Box Lake Dam Reservoir Report

Last Updated: December 5, 2025

Located in Collin, Texas, the Box Lake Dam serves multiple purposes including fire protection, stock, and providing a small fish pond.


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Summary

Completed in 1967, this earth dam stands at a height of 18 feet and spans a length of 940 feet. With a maximum storage capacity of 72 acre-feet and a normal storage capacity of 46 acre-feet, the dam plays a crucial role in managing water resources in the area.

The dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and is regularly inspected, enforced, and permitted by the state agency. Despite not having a spillway, the dam has a single outlet gate for water release. The risk assessment for the Box Lake Dam has been rated as high, highlighting the importance of effective risk management measures and emergency preparedness.

Water resource and climate enthusiasts will be intrigued by the Box Lake Dam's role in providing essential services while also facing potential risks. Its location on the Cottonwood Branch river, under the jurisdiction of the Fort Worth District, showcases the intersection of human infrastructure with natural ecosystems. As discussions around water management and climate resilience continue, the Box Lake Dam serves as a case study for balancing multiple uses of water resources while ensuring safety and sustainability.

Year Completed

1967

Dam Length

940

Dam Height

18

River Or Stream

COTTONWOOD BRANCH

Primary Dam Type

Earth

Hydraulic Height

18

Nid Storage

72

Structural Height

18

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

18
       
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.