On August 24, 2010 Caltrans, the Contra Costa Transportation Authority (CCTA) and other project partners marked an historic moment for the Caldecott Fourth Bore Project.
Standing next to a monolithic custom-designed, electric-powered road header, dignitaries gathered at the tunnel’s eastern portal in Orinda to mark the beginning of a project that had been years in coming.
Three years to the day that tunneling began; the Lafayette Historical Society will mark a significant anniversary of the Caldecott Fourth Bore Project. Senior Geological Engineer Chris Risden and Fourth Bore Public Information Officer Ivy Morrison will use dramatic tunnel photos and geological specimens from the Fourth Bore to provide a behind-the-scenes overview of tunnel history, geology and excavation, as well as recent footage capturing the tunnel’s progress, as it nears completion.
The Fourth Bore near completion
When it opens to traffic in late 2013, the Caldecott Fourth Bore will relieve traffic congestion in the off-peak direction along State Route 24 between Alameda and Contra Costa counties. The $402 million Fourth Bore Project is one of the largest recipients of federal Recovery Act funding in the nation – a testament to its importance to Bay Area transportation. The project is also receiving significant funding through Measure J, a half-cent sales tax measure passed by Contra Costa voters in 2004, along with other state and regional funds.
WOW! Three years to build the fourth bore ….. seems like it started last year. Looking forward to seeing this new tunnel and the art work at the tunnels entrance. Amazing!