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The Washington Metropolitan Area Transit Authority (WMATA) has issued a request for proposals (RFP) for a major capital project that involves rehabilitating the Yellow Line Bridge over the Potomac River, and repairing the steel-lined tunnels between the Pentagon and L'Enfant Plaza stations.
WMATA is seeking a construction manager at risk (CMAR) that will coordinate with the agency during the design process and provide a guaranteed price for construction. The process enables the contractor to evaluate construction feasibility, provide value engineering and propose cost-effective alternatives in the design phase, providing more flexibility and cost controls, WMATA officials said in a press release. Responses to the RFP are due April 7.
The agency is streamlining the project's design and construction to save time and money, they said. The project is WMATA's first using CMAR, a method widely used for large-scale infrastructure projects. The design, pre-construction work and pricing happen concurrently to improve project delivery and schedule. Waiting for the design process to be completed before awarding the construction contract would add up to a year to the project timeline.
Constructed in the 1970s and supported by box-girder spans and piers, the Yellow Line Bridge is now showing excessive wear and corrosion. Meanwhile, decades of water infiltration and underground moisture have eroded the steel-lined tunnels, subjecting the liner plates to stray current. WMATA performs ongoing maintenance, however long-term repairs are now necessary.
WMATA expects to begin construction in fall 2022.