Hundvåg tunnel (Photo:Statens vegvesen)

BFK Danube Tunnel  (BFK)

Oslo's E6 Rentvannstunnel Project (water tunnel project) Norway City of Oslo drawing.

Sydney Metro West (taken from Sydney Metro - Western Sydney Airport Sustainable Report and modified with extra info) Sydney Metro - Western Sydney Airport Sustainable Report:...

Tunnel Québec-Lévis diameter (drawing from Le Réseau express de la Capitale (REC))

Tunnel Québec-Lévis profile (drawing from Le Réseau express de la Capitale (REC))

Metrolinx Toronto Yonge North Subway Extension (Metrolinx)

Metrolinks Toronto Scarborough metro extension (map Metrolinx)

photo is from NCC media release.

NCC and subcontractors gathered on the pile after the breakthrough, which was triggered at 13.15 local time photo is from NCC media release.