WSDOT OKs Deal With Tunnel Team

The Washington State Department of Transportation has signed a $1.35 billion design-build contract with Seattle Tunnel Partners to replace the Alaskan Way Viaduct with a bored tunnel. Ron Paananen, program administrator for WSDOT, said this is the biggest single contract in state history.

The contract includes $1.09 billion for tunnel boring, mitigation of any tunnel settlement, construction of portals, building the road within the tunnel and constructing two operations buildings. Another $210 million is included for inflation, bonding and insurance requirements.

There also is $70 million for incentives, including $25 million to finish the project early. Read more...