Lake Simonds Dam Reservoir Report

Last Updated: December 5, 2025

Lake Simonds Dam, located in Dallas, Texas, is a vital water resource serving the community for recreation and water supply purposes.


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Summary

Completed in 1962, this earthen dam stands at 23 feet high with a length of 1000 feet, offering a storage capacity of 456 acre-feet and a surface area of 25 acres. The dam regulates the flow of the Hickory Creek, with a maximum discharge capacity of 3936 cubic feet per second and an uncontrolled spillway width of 70 feet.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), Lake Simonds Dam has undergone regular inspections, with the last assessment conducted in October 2015. While its hazard potential and condition assessment remain unspecified, the dam's risk assessment is moderate, emphasizing the importance of ongoing monitoring and maintenance. With a focus on safety and sustainability, Lake Simonds Dam plays a crucial role in water management and climate resilience in the region, supported by its strategic location and design features.

Year Completed

1962

Dam Length

1000

Dam Height

23

River Or Stream

TR-HICKORY CREEK

Primary Dam Type

Earth

Surface Area

25

Hydraulic Height

23

Nid Storage

456

Structural Height

23

Outlet Gates

Uncontrolled - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

23
       
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.