Scs-Stillwater Creek Site-02 Reservoir Report
Last Updated: December 7, 2025
SCS-Stillwater Creek Site-02 is a state-regulated dam located in Payne County, Oklahoma, specifically in the city of Mehan.
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Summary
Built in 1967 by USDA NRCS, this earth dam stands at 27 feet high with a hydraulic height of 24 feet, serving primarily for flood risk reduction along the TR-Little Stillwater Creek. With a storage capacity of 124 acre-feet, the dam is equipped with a controlled spillway and a single valve outlet gate.
Despite being classified as a low hazard potential structure, SCS-Stillwater Creek Site-02 is deemed to have a very high risk of failure according to the risk assessment, highlighting the importance of regular inspections and maintenance. Although the last inspection dates back to 1980, the dam is mandated for inspection every 5 years, with the condition currently not rated. Ensuring the safety of surrounding communities, the State of Oklahoma, through OWRB, enforces inspection, permitting, and enforcement of this critical infrastructure.
With Congressman Frank D. Lucas representing the area, there is a need for heightened vigilance and risk management measures for SCS-Stillwater Creek Site-02. As water resource and climate enthusiasts, understanding the complexities of dam safety and the potential implications of a breach is crucial in safeguarding lives and properties downstream. The data provided underscores the importance of proactive measures to mitigate risks and ensure the resilience of our water infrastructure in the face of changing climatic conditions.
Year Completed |
1967 |
Dam Length |
640 |
Dam Height |
27 |
River Or Stream |
TR-LITTLE STILLWATER CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
24 |
Nid Storage |
124 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cimarron River Near Ripley
|
528cfs |
Black Bear Creek At Pawnee
|
11cfs |
Deep Fork At Warwick
|
23cfs |
Cimarron River Near Guthrie
|
483cfs |
Arkansas River At Ralston
|
1660cfs |
Cottonwood Creek Near Seward
|
69cfs |
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-Stillwater Creek Site-02
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