The $242-million project to increase the tunnel's clearance for double-stack intermodal trains and improve drainage is now scheduled to complete this year.
Contract is part of a larger project to double track capacity crossing the Potomac River in Washington, D.C., addressing a key chokepoint for the heavily used passenger rail corridor.
Long Bridge Rail Partners, a joint venture, will serve as the design-build contractor for the project's south package, which includes the Potomac River crossing.
The CSX Florida Improvement Plan Bridges Project replaced three railroad swing bridges with upgrades to bridge operation systems, mechanical systems and machinery.
Maryland officials are scrambling to find another strategy to finance the $425 million expansion of an aging Baltimore freight rail tunnel, following CSX Transportation’s withdrawal from the project earlier this month.