Metro Orange & Blue Line Rehabilitation

Washington, D.C.
Washington Metropolitan Area Transit Authority
Parsons Transportation Group
Year Completed: 

The WMATA Orange and Blue Line Rehabilitation is one of Metro’s largest and most complicated projects. The six-year project included the rehabilitation of Orange/Blue Lines from the Stadium Armory Station in the District of Columbia to the National Airport Station in Virginia. The project covers 27 miles of track and 23 stations in six phases.

Typical work included traction power, automatic train control, motor control centers, communications upgrades, track fasteners replacement, tunnel lighting replacement, tunnel ventilation, and fire standpipe rehabilitation. Station rehabilitation included complex platform structural slab/tile replacement, canopy roof replacement, station vaults repair, air conditioning/ventilation equipment rehabilitation and replacement, lighting, and extensive elevator/escalator rehabilitation. The project also included the repair of eight miles of tunnel, 26 kiosk replacements in 18 stations, and the repair and removal of the automatic drainage pumping station and sewer ejector systems in two stations.  

Given the size and complexity of the project, working in an active railroad with various constraints, and all the necessary coordination interfaces, the project had significant challenges for both WMATA and Clark. Clark’s expertise managing workload on these active railroad lines enhanced Metro’s ability to keep the system in a state of good repair, with minimal disruption, increased productivity, and reduced cost. 

Operational efficiencies introduced by Clark include extensive coordination and monitoring of work, with hour-by-hour work schedules. Clark also has used its design expertise to implement practical design solutions to increase safety and production and minimize the impacts to WMATA operations and the traveling public. 

Smooth operation required interface with multiple third parties that can impact work flow and safety. Clark is monitoring hundreds of tie-in points (such as power shutdowns with Pepco and Dominion Power), mitigating bottlenecks, and instituting solutions to ensure that work is done safely and with no disruption to the system.