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Dr. Gall Presented at Breakthroughs in Tunneling 2012

September 21, 2012, Dr. Vojtech Gall presented “Case History: Tysons Corner Station and Tunnels”, at Breakthroughs in Tunneling 2012, on

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Excavation for Caldecott Tunnel’s Fourth Bore Almost Complete

August 3, 2012 – The dig to begin the Caldecott Tunnel’s fourth bore will soon be complete outlining the giant

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Dr. Gall Presented at the 2012 NAT

Vojtech Gall, Ph.D., P.E., presented at the 2012 North American Tunneling Conference on “Real-Time Monitoring for Very Shallow Tunneling in

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Principal Kurt Zeidler, PhD, CEng Presents at the WTC 2012

GZ Principal Kurt Zeidler, PhD, CEng gave a presentation at the World Tunnel Congress May 18-23, 2012 in Bangkok, Thailand. A

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Keynote Speaker, Vojtech Gall, Ph.D., P.E., Presents at AquaStop 2012

Dr. Gall presented “The Latest Strategy of Dry Tunnel Development” at AquaStop 2012.  The international conference was held May 29-30,

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GZ Finalist at International Tunnelling Awards

Hong Kong, December 1, 2011 – GZ has been elected Finalist in the “International Tunnelling Project of the Year 2011”

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Official Caldecott News

For the latest construction progress and other information regarding the Caldecott Fourth Bore Project, visit the official website:

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Breakthrough of the Caldecott Tunnel’s Fourth Bore Marks a Major Project Milestone

Oakland, California, November 29, 2011 – the tunnel “breakthrough” occurred on November 29, 2011 at 2:37pm, when the tunnel’s eastern

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