Scs-Little Washita River Site-26 Reservoir Report

Last Updated: December 6, 2025

SCS-Little Washita River Site-26, located in Caddo, Oklahoma, is a state-regulated dam constructed in 1971 by the USDA NRCS.


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Summary

This earth dam stands at a height of 57 feet, with a hydraulic height of 51 feet, serving primarily for flood risk reduction along the Little Washita River. The dam has a storage capacity of 1310 acre-feet, with a normal storage of 350 acre-feet and a surface area of 27 acres.

With a hazard potential rated as high and a condition assessment marked as fair, SCS-Little Washita River Site-26 presents an intriguing case for water resource and climate enthusiasts. The dam's emergency action plan status, risk assessment, and management measures are areas that may warrant further investigation. The controlled spillway, valve outlet gates, and very high risk rating also contribute to the complexity and importance of this site in terms of flood control and mitigation efforts in the region.

Overall, SCS-Little Washita River Site-26 offers a rich opportunity for studying the intersection of water resource management, climate resilience, and emergency preparedness in the face of increasing flood risks. Its location in a picturesque setting along the Little Washita River adds to its appeal for researchers and enthusiasts interested in exploring the dynamics of dam infrastructure and its role in safeguarding communities from natural disasters.

Year Completed

1971

Dam Length

1140

Dam Height

57

River Or Stream

LITTLE WASHITA RIVER

Primary Dam Type

Earth

Surface Area

27

Hydraulic Height

51

Nid Storage

1310

Structural Height

57

Outlet Gates

Valve - 1

Hazard Potential

High

Foundations

Soil

Nid Height

57
       
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.