The world's largest diameter tunnel boring machine will arrive in Seattle next year, but you don't have to wait until then to check it out. A 10-foot long, motorized model of the massive machine that will dig the SR 99 tunnel is currentlly on display at Milepost 31 in Pioneer Square.
Check out the model at Milepost 31 (211 1st Ave. S.) anytime between 11 a.m. and 5 p.m., Tuesday through Saturday. Admission is free. Milepost 31 is an information center celebrating the people and projects that shaped Pioneer Square, and provides an inside look at the SR 99 Tunnel Project.
To learn more, visit https://wsdotblog.blogspot.com/2012/07/youre-invited-to-unveiling-of-seattles.html.
