Scs-Little Washita River Site-09 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Washita River Site-09 is a state-regulated dam located in Ninnekah, Oklahoma, designed by the USDA NRCS and completed in 1969.
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Summary
This earth dam stands at a height of 32 feet with a hydraulic height of 30 feet and a length of 1000 feet, providing flood risk reduction along the TR-Latheran Creek. With a primary purpose of flood risk reduction, the dam has a normal storage capacity of 94 acre-feet and a maximum storage of 476 acre-feet.
Despite being classified as having a low hazard potential, this dam is considered to have a very high risk according to the data provided. The dam features a controlled spillway and an outlet gate with one valve. Although the last inspection date is listed as January 1, 1980, the dam is reportedly inspected every five years. With a risk assessment rating of 1 (very high), there is a need for continued monitoring and potential risk management measures to ensure the safety and stability of the structure for the surrounding community and water resources in the area.
Year Completed |
1969 |
Dam Length |
1000 |
Dam Height |
32 |
River Or Stream |
TR-LATHERAN CR |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
30 |
Nid Storage |
476 |
Structural Height |
32 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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-09