CalPortland
Description of the E-Crane
In 2012, Calportland was the successful bidder from Seattle Tunneling Partners to unload and process approximately 2.2 million tons of tunneling spoil. The project is the replacement of a double deck above ground highway named “Alaskan Way Viaduct” (SR99) with a tunnel 57.5 feet in diameter approximately 2 miles long underneath the city of Seattle.
The tunneling machine is the world’s largest ever built and was supplied by a Japanese firm, Hitachi Zosen Corp.
To dispose of the tunneling spoil, Calportland engineered and built a temporary offloading system,...