Big Mouth Bass Reservoir Report

Last Updated: December 9, 2025

Big Mouth Bass, located in Okfuskee, Oklahoma, is a private lake primarily used for recreation.


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Summary

Constructed in 1950 with an earth dam type, it has a height of 35 feet and a storage capacity of 610 acre-feet. The dam is regulated by the Oklahoma Water Resources Board and is inspected regularly to ensure its safety and compliance with state regulations.

The lake is situated near TR-Little Walnut Creek and covers a surface area of approximately 425 feet. It has a controlled spillway with a width of 2 feet and a low hazard potential. Despite being in operation for several decades, the condition of the dam is currently rated as "Not Rated", indicating a need for further assessment and potential risk management measures to address any safety concerns.

For water resource and climate enthusiasts, Big Mouth Bass presents an opportunity to explore the intersection of human infrastructure and natural ecosystems. With its unique design and location, this dam serves as a focal point for understanding the importance of proper regulation and maintenance in preserving water resources for future generations.

Year Completed

1950

Dam Length

425

Dam Height

35

River Or Stream

TR-LITTLE WALNUT CREEK

Primary Dam Type

Earth

Hydraulic Height

35

Nid Storage

610

Structural Height

35

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

35
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.