Carr #6 Reservoir Report

Last Updated: December 8, 2025

Carr #6 is a private dam located in Mellette, South Dakota, along the tributary of Pine Creek.


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Summary

Constructed in 1957, this earth dam stands at a height of 26 feet and has a length of 540 feet, providing a storage capacity of 38 acre-feet. While the dam is state-regulated and regularly inspected, its hazard potential is classified as low, and its condition assessment is currently marked as "Not Rated."

Situated within the St. Paul District of the US Army Corps of Engineers, Carr #6 plays a crucial role in water resource management in the area. With a maximum discharge of 153 cubic feet per second, this dam serves as a key infrastructure for flood control and water storage. Although specific details about spillways, outlet gates, and associated structures are not provided, the dam's primary purpose and operational details remain undisclosed.

For water resource and climate enthusiasts, Carr #6 represents a vital component of the infrastructure that helps to safeguard the surrounding communities from potential flooding events. With its low hazard potential and state-regulated status, this dam serves as a testament to the importance of effective water management practices in ensuring the safety and sustainability of our water resources.

Year Completed

1957

Dam Length

540

Dam Height

26

River Or Stream

TRIB. PINE CREEK

Primary Dam Type

Earth

Hydraulic Height

26

Nid Storage

38

Hazard Potential

Low

Nid Height

26
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.