Not all goes fine at Scarborough subway extension tunnelling by Strabag;

At Metrolinx board meeting's public session on Thursday, Phil Verster said over the $757-million advance tunnel contract:  “We’ve encountered soil conditions different than expected that have hampered the progress of the tunnel-boring machine”

https://toronto.citynews.ca/2024/11/29/scarborough-subway-extension-tunneling-soil-conditions/