Dam 42 Reservoir Report

Last Updated: December 5, 2025

Dam 42, also known as Landfill Lake, is a federal-owned earth dam located in Killeen, Texas.


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Summary

Managed by the US Army, this dam stands at a height of 50 feet and has a length of 1000 feet, providing a storage capacity of 762 acre-feet. With a significant hazard potential and a moderate risk assessment rating, Dam 42 plays a crucial role in water resource management in the Coryell County area.

Constructed with a buttress core and built on rock and soil foundations, Dam 42 features an uncontrolled spillway with a width of 87 feet. Despite not being state regulated, the dam undergoes inspections every four years to ensure its structural integrity. The last inspection conducted in September 2020 revealed that the condition assessment was not available, highlighting the importance of ongoing monitoring and maintenance to mitigate potential risks associated with the dam.

Water resource and climate enthusiasts interested in the management and maintenance of critical infrastructure like dams will find Dam 42 to be a fascinating case study. With its federal ownership and operation by the US Army, this earth dam serves as a vital component of the local water supply system, emphasizing the importance of effective risk management and emergency preparedness in safeguarding communities against potential hazards.

Dam Length

1000

Dam Height

50

Primary Dam Type

Earth

Surface Area

9

Drainage Area

1

Nid Storage

762

Hazard Potential

Significant

Foundations

Rock, Soil

Nid Height

50
       
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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.