Overton Russell Reservoir Report
Nearby: Gr Overton Sherrill Rufus No 1
Last Updated: January 2, 2026
Overton Russell is a privately owned dam located in Harmon, Oklahoma, near the city of Vinson.
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Summary
Built in 1963, this Earth-type dam stands at a height of 27 feet and has a hydraulic height of 25 feet. It serves as a flood control structure on TR-Grape Creek, with a capacity to store 50 acre-feet of water. Although it has a low hazard potential, it is classified as having a very high risk due to its condition assessment not being rated.
The dam features a controlled spillway, with a width of 1 foot, and an outlet gate consisting of a single valve. It is inspected every 5 years, with the last inspection conducted in November 2010. Despite being regulated by the Oklahoma Water Resources Board and meeting state permitting, inspection, and enforcement requirements, the dam's emergency action plan status and risk management measures are not specified. With a risk assessment of very high, stakeholders and authorities need to ensure that proper safety measures are in place to mitigate any potential risks associated with this structure.
Year Completed |
1963 |
Dam Length |
242 |
Dam Height |
27 |
River Or Stream |
TR-GRAPE CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
25 |
Nid Storage |
50 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
Overton Russell