Scs-South Clinton Laterals Site-L11 Reservoir Report
Last Updated: December 6, 2025
The SCS-South Clinton Laterals Site-L11 is a state-owned flood risk reduction dam located in Washita County, Oklahoma, near the town of Parkersburg.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1969 by the USDA NRCS, the dam serves the primary purpose of mitigating flooding along the TO-Washita River. With a height of 27 feet and a length of 3800 feet, the earth dam has a storage capacity of 249 acre-feet and a normal storage level of 83 acre-feet.
Although the dam has a low hazard potential, it is classified as having a very high risk due to its condition assessment not being rated. The structure features a controlled spillway and a single valve outlet gate. Despite its age, the dam has not been inspected since 1980 and is due for a reassessment as part of its mandated 5-year inspection frequency. The SCS-South Clinton Laterals Site-L11 is under the jurisdiction of the Oklahoma Water Resources Board and is regulated, permitted, inspected, and enforced by the state regulatory agency.
Water resource and climate enthusiasts interested in the management and maintenance of flood control infrastructure will find the SCS-South Clinton Laterals Site-L11 to be a fascinating case study. The dam's location along the TO-Washita River in a high-risk area highlights the importance of regular inspections and upkeep to ensure public safety and prevent potential disasters. As the dam approaches its 50th anniversary, stakeholders may advocate for updated risk assessments and emergency action plans to address the evolving environmental conditions and potential hazards.
Year Completed |
1969 |
Dam Length |
3800 |
Dam Height |
27 |
River Or Stream |
TO-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
24 |
Nid Storage |
249 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Clinton
|
32cfs |
Washita River Near Foss
|
6cfs |
Washita River Near Hammon
|
7cfs |
Cobb Creek Near Eakly
|
16cfs |
Lake Creek Near Eakly
|
4cfs |
North Fork Red River Near Carter
|
21cfs |
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-South Clinton Laterals Site-L11
Foss Reservoir Near Foss
Evening Lions Club Park
Nance Rotary Park
Foss State Park