Leslie Caldwell Reservoir Report
Last Updated: December 6, 2025
Leslie Caldwell is a privately owned dam located in Stanley, South Dakota, along the Tributary of the Bad River.
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Summary
Constructed in 1959, this earth dam stands at a height of 26 feet and has a length of 380 feet, providing a storage capacity of 20 acre-feet. Managed by the Natural Resources Conservation Service, Leslie Caldwell is regulated by the South Dakota Department of Environment and Natural Resources, ensuring state jurisdiction, permitting, inspection, and enforcement.
With a low hazard potential and a condition assessment of "Not Rated," Leslie Caldwell serves as a crucial water resource infrastructure in the region. Despite not being rated, the dam's emergency action plan status, risk assessment, and management measures remain unspecified. The dam's purpose and design details are not provided in the data, but it is clear that it plays a significant role in water management and flood control, especially during peak discharges of up to 1500 cubic feet per second.
Located within the St. Paul District of the US Army Corps of Engineers jurisdiction, Leslie Caldwell stands as a testament to the collaboration between private ownership and federal oversight in ensuring the safety and efficiency of water resource infrastructure. As a point of interest for water resource and climate enthusiasts, this dam represents a vital component of South Dakota's water management system, contributing to flood control, water storage, and environmental sustainability in the region.
Year Completed |
1959 |
Dam Length |
380 |
Dam Height |
26 |
River Or Stream |
TRIB. BAD 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.
Leslie Caldwell