Bechtel’s Dulles Transit Partners has completed phase 1 of the $1.2bn Dulles Corridor Metrorail Project, which is also known as Silver Line.
A consortium led by Bechtel has constructed the 11.7-mile rail line connecting the Washington region’s existing metro system for the Metropolitan Washington Airports Authority.
Bechtel project executive director Larry Melton said: "Substantial completion is an important milestone that signals major work is finished and that soon riders will travel on a 21st-century transit system.
"This achievement is remarkable given the complexity of building a rail line in a densely populated area where 700,000 cars travel each day."
Phase 1 of the project includes five stations, a six-mile elevated track that will carry Metrorail trains at heights up to 65ft above the Capital Beltway and over Tysons Corner, and a tunnel across the busiest retail areas in the country.
The Washington Metropolitan Area Transit Authority will conduct the final testing before the commencement of passenger service on the line.
Dulles Transit Partners will continue to make improvements to Routes 7 and 123, as well as completing sidewalks, landscaping and general touch-ups in the stations.
Under phase 2, Capital Rail Constructors will be responsible for the construction of 11.4 miles of rail line, as well as six new stations at Reston Town Center, Herndon, Innovation Center, Dulles Airport, Route 606 and Route 772.
The complete Silver Line project involves a 23-mile extension of the existing 106-mile Metrorail system serving Washington DC, as well as parts of Maryland and Virginia.
Bechtel has also delivered other rail projects including the San Francisco Bay Area Rapid Transit system, Athens Metro in Greece and High Speed 1 in the UK.
Image: The D Route pocket track (D98) was to be used to turn Silver Line trains. Photo: courtesy of Ben Schumin.