Scs-Tonkawa Creek Site-002 Reservoir Report
Last Updated: December 6, 2025
SCS-Tonkawa Creek Site-002, located in Anadarko, Oklahoma, is a state-regulated earth dam designed by USDA NRCS in 1970 for flood risk reduction along the Tonkawa Creek.
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Summary
With a height of 30 feet and a hydraulic height of 25 feet, this dam serves the purpose of flood risk reduction with a normal storage capacity of 79 acre-feet and a maximum storage of 512 acre-feet. The dam, constructed with stone core and soil foundation, spans a length of 1270 feet and has a controlled spillway width of 1 foot.
The dam is under the jurisdiction of the Oklahoma Water Resources Board (OWRB) and is subject to state permitting, inspection, and enforcement. The inspection frequency is every 3 years, with the last inspection conducted in August 2011, revealing a fair condition assessment. The hazard potential is deemed significant, with a very high risk assessment ranking. The dam's emergency action plan (EAP) status, including preparation and adherence to guidelines, remains unspecified, highlighting the need for updated emergency contacts and risk management measures.
Overall, the SCS-Tonkawa Creek Site-002 serves as a vital infrastructure for flood risk reduction in Caddo County, Oklahoma, under the supervision of state regulatory agencies. With a focus on maintaining the dam's structural integrity and ensuring efficient emergency response protocols, this site plays a crucial role in mitigating potential risks and safeguarding the surrounding communities from flooding events along the Tonkawa Creek.
Year Completed |
1970 |
Dam Length |
1270 |
Dam Height |
30 |
River Or Stream |
TR-TONKAWA CR |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
25 |
Nid Storage |
512 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
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-002
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