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VANCOUVER — The City of Vancouver is piloting new ways to replace aging sewer infrastructure that runs underneath Memorial West Park.

Rather than open a large trench, crews are using a “trenchless” method by using a micro-tunnel boring machine, explains a release. This means most of the work happens underground, which helps keep the park open, preserves 24 mature trees, reduces the impact on residents and shortens the construction period,  the city states.

In October, crews used a specialized remote controlled micro-tunnel boring machine to install a concrete storm sewer main between W 31st Avenue and W 33rd Avenue directly underneath the park’s main footpath.

Once the machine completed the tunnel, which spanned the full length of the park from north to south, crews used a second trenchless method to insert a smaller pipe fixed in place with grout inside the existing combined sewer main, the release describes.  

Sliplining, as it is called, extends the life of the aging pipe without requiring extensive excavation.    

In 2026, crews will complete sliplining work, connect the new pipes to water and sewer systems and install new maintenance holes.

During this time, the playground and pedestrian pathway through Memorial West Park will need to close for approximately three to four weeks to allow the work to be completed safely. Construction is anticipated to be completed by spring 2026. 

�ճ���� are valued at $10.6 million and are part of ongoing work to replace aging combined sewer infrastructure in the Dunbar-Southlands neighbourhood.