Upper Lake Avery Dam Reservoir Report

Last Updated: December 25, 2025

Upper Lake Avery Dam, located in Trinity, Texas, stands as a testament to early 20th-century engineering, having been completed in 1910.


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Summary

This private earth dam, with a height of 15 feet and a length of 1000 feet, serves multiple purposes beyond just water storage. Situated on Kickapoo Creek, the dam's primary purpose is listed as "Other," indicating its versatility in water resource management.

Managed by the Texas Commission on Environmental Quality (TCEQ), the dam undergoes regular inspections and enforcement to ensure its structural integrity and compliance with state regulations. With a normal storage capacity of 305 acre-feet and a maximum storage of 690 acre-feet, Upper Lake Avery Dam plays a crucial role in water supply and flood control in the region. The spillway, measuring 250 feet in width, provides an uncontrolled release for excess water, further enhancing the dam's effectiveness in managing water levels.

Despite its age, Upper Lake Avery Dam is categorized as having a moderate risk level, with a hazard potential that is not available. The dam's condition assessment is labeled as "Not Rated," indicating a need for further evaluation. With a history dating back over a century, this dam serves as a vital piece of infrastructure in the region, highlighting the importance of continued monitoring and maintenance to ensure its long-term functionality and safety for both water resources and climate enthusiasts to appreciate.

Year Completed

1910

Dam Length

1000

Dam Height

15

River Or Stream

KICKAPOO CREEK

Primary Dam Type

Earth

Surface Area

69

Hydraulic Height

15

Nid Storage

690

Structural Height

15

Outlet Gates

Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

15
       
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.