Sound Transit approves Northgate Extension construction contract

Sound Transit's board has approved a $440 million contract with JCM Northlink L.L.C. to mine 3.4 miles of twin light-rail tunnels as part of the Northgate Link Extension project.

The contract, which the board endorsed on July 25, is the largest construction contract the agency has awarded, Sound Transit officials said in a press release.

The work is scheduled to begin this fall and take about four years to complete.

JCM Northlink is a joint venture formed by Jay Dee Contractors of Livonia, Mich.; Frank Collucio Construction Co. of Seattle; and Michaels Corp. of Brownsville, Wis.

The 4.3-mile Northgate Link Extension will connect the Northgate, Roosevelt and University District neighborhoods to downtown Seattle and Sea/Tac Airport. The $2.1 billion extension is scheduled to open in 2021.