Scs-Upper Bayou Site-18 Reservoir Report
Last Updated: December 20, 2025
SCS-Upper Bayou Site-18, located in Carter County, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS in 1977 for flood risk reduction along TR-Walnut Creek.
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Summary
With a structural height of 31 feet and a hydraulic height of 27 feet, this dam has a capacity to store 999 acre-feet of water and covers a surface area of 38 acres. The dam stretches 1420 feet in length and has a controlled spillway width of 2 feet, ensuring efficient water discharge during high flow events.
Despite being classified as having low hazard potential, the risk assessment for SCS-Upper Bayou Site-18 indicates a very high risk level. The dam is equipped with one valve outlet gate and has a designated inspection frequency of 5 years, with the last inspection conducted in 1980. The dam's condition assessment is currently not rated, and there is no emergency action plan (EAP) in place. The primary purpose of this dam is flood risk reduction, serving as a crucial infrastructure for water resource management in the region and highlighting the importance of ongoing monitoring and maintenance to ensure public safety and environmental protection.
Year Completed |
1977 |
Dam Length |
1420 |
Dam Height |
31 |
River Or Stream |
TR-WALNUT CREEK |
Primary Dam Type |
Earth |
Surface Area |
38 |
Hydraulic Height |
27 |
Nid Storage |
999 |
Structural Height |
31 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Mud Creek Near Courtney
|
0cfs |
Washita River Near Dickson
|
317cfs |
Rock Creek At Sulphur
|
8cfs |
Red River Near Gainesville
|
256cfs |
Red Rv Nr Terral
|
154cfs |
Belknap Ck Nr Ringgold
|
112cfs |
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-Upper Bayou Site-18