George Mcneff Jr Reservoir Report
Last Updated: December 6, 2025
George Mcneff Jr is a private earth dam located in Grady, Oklahoma, designed for flood risk reduction along Line Creek of the Washita River.
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Summary
With a height of 33 feet and a storage capacity of 52.3 acre-feet, this dam serves an important role in managing water resources and mitigating potential flooding in the area. The dam is regulated by the Oklahoma Water Resources Board and undergoes regular inspections to ensure its safety and effectiveness.
Despite its low hazard potential, George Mcneff Jr is considered to have a very high risk level due to its critical role in flood risk reduction. The dam features a controlled spillway and a single valve outlet gate for water release. While the condition assessment is currently not rated, the dam has a designated inspection frequency of every 5 years to monitor its performance and address any potential issues that may arise. Additionally, the dam does not have an Emergency Action Plan prepared, highlighting the need for continued risk management measures to be in place.
Located in the Tulsa District and under state jurisdiction in Oklahoma, George Mcneff Jr is an essential infrastructure for water resource management in the region. As a private dam, it plays a crucial role in protecting nearby communities from potential flooding events and demonstrates the importance of maintaining and monitoring water infrastructure for climate resilience. With its specific design features and regulatory oversight, George Mcneff Jr stands as a key asset in the ongoing efforts to safeguard water resources and address climate-related challenges in the area.
Dam Height |
33 |
River Or Stream |
LINE CREEK OF THE WASHITA RIVE |
Primary Dam Type |
Earth |
Hydraulic Height |
33 |
Drainage Area |
20 |
Nid Storage |
52.3 |
Structural Height |
33 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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.
George Mcneff Jr