University Link (U220 and U230) Tunnels

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Location

Seattle, Washington, USA

Scope of Supply

Three Robbins Continuous Conveyor Systems

Tunnel Length

2 x 3.5 km (2.2 mi); 3.8 km (2.4 mi)

Ground Condition

Clay, Sand, Gravel, Manmade Fill

 

Continuous Conveyors Transport Seattleā€™s Soft Ground

  • Three continuous conveyor systems transferring muck behind two Herrenknecht EPBs and one Hitachi EPB
  • Specially designed with sealed transfer points, as well as primary and secondary belt scrapers
  • The special design aids in minimizing the spillage of water-bearing ground