Central Link Light Rail

First Hill Streetcar Maintenance Facility
September 29, 2017
Temple Beth Am K’hilah Center
August 22, 2017

Location: Seattle to Tukwila, Washington

The initial segment of the Sound Transit Central Link Light Rail was $2.4 billion project that involved construction of a new 14-mile-long light rail line running from downtown Seattle to Tukwila. The passenger trains stop at twelve stations and run on 4.4 miles of elevated tracks, 2.5 miles in tunnels, and 7 miles at grade. Contract 510 involved a retrofit and expansion of the existing Downtown Seattle Transit Tunnel. Contract 700 involved construction of 2.6 miles of rail line, the Sodo Station, modifications to the E-3 Busway, and a 10-foot-wide bike path. Contract 710 involved construction of a one-mile bored tunnel 150 feet underground, the west and east portals, a half mile of elevated trackway, and the Beacon Hill and McClellan Stations. Contract 735 involved construction of 4.3 miles of double tracks, Columbia, City, Othello, and Rainier Beach stations, and new water/sewer lines, power/communication lines, pavement, sidewalks, and plazas. Contract 755 involved construction of 0.065 miles of guideway structure at grade, 4.22 miles of elevated guideway structure, an aerial station, utility undergrounding, and related facilities. Contract 810 involved construction of a 162,000-square-foot operations and maintenance facility consisting of a one-story light rail vehicle shop, a one-story truck repair shop, and a four-story administration building.

ORA’s scope of work included, but was not limited to, the following items (varying by contract):

  • Contractor quality assurance (QA)
  • Soils (including limited geotechnical support)
  • Asphalt paving
  • Epoxy grouting
  • Reinforced concrete
  • Precast concrete fabrication
  • Schmidt hammer testing
  • Shotcrete
  • Floor flatness survey
  • Video survey
  • Holiday testing
  • Pull testing
  • Locating services
  • Structural steel
  • Nondestructive testing of rail welds
  • Destructive testing of rail welds (dynamic bend tests, slow bend tests, and hardness tests – subcontracted)
  • Corrosion testing (subcontracted)