Scs-Big Wewoka Creek Site-15 Reservoir Report
Last Updated: December 8, 2025
Located in Seminole, Oklahoma, the SCS-Big Wewoka Creek Site-15 is a state-regulated earth dam designed by the USDA NRCS and completed in 1959 for flood risk reduction along the TR-WEWOKA CR river.
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Summary
With a dam height of 21 feet and a length of 950 feet, this structure has a storage capacity of 217 acre-feet and a maximum discharge of 1110 cubic feet per second. The spillway type is controlled, with a width of 1 foot, and the hazard potential is rated as low, making it a vital component for managing water resources in the area.
Even though the dam's condition is currently not rated, it undergoes inspection every 5 years to ensure its structural integrity. The primary purpose of the SCS-Big Wewoka Creek Site-15 is flood risk reduction, and it has a normal storage capacity of 47 acre-feet, serving as a critical infrastructure for water resource management in the region. Despite being state-regulated by OWRB, the dam does not have an Emergency Action Plan (EAP) prepared, highlighting the need for continued monitoring and preparedness for potential emergency situations. The risk assessment for the site is classified as very high (1), emphasizing the importance of implementing effective risk management measures to safeguard the surrounding community and environment from potential hazards.
Year Completed |
1959 |
Dam Length |
950 |
Dam Height |
21 |
River Or Stream |
TR-WEWOKA CR |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
21 |
Nid Storage |
217 |
Structural Height |
21 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
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-15