Geigle Dam Reservoir Report
Nearby: Sd Noname 108 Hoffman Dam
Last Updated: December 6, 2025
Geigle Dam, located in Pennington, South Dakota, is a privately owned structure that was completed in 1965.
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Summary
Managed by the Natural Resources Conservation Service, this earth dam stands at a height of 13 feet and spans a length of 550 feet. With a maximum storage capacity of 63 acre-feet and a normal storage of 36 acre-feet, the dam serves the primary purpose of water resource management on the TR-CHEYENNE river.
Despite being rated as low hazard potential and not having a condition assessment, Geigle Dam is regulated by the state of South Dakota, with inspections and enforcement carried out by the Department of Environment and Natural Resources (DENR). The dam has the capacity to discharge a maximum of 375 cubic feet per second in case of emergencies. While no Emergency Action Plan (EAP) or risk assessment has been documented, the dam's operations are monitored to ensure public safety and environmental protection in the region.
As a key infrastructure in the area, Geigle Dam plays a crucial role in water resource management and flood control. With its strategic location and design, the dam serves as a valuable asset in safeguarding the surrounding communities and ecosystems from potential risks associated with water discharge and flooding events. Enthusiasts interested in water resources and climate change will find Geigle Dam a fascinating structure that highlights the importance of sustainable water management practices in South Dakota.
Year Completed |
1965 |
Dam Length |
550 |
Dam Height |
13 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
63 |
Hazard Potential |
Low |
Nid Height |
13 |
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.
Geigle Dam