Greenbriar Management Co. Lake Dam Reservoir Report

Last Updated: December 11, 2025

Greenbriar Management Co.


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Summary

Lake Dam, located in Moore, Oklahoma, is a privately owned structure designed for flood risk reduction on a tributary to the Canadian River. Completed in 1970, this earth dam stands at a height of 24 feet and has a length of 1270 feet, providing a maximum storage capacity of 400 acre-feet. With a controlled spillway and one outlet valve, the dam has a very high risk assessment rating due to its potential hazard, although its condition assessment is currently not rated.

Managed by the Oklahoma Water Resources Board, the Greenbriar Management Co. Lake Dam undergoes state regulation, permitting, inspection, and enforcement to ensure its structural integrity and functionality. Despite being a privately owned dam, it plays a crucial role in mitigating flood risks in the area and protecting downstream communities. The dam's undetermined hazard potential highlights the importance of continuous monitoring and maintenance to prevent any potential disasters.

With a risk management plan still undetermined and emergency preparedness measures not fully in place, the Greenbriar Management Co. Lake Dam serves as a vital flood control structure in Cleveland County, Oklahoma. As climate change continues to impact water resources and weather patterns, the importance of maintaining and upgrading such infrastructure to meet evolving challenges becomes increasingly apparent. The dam's strategic location and design play a key role in protecting the surrounding area from floods and ensuring the safety of the community.

Year Completed

1970

Dam Length

1270

Dam Height

24

River Or Stream

TRIBUTARY TO CANADIAN RIVER

Primary Dam Type

Earth

Surface Area

37

Hydraulic Height

24

Nid Storage

400

Structural Height

24

Outlet Gates

Valve - 1

Hazard Potential

Undetermined

Foundations

Soil

Nid Height

24
       
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.