Scs-Cherokee Sandy Site-08c Reservoir Report
Last Updated: December 8, 2025
SCS-Cherokee Sandy Site-08c, located in Wynnewood, Oklahoma, is a state-regulated water resource project designed by the USDA NRCS with a primary purpose of flood risk reduction along the Willow Sandy Creek.
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Summary
Completed in 1963, this stone-core dam stands at a height of 29 feet and has a storage capacity of 406 acre-feet, serving a drainage area of 1.48 square miles. With a significant hazard potential and a fair condition assessment, this dam is equipped with controlled spillways and a valve outlet gate for efficient water management.
Despite its age, SCS-Cherokee Sandy Site-08c demonstrates a commitment to state oversight, with permitting, inspection, and enforcement conducted by the Oklahoma Water Resources Board. The dam's very high risk assessment rating underscores the importance of ongoing monitoring and maintenance efforts to ensure its continued effectiveness in mitigating flood risks. The presence of emergency action plans, inundation maps, and risk management measures will be crucial in safeguarding downstream communities in the event of a potential breach or failure.
As a key component of the Tulsa District's flood risk reduction infrastructure, SCS-Cherokee Sandy Site-08c plays a vital role in protecting lives and property in Garvin County. With its strategic location and design features, including a controlled spillway and valve outlet gate, this dam serves as a critical resource for managing water levels and reducing the impact of potential flooding events along the Willow Sandy Creek. Ongoing collaboration between state and federal agencies, coupled with proactive risk management practices, will be essential in ensuring the long-term resilience and effectiveness of this important water resource project.
Year Completed |
1963 |
Dam Length |
1120 |
Dam Height |
29 |
River Or Stream |
WILLOW SANDY CREEK |
Surface Area |
16 |
Hydraulic Height |
25 |
Drainage Area |
1.48 |
Nid Storage |
406 |
Structural Height |
29 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Pauls Valley
|
335cfs |
Rock Creek At Sulphur
|
8cfs |
Canadian River At Purcell
|
208cfs |
Walnut Creek At Purcell
|
29cfs |
Little River Near Tecumseh
|
7cfs |
Pennington Creek Near Reagan
|
7cfs |
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-Cherokee Sandy Site-08c