California Construction News staff writer
Tunneling has been completed for the Metro Los Angeles D Line (Purple) Extension — a major milestone.
Contractors used two tunnel boring machines (TBM) to excavate 40 to 60 feet of tunnel each day. Metro will now continue to work with Skanska-Traylor-Shea and Tutor-Perini/O&G to complete seven new underground stations along the route.
“During the five years of tunnelling, Metro overcame several technical challenges such as gassy ground, tar sands and engineering feats that Metro has undertaken,” said Lindsey Horvath, chair of the LA County Board of Supervisors and Metro Board Member. “The complexity is matched by the immense value the project will bring to Los Angeles when it opens and carries 30,000 daily riders through one of our densest and most job-rich regions.”
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