Scs-Cowden Laterals Site-006 Reservoir Report

Last Updated: December 6, 2025

SCS-Cowden Laterals Site-006, located in Carnegie, Oklahoma, is a state-regulated earth dam designed by USDA NRCS with a primary purpose of flood risk reduction on the TR-Washita River.


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Summary

Completed in 1972, this dam stands at a height of 43 feet and has a storage capacity of 165 acre-feet, providing essential flood control measures for the surrounding area. The dam's low hazard potential and very high risk assessment rating highlight its importance in safeguarding the community from potential flood events.

Managed by the Oklahoma Water Resources Board (OWRB), SCS-Cowden Laterals Site-006 features a controlled spillway and a single valve outlet gate for water control. Despite its age, the dam's condition assessment remains unrated, emphasizing the need for regular inspections and maintenance to ensure its continued effectiveness. With the potential for high-risk situations due to its location and purpose, the dam serves as a critical infrastructure for flood management in Washita County.

As a key component of the flood risk reduction strategy in the area, SCS-Cowden Laterals Site-006 plays a vital role in protecting lives and property from the devastating impacts of flooding. With its strategic placement along the TR-Washita River and state-regulated oversight, this earth dam serves as a testament to the ongoing efforts to manage water resources and mitigate the effects of climate change on vulnerable communities.

Year Completed

1972

Dam Length

880

Dam Height

43

River Or Stream

TR-WASHITA RIVER

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

41

Nid Storage

165

Structural Height

43

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

43
       
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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.