Project Overview

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Project Overview

The Mill Creek/Peaks Branch/State-Thomas (MCPBST) Drainage Relief Tunnel is a five-mile underground tunnel that will provide 100-year flood protection for nearly 2,200 commercial and residential properties in the east Dallas area. The current drainage system in these areas was constructed 50 to 70 years ago, and only provides a two to five year flood protection.

The MCPBST Drainage Relief Tunnel will improve stormwater management resulting in protection of schools, medical facilities, residents and streets. Construction began in spring 2018 and is slated for completion in 2025.

Once complete, the tunnel will be approximately 30 feet in diameter, and will be designed to carry a maximum flow of nine million gallons per minute. This provides exponential relief of flooding during large rain events. The tunnel will have six intake sites along the alignment. These include:

  • Woodall Rodgers Intake – Intersection of Woodall Rodgers Freeway and Maple-Routh Connection

  • Mill Creek Intake - Intersection of San Jacinto Street and Apple Street

  • Peaks Branch Intake – Intersection of North Carroll Avenue and Victor Street

  • Peaks Branch 2 Intake - Intersection of E R L Thornton Freeway (I-30) and South Hill Avenue

  • East Peaks Branch Intake - Intersection of Bank Street and Herndon Drive

  • Outfall - White Rock Creek at Barber Avenue