Scs-Little Washita River Site-45 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Washita River Site-45, located in Ninnekah, Oklahoma, is a state-regulated dam designed by USDA NRCS for flood risk reduction along Hog Creek.
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Summary
Completed in 1969, this earth dam stands at 24 feet high with a hydraulic height of 22 feet and a structural height of 24 feet. With a storage capacity of 112 acre-feet and a normal storage of 31 acre-feet, this dam plays a crucial role in managing water flow and reducing the risk of flooding in the area.
The dam features a controlled spillway with a width of 1 foot and an outlet gate consisting of a single valve. Despite being rated as having a low hazard potential and not having a current condition assessment, the risk assessment for this site is deemed very high. With a history of state inspection, enforcement, and permitting, the SCS-Little Washita River Site-45 is an essential infrastructure for water resource management in Grady County, Oklahoma.
For water resource and climate enthusiasts, the SCS-Little Washita River Site-45 offers a fascinating case study in dam construction and management. From its design by the Natural Resources Conservation Service to its purpose of flood risk reduction, this site serves as a key component in the efforts to mitigate the impact of extreme weather events in the region. With its historical significance and ongoing regulatory oversight, this dam exemplifies the intersection of engineering, environmental protection, and public safety in safeguarding water resources for the community.
Year Completed |
1969 |
Dam Length |
820 |
Dam Height |
24 |
River Or Stream |
HOG CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
22 |
Nid Storage |
112 |
Structural Height |
24 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
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-45