Another breakthrough on the Broadway Subway’s tunnel boring has been achieved, with the tunnel boring machine named Elsie arriving at the underground pit of the future Broadway-City Hall Station for SkyTrain Millennium Line.

Elsie broke through the east wall of the pit for Broadway-City Hall Station at Alberta Street on Friday afternoon — a feat achieved in 41 days, after she resumed digging on March 4 from the west wall of the pit for Mount Pleasant Station at Quebec Street, which represents a distance of four city blocks or about 1.3 km.

Between Mount Pleasant Station and Broadway-City Hall Station, over 900 tunnel liner rings were installed by Elsie.

Elsie is one of two tunnel boring machines for the project, and she is specifically responsible for building the eastbound tunnel. She first began boring from the pit for Great Northern Way-Emily Carr Station on October 7, and arrived at Mount Pleasant Station’s pit on January 22.

Keep reading on dailyhive.com