Tower ad (left) Oct-nov FY21
Tower ad (right) oct-nov FY21

Sewer upgrade completes tunnelling

City West Water’s Lonsdale Street Sewer Upgrade has reached a major milestone as tunnel boring ends.

The project has now completed 900 m of tunnel boring under Lonsdale Street, between Elizabeth Street and Spencer Street, with works undertaken by contractor Rob Carr.

The $21 million upgrade saw a 6.3 m, 16.3 t tunnel boring machine (TBM) used to make way for the new 1.5 m diameter sewer pipe.

First launched from William Street to Elizabeth Street, the TBM then returned to the William Street shaft to complete its final 350 m journey towards Spencer Street.

City West Water said the project is the “biggest upgrade to Melbourne CBD’s sewer network in more than 120 years”.

“The Lonsdale Street Sewer Upgrade works form part of City West Water’s four-stage $80 million capital improvement program to provide vital services for city residents, visitors and workers,” said General Manager of Infrastructure and Delivery Amanda Smith.

“The new sewer will add capacity to the existing sewer catchment, which was constructed in the 1890s and was nearing capacity.

“We are pleased to reach this milestone which will help deliver reliable, efficient, safe and environmentally responsible sewerage services for the community.”

The project is expected to be completed by the end of the year and will link with the Spencer Street Sewer Upgrade, completed in December 2019.

Stage 3 of the upgrade will include a new sewer along Elizabeth Street, with construction works to begin in 2021.

For more information visit the City West Water website.

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