Scs-Big Wewoka Creek Site-13 Reservoir Report
Last Updated: December 8, 2025
Located in Seminole, Oklahoma, the SCS-Big Wewoka Creek Site-13 dam is a state-regulated structure designed by the USDA NRCS for flood risk reduction along the TR-WEWOKA CR river.
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Summary
Completed in 1959, this earth dam stands at a height of 25 feet and spans 990 feet in length, providing storage of 555 acre-feet with a normal storage capacity of 148 acre-feet. With a controlled spillway and a hazard potential rated as high, this dam is equipped with a single valve outlet gate for water management.
Despite its fair condition assessment, the SCS-Big Wewoka Creek Site-13 dam poses a very high risk, as indicated by the dam safety authorities. The structure is subject to state regulations and inspections by the OWRB, ensuring its ongoing compliance with safety standards. With a primary purpose of flood risk reduction, this dam plays a crucial role in managing water flow and protecting downstream areas from potential inundation. For water resource and climate enthusiasts, this site offers a fascinating example of engineering for water management in a dynamic environment.
Year Completed |
1959 |
Dam Length |
990 |
Dam Height |
25 |
River Or Stream |
TR-WEWOKA CR |
Primary Dam Type |
Earth |
Surface Area |
26 |
Hydraulic Height |
25 |
Nid Storage |
555 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
25 |
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-Big Wewoka Creek Site-13