Geotechnical drilling was set to begin yesterday on the 710 Tunnel Technical Study in the L.A. area. Currently the 710 freeway ends along the city of Los Angeles-Alhambra boundary but was intended to run north to a junction with the 210 and 134 in Pasadena. The tunnel technical study will assess the feasibility of building a tunnel to complete the segment. Caltrans and CH2M HILL will be performing the borings which will go up to 250-ft deep. Seismic lines will be performed as a part of the study as well. Source: LA Times.
US House Passes National Tunnel Inspection Program
January 25, 2008 rockman Standards and Codes Comments Off on US House Passes National Tunnel Inspection Program
The US House of Representatives passed legislation approving a national tunnel inspection program. This of course came about as a result of a fatal accident from 2006 in a tunnel on Boston’s Big Dig project where a concrete ceiling tile fell on a car killing one person. More after the break.
Bertha tunnel-boring machine arrives in Seattle
April 12, 2013 rockman Project Related Comments Off on Bertha tunnel-boring machine arrives in Seattle
Caldecott Tunnel fourth bore nears end of big dig
August 22, 2012 rockman Project Related Comments Off on Caldecott Tunnel fourth bore nears end of big dig