Workers in Osaka, Japan, are almost done assembling the world-record, 57.5-foot diameter drill that will churn beneath downtown Seattle next year, to form the Highway 99 tunnel.
On Nov. 29, the giant cutter head will be hoisted and attached to the front of the cylindrical machine, longer than a football field. The team at Hitachi-Zosen will test the machine before the Washington State Department of Transportation formally accepts it at a ceremony in December.
Construction of the drill is on schedule, said Chris Dixon, project director for Seattle Tunnel Partners.
Copyright: The Seattle Times