Recently published by the California Recovery Task Force, Caltrans put together the following video, first in a series aimed at documenting the construction of the Caldecott Tunnel Forth Bore.
http://www.youtube.com/watch?v=NCWT6jtKYQc
Interviews with newly-hired workers start at 2:23, conducted by Jeff Weiss.
2:23 and 3:33 – Cody Edwards, Construction Engineer
2:49 – Daniel Alegria, Miner
3:19 – Mei Wu, Small Business Owner
4:10 – John Cichosz, Operating Engineer
The video also includes clips of various stages of construction on the fourth bore, including the initial construction of retaining walls and the first drilling by the roadheader.