2013 Issues

March 2013

Building a TBM launch box

Tunneling in Charleston

June 2013

DC Clean Rivers project

History of US tunneling
Seattle’s SR99 tunnel
RETC in Washington, DC

September 2013

Large diameter tunneling in Seattle

Ground freezing challenges
Efficiency and safety in cross passage work

December 2013

Colorado’s Twin Tunnels project

Small footprint – big challenges
Megaprojects around the world

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