Lake Tankersley Dam Reservoir Report

Last Updated: December 5, 2025

Lake Tankersley Dam, located in Mount Pleasant, Texas, is a vital structure designed for flood risk reduction and water supply purposes.


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Summary

Constructed in 1957 by BUCHER WILLIS AND RATLIFF, HOMER A HUNTER, the dam stands at 36 feet high with a length of 1900 feet, holding a maximum storage capacity of 4100 acre-feet. The dam is primarily made of earth with stone core and soil foundation, overlooking Tankersley Creek.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), Lake Tankersley Dam has a fair condition assessment as of April 2021. With a moderate risk rating, the dam has undergone a structural modification in 1984. The uncontrolled spillway, with a width of 150 feet, allows for a maximum discharge of 15,378 cubic feet per second. Despite being non-USACE owned, the dam plays a crucial role in mitigating flood risks and ensuring water supply for the surrounding area, making it a significant asset for water resource and climate enthusiasts in the region.

Years Modified

1984 - Structural

Year Completed

1957

Dam Length

1900

Dam Height

36

River Or Stream

TANKERSLEY CREEK

Primary Dam Type

Earth

Surface Area

275

Hydraulic Height

36

Drainage Area

8.68

Nid Storage

4100

Structural Height

36

Outlet Gates

Uncontrolled - 1

Hazard Potential

Not Available

Foundations

Soil

Nid Height

36
       
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.