Lk Conroe Nr Conroe Reservoir Report

Last Updated: December 5, 2025

Lake Conroe is a reservoir located in Montgomery County, Texas, near Conroe.


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Summary

The lake was created in 1973 by the construction of a dam on the West Fork of the San Jacinto River. It covers a surface area of 21,000 acres and has a maximum depth of 75 feet. The lake is a major source of water for the city of Houston and surrounding areas. It also serves as a popular recreational destination, offering fishing, boating, and swimming opportunities. The lake is fed by several creeks and streams, including the Caney Creek, Peach Creek, and the East and West Forks of the San Jacinto River. The lake is also surrounded by agricultural land used for cattle ranching and farming. The snowpack in the area is not significant, as the climate in the region is subtropical.

Reservoir Details

24hr Change 0.4%
Percent of Normal 103%
Minimum 273,300.0
2022-12-23
Maximum 518,300.0
2017-08-28
Average 390,400
Dam_Height 82
Hydraulic_Height 82
Drainage_Area 444
Years_Modified 2001 - Hydraulic, 2001 - Structural, 2006 - Other, 2009 - Other
Year_Completed 1973
Nid_Storage 706970
Structural_Height 82
River_Or_Stream WEST FORK SAN JACINTO RIVER
Foundations Soil
Surface_Area 20118
Hazard_Potential Not Available
Outlet_Gates Other Controlled - 1, Slide (sluice gate) - 3
Dam_Length 11800
Primary_Dam_Type Earth
Nid_Height 82
       
Seasonal Comparison
Reservoir Storage, Acre-Ft Levels

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.