Mabank City Lake Dam Reservoir Report

Last Updated: December 5, 2025

Mabank City Lake Dam, located in Henderson County, Texas, is a private-owned structure completed in 1926 with the primary purpose of water supply.


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Summary

Standing at a height of 24 feet with a length of 1011 feet, this earth dam with a buttress core type holds a storage capacity of 265 acre-feet. The dam overlooks the TR-North Twin Creek and features an uncontrolled spillway with a width of 40 feet.

Despite its age, the dam's condition assessment is marked as "Not Rated" with a moderate risk level. The last inspection conducted on the dam dates back to August 1983, raising concerns about its current safety and structural integrity. With no state jurisdiction or regulatory agency overseeing its maintenance, the dam poses a potential hazard that requires further assessment and risk management measures to ensure the safety of the surrounding area and water resources.

Year Completed

1926

Dam Length

1011

Dam Height

24

River Or Stream

TR-NORTH TWIN CREEK

Primary Dam Type

Earth

Hydraulic Height

24

Nid Storage

265

Structural Height

24

Outlet Gates

Uncontrolled - 1

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

24
       
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.