Lake Dunlap Dam Reservoir Report

Last Updated: December 5, 2025

Lake Dunlap Dam, located in McQueeney, Texas, is a state-regulated structure managed by the Texas Commission on Environmental Quality (TCEQ).


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Summary

Built in 1928 by Fargo Engineering Co, this earth dam stands at a height of 41 feet and spans 1800 feet along the Guadalupe River. With a primary purpose of hydroelectric power generation, the dam also serves recreational activities on its 410-acre surface area.

The dam has a storage capacity of 14,330 acre-feet, with normal storage at 5,900 acre-feet. The spillway width of 779 feet helps manage a maximum discharge of 2 cubic feet per second. Despite its fair condition assessment as of April 2021, the dam has a robust inspection frequency of every 5 years. The dam's emergency action plan was last revised in 2010, ensuring preparedness for any unforeseen events.

Lake Dunlap Dam presents an intriguing intersection of water resource management and hydroelectric power generation. As a vital structure along the Guadalupe River, it not only contributes to the region's water supply but also offers opportunities for recreational activities. The dam's historical significance, along with its functional aspects and regulatory oversight, make it a compelling site for water resource and climate enthusiasts to explore and study.

Year Completed

1928

Dam Length

1800

Dam Height

41

River Or Stream

GUADALUPE RIVER

Primary Dam Type

Earth

Surface Area

410

Hydraulic Height

41

Drainage Area

1676

Nid Storage

14330

Structural Height

41

Outlet Gates

Other Controlled - 1, Uncontrolled - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

41
       
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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.