Caldecott 4th BorePaula Wallis reports for TunnelTalk
February 2009: Project Advertisement
Summer 2009: Construction Begins
Winter 2013-2014: Completion of Construction
June, 2008 TunnelCast spoke with Bijan Sartipi, Director of District 4 for Caltrans at the North American Tunneling (NAT) Conference in San Francisco about the Caldecott 4th bore and other major tunneling projects for the transportation department.
In several projects around the country it appears the Geotechnical Reports have fallen far short of providing a clear or accurate picture of expected ground conditions. While ground conditions around Caldecott are fairly well documented, what is your program for site investigation?
While 14 prime contractors took out plans, Caltrans received only two bids on the Devil's Slide tunnel contract, some in the department expressed disappointment, what do you account for the low number of bids and how do you increase competition for Caldecott?
Going back to Devil's Slide for a moment. Kiewit has fallen behind its ambitious construction schedule. While its $272.4 million bid was $32 million more than Caltrans' estimate, it planned to bring the job in a year early by cutting 400 workdays off the engineer's estimate of 1,900 days. How are they planning to make up lost time?