Pier 50 - King County Water Taxi

Seattle, WA

The Pier 50 concrete float provides docking for passenger-only ferries in downtown Seattle. This 30’ wide x 117’ long structure can accommodate docking of two vessels and connects passengers to shore side facilities.

This monolithic float was constructed using precast concrete interior and exterior walls, with cast-in-place keel and top decks.  Post-tensioning was applied longitudinally and transversely to complete the system.


  • One monolithic, post-tensioned concrete float – 15’ deep x 30’ wide x 117’ long
  • Elevated aluminum walkway on top deck to accommodate gangway and ramp elevations and utility routing
  • High performance, low permeability concrete with epoxy rebar


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