Bertha Launch Pits Become Tunnels Gallery Bertha Launch Pits Become Tunnels Alaskan Way Viaduct, Design-Build, Highways, Washington Bertha Launch Pits Become Tunnels ENR Northwest » The launch and exit pits created for tunnel-boring machine [...] By Michelle|2017-10-12T09:36:16-08:00October 2, 2017|Alaskan Way Viaduct, Design-Build, Highways, Washington|Comments Off on Bertha Launch Pits Become Tunnels Read More
