The Portland Terminal Company was a terminal railroad notable for its control of switching (shunting) activity for the Maine Central Railroad (MEC) and Boston & Maine (B&M) railroads in the Maine cities of Portland, South Portland, and Westbrook. History The Maine Central Railroad (MEC) came under the control of the Boston & Maine Railroad (B&M) in 1884. The New Haven Railroad secured control of the B&M in 1907, and the Portland Terminal Company was formed in 1911 as part of the New Haven's consolidation of New England transportation facilities. Portland Terminal Company became a subsidiary of MEC while B&M was in financial difficulty in 1914. PTM's activities were vital to Portland's role as a winter seaport receiving Canadian products from the Grand Trunk Railway for export to Europe. Shipping from Portland declined sharply as Canadian exports were routed via the Maritime ports of Saint John, New Brunswick and Halifax, Nova Scotia following nationalization of the Grand Trunk in 1923. Exports from Portland declined from per year in the early 1920s to per year during the worst year of the following depression. In the decade following World War II, PTM operated on of main lines and branch tracks, of yard tracks, and of industry-owned tracks. PTM was acquired by Guilford Transportation Industries in 1981, and continues as a subsidiary of Pan Am Railways. Geography Portland occupies an Atlantic coast peninsula between Back Cove to the north and the Fore River estuary to the south. The peninsula is protected from North Atlantic swells by the islands of Casco Bay. Back Cove was too shallow for 20th century ocean commerce. Portland Harbor is the seaward portion of the Fore River estuary. South Portland occupies the southern shore of the Fore River estuary. Westbrook is inland of Portland where the pre-railroad Cumberland and Oxford Canal provided transportation for mills using water power of the Presumpscot River. Grand Trunk Railway from Montreal entered Portland from the north via a long trestle over the mouth of Back Cove. The Grand Trunk yard and wharves occupied the seaward end of the Portland Harbor waterfront along the north shore of the Fore River estuary. This line became the Berlin Subdivision of the Canadian National Railway when the Grand Trunk was nationalized in 1923. Access to the Portland waterfront ended when the Back Cove trestle burned in 1984; and the line to Montreal was sold to a short line