C Mccormick Dam Reservoir Report
Nearby: C Klein Dam Copeland Dam
Last Updated: December 13, 2025
C McCormick Dam in South Dakota, situated on the TR-KEYAPAHA RIVER, stands as a testament to engineering prowess since its completion in 1946.
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Summary
This privately-owned Earth dam boasts a height of 16 feet and a length of 430 feet, providing crucial storage of 89 acre-feet of water for various purposes. With a maximum discharge capacity of 200 cubic feet per second, the dam plays a significant role in managing water resources in Todd County, South Dakota.
Despite its age, C McCormick Dam maintains a low hazard potential and has not yet been rated for its condition. However, state regulatory agencies like the DENR oversee its permitting, inspection, and enforcement to ensure its safe operation. With Dusty Johnson representing the area in Congress, the dam remains under state jurisdiction and is subject to regular oversight to address any potential risks or issues that may arise.
Water resource and climate enthusiasts will appreciate the historical significance and functional importance of C McCormick Dam. As a vital infrastructure component in the region's water management system, this dam serves as a reminder of the delicate balance between harnessing water resources for human benefit while ensuring environmental sustainability. With its capacity for storage and controlled release of water, the dam plays a crucial role in safeguarding communities against floods and supporting agricultural activities in the area.
Year Completed |
1946 |
Dam Length |
430 |
Dam Height |
16 |
River Or Stream |
TR-KEYAPAHA RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
89 |
Hazard Potential |
Low |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Keya Paha R Near Keyapaha Sd
|
33cfs |
Niobrara River Near Sparks
|
969cfs |
Keya Paha R At Wewela Sd
|
54cfs |
Little White R Near Rosebud Sd
|
96cfs |
Little White R Below White River Sd
|
141cfs |
White River Near White River
|
42cfs |
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.
C Mccormick Dam