Just two years ago in Seattle, the University Link Tunnel was completed ahead of time and under budget, while all media attention went to the Alaskan Way Viaduc

Just two years ago in Seattle, the University Link Tunnel was completed ahead of time and under budget, while all media attention went to the Alaskan Way Viaduct Replacement Tunnel (Bertha) which was over budget and massively delayed. The former was a relatively standard tunnel using standard machines, while the latter was the largest single-bore tunnel ever attempted.