The Hoosac Tunnel bores through 4.75 miles of mountain in Western Massachusetts. Construction took place between 1851 and 1876, opening a railroad route between Boston and Albany. The project claimed 295 lives.
This image shows tracks entering the tunnel in North Adams, on the western end of the tunnel.
For a 1947 topo map showing the Hoosac Tunnel, see http://docs.unh.edu/MA/nadm48nw.jpg
By skyeye @ 2007-10-29 16:12:54