Scs-Cherokee Sandy Site-17 Reservoir Report
Last Updated: December 8, 2025
SCS-Cherokee Sandy Site-17, also known as R.
°F
°F
mph
Wind
%
Humidity
Summary
C. Longmire, is a state-regulated earth dam located in Garvin, Oklahoma, along the Cherokee Sandy Creek. Built in 1989 by the USDA NRCS, this dam serves as a vital flood risk reduction structure in the area. With a height of 54 feet and a length of 5400 feet, it holds a maximum storage capacity of 26,300 acre-feet and covers a surface area of 745 acres, providing protection to a drainage area of 28.52 square miles.
Despite its fair condition assessment and significant hazard potential, SCS-Cherokee Sandy Site-17 has a very high risk rating, underscoring the importance of regular inspections and maintenance. The dam features a controlled spillway with a width of 4 feet and a single valve outlet gate. The structure is state-regulated by the OWRB, with permitting, inspection, and enforcement processes in place to ensure its safety and functionality. As water resource and climate enthusiasts, understanding and monitoring the risk factors associated with this dam is crucial for mitigating potential hazards and safeguarding the surrounding community.
In the event of an emergency, the dam's emergency action plan (EAP) status is currently unknown, highlighting the need for updated emergency contacts, guidelines-compliant EAP preparation, and risk management measures. With a risk assessment rating of Very High (1), proactive measures to address any identified risks and maintain the integrity of SCS-Cherokee Sandy Site-17 are essential for ensuring the safety and resilience of this important flood control infrastructure in Oklahoma.
Year Completed |
1989 |
Dam Length |
5400 |
Dam Height |
54 |
River Or Stream |
CHEROKEE SANDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
745 |
Hydraulic Height |
54 |
Drainage Area |
28.52 |
Nid Storage |
26300 |
Structural Height |
54 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
54 |
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-17