Scs-Cotton-Coon-Mission Cr Site-12d Reservoir Report
Last Updated: December 8, 2025
SCS-Cotton-Coon-Mission Cr Site-12d, located in Washington County, Oklahoma, is a state-regulated dam designed by the USDA NRCS with a primary purpose of flood risk reduction.
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Summary
Completed in 1981, this earth dam stands at a height of 32 feet and stretches 1550 feet in length, providing a storage capacity of 1125 acre-feet for floodwaters from the TR-Cedar Creek. With a controlled spillway and a hazard potential rated as low, this dam plays a crucial role in mitigating the risk of flooding in the region.
Despite its age, SCS-Cotton-Coon-Mission Cr Site-12d has not been rated for its condition assessment, and the last inspection dates back to 1980. However, the dam's risk assessment is classified as very high, emphasizing the need for regular maintenance and monitoring. With one valve outlet gate and a drainage area of 18 acres, this dam has a maximum discharge capacity of 560 cubic feet per second, ensuring efficient water flow control during heavy rainfall events. As climate change continues to impact precipitation patterns, the importance of properly maintaining and managing this dam for flood protection cannot be overstated.
As part of the Tulsa District under the oversight of the Oklahoma Water Resources Board, SCS-Cotton-Coon-Mission Cr Site-12d not only serves as a critical infrastructure for flood risk reduction but also highlights the collaborative efforts between federal and state agencies in managing water resources. With a focus on environmental conservation and sustainable water management practices, this dam stands as a testament to the ongoing commitment to protecting communities and ecosystems from the impacts of extreme weather events.
Year Completed |
1981 |
Dam Length |
1550 |
Dam Height |
32 |
River Or Stream |
TR-CEDAR CR |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
32 |
Nid Storage |
1125 |
Structural Height |
32 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Caney River Above Coon Creek At Bartlesville
|
63cfs |
Verdigris River Near Lenapah
|
1050cfs |
Verdigris R At Coffeyville
|
927cfs |
Caney River Near Ramona
|
70cfs |
Verdigris R At Independence
|
789cfs |
Bird Creek At Avant
|
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Washington Cove - Copan Lake
|
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Post Oak Park - Copan Lake
|
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Johnstone Park
|
Scs-Cotton-Coon-Mission Cr Site-12d