Stonebridge Lake C Dam Reservoir Report

Last Updated: December 5, 2025

Stonebridge Lake C Dam, located in McKinney, Texas, is a privately owned structure designed by Huitt-Zollars Inc.


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Summary

The dam was completed in 1998 and stands at a height of 22 feet, serving primarily for flood risk reduction along TR-Wilson Creek. In addition to flood control, the dam also supports irrigation and recreation purposes, with a normal storage capacity of 11 acre-feet and a surface area of 2.5 acres.

With a structural assessment rating of 'Fair' as of September 2017, the dam is deemed to be in decent condition. The spillway, classified as 'Uncontrolled' with a width of 131 feet, can handle a maximum discharge of 88 cubic feet per second. Despite being privately owned, the dam falls under the regulatory oversight of the Texas Commission on Environmental Quality (TCEQ), ensuring regular inspections and enforcement of safety measures.

Overall, Stonebridge Lake C Dam plays a crucial role in mitigating flood risks in the Collin County area, showcasing the importance of private infrastructure in water resource management. The dam's moderate hazard potential, coupled with its strategic location and design features, highlights its significance in safeguarding the surrounding communities from potential water-related emergencies.

Years Modified

1998 - Structural

Year Completed

1998

Dam Length

585

Dam Height

22

River Or Stream

TR-WILSON CREEK

Primary Dam Type

Earth

Surface Area

2.5

Hydraulic Height

22

Drainage Area

0.08

Nid Storage

20

Structural Height

22

Outlet Gates

Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Soil

Nid Height

22
       
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.