Scs-Cherokee Sandy Site-11 Reservoir Report
Last Updated: December 8, 2025
SCS-Cherokee Sandy Site-11, located in Wynnewood, Oklahoma, is a state-regulated dam with a primary purpose of flood risk reduction.
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Summary
Completed in 1983 by the USDA NRCS, this earth dam stands at a height of 35 feet and spans 1050 feet in length, providing essential storage capacity of 578 acre-feet. The dam, built on Cherokee Sandy Creek, has a controlled spillway and a valve outlet gate to manage water flow.
With a hazard potential rated as high and a condition assessment marked as fair, SCS-Cherokee Sandy Site-11 is a critical infrastructure for the area's flood protection. The dam's risk assessment is categorized as very high, emphasizing the importance of regular inspections and maintenance. While the dam meets state permitting and inspection requirements, its risk management measures and emergency action plan status are not fully detailed, highlighting potential areas for improvement in disaster preparedness.
As part of the flood risk mitigation strategy in the region, SCS-Cherokee Sandy Site-11 plays a crucial role in protecting the surrounding Garvin County, Oklahoma, from potential inundation events. Its design and construction by the USDA NRCS reflect a commitment to sustainable water resource management, but ongoing monitoring and maintenance are essential to ensure the dam's long-term resilience in the face of changing climate conditions.
Year Completed |
1983 |
Dam Length |
1050 |
Dam Height |
35 |
River Or Stream |
TR-CHEROKEE SANDY CR |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
35 |
Drainage Area |
1.88 |
Nid Storage |
578 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Pauls Valley
|
335cfs |
Rock Creek At Sulphur
|
8cfs |
Walnut Creek At Purcell
|
29cfs |
Canadian River At Purcell
|
208cfs |
Pennington Creek Near Reagan
|
7cfs |
Washita River Near Dickson
|
324cfs |
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-11