Scs-Cherokee Sandy Site-08a Reservoir Report
Last Updated: December 8, 2025
SCS-Cherokee Sandy Site-08a, located in Garvin, Oklahoma, is a state-regulated dam designed by USDA NRCS with a primary purpose of flood risk reduction.
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Summary
This earth dam, completed in 1965, stands at a height of 27 feet and has a hydraulic height of 23 feet, with a length of 1350 feet. The dam has a storage capacity of 570 acre-feet and a normal storage of 55 acre-feet, serving the TR-WILLOW SANDY CREEK watershed.
With a significant hazard potential and a fair condition assessment, SCS-Cherokee Sandy Site-08a is in need of regular inspections and maintenance to ensure its continued effectiveness in flood risk reduction. The dam has a controlled spillway and one outlet valve, with a maximum discharge capacity of 1300 cfs. The risk assessment for this dam is rated as very high, highlighting the importance of proper risk management measures and emergency preparedness.
Overall, SCS-Cherokee Sandy Site-08a plays a crucial role in mitigating flood risks in the area and protecting the surrounding communities. With state regulation and oversight from OWRB, this dam requires ongoing attention to maintain its functionality and safeguard against potential hazards. For water resource and climate enthusiasts, this site serves as a reminder of the vital role that infrastructure plays in managing and adapting to changing environmental conditions.
Year Completed |
1965 |
Dam Length |
1350 |
Dam Height |
27 |
River Or Stream |
TR-WILLOW SANDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
17 |
Hydraulic Height |
23 |
Nid Storage |
570 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
27 |
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-08a