Scs-Little Washita River Site-24 Reservoir Report

Last Updated: December 6, 2025

SCS-Little Washita River Site-24, located in Caddo County, Oklahoma, is a state-regulated earth dam constructed in 1976 by the USDA NRCS.


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Summary

The primary purpose of this dam is flood risk reduction along the TR-Little Washita River. Standing at a height of 53 feet, with a hydraulic height of 51 feet, and a length of 840 feet, this dam has a storage capacity of 590 acre-feet and a normal storage of 112 acre-feet. With a spillway type of "Controlled" and a hazard potential rated as "High", this dam plays a crucial role in managing water resources in the area.

Despite being classified as having a fair condition assessment, SCS-Little Washita River Site-24 poses a very high risk due to its location and potential impact in case of failure. The dam is equipped with a valve outlet gate and undergoes regular inspections, with the last inspection conducted in August 2011. The dam is under the jurisdiction of the Oklahoma Water Resources Board (OWRB) and is designed to meet state permitting, inspection, and enforcement standards. This site serves as a vital component in the overall water resource management and flood control efforts in the region, highlighting the importance of maintaining its structural integrity and operational readiness for climate enthusiasts and stakeholders alike.

Year Completed

1976

Dam Length

840

Dam Height

53

River Or Stream

TR-LITTLE WASHITA RIVER

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

51

Nid Storage

590

Structural Height

53

Outlet Gates

Valve - 1

Hazard Potential

High

Foundations

Soil

Nid Height

53
       
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.