The City of Dallas has a comprehensive approach to floodplain and drainage management that dates back to the early 1970s. The Mill Creek/Peaks Branch/State-Thomas Drainage Relief project is one part of a plan to provide storm drainage improvements to the Mill Creek, Peaks Branch, East Peaks Branch and State Thomas areas of Dallas. The City of Dallas is the owner of this project.

The Southland Mole Joint Venture (SMJV) is comprised of Southland Contracting and Mole Constructors, as part of the Southland Holdings, LLC family of companies based in the Dallas-Fort Worth Metroplex. Southland Contracting and Mole Contractors have combined experience totaling more than 80 years, and both companies are pioneers in the tunneling industry. Their award-winning experience in tunneling excellence and safety has made them one of the most sought-after tunneling contractors in North America.

Black & Veatch is the construction manager for the drainage relief tunnel. The company has worked on the project since early 2016, during the pre-construction phase. Black & Veatch is a leading engineering, consulting and construction company that was founded in 1915. In its 107-year history, Black & Veatch has helped to improve the lives of people in more than 100 countries.

Halff is the designer of the project. Halff has been providing smart solutions in engineering, architecture, science, planning and surveying for more than 70 years. Headquartered in Richardson, TX, Halff brings a unique and deep knowledge of our region.