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.
According to ENR, the U.K. government has approved the 7-year, $32-billion London Crossrail Project which will reportedly be Europe’s biggest civil engineering project. It will include 41.5-km of tunnels 6-m in diameter laid out in pairs. The tunnels will pass underneath London and connect surface networks on either side of the city. Link after the break. (Photo by tkosaka)