Carl Hansen Reservoir Report
Nearby: Grass Creek 727 (Nid) Alkali (Nid)
Last Updated: December 7, 2025
Carl Hansen is a privately owned dam located in Stanley, South Dakota, with a low hazard potential and a height of 24 feet.
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Summary
Built in 1959, this earth dam serves as a vital water resource, with a storage capacity of 74 acre-feet and a maximum discharge of 840 cubic feet per second. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, permitting, and enforcement to ensure its structural integrity and safety.
Managed by the Natural Resources Conservation Service, Carl Hansen plays a crucial role in controlling the flow of water in the tributary to Antelope Creek. While the dam's condition is currently rated as "Not Rated," it remains an essential infrastructure for water management in the region. With a history dating back over six decades, Carl Hansen stands as a testament to the importance of sustainable water resource management and climate resilience in South Dakota.
As water resource and climate enthusiasts, the data on Carl Hansen provides valuable insights into the infrastructure that supports the sustainable management of water in the region. With its low hazard potential and state-regulated status, Carl Hansen exemplifies the importance of proactive maintenance and regulation to ensure the safety and functionality of dams. As we continue to face challenges posed by climate change, understanding and monitoring key water resource infrastructure like Carl Hansen is essential for promoting resilience and adaptation in the face of evolving environmental conditions.
Year Completed |
1959 |
Dam Length |
600 |
Dam Height |
24 |
River Or Stream |
TYIBUTARY TO ANTELOPE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
24 |
Nid Storage |
74 |
Hazard Potential |
Low |
Nid Height |
24 |
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.
Carl Hansen