I. Thompson Reservoir Report
Nearby: R. Howie Timmons Wetland Dam
Last Updated: December 6, 2025
Located in Meade, South Dakota, the I.
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Summary
Thompson dam stands as a testament to water resource management in the region. Completed in 1946, this earth-filled dam boasts a height of 16 feet and a length of 900 feet, providing a storage capacity of 330 acre-feet. Serving as a vital structure on the TR Cheyenne river, the dam is regulated by the South Dakota Department of Environment and Natural Resources.
With a low hazard potential and a condition assessment that is currently not rated, the I. Thompson dam plays a crucial role in flood control and water supply management in the area. Despite not being operated by the US Army Corps of Engineers, the dam is subject to state regulation and inspection, ensuring its continued safety and functionality. As climate change continues to impact water resources, structures like the I. Thompson dam will be essential in mitigating the effects of extreme weather events.
For water resource and climate enthusiasts, the I. Thompson dam is a fascinating example of infrastructure designed to meet the challenges of a changing climate. Its strategic location, design features, and regulatory oversight make it a key player in water management efforts in South Dakota. As discussions around water security and resilience heat up, the I. Thompson dam stands as a symbol of the importance of proactive planning and investment in sustainable water infrastructure.
Year Completed |
1946 |
Dam Length |
900 |
Dam Height |
16 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
330 |
Hazard Potential |
Low |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cheyenne R Near Plainview Sd
|
0cfs |
Belle Fourche River Near Elm Springs
|
17900cfs |
Elk Cr Near Elm Springs Sd
|
0cfs |
Moreau R Near Faith Sd
|
14cfs |
Cheyenne River Near Wasta
|
190cfs |
Belle Fourche R Near Sturgis Sd
|
34cfs |
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.
I. Thompson