South Dam Reservoir Report
Nearby: Nolan Dam County Line Dam
Last Updated: December 5, 2025
South Dam, located in Fall River, South Dakota, is a privately owned earth dam constructed in 1942 with a height of 29 feet and a length of 900 feet.
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Summary
The dam serves as a vital structure on the TRIBUTARY CHEYENNE RIVER, providing storage capacity of 464 acre-feet for water resource management in the area. Managed by the Natural Resources Conservation Service, South Dam is regulated, permitted, inspected, and enforced by the state agency DENR, ensuring its safety and compliance with regulations.
With a low hazard potential and a current condition assessment of "Not Rated," South Dam plays a crucial role in flood control and water supply for the region. Although no specific primary purpose is listed, the dam's design and capacity suggest a focus on water resource management and environmental conservation. Despite its age, South Dam continues to contribute to the overall resilience and sustainability of the local water infrastructure, supported by regular inspections and regulatory oversight to maintain its functionality and safety for the surrounding communities.
Year Completed |
1942 |
Dam Length |
900 |
Dam Height |
29 |
River Or Stream |
TRIBUTARY CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
464 |
Hazard Potential |
Low |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cheyenne R Near Buffalo Gap Sd
|
103cfs |
Beaver Cr Near Buffalo Gap Sd
|
11cfs |
Cheyenne River At Redshirt
|
311cfs |
Battle Cr Below Hermosa Sd
|
8cfs |
White R Near Oglala Sd
|
101cfs |
Cheyenne R Below Angostura Dam Sd
|
2cfs |
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.
South Dam