Waterway Protection Tunnel

A new solution to an environmental challenge

More than 5 billion gallons of rainwater and wastewater overflow into our waterways each year.  MSD’s Waterway Protection Tunnel is an innovative way to store some of this overflow of rainwater and wastewater underground until it can be pumped to a treatment facility.

The tunnel is a $200 million project now underway and planned to be complete by the end of 2020. It is one part of MSD’s $900 million Consent Decree that will reduce sewer overflows by 98 percent — in a typical rainfall year — by 2024.




Waterway Protection Tunnel at a glance:


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