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 … Continue Reading
On January 6, 2011, the Washington State Department of Transportation (WSDOT) signed a contract with Seattle Tunnel Partners for the biggest piece of the SR 99 Viaduct replacement project, the 1.7 mile long tunnel carrying traffic from the south end of the Seattle waterfront to near the Seattle Center. This is a design-build contract with … Continue Reading
