Mccarley Lake Reservoir Report

Last Updated: December 5, 2025

McCarley Lake in Bryan County, Oklahoma is a privately owned reservoir primarily used for irrigation purposes.


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Summary

The earth dam, constructed in 1969, stands at a height of 25 feet and has a hydraulic height of 23 feet. With a storage capacity of 84 acre-feet, the lake's normal storage level is 60 acre-feet, covering a surface area of 1 acre. Its spillway, controlled in type, has a width of 1 foot and a maximum discharge of 438 cubic feet per second.

Managed by the Oklahoma Water Resources Board, McCarley Lake is inspected every 5 years for safety and hazard potential, with a low risk assessment rating. Despite being classified as "Very High (1)" in terms of risk management, the dam's condition has not been rated recently. The emergency action plan status and compliance with guidelines remain unclear, indicating a need for updated safety protocols. For water resource and climate enthusiasts, the unique features and regulatory oversight of McCarley Lake make it an intriguing case study in dam infrastructure and water management in Oklahoma.

Year Completed

1969

Dam Length

1125

Dam Height

25

River Or Stream

TR-EASTMAN CR

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

23

Nid Storage

84

Structural Height

25

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.