VINCI Chester new drain TBM being lowered to the shaft. photograph from VINCI media release

GDDKiA Tunel Świnoujście 130m progress Photograph GDDKiA press announcement

GDDKiA Tunel Świnoujście 130m progress Photograph of GDDKiA press announcement

GDDKiA Tunel Świnoujście 130m progress Photograph of GDDKiA press announcement

Bangkok Metro Orange Line Breakthrough picture from Terratec press release

Rogvast - Statens vegvesen

Thames Tideway Blackfriars shaft time capsule  photo by Laing O’Rourke pr

Thames Tideway Blackfriars shaft photo by Laing O’Rourke pr

Singapore LTA Cross Island P1 Hougang Station and Tunnel Location - source LTA

CSC graphics