Scs-Big Wewoka Creek Site-26 Reservoir Report
Last Updated: December 7, 2025
SCS-Big Wewoka Creek Site-26 is a state-owned Earth dam located in Seminole, Oklahoma, designed by the USDA NRCS with a height of 32 feet and a length of 2110 feet.
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Summary
Completed in 1960, its primary purpose is flood risk reduction for the TR-WEWOKA CR river/stream. The dam has a normal storage capacity of 308 acre-feet and a maximum storage of 1154 acre-feet, with a controlled spillway width of 2 feet.
This low hazard potential dam is regulated by the OWRB and undergoes state inspections, with a risk assessment rating of very high (1). While its condition is currently not rated, the dam has not been assessed since its last inspection in 1980. Despite its age, the dam's emergency action plan status and risk management measures remain unknown, highlighting the need for updated information and potential improvements to ensure its continued safety and effectiveness in managing flood risks in the region.
Located in the Tulsa District with a single outlet gate, SCS-Big Wewoka Creek Site-26 serves as a crucial infrastructure for flood control in the area, but its lack of recent assessments and emergency preparedness plans raises concerns about its long-term resilience in the face of increasingly unpredictable climate events. For water resource and climate enthusiasts, monitoring and enhancing the safety and efficiency of dams like this one is essential to mitigating the impacts of extreme weather events and safeguarding communities and ecosystems downstream.
Year Completed |
1960 |
Dam Length |
2110 |
Dam Height |
32 |
River Or Stream |
TR-WEWOKA CR |
Primary Dam Type |
Earth |
Surface Area |
52 |
Hydraulic Height |
32 |
Nid Storage |
1154 |
Structural Height |
32 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Wewoka Lake
|
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Sportsmans Lake
|
||
Holdenville Lake
|
Scs-Big Wewoka Creek Site-26