Scs-Fort Cobb Laterals Site-002 Reservoir Report

Last Updated: December 6, 2025

SCS-Fort Cobb Laterals Site-002 in Carnegie, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS for flood risk reduction on the TR-Washita River.


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Summary

Completed in 1975, this dam stands at 49 feet high with a storage capacity of 203 acre-feet. With a controlled spillway and one valve outlet gate, it serves as a crucial structure in managing water resources and protecting the surrounding area from potential flooding events.

Despite being classified as having a low hazard potential, the risk assessment for SCS-Fort Cobb Laterals Site-002 indicates a very high risk level, which highlights the importance of proper monitoring and maintenance. While the structure has not been rated for condition assessment, it is regularly inspected every five years. The dam's location in Caddo County, Oklahoma, under the jurisdiction of OWRB, underscores the critical role it plays in water management within the region.

As a key component in the Tulsa District's flood risk reduction efforts, SCS-Fort Cobb Laterals Site-002 remains a vital infrastructure for water resource management in Oklahoma. Its strategic design, state regulation, and high-risk assessment underscore the significance of this earth dam in safeguarding the area against potential flooding and ensuring the effective utilization of water resources in the region.

Year Completed

1975

Dam Length

850

Dam Height

49

River Or Stream

TR-WASHITA RIVER

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

46

Nid Storage

203

Structural Height

49

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

49
       
Seasonal Comparison

Weather Forecast

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.