Month: October 2010

Devil's Slide celebrates breakthrough

Devil's Slide celebrates breakthrough

Last Friday tunnelers, politicians and members of the public alike celebrated the initial breakthrough of the 4200ft (1.25km) Devil’s Slide twin tube tunnel project in San Mateo County, California. Three years after breaking ground on the project, and about four weeks ahead of schedule, Kiewit holed through on it’s northbound tunnel at the northern portal using an AM-105 roadheader, greeting a crowd of invited guests gathered atop the Devil’s Slide bridges.