I used to take my kids train watching around where this slide happened (if I recall correctly). Used to take the Ohio River Blvd towards towards Aliquippa then turn onto the I-79 bridge for a short while and take the "Glenfield" exlit before crossing the river. There was a nice straight stretch of tracks down there where you could sit and watch trains for hours.......
Yep, you were just west of the slide.
Since the merger there has been a lot of interesting road names being used for towing power. The NS has been leasing from other roads so you could see UP, Southern Pacific/Sante Fe, Burlington on the front without having to travel west. Possibly where you were there watching you might have seen plenty of Blue or Black going by and in past years maybe that was all. Once when we were eating at the Grand Concourse Restaraunt and the restored PRR company A-B-B-A (or just the A-B-A ?)set went by with the also restored Presidents' coaches. Very interesting to read about them years before and then finally see them.
Before the terrrorist days I was able to drive right into the Conway yards, further west of where you were, and take pictures without being approached. I had my daughter with me on an off school day about fifteen years ago and figured she would love it
. We had front row seats at the two hump yards and at the engine facility turntable. Also was amazed by rows of dead engines that had been scavenged. Times were good and lots of glut.
I never got as far as to buy a scanner and chase trains as I guess some do. It didn't sport that much wood for me.