Lake Galahad Dam Reservoir Report

Last Updated: December 5, 2025

Lake Galahad Dam, located in Hillister, Texas, is a captivating recreational spot nestled beside the Magnolia Branch river.


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Summary

Built in 1958, this Earth-type dam stands at a height of 11 feet with a length of 900 feet, creating a reservoir with a maximum storage capacity of 730 acre-feet. The dam's primary purpose is for recreation, offering visitors a serene escape with a surface area of 85 acres for boating, fishing, and wildlife observation.

Managed by the local government and regulated by the Texas Commission on Environmental Quality, Lake Galahad Dam has undergone structural modifications in 2004 and 2009 to ensure its safety and functionality. The dam features an uncontrolled spillway and outlet gates for water release, with a moderate risk assessment level. With a fair condition assessment as of June 2018, Lake Galahad Dam continues to be a popular destination for water resource and climate enthusiasts, providing both relaxation and opportunities to appreciate the natural beauty of the area.

As a significant part of the Tyler County landscape, Lake Galahad Dam serves as a vital water resource for the community while also enhancing the local ecosystem. With its rich history, structural integrity, and recreational offerings, this dam is a must-visit destination for those passionate about water conservation, climate resilience, and outdoor enjoyment in the heart of Texas.

Years Modified

2004 - Structural, 2009 - Structural

Year Completed

1958

Dam Length

900

Dam Height

11

River Or Stream

MAGNUS BRANCH

Primary Dam Type

Earth

Surface Area

85

Hydraulic Height

11

Drainage Area

10.47

Nid Storage

730

Structural Height

11

Outlet Gates

Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

11
       
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.