Another break thru for TBM on purple line extension.. Had to bore thru many dangers including methane gas. Note unit was pressurized to keep various item out of tunnel.
L.A. Metro’s Elsie makes another break through for Purple Line Extension Project - Railway Track and Structures (rtands.com)
Neat.
Completing the Purple should be a boon to UCLA students, though will be a few years too late for my daughter.
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