Scs-Tri-County Turkey Creek Site-29a Reservoir Report
Last Updated: December 21, 2025
SCS-Tri-County Turkey Creek Site-29a, located in Greer County, Oklahoma, is a state-regulated dam designed by the USDA NRCS for flood risk reduction on Spring Branch.
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Summary
Completed in 1966, this earth dam stands at a height of 20 feet and has a hydraulic height of 16 feet. With a storage capacity of 186 acre-feet, this structure serves the primary purpose of flood risk reduction and has a spillway type of controlled with a width of 1 foot.
Despite being rated as having a low hazard potential, the dam's risk assessment is classified as very high, with emergency action plans not being prepared or meeting guidelines. The last inspection was conducted in 1988, with a frequency of every 5 years, and the condition assessment is marked as "Not Rated." The dam's associated structures include a valve outlet gate, and it is under the jurisdiction of the Oklahoma Water Resources Board for permitting, inspection, and enforcement.
For water resource and climate enthusiasts, SCS-Tri-County Turkey Creek Site-29a presents an intriguing case study of a vintage earth dam serving its community in rural Oklahoma. The blend of historical construction methods with modern regulatory standards adds complexity to its risk management and emergency preparedness aspects. As one of the many dams maintained by the Natural Resources Conservation Service, this site offers valuable insights into the ongoing challenges and opportunities in managing water resources in a changing climate landscape.
Year Completed |
1966 |
Dam Length |
2580 |
Dam Height |
20 |
River Or Stream |
SPRING BRANCH |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
16 |
Nid Storage |
186 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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-Tri-County Turkey Creek Site-29a