The Pennsylvania counties of Bedford, Huntingdon and Fulton lie about midway between Philadelphia and Pittsburgh. They are located deep in the eastern ridges of the Allegheny Mountains, and are bounded by the Mason-Dixon Line to the south and by the Juniata River to the north. The region is dominated by a remarkable geographical feature - Broad Top Mountain. On this high tableland, some 80 square miles in size, is a rich deposit of semi-bituminous coal.