Ronald Sewell Reservoir Report
Last Updated: December 6, 2025
Located in Custer, Oklahoma, Ronald Sewell is a privately owned Earth dam on Turkey Creek that serves multiple purposes, including providing water storage.
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Summary
Constructed in 1982 by NRCS, this dam has a storage capacity of 55.5 acre-feet, with a normal storage level of 32.5 acre-feet. With a low hazard potential and a very high risk assessment rating, Ronald Sewell is regulated by the Oklahoma Water Resources Board and undergoes regular inspections to ensure its structural integrity.
Despite its age, Ronald Sewell has not been rated for its condition assessment, and its emergency action plan status remains unknown. With only one valve outlet gate, this dam is equipped with a controlled spillway and is located within the Tulsa District of the US Army Corps of Engineers jurisdiction. The dam's risk management measures and inundation maps status are also unclear, highlighting the importance of ongoing monitoring and maintenance to safeguard this crucial water resource in the region.
Year Completed |
1982 |
Dam Height |
23.7 |
River Or Stream |
TURKEY CREEK |
Primary Dam Type |
Earth |
Drainage Area |
0.59 |
Nid Storage |
55.5 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Nid Height |
24 |
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.
Ronald Sewell
Foss Reservoir Near Foss