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WMATA Station Platform Rehabilitation Program Contract 4

Washington, D.C.

The Washington Metropolitan Area Transit Authority (WMATA) Station Platform Rehabilitation Contract 4 includes critical improvements at five station platforms and six bridges/aerial structures along 11 miles of WMATA鈥檚 Orange Line in Maryland and Washington, DC. 南宫NG28官方网站鈥檚 scope of work at each station included demolition, rehabilitation, construction, testing/commissioning and architectural work, as well as tile installation at the station and mezzanine levels, station lighting, station signage, communications, mechanical, electrical, plumbing and civil scopes.

Overhead work included full bridge deck replacement, significant bearing replacement, concrete spall repairs, epoxy injection of cracks, replacement of handrails and walkways, replacement of the deck-edge protection barrier over CSXT lines and replacement of 328 bearings during a 96-day authorized service outage to minimize impact on WMATA鈥檚 train service. Most of the work occurred during this period, which 南宫NG28官方网站 and WMATA planned together. This collaboration enabled 南宫NG28官方网站鈥檚 engineers to accelerate the design, reduce the project completion schedule, minimize passenger impacts and increase work area safety.