Scs-Little Wewoka Creek Site-12 Reservoir Report
Last Updated: December 6, 2025
SCS-Little Wewoka Creek Site-12 is a state-regulated earth dam located in Wetumka, Oklahoma, designed by the USDA NRCS and completed in 1959 for the primary purpose of flood risk reduction along TR-GRAVES CREEK.
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Summary
The dam stands at a height of 30 feet with a length of 1275 feet, providing a storage capacity of 672 acre-feet. Despite its low hazard potential, the risk assessment for this structure is rated very high (1), highlighting the importance of regular inspections and maintenance to ensure its safety and effectiveness in managing potential flood events.
Owned by the state of Oklahoma and regulated by the OWRB, SCS-Little Wewoka Creek Site-12 has not been rated for its condition assessment, and the last inspection was conducted in 1980 with a frequency of every 5 years. With a controlled spillway and one valve outlet gate, the dam has a maximum discharge capacity of 1900 cfs and a surface area of 24 acres. Although no emergency action plan (EAP) is currently prepared or updated for this site, it is crucial for stakeholders to consider implementing risk management measures to address the identified high-risk factors associated with the dam's operation and potential inundation scenarios.
For water resource and climate enthusiasts, SCS-Little Wewoka Creek Site-12 serves as a significant infrastructure for flood risk mitigation in Hughes County, Oklahoma. With its historical construction and ongoing state regulation, this earth dam plays a crucial role in protecting the surrounding areas from potential flooding events along TR-GRAVES CREEK. As the risk assessment indicates a very high level of risk, continuous monitoring, inspection, and potential risk management measures are essential to ensure the long-term safety and functionality of this important water resource structure.
Year Completed |
1959 |
Dam Length |
1275 |
Dam Height |
30 |
River Or Stream |
TR-GRAVES CREEK |
Primary Dam Type |
Earth |
Surface Area |
24 |
Hydraulic Height |
30 |
Nid Storage |
672 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canadian River Near Wetumka
|
209cfs |
Canadian River At Calvin
|
361cfs |
Little River Near Sasakwa
|
12cfs |
North Canadian River At Shawnee
|
177cfs |
Little River Near Tecumseh
|
8cfs |
Deep Fork Near Beggs
|
141cfs |
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-Little Wewoka Creek Site-12