Associated Press/Komo News 4 » Seattle’s tunnel project is two years behind schedule and now expected to cost $3.1 billion, according to a report by the Washington State Department of Transportation (WSDOT). An inspection at the end of March 2015 found new cracks on the existing Alaskan Way Viaduct near the site where the tunnel boring machine known as Bertha is being repaired by the Seattle Tunnel Partners.