Scs-Tri-County Turkey Creek Site-12 Reservoir Report
Last Updated: December 21, 2025
SCS-Tri-County Turkey Creek Site-12, located in Harmon, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS with a primary purpose of flood risk reduction.
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Summary
Completed in 1966, this dam stands at a height of 33 feet and has a hydraulic height of 30 feet, providing a storage capacity of 129 acre-feet. With a spillway width of 1 foot and a controlled spillway type, the dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment.
This structure, built on TR-Turkey Creek under the jurisdiction of the OWRB, plays a vital role in managing water resources and mitigating flood risks in the area. Despite its age, the dam has a very high risk assessment rating (1) due to its critical importance in protecting the surrounding communities from potential disasters. With one valve as the outlet gate, this dam has not been inspected since June 1988, making regular inspections and maintenance crucial to ensure its continued functionality and safety for the local residents.
As water resource and climate enthusiasts, understanding the significance of structures like SCS-Tri-County Turkey Creek Site-12 is essential in safeguarding our environment and communities. By staying informed about the design, purpose, and condition of such dams, we can advocate for proper management and investment in water infrastructure to address the growing challenges posed by climate change and ensure sustainable water resource management for future generations.
Year Completed |
1966 |
Dam Length |
780 |
Dam Height |
33 |
River Or Stream |
TR-TURKEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
30 |
Nid Storage |
129 |
Structural Height |
33 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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-12