Scs-Big Wewoka Creek Site-27 Reservoir Report
Nearby: Wewoka Scs-Big Wewoka Creek Site-29
Last Updated: December 7, 2025
SCS-Big Wewoka Creek Site-27 is a state-regulated earth dam located in Seminole, Oklahoma, with a primary purpose of flood risk reduction.
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Summary
Built in 1960 by the USDA NRCS, this dam stands at a height of 25 feet and spans a length of 1025 feet, with a maximum storage capacity of 570 acre-feet and a normal storage capacity of 151 acre-feet. The dam has a controlled spillway with a width of 1 foot and is equipped with a single valve outlet gate for water release.
Despite its low hazard potential, the risk assessment for SCS-Big Wewoka Creek Site-27 indicates a very high risk level. The dam has not been inspected since 1980, with an inspection frequency of 5 years. The condition assessment is currently not rated, and there is no emergency action plan in place. With the potential for high risk in the event of a breach, there is a need for updated inspections, condition assessments, and emergency preparedness measures to ensure the safety of downstream communities and water resources.
Year Completed |
1960 |
Dam Length |
1025 |
Dam Height |
25 |
River Or Stream |
TR-WEWOKA CREEK |
Primary Dam Type |
Earth |
Surface Area |
30 |
Hydraulic Height |
25 |
Nid Storage |
570 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
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-27