In 1956, the PRR leased a small group of Delaware & Hudson RS-3s and all were formally purchased and officially belonging to Pennsy by 1958. They operated alongside the versions built new for PRR. Photographs show that members of this group operated until at least 1965. It is possible that all of the ex D&H RS-3s were retired and either traded in or scrapped prior to the merger with NYC to form Penn Central. By 1968, PRR had acquired much second generation power from EMD, GE and ALCo - U-boats, Centuries, GP30s, GP35s, SD35s, SD40s and SD45s.
Well for starters I started to loose my hair and sanity after finding 1930s era Track Charts... here's what came out of it so far:
Larimer/Ardara was the worse of the bunch. Reason being because of that West Penn service. oh and finding out about a spur going under the main in Irwin by the station, the team track at Ardara, and a penn-gass company line that went under the main in between Irwin AND Larimer!