Mile: 48.4, 05-Aug-98
Point of Rocks Railroad Tunnel. Opened in 1868, rebuilt in 1909. Originally built to hold two tracks. When the B&O deeded the canal property to the federal government in 1938, it retained enough canal land to add a second track outside the tunnel, which it finally did in the 1960s. The tracks in the tunnel were replaced by one track, which made room for larger cars.