Scs-Big Wewoka Creek Site-20 Reservoir Report
Last Updated: December 8, 2025
SCS-Big Wewoka Creek Site-20, located in Seminole, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS in 1963 for flood risk reduction along TR-WEWOKA CR.
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Summary
With a height of 32 feet, a length of 1205 feet, and a capacity of 1030 acre-feet, this dam plays a crucial role in managing water resources in the area. The dam's spillway, controlled by a 2-foot wide structure, ensures the safe release of excess water during heavy rainfall events.
Despite being classified as having a significant hazard potential, SCS-Big Wewoka Creek Site-20 is currently in fair condition, with the last inspection conducted in 2011. The dam is equipped with a valve outlet gate for water release and is under the jurisdiction of the Oklahoma Water Resources Board for permitting, inspection, and enforcement. With a risk assessment rating of very high, it is essential for stakeholders and authorities to closely monitor and implement risk management measures to ensure the safety and functionality of this vital infrastructure for water resource management in the region.
Year Completed |
1963 |
Dam Length |
1205 |
Dam Height |
32 |
River Or Stream |
TR-WEWOKA CR |
Primary Dam Type |
Earth |
Surface Area |
44 |
Hydraulic Height |
32 |
Nid Storage |
1030 |
Structural Height |
32 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
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.
Scs-Big Wewoka Creek Site-20