 By 1840, work had been completed not only on the Main Line of Public Works but on many other lines, officially called "divisions".The Main Line consisted of the Eastern Division, the Juniata Division, the Western Division, the Philadelphia and Columbia Railroad, and the Allegheny Portage Railroad.North–south divisions operated along the Delaware River in the east, the Susquehanna River in the middle of the state, and the Beaver River in the west.