Comanche Harbor Lake Dam Reservoir Report

Last Updated: December 5, 2025

Comanche Harbor Lake Dam, located in Granbury, Texas, is a privately-owned structure with a primary purpose of recreation.


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Summary

Completed in 1975, this earth dam stands at a height of 37 feet and stretches 460 feet in length, creating a reservoir with a maximum storage capacity of 74 acre-feet. The dam is situated on the TR-Brazos River and is regulated by the Texas Commission on Environmental Quality (TCEQ), with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.

With an uncontrolled spillway and one outlet gate, Comanche Harbor Lake Dam has a moderate hazard potential and is rated as not available in terms of condition assessment. The emergency action plan was last revised in July 2012, and while no inundation maps have been prepared, the dam's risk assessment is categorized as moderate. The Fort Worth District of the US Army Corps of Engineers does not have jurisdiction over this dam, highlighting its status as a privately-owned and regulated structure within the state of Texas. For water resource and climate enthusiasts, Comanche Harbor Lake Dam serves as an intriguing example of a recreational earth dam blending into the natural landscape of Hood County.

Year Completed

1975

Dam Length

460

Dam Height

37

River Or Stream

TR-BRAZOS RIVER

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

37

Drainage Area

0.1

Nid Storage

74

Structural Height

37

Outlet Gates

Uncontrolled - 1

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

37
       
Seasonal Comparison

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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.