Cars for Blommer Chocolate\'s upper spur are delivered from the UP North Avenue yard. A few years ago from a building high above the area I was able to watch the entire operation prior to all the tall condo buildings going up. A locomotive shoves a car (or more) down into the throat of the Ogilvey Transportation Center station from the Northwest Line, then criss-crosses from the Northwest Line to the West Line using ladder tracks. The train then heads down the West Line, stops at the switch to the upper level spur, and backs the freight car down into it alongside the north side of the Peerless building.
This movement takes place in late morning from what I have seen, including yesterday coincidently at about 11:30AM as I saw from an inbound Metra train. The freight train was on the upper level and waiting to push a car into the spur.