— Metro (@metrolosangeles) July 20, 2017
Attentive Source readers know that the Regional Connector project is building twin 1.9-mile rail tunnels under downtown Los Angeles to connect the Blue, Expo and Gold Lines.
The good news from Tuesday: the tunneling of the first of those tunnels was completed when the tunnel boring machine (TBM) reached the intersection of 4th and Flower. The TBM launched from Little Tokyo in early February.
The remaining section of the tunnel between 4th and Flower and 7th and Flower will be dug by the cut-and-cover method — from the surface down — instead of by a TBM. The reason: tunneling in this section is difficult due to the many large buildings and foundations in the area.
As for the machine, it will be disassembled, trucked back to Little Tokyo, inspected and then rebuilt and relaunched to dig the second tunnel.
When completed, the Regional Connector will create two light rail lines: one that runs between Azusa and Long Beach and the other that runs between East Los Angeles and Santa Monica. The two lines will share five stations in downtown L.A. and will make travel to and through DTLA faster and more convenient with fewer transfers.
The Regional Connector is currently forecast to be completed in late 2021. It is funded by Measure R and federal and state grants.