| Here is page 39 of Mahlon J. Baumgardner & Floyd G. Hoenstine's 1952 monograph entitled "The Allegheny Old Portage Railroad: 1834-1854." The illustration is entitled "Inclined Plane No. 1." Caption: "The western approach to the first railroad tunnel built in America (1834). The power house for this plane was located at this point, which was four miles from Johnstown." |