Scs-Little Washita River Site-39 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Washita River Site-39, located in Ninnekah, Oklahoma, is a state-regulated earth dam designed by USDA NRCS for flood risk reduction along TR-West Bills Creek.
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Summary
Completed in 1978, the dam stands at a height of 35 feet and has a storage capacity of 650 acre-feet. The dam's spillway is controlled with a width of 1 foot, and it has one valve outlet gate for water release.
Despite being in fair condition as of the last inspection in 2011, SCS-Little Washita River Site-39 has a significant hazard potential and is categorized as having a very high risk level. The dam's risk assessment score is 1, indicating a need for heightened attention to maintenance and emergency preparedness. The dam is under the jurisdiction of the Oklahoma Water Resources Board (OWRB) and undergoes regular state inspections, permitting, and enforcement to ensure its safety and functionality for flood control in the area. For water resource and climate enthusiasts, this site offers a fascinating example of engineering for managing water resources and mitigating flood risks in the region.
Year Completed |
1978 |
Dam Length |
1260 |
Dam Height |
35 |
River Or Stream |
TR-WEST BILLS CR |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
32 |
Nid Storage |
650 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
35 |
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-39
Scs Pond No. 26 Near Cyril