With the tunnel boring machine damaged and unable to advance for over 8 months, King County had to act. In March 2010, King County issued a declaration of emergency in order to expedite a change of contractor on the troubled Brightwater Tunnel, Section 3 contract. King County then directed the Jay Dee/Coluccio JV (JDC) team to continue tunneling an additional 9,900 ft. from the Section 4 contract and connect to the uncompleted Section 3 tunnel. In order to complete this objective the existing JDC TBM had to be reconfigured for the higher pressures expected, the damaged TBM had to be gutted and filled with concrete and a ground freezing system had to be installed at the tunnel interface. Finally, after 10 months of hard work the JDC TBM successfully mined into the stalled Section 3 tunnel. This extraordinary accomplishment earned the Jay Dee/Coluccio JV team the 2011 International Tunnelling Awards, Tunnelling Contractor of the Year award.
Tunnelling Contractor of the Year
NCE (New Civil Engineer)
International Tunnelling Awards 2011
Salvation in Seattle
Tunneling Journal Oct/Nov 2011
The Future is Brightwater
World Tunnelling March 2011