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Caldecott Tunnel Fourth Bore Project: Paleontology
August 9, 2010

See also:

Tunneling Begins on $420 Million Caldecott Tunnel Fourth Bore Project
More video:
- Caldecott Tunnel Fourth Bore Drilling Begins
- Former Assemblywoman Lynne Leach on the Origins of the Idea for the Caldecott Tunnel Fourth Bore