Bay Area Rapid Transit (BART) in San Francisco and the San Mateo County Transit District (SamTrans) were implementing an 8.2-mile, 4-station extension of the BART rapid transit system to serve San Francisco International Airport. This project consisted of a 7.4-mile mainline extension from the existing BART station at Colma, through Colma, South San Francisco, and San Bruno, terminating at the Millbrae Avenue BART/CalTrain Station. An additional 0.8-mile spur from the main line north of Millbrae will take BART trains directly into the airport, to a station adjoining the new International Terminal. 

 

NBA Engineering was responsible for the system wide raceway design and construction cost estimate.  This included drawings and specifications for the installation of all 8.2 miles of duct banks, raceways, conduits and lateral conduit up to the structures, such as gap breaker, switching station, and traction power substation.  NBA also prepared over 600 composite drawings and coordinated with vendors, the electrical contractor, and civil, structural and train control designers.