The chart was meant to reflect industries located east of the river and off the C&E (Peerless and General Iron Industries), Goose Island (Big Bay), and the Deering Line (Finkl Steel). It should have been clearer in retrospect.
For example, in 2000 Aetna Plywood just off Elston was still an active customer of CP Rail as was Sipi Metals. However Aetna was reached via a spur from the Bloomingdale Line while Sipi was/is reached from the Mill Yard trackage.
If anyone has seen freight cars at Sipi in recent months please post an update.