Drilling to begin on fourth bore of Caldecott Tunnel

August 8, 2010 4:13:43 PM PDT
Crews plan to begin drilling Sunday morning on the fourth bore of the Caldecott Tunnel.

Rock cutting will start in the morning on the Contra Costa County side, but eventually, both sides of the tunnel along Highway 24 will be drilled into.

The $400 million project is expected to be completed in three to four years.