Scs-Cherokee Sandy Site-04 Reservoir Report
Last Updated: December 8, 2025
SCS-Cherokee Sandy Site-04, located in Garvin, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS in 1963 for Flood Risk Reduction along the TR-WILLOW CREEK.
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Summary
Standing at 32 feet tall with a hydraulic height of 28 feet and a structural height of 32 feet, this dam has a maximum storage capacity of 460 acre-feet and a normal storage capacity of 63 acre-feet. With a surface area of 16 acres and a spillway type of Controlled, this dam serves the primary purpose of Flood Risk Reduction and is owned by the state.
Despite being rated as having a low hazard potential and not being inspected since 1980, SCS-Cherokee Sandy Site-04 poses a very high risk, warranting attention and potential risk management measures. With one valve outlet gate and no associated structures, this dam remains in a condition assessment of "Not Rated" and lacks updated emergency action plans and inundation maps. The risk assessment for this dam remains at a very high level (1), indicating the need for further inspection and potential improvements to ensure safety and risk mitigation for the surrounding area.
Year Completed |
1963 |
Dam Length |
1010 |
Dam Height |
32 |
River Or Stream |
TR-WILLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
28 |
Nid Storage |
460 |
Structural Height |
32 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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-04