Mccarley Reservoir Report

Last Updated: December 5, 2025

McCarley is a privately owned earth dam located in HENDRIX, Bryan County, Oklahoma, with a primary purpose of irrigation.


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Summary

Completed in 1967, the dam stands at a height of 21 feet and has a maximum storage capacity of 98 acre-feet. The dam spans 682 feet in length and has a controlled spillway with a width of 1 foot. Despite being rated as low hazard potential, the risk assessment for McCarley indicates a very high risk, prompting the need for stringent risk management measures.

Managed by the Oklahoma Water Resources Board, McCarley is subject to state regulation, permitting, inspection, and enforcement. The dam is situated on the TR-EASTMAN CR river/stream and falls under the jurisdiction of the Fort Worth District of the US Army Corps of Engineers. Although the dam has not been modified in recent years and is currently in a not-rated condition, it is essential to ensure regular inspections, as mandated by the state, to maintain its structural integrity and reduce the risk of potential hazards.

With a single valve outlet gate, McCarley has not been associated with any other structures. The last inspection of the dam was conducted in December 2010, with an inspection frequency of 5 years. Although the Emergency Action Plan (EAP) status is unknown, it is crucial for the owners to ensure that the EAP meets guidelines and is regularly updated, especially given the very high risk assessment associated with the dam. Overall, McCarley serves as a vital irrigation resource in the region, emphasizing the importance of proper maintenance and risk management to safeguard water resources and mitigate potential climate-related impacts.

Year Completed

1967

Dam Length

682

Dam Height

21

River Or Stream

TR-EASTMAN CR

Primary Dam Type

Earth

Hydraulic Height

17

Nid Storage

98

Structural Height

21

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

21
       
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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.