Allegheny Valley Railroad ended in 1891.
Allegheny Valley Railroad was created in 1852.
Allegheny Portage Railroad ended in 1857.
The original Allegheny Valley Railroad (AVRR) was formed in 1853, and it was constructed to transport oil from Oil Creek and Titusville to market. (Oil was first drilled there in 1859, and this began the modern petroleum age.) There are a number of historical societies with "holdings" that speak to the formation and evolution of the AVRR, and more than a few model railroad clubs in the area have documentation.
Allegheny Portage Railroad was created in 1831.
Ligonier Valley Railroad ended in 1952.
Bachman Valley Railroad ended in 1886.
Chattahoochee Valley Railroad ended in 1900.
Cumberland Valley Railroad ended in 1919.
Lebanon Valley Railroad ended in 1858.
Shepaug Valley Railroad ended in 1873.
Coos Valley Railroad ended in 1982.
Vaca Valley Railroad ended in 1877.