Press Release--final First Central Subway Tunnel Boring Machine to Pass Beneath Existing BART and Muni Metro 11.20.13 final.pdf Share this: FacebookTwitterLinkedIn Thursday, November 21, 2013 Related Press Releases First Central Subway Tunnel Boring Machine to Pass Beneath Existing BART and Muni Metro Tunnels, Extending T Third Line Tunnel Into Union Square Documents Press Release--final First Central Subway Tunnel Boring Machine to Pass Beneath Existing BART and Muni Metro 11.20.13 final.pdf