Mexia Dam Reservoir Report

Last Updated: December 5, 2025

Mexia Dam, located in Jayell, Texas, is a vital water resource structure designed by FREESE AND NICHOLS AND ENDRESS.


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Summary

Completed in 1950, this earth-type dam stands at a height of 52 feet and has a length of 1660 feet, with a primary purpose of water supply for the area. It impounds Mexia Creek to provide a maximum storage capacity of 3370 acre-feet, with a normal storage level of 2070 acre-feet. The dam has an uncontrolled spillway with a width of 280 feet and three uncontrolled outlet gates.

Despite its importance, Mexia Dam is currently in poor condition, as assessed in April 2021. The last inspection in February 2013 highlighted structural modifications made in 1982. The dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular state inspections, permitting, and enforcement to ensure its safety and functionality. With a moderate risk assessment rating of 3, it is crucial for authorities to implement proper risk management measures to maintain the dam's integrity and prevent potential hazards. Mexia Dam serves as a critical infrastructure for water supply and climate enthusiasts to monitor and protect for the sustainable management of water resources in the region.

Years Modified

1982 - Structural

Year Completed

1950

Dam Length

1660

Dam Height

52

River Or Stream

MEXIA CREEK

Primary Dam Type

Earth

Hydraulic Height

52

Nid Storage

3370

Structural Height

52

Outlet Gates

Uncontrolled - 3

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

52
       
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.