June 16, 2014 Slideshows » News

Tunnel-boring process complete for SF Central Subway 

Share on Facebook
Tweet
Submit to Reddit
Email
“Big Alma,” the second of two tunnel-boring machines excavating San Francisco’s first new subway in nearly a half-century, slowly peered its cutterhead out Wednesday, completing the tunnel-boring stage of the Central Subway project.
OF 30
PREV NEXT
1/30

Related Stories

  •  

    hasvalue>

  • Additional Slideshows

    © 2018 The San Francisco Examiner

    Website powered by Foundation