R. Keckley No.1 Reservoir Report
Nearby: R. Keckley No.2 John Holloway
Last Updated: December 8, 2025
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Summary
Keckley No.1 is a privately owned earth dam located in Ziebach, South Dakota, along the TR CHEYENNE river. Completed in 1967, this dam stands at a height of 24 feet and has a length of 625 feet, providing a storage capacity of 152 acre-feet. Despite being classified as low hazard potential and not rated for condition assessment, the dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR), with state permitting, inspection, and enforcement in place.
Situated within the St. Paul District of the US Army Corps of Engineers, R. Keckley No.1 plays a crucial role in water resource management in the region, with a maximum discharge capacity of 2745 cubic feet per second. While no specific primary purpose is identified for the dam, its presence contributes to flood control, irrigation, and water supply activities in the area. The dam has not undergone any significant modifications in recent years and lacks detailed emergency response plans, risk assessments, and inundation maps, highlighting potential areas for improvement in safety and disaster preparedness.
Given its location and function, R. Keckley No.1 serves as a key infrastructure element in the water resource system of South Dakota. With ongoing state regulation and maintenance, the dam continues to support the surrounding community in managing water levels, ensuring water supply reliability, and mitigating flood risks along the TR CHEYENNE river. As water resource and climate enthusiasts, understanding the significance of structures like R. Keckley No.1 is vital for appreciating the complexities of water management and the challenges posed by changing environmental conditions.
Year Completed |
1967 |
Dam Length |
625 |
Dam Height |
24 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
24 |
Nid Storage |
152 |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Cheyenne R Near Plainview Sd
|
0cfs |
Moreau R Near Faith Sd
|
14cfs |
Grand R At Little Eagle Sd
|
47cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
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.
R. Keckley No.1