Scs-Little Washita River Site-11 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Washita River Site-11, located in Ninnekah, Oklahoma, is a state-regulated earth dam constructed in 1973 by the USDA NRCS.
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Summary
This flood risk reduction structure on Boggy Creek stands at a height of 42 feet and has a hydraulic height of 40 feet, with a capacity to store up to 153 acre-feet of water. The dam spans 920 feet in length and serves the primary purpose of flood risk reduction, making it an essential asset for water resource management in the region.
Managed by the Oklahoma Water Resources Board, this dam has a controlled spillway with a width of 1 foot and a low hazard potential. Despite being constructed almost five decades ago, the condition assessment of SCS-Little Washita River Site-11 is currently not rated, highlighting the need for further evaluation and maintenance. With a very high risk assessment rating of 1, there is a clear urgency for continued monitoring and risk management measures to ensure the safety and effectiveness of this critical infrastructure in the face of changing climate patterns and water resource demands.
Year Completed |
1973 |
Dam Length |
920 |
Dam Height |
42 |
River Or Stream |
BOGGY CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
40 |
Nid Storage |
153 |
Structural Height |
42 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
42 |
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-11