its low hazard potential, the dam is subject to regular state inspection, permitting, and enforcement to ensure its structural integrity and safety.
Managed by the St. Paul District of the US Army Corps of Engineers, Andrew Dam plays a crucial role in water resource management and flood control in the region. With a normal storage capacity of 360 acre-feet, the dam serves as a key component in the overall water infrastructure of Jackson County, South Dakota. Although its condition is currently not rated, the dam's emergency action plan and risk management measures are under continuous evaluation and improvement to mitigate any potential threats and protect downstream communities.
As a significant structure in the area, Andrew Dam is closely monitored by state and federal agencies to uphold its operational efficiency and safety standards. With State Representative Dusty Johnson overseeing the district, the dam's importance in regulating water flow, maintaining reservoir levels, and preventing flooding cannot be overstated. As climate change impacts water resources, the proper management and maintenance of Andrew Dam are essential to ensure sustainable water supply and environmental protection for future generations.
Year Completed |
1937 |
Dam Length |
370 |
Dam Height |
20 |
River Or Stream |
TR BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
740 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Andrew Dam