Harriet, the tunnel boring machine, retires after digging twin tunnels for Crenshaw/LAX Transit Project
April 26, 2017
The Los Angeles County Metropolitan Transportation Authority (Metro) today celebrated the end of tunnel excavation for the Crenshaw/LAX Transit Project. Harriet, the tunnel boring machine (TBM), completed digging the second of the twin tunnels for the light rail line on April 6.