Silicon Valley, California
This Airport access shaft project is 1 of 3 for the Silicon Valley Clean Water’s RESCU program (Regional Environmental Sewer Conveyance Upgrade). The project is the first tunneling progressive design-build of this nature in the US. Malcolm has been brought on as a specialist contractor in constructing the walls for the TBM launch shaft. The job will allow 3 times more water flow than the original 45 year old pipeline. The tunnel is 3.3 miles in length, which is the equivalent to almost 59 football fields.
Malcolm’s diaphragm wall shaft provides access for the tunnel boring machine to start constructing the tunnel. The upgrade is needed due to the significant increase of the population in the bay area, the old reinforced concrete pipes are at risk of leakage and movement, therefore the new tunnel was deemed necessary.
You can read more here: Tunnel Journal 2019_Silicon Valley Tunnel Santa Clara