Sterling, VA
Washington Dulles International Airport

Customer
Metropolitan Washington Airport Authority

RailWorks Business Unit
RailWorks Track Systems
L.K. Comstock & Co.
HSQ Technology

Description
RailWorks is part of a project team to construct the Automated People Mover (APM) system at the international airport.

Scope
RailWorks subsidiaries are performing the following work on the six-year, design-build project:

• Coordinate the design interface with the airport’s fixed facilities designers and the vehicle manufacturer, and provide construction management to install the APM system.
• Design, furnish and install the complete power distribution systems, vehicle wash facility, intrusion detection and automatic platform doors at the stations.
• Design, furnish and install the complete SCADA subsystem with redundant master stations in both the primary and alternate control facilities. The SCADA system will interface with the power distribution system, train controls, communications and security systems.
• Design, furnish and install the vehicle running surface, guidance systems and emergency walkways in the tunnels, maintenance facility and storage yard. Installation includes 21,000 track feet of concrete plinths within the tunnels, 23,000 feet of pre-cast and poured walkway and corresponding handrail, and 25,000 track feet of side-mounted guidance and power rail.
• Install the command, control and communications systems and the APM-related equipment at the facility’s four new stations.

Unique features
The majority of the guideway construction was completed in a double tunnel with very little access, delayed releases and constantly evolving access scenarios under shared conditions. Extensive planning and coordination with other contractors and adaptation to changes were essential components for the success of this project. To maximize productivity, crews worked night and day to install plinth, which then served as the avenue distributing materials and installing the remaining guideway work. RailWorks installed a temporary track system throughout the tunnels and led the way for other contractors. Their installations followed RailWorks and also required use of the temporary track system.

Other participants
Prime contractor: Sumitomo Corp. of America (SCOA)
Contract manager: Parsons Management Consultants