Drilling firm takes to tunnels of San Francisco for rehab work

12/21/2004 | Associated Construction Publications

The firm awarded the contract for rehabilitating tunnels in San Francisco has faced a multitude of challenges. In addition to rerouting traffic around some busy intersections, Drill Tech Drilling & Shoring, of Antioch, Calif., had to work within a tight nine-month time frame and had workers on one Caltrans railroad track just a few feet away from another "live track," with high-speed commuter trains roaring by.

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