Three three-year-old GP40-2s lead a Boston & Maine train as it heads west alongside the Deerfield River. This line, originally built by the Troy & Greenfield Railroad in the 1840s, has a relatively gentle grade (which explains the lack of dynamic brakes on these locomotives) across the Green Mountains, thanks in part to the 4?-mile long Hoosac Tunnel, roughly ten miles ahead, which opened in February 1875. B&M 301 would later become HATX 513, and then Canadian Pacific 4656. (Charlemont, Massachusetts – June 28, 1980). John Held Photograph, Craig Walker Collection
