Scs-Little Washita River Site-14 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Washita River Site-14 is a state-owned flood risk reduction structure located in Ninnekah, Oklahoma.
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Summary
Designed by USDA NRCS, this Earth-type dam stands at 40 feet tall with a hydraulic height of 37 feet and a length of 1100 feet. Completed in 1978, it has a storage capacity of 770 acre-feet and a normal storage of 151 acre-feet, serving the primary purpose of flood risk reduction along the Charlie Creek.
Managed by the Oklahoma Water Resources Board, this low hazard potential structure has a controlled spillway and a single valve outlet gate. Despite its very high risk assessment rating, the dam's condition remains unrated as of the last inspection in 1980. While it meets state regulations and permitting requirements, its inspection frequency is set at 5 years, indicating a need for periodic monitoring and maintenance to ensure its continued effectiveness in mitigating flood risks in the region.
With the potential to discharge up to 1665 cubic feet per second, this dam plays a crucial role in managing floodwaters and protecting the surrounding area from inundation. As water resource and climate enthusiasts, it is essential to recognize the importance of such structures in safeguarding communities and ecosystems against the impacts of extreme weather events, highlighting the need for ongoing assessment and management to enhance resilience in the face of a changing climate.
Year Completed |
1978 |
Dam Length |
1100 |
Dam Height |
40 |
River Or Stream |
CHARLIE CREEK |
Primary Dam Type |
Earth |
Surface Area |
28 |
Hydraulic Height |
37 |
Nid Storage |
770 |
Structural Height |
40 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
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-14