Scs-Little Washita River Site-43 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Washita River Site-43, located in Ninnekah, Oklahoma, is a state-regulated earth dam constructed in 1972 by the USDA NRCS for flood risk reduction along TR-East Bills Creek.
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Summary
Standing at a height of 45 feet with a hydraulic height of 27 feet, this dam has a storage capacity of 109 acre-feet and a maximum discharge of 438 cubic feet per second. With a controlled spillway and a low hazard potential, this structure plays a crucial role in managing water flow and reducing flood risks in the area.
Owned by the state and regulated by the Oklahoma Water Resources Board, SCS-Little Washita River Site-43 is inspected every 5 years to ensure its structural integrity and functionality. The dam features a valve outlet gate and is designed with stone core materials and a soil foundation. Despite being classified as "Very High (1)" in terms of risk assessment, the dam is considered to have a low hazard potential. While its condition assessment is currently not rated, the dam continues to serve its primary purpose of flood risk reduction effectively.
With a length of 670 feet and a surface area of 4 acres, SCS-Little Washita River Site-43 provides essential flood protection for the surrounding area in Grady County, Oklahoma. As climate change continues to impact water resources and weather patterns, structures like this dam play a critical role in mitigating flood risks and ensuring the sustainable management of water resources in the region.
Year Completed |
1972 |
Dam Length |
670 |
Dam Height |
45 |
River Or Stream |
TR-EAST BILLS CR |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
27 |
Nid Storage |
109 |
Structural Height |
45 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Scs-Little Washita River Site-43
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