Viaduct tunnel route could cost $3.5 billion
No matter which option is chosen for replacement of the Alaskan Way Viaduct, it will come with a big price tag for taxpayers to swallow.
A bored tunnel running under downtown from Royal Brougham to Roy Street may cost $3.5 billion. A cut-and-cover tunnel, $2.7 billion. The integrated elevated highway running on top of residential and commercial buildings and under a citywide park may cost $2.2 billion. A lidded trench $1.9 billion. A side-by-side, four-lane elevated highway, $1.6 billion.