I've seen a picture around 1990 in Trains of just that - as far as freight RR interchanges, the CSS has (had?) Olive siding (NYC); Shops (PM); Burns Harbor (NYC); Miller (B&O); Gary (EJE, PRR, Wab); Hegewisch (IHB, PRR); Kensington (MC, IC) - if you check ebay now and then, you'll find a CSS clip-board or notepad for sale with a diagram of all CSS's interchanges available - these were made years ago to promote bridge traffic.
I asked the question on the Amtrak forum - would Amtrak request a de-energize of the catenary? They always do that when supers run on NEC property. I guess out here its no big deal between the highliners and the occasional diesel train pinch hitting for CSS in the 80's. (it was train 117 at 4:56PM and it was a blast to ride for the first year after the electrics resumed the schedule slot - very few stops cos the diesel was SLOW, but the electrics were fast and that train COOKED!)
The new Acela: It's not Aveliable.