Ops! My prior post was in answer to Dogbert regarding the old LIRR coaches that were originally stored out by the 65th Street floats.
But while I'm on I might as well help to answer Joe's question.
When RS-100 goes down the line (Bay Ridge bound) I notice often there will be two or three engines and an average of 15-30 cars of mixed freight. Two engines are the norm for the shorter consists, and three engines for longer trains (and most certainly whenever the inbound loads consist of trap rock). On an number of occassions RS-100 will return light from Bay Ridge.