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 storm water management resulting in protection of schools, medical facilities, residents, and streets. Construction began in spring 2018.
Overview Video
Watch the project video and hear from the team.
The MCPBST Drainage Relief Tunnel will improve stormwater management resulting in protection of schools, medical facilities, residents, and streets. Construction began in spring 2018.
Once complete, the tunnel will be approximately 30 feet in diameter for three miles and 35 feet in diameter for 2 miles, and will be designed to carry a maximum flow of nine million gallons per minute. This provides exponential relief from flooding during large rain events. The tunnel will have six intake sites along the alignment.