Conroe Dam Reservoir Report

Last Updated: December 29, 2025

Conroe Dam, located in Montgomery, Texas, stands as a vital structure for water resource management in the region.


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Summary

Completed in 1973, this earth dam spans 11,800 feet across the West Fork San Jacinto River, providing irrigation and water supply to the area. With a maximum storage capacity of 706,970 acre-feet and a normal storage capacity of 416,228 acre-feet, Conroe Dam plays a crucial role in ensuring water availability for agricultural and municipal needs.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), Conroe Dam has undergone multiple modifications over the years to enhance its hydraulic and structural integrity. The dam boasts a controlled spillway with a width of 200 feet and outlet gates for controlled water release. Despite its age, Conroe Dam has been assessed as satisfactory in terms of condition, with regular inspections and a risk assessment rating of very high, signifying the importance of ongoing maintenance and risk management measures.

As a key component of the water infrastructure in the area, Conroe Dam serves as a testament to the collaboration between engineering expertise and environmental stewardship. With its strategic location and function, the dam continues to be a critical asset in managing water resources, mitigating flood risks, and ensuring sustainable water supply for the community.

Years Modified

2001 - Hydraulic, 2001 - Structural, 2006 - Other, 2009 - Other

Year Completed

1973

Dam Length

11800

Dam Height

82

River Or Stream

WEST FORK SAN JACINTO RIVER

Primary Dam Type

Earth

Surface Area

20118

Hydraulic Height

82

Drainage Area

444

Nid Storage

706970

Structural Height

82

Outlet Gates

Other Controlled - 1, Slide (sluice gate) - 3

Hazard Potential

Not Available

Foundations

Soil

Nid Height

82
       
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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.