Scs-Big Wewoka Creek Site-12 Reservoir Report
Last Updated: December 8, 2025
SCS-Big Wewoka Creek Site-12 is a state-regulated earth dam located in Seminole, Oklahoma, designed by the USDA NRCS and completed in 1959.
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Summary
With a height, hydraulic height, and structural height of 23 feet, this dam serves the primary purpose of flood risk reduction along the TR-WEWOKA CREEK. It has a maximum storage capacity of 287 acre-feet and a normal storage of 62 acre-feet, covering a surface area of 14 acres.
Despite being classified as having a low hazard potential, this dam poses a very high risk according to the risk assessment, indicating the need for careful monitoring and management. The dam features a controlled spillway and a valve outlet gate, with regular inspections mandated every 5 years. While the condition assessment is currently not rated, the dam's condition and risk assessment are crucial factors to consider for water resource and climate enthusiasts interested in the resilience and sustainability of water infrastructure in the region.
Oklahoma's OWRB is the state regulatory agency overseeing SCS-Big Wewoka Creek Site-12, ensuring that the dam meets all state permitting, inspection, and enforcement requirements. With a detailed overview of the dam's specifications, purpose, and risk profile, this site serves as a valuable case study for understanding the intersection of water resource management and climate resilience in the face of increasing environmental challenges.
Year Completed |
1959 |
Dam Length |
850 |
Dam Height |
23 |
River Or Stream |
TR-WEWOKA CREEK |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
23 |
Nid Storage |
287 |
Structural Height |
23 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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-12