In late 2019, the Washington State Department of Transportation and Seattle Tunnel Partners (STP) engaged in a nine-week trial of claims arising from construction of the new State Route 99 tunnel under downtown Seattle. One major issue for the jury was whether STP had encountered “differing site conditions” – unknown underground conditions that differ materially
Update on Alaska Way Viaduct Replacement
Occasional visitors to Seattle may be surprised to discover that their favorite route from the airport to downtown has changed. State Highway 99 no longer links to the Alaskan Way Viaduct into downtown Seattle. The waterfront viaduct has been closed and demolition has begun. The Battery Street tunnel that connected viaduct traffic to Aurora Avenue