A follow up discussion on the proposed Immersed Tube Tunnel to replace the West Seattle bridge.

by WaBA on August 22, 2020

SDOT is evaluating the costs and benefits of six options to reconnect West Seattle – five bridge options and one tunnel option.

Join news-making retired civil engineer Bob Ortblad and Washington Business Alliance co-founder David Giuliani for a discussion of these options, and the advantages of different Immersed Tube Tunnel options.

Showcasing innovation and unique ideas is part of the entrepreneurial spirit which guides the Washington Business Alliance. Join us for this webinar and stay connected as we bring you more exciting ideas for the state’s transportation future.


  • David Giuliani: Co-founder: Low Carbon Prosperity Institute and Washington Business Alliance 
  • Bob Ortblad: Civil Engineer, Retired