Forrest Hills Lake Dam Reservoir Report

Last Updated: December 6, 2025

Forrest Hills Lake Dam in Montgomery, Texas is a privately owned structure completed in 1965 with the primary purpose of recreation.


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Summary

The dam, standing at a height of 9 feet and a length of 4150 feet, holds a maximum storage capacity of 260 acre-feet and normal storage of 117 acre-feet. Situated on the TR-W Fork San Jacinto River, the dam is regulated and inspected by the Texas Commission on Environmental Quality (TCEQ) to ensure its safety and compliance with state standards.

Despite being classified as having a high risk potential, Forrest Hills Lake Dam has not been rated for its current condition. The dam lacks a spillway and drainage area, with no recorded maximum discharge capacity. While it poses a risk, there have been no reported incidents or related emergency action plans prepared for the site. With no designated outlet gates and a buttress core type, the dam remains a focal point for water resource and climate enthusiasts due to its historical significance and recreational value, despite its potential hazards.

As a vital structure in the Fort Worth District, Forrest Hills Lake Dam plays a crucial role in providing recreational opportunities and water storage in the region. Its presence on the TR-W Fork San Jacinto River adds to the natural beauty of the area while serving as a reminder of the importance of proper dam management and maintenance in safeguarding water resources and mitigating potential risks associated with high hazard structures.

Year Completed

1965

Dam Length

4150

Dam Height

9

River Or Stream

TR-W FORK SAN JACINTO RIVER

Primary Dam Type

Earth

Surface Area

43

Hydraulic Height

9

Nid Storage

260

Structural Height

9

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

9
       
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.