Check out the April 17, 2023 edition of ENR California/Northwest, featuring excavation in Seattle with Mudhoney, West Coast Top Starts, California Owner of the Year, news and more!
Superlative-filled tunnel-boring machines are nothing new to Seattle. From the infamous mole that dug a new State Route 99 tunnel to a handful of TBMs carving a new path for Sound Transit’s aggressive light rail expansion, tunneling under the Pacific Northwest city is almost commonplace.