Walsh Construction Company II, LLC has been awarded a $108 million contract to build the Hilltop Tacoma Link Extension and accompanying seven platform stations, the Sound Transit Board of Directors announced on Thursday.

The project will extend the rail line 2.4 miles from downtown Tacoma’s Theater District to the Stadium and Hilltop districts.

“We couldn’t be more excited to finally break ground and begin construction on this expansion of Tacoma Link to the Hilltop,” Tacoma Mayor and Sound Transit Boardmember Victoria Woodards said in a statement. “This project has already generated economic growth in the Hilltop district and we anticipate future development that will draw more people who want to live and work in downtown Tacoma in the coming years.”

The contract includes utilities relocation, expansion of the Tacoma Link Operations and Maintenance Facility, road restoration, and construction of five traction power stations, an overhead contact system, traffic signals, and ADA curb ramps. Five additional light rail vehicles will also be added to the Tacoma fleet.

In total, the Hilltop Tacoma Link Extension will cost an estimated $217 million, funding for which comes from Sound Transit, the City of Tacoma, and a $75 million grant from the Federal Transit Administration.

Construction is expected to begin as early as this fall. Service is expected to started in 2022. By 2039, another voter-approved extension will expand the Tacoma Link rail line to Tacoma Community College.

Based in Illinois, Walsh Construction’s past and current projects include the Seattle Denny Substation and the Crenshaw/LAX Transit Corridor in Los Angeles, a light rail system connecting LAX Airport to Inglewood and the Historic Crenshaw District.