and Eastern trains. Blue Rock Quarry was on the Mountain Division between Westbrook and Portland. Bethlehem Steel delivered 70-ton, 40-foot PTM hopper cars #101-150 in 1956 to replace the old USRA hoppers for coal loading. These cars were used for ballast service as heating oil minimized coal demand. Cars #101-122 were fitted with side extensions for off-line wood-chip loading on the Maine Central Railroad. Locomotives References Footnotes Switching and terminal railroads Maine railroads Railway companies established in 1911 Railway freight terminals in the United States Companies based in Portland, Maine South Portland, Maine Boston and Maine Railroad Predecessors of the Maine Central Railroad Predecessors of Pan Am Railways Non-operating common carrier freight railroads in the United States American companies established in 1911