Pan Am Railways has a subsidiary in which former US Class I railroad in Maine?
Maine Central Railroad Company The Maine Central Railroad Company (reporting mark MEC) was a former U. S. Class I railroad in central and southern Maine. It was chartered in 1856 and began operations in 1862. By 1884, Maine Central was the longest railroad in New England. Maine Central had expanded to 1,358 mi when the United States Railroad Administration assumed control in 1917. The main line extended from South Portland, Maine, east to the Canada–United States border with New Brunswick, and a Mountain Division extended west from Portland to Vermont and north into Quebec. The main line was double track from South Portland to Royal Junction, where it split into a "lower road" through Brunswick and Augusta and a "back road" through Lewiston which converged at Waterville into single track to Bangor and points east. Branch lines served the industrial center of Rumford, a resort hotel on Moosehead Lake, and coastal communities from Bath to Eastport.
Eastern Railroad The Eastern Railroad was a railroad connecting Boston, Massachusetts to Portland, Maine. Throughout its history, it competed with the Boston and Maine Railroad for service between the two cities, until the Boston & Maine put an end to the competition by leasing the Eastern in December 1884. Much of the railroad's main line in Massachusetts is used by the MBTA's Newburyport/Rockport commuter rail line, and some unused parts of its right-of-way have been converted to rail trails.