Philadelphia Area (General)

Does anyone have any good resources (on-line or otherwise) for researching railroad information in and around the city of Philadelphia? I do alot of research in my job and I've been able to cobble together some go-to documentation, just wondering if anyone knows what else might be out there that I'm missing.

Maps, documents, plans, photos, etc.

A great place to start is the OpenRailwayMaps website

https://www.openrailwaymap.org/index.ph ... e=standard

Here's a list I've made (and have been updating) with all freight ops in the area:
https://docs.google.com/spreadsheets/d/ ... sp=sharing

THANK YOU SO MUCH FOR THESE RESOURCES!!