Metro Orange & Blue Line Rehab
The WMATA Orange and Blue Line Rehabilitation is one of Metro’s largest and most complicated projects. The six-year project includes 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 includes traction power, automatic train control, motor control centers, communications upgrades, track fasteners replacement, tunnel lighting replacement, tunnel ventilation, and fire standpipe rehabilitation. Station rehabilitation includes 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 includes 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 has significant challenges for both WMATA and Clark. Clark’s expertise managing workload on these active railroad lines has enhanced Metro’s ability to keep the system in a state of good repair, with minimal disruption, increased productivity, and reduced cost.
The high passenger load requires extensive operational detail, allows little downtime to perform tasks, and involves great risk in case of failure. 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. An example of this is the complete replacement of the Minnesota Avenue and Deanwood stations platforms. Clark’s innovative design and unique work approach has allowed for complete demolition and replacement of the platforms without shutdowns or interruptions to WMATA.
Smooth operation requires 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.