Scs-Tonkawa Creek Site-001a Reservoir Report
Last Updated: December 6, 2025
SCS-Tonkawa Creek Site-001a is a state-regulated dam located in Anadarko, Oklahoma, designed by the USDA NRCS with a primary purpose of flood risk reduction.
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Summary
Completed in 1968, this earth dam stands at 44 feet high with a hydraulic height of 40 feet and a length of 990 feet. It has a storage capacity of 333 acre-feet and a normal storage of 56 acre-feet, serving a surface area of 9 acres.
The dam features a controlled spillway with a width of 1 foot and an outlet gate consisting of a single valve. Despite being classified as having a significant hazard potential, the condition assessment of the dam is currently rated as fair. The last inspection was conducted in August 2011, with a recommended inspection frequency of every 3 years. With a very high risk assessment ranking of 1, this dam is crucial in managing flood risks in the area and warrants continued monitoring and maintenance to ensure its effectiveness in protecting the surrounding community from potential disasters.
Year Completed |
1968 |
Dam Length |
990 |
Dam Height |
44 |
River Or Stream |
TONKAWA CR |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
40 |
Nid Storage |
333 |
Structural Height |
44 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
44 |
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-Tonkawa Creek Site-001a
Scs Pond No. 26 Near Cyril