The USGS has made available current and historical topographical maps doe the entire US (including Alaska and Hawaii. There are many scales and dates available. You can obtain them from this link:
http://geonames.usgs.gov/pls/t...89938261050::NO:RP::
The maps are big. They are in a pdf format so any of the readers will work. The only problem is the map name may not be what one would expect.
Jan
East Broad Top Rockhill Yard in 1966
Jan