Scs-Big Wewoka Creek Site-34 Reservoir Report

Last Updated: December 7, 2025

SCS-Big Wewoka Creek Site-34, located in Wetumka, Oklahoma, is a state-regulated earth dam designed by USDA NRCS and completed in 1959 for flood risk reduction on TR-Long George Creek.


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Summary

This dam stands at a height of 30 feet and has a length of 1260 feet, providing a normal storage capacity of 61 acre-feet and a maximum storage of 419 acre-feet. With a controlled spillway and one valve outlet gate, the dam has a hazard potential rated as low and a very high risk assessment score of 1.

Despite not having a recent condition assessment, SCS-Big Wewoka Creek Site-34 is inspected every five years and is maintained by the Oklahoma Water Resources Board. The dam's structural height, hydraulic height, and NID height all measure at 30 feet, ensuring its effectiveness in flood risk reduction. With minimal associated structures and no locks, this dam is key in protecting the surrounding area from potential inundation events. For water resource and climate enthusiasts, this site serves as an example of successful dam infrastructure for managing water flow and mitigating flood risks in the region.

Year Completed

1959

Dam Length

1260

Dam Height

30

River Or Stream

TR-LONG GEORGE CR

Primary Dam Type

Earth

Surface Area

16

Hydraulic Height

30

Nid Storage

419

Structural Height

30

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

30
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.