Scs-Tonkawa Creek Site-101 Reservoir Report
Last Updated: December 6, 2025
SCS-Tonkawa Creek Site-101, located in Anadarko, Oklahoma, is a state-owned earth dam built in 1969 by the USDA NRCS with a primary purpose of flood risk reduction along the TR-Tonkawa Creek.
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Summary
The dam stands at a height of 30 feet and has a hydraulic height of 28 feet, providing a maximum storage capacity of 50 acre-feet and a normal storage capacity of 25 acre-feet. Despite its low hazard potential, the dam has a very high risk assessment rating of 1, indicating the need for careful monitoring and maintenance.
Owned and regulated by the Oklahoma Water Resources Board (OWRB), SCS-Tonkawa Creek Site-101 has not undergone a condition assessment and is currently not rated. The dam is inspected every 5 years, with the last inspection dating back to 1980. While it has a controlled spillway and one outlet gate, the dam's risk management measures, emergency action plan, and inundation maps are not currently prepared or up to date. With its stone core foundation and valve outlet structure, this dam serves as a crucial defense against flooding in the Caddo County region.
Overall, SCS-Tonkawa Creek Site-101 plays a vital role in mitigating flood risks in the area and protecting nearby communities from potential inundation. As water resource and climate enthusiasts, it is important to advocate for regular inspections, maintenance, and updates to ensure the dam's continued effectiveness in safeguarding against high water events and potential emergencies.
Year Completed |
1969 |
Dam Length |
670 |
Dam Height |
30 |
River Or Stream |
TR-TONKAWA CR |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
28 |
Nid Storage |
50 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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-101
Scs Pond No. 26 Near Cyril