Past Project

N125 Northgate to UW Stations Tunnel Bore TBM

Provided tunnel boring power and maintenance for TBM, creating access to the Sound Transit light rail system. 3-mile-long dual bores, one for each direction. Sundancer provided control and instrumentation services along with consistent power to the TBM.

  • Owner:  Sound Transit
  • Prime Contractor:  JCM (Jay Dee, Coluccio, Michels.
  • Value:  $11m