Sorry about that, didn't proofread what I was posting.
Absolutely through freights back then. HS3/SH8 to/from Corning. NY4 hot eastbound, LS3 westbound. I believe ML12, the auto racks, came that way. And others, would have to look through a freight schedule to add them all up. And if there was a derailment on the main line, trains would be sent via Niagara Falls and the Falls Road - including Amtrak.
As for when it was single-tracked, there was discussion on here several years ago but I don't recall what the answer was.
DICCS Zone Y - Copy.jpg
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