Hitachi Zosen signs contract to build SR 99 tunnel boring machine
Press release:
Hitachi Zosen Corp. of Japan cemented its role in the SR 99 Tunnel Project on Wednesday, signing a contract with Seattle Tunnel Partners to supply the machine that will tunnel beneath downtown Seattle.
“Signing this contract gets us one step closer to taking down the vulnerable Alaskan Way Viaduct,” said Gov. Chris Gregoire. “This state-of-the-art technology allows us to keep SR 99 – and the region’s economy – open for business during construction to replace this critical state highway.”
In July, Hitachi signed a letter of intent with Seattle Tunnel Partners, the Washington State Department of Transportation’s design-build contractor for the tunnel project. The letter of intent allowed the Japanese firm to begin preliminary design of the machine this summer. WSDOT will pay Seattle Tunnel Partners approximately $80 million for the machine, an amount included in the tunnel project’s $1.35 billion contract.