Scs-Pennington Creek Site-3 Reservoir Report
Last Updated: December 19, 2025
Located in Mill Creek, Johnston County, Oklahoma, SCS-Pennington Creek Site-3 is a state-owned structure designed by USDA NRCS to reduce flood risk along the TR-Pennington Creek.
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Summary
Completed in 1953, this earthen dam stands at a height of 40 feet with a hydraulic height of 35 feet and a length of 2080 feet. With a storage capacity of 918 acre-feet and a normal storage of 103 acre-feet, the dam serves the primary purpose of flood risk reduction while being regulated by the Oklahoma Water Resources Board.
Despite its low hazard potential, SCS-Pennington Creek Site-3 has a very high risk assessment rating, indicating potential vulnerabilities that require attention. The dam features a controlled spillway, one valve outlet gate, and a stone core foundation on soil. While the structure has not been inspected since 1980 and is currently not rated for its condition, it remains under state jurisdiction with permitting, inspection, and enforcement protocols in place. For water resource and climate enthusiasts, this site presents an opportunity for monitoring and management to ensure the safety and efficiency of its flood risk reduction functions in the face of changing environmental conditions.
Year Completed |
1953 |
Dam Length |
2080 |
Dam Height |
40 |
River Or Stream |
TR-PENNINGTON CREEK |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
35 |
Nid Storage |
918 |
Structural Height |
40 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pennington Creek Near Reagan
|
57cfs |
Rock Creek At Sulphur
|
8cfs |
Blue River Near Connerville
|
49cfs |
Washita River Near Dickson
|
319cfs |
Washita River Near Pauls Valley
|
327cfs |
Little River Near Sasakwa
|
9cfs |
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.
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Scs-Pennington Creek Site-3