Milesville Dam ??? Reservoir Report
Nearby: Staben Dam Ferguson Dam
Last Updated: December 6, 2025
Milesville Dam, located on the Cheyenne River in South Dakota, was completed in 1938 and stands at a height of 15 feet with a length of 600 feet.
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Summary
The dam has a storage capacity of 280 acre-feet, with a normal storage level of 110 acre-feet. While the dam is classified as low hazard potential, its condition assessment is currently listed as "Not Rated."
Managed by the South Dakota Department of Environment and Natural Resources, Milesville Dam is regulated and inspected by the state agency to ensure its safety and compliance with regulations. The dam serves as a vital resource for water storage and management in the region, with a maximum discharge capacity of 1250 cubic feet per second. Despite its age, the dam continues to play a crucial role in supporting the local ecosystem and water supply needs.
As an earth-type dam, Milesville Dam is integral to the infrastructure of the area and contributes to flood control and water resource management efforts. With its historical significance and ongoing maintenance by state regulators, the dam remains a key structure in safeguarding the surrounding communities and environment from potential risks associated with water management and climate fluctuations.
Year Completed |
1938 |
Dam Length |
600 |
Dam Height |
15 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
280 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
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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.
Milesville Dam ???