Scs-Stillwater Creek Site-12 Reservoir Report
Last Updated: December 7, 2025
SCS-Stillwater Creek Site-12 is a state-regulated dam located in Payne County, Oklahoma, specifically in the city of MEHAN.
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Summary
The dam was designed by the USDA NRCS and completed in 1987 for the primary purpose of flood risk reduction along the TR STILLWATER CREEK. This earth dam stands at a height of 30 feet and has a length of 1075 feet, with a storage capacity of 910 acre-feet and a normal storage capacity of 82 acre-feet.
The dam has a controlled spillway type with a width of 1 foot and is equipped with a valve outlet gate. Despite being rated as having a low hazard potential, the dam is considered to have a very high risk level (1) based on the risk assessment. It is under state jurisdiction and regulation by the Oklahoma Water Resources Board (OWRB), with permitting, inspection, and enforcement responsibilities managed by the state agency. The dam is regularly inspected every 5 years, with the last inspection recorded in 1980 and the condition currently assessed as not rated.
Overall, SCS-Stillwater Creek Site-12 serves as an important infrastructure for flood risk reduction in the region, ensuring the protection of local communities and properties from potential water-related disasters. As a part of the state's water resource management efforts, this dam plays a crucial role in managing water flow, storage, and discharge along the TR STILLWATER CREEK, contributing to the overall resilience of the area against floods and other hydrological risks. Climate and water resource enthusiasts can appreciate the technical details and management aspects of this dam, as well as its significance in enhancing the safety and sustainability of the local environment.
Year Completed |
1987 |
Dam Length |
1075 |
Dam Height |
30 |
River Or Stream |
TR STILLWATER CREEK |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
30 |
Drainage Area |
2.8 |
Nid Storage |
910 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cimarron River Near Ripley
|
544cfs |
Black Bear Creek At Pawnee
|
11cfs |
Cimarron River Near Guthrie
|
489cfs |
Deep Fork At Warwick
|
23cfs |
Arkansas River At Ralston
|
1820cfs |
Cottonwood Creek Near Seward
|
70cfs |
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-12
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