New construction

In addition to removing excess rain water from the sewer system and repairing and maintaining the existing system, new construction is necessary to meet the wastewater needs of MSD’s service area. Project types are chosen based upon the topography, watershed, and wastewater needs of different areas of the service area, and may include new sewer lines to convey additional wastewater, above-ground storage tanks to store, or deep underground tunnels to both store and convey additional wastewater in times of high service demand.

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Tunnels

Tunnels are an important part of MSD Project Clear’s efforts to handle the wastewater needs of MSD’s service area by reducing pollution to our waterways and improving the water quality in our communities and neighborhoods.

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Chelsea the Chomper

Chelsea the Chomper is a Tunnel Boring Machine, or TBM. Beginning in mid-February 2014, Chelsea will begin her journey beneath Saint Louis to dig the Lemay Redundant Force Main, which will allow the Lemay Wastewater Treatment Plant to accept a higher volume of wastewater, and allow MSD to inspect the original Force Main for the first time since its construction in the 1960s. Chelsea will dig through March until the beginning of April, travelling 3,028 feet through primarily limestone.

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