Scs-Pennington Creek Site-2 Reservoir Report

Last Updated: December 19, 2025

SCS-Pennington Creek Site-2, located in Johnston County, Oklahoma, is a state-regulated earth dam constructed in 1953 by the USDA NRCS.


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Summary

The primary purpose of this dam is flood risk reduction along the TR-Pennington Creek. Standing at a height of 30 feet with a hydraulic height of 25 feet, this dam spans a length of 1,010 feet and has a maximum discharge capacity of 3,200 cubic feet per second.

With a normal storage capacity of 207 acre-feet and a maximum storage of 1,010 acre-feet, SCS-Pennington Creek Site-2 covers a surface area of 38 acres. The dam is equipped with a controlled spillway and a single valve outlet gate. Despite being rated as having a low hazard potential, the dam's risk assessment is classified as very high (1). The last inspection of the structure was conducted in 1980, with an inspection frequency of every 5 years.

As an essential infrastructure for managing flood risks in the region, the SCS-Pennington Creek Site-2 serves as a critical component of water resource management in the area. Its design and construction by the USDA NRCS reflect a commitment to safeguarding the local community from potential flooding events. Moving forward, continued monitoring and maintenance of this dam will be crucial to ensure its effectiveness in reducing flood risks and protecting the surrounding environment.

Year Completed

1953

Dam Length

1010

Dam Height

30

River Or Stream

TR-PENNINGTON CREEK

Primary Dam Type

Earth

Surface Area

38

Hydraulic Height

25

Nid Storage

1010

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.