As of 2007 this spur is still in place though Midwest Zinc is long gone. A vacant lot sits in its place awaiting redevelopment. To the best of my knowledge, Midwest Zinc received its last shipment via rail in 1998 and it was torn down a short time later. Midwest Zinc was the last online rail customer south of North Avenue on the C&E Line.
According to a January 17, 2001, issue of American Metals Market parent company Imco Recycling Inc., dba US Zinc of Houston, shut down the Chicago Midwest Zinc plant that same month. US Zinc acquired the plant from Sipi Metals in 1983. The same article stated that Midwest Zinc was a buyer of zinc scrap and other metals. The zinc oxide produced was used in making tires and other rubber products.
Presumably rail service to the plant took place right up until it closed in early 2001.
A February 9, 2006, article in the Chicago Sun-Times stated that the site would be the home of a new, 80,000 square foot grocery store. It was to replace a smaller Whole Foods store at nearby Sheffield and Kingsbury.
On May 1, 2007, a development group called The Shops at Kingsbury Square LLC filed an adverse abandonment petition with the Surface Transportation Board for the section of track that runs down Kingsbury south of North Avenue to almost Division Street on the southeast. They claim this move is necessary in their petition to allow them to remove the former Midwest Zinc spur that runs into the property off Kingsbury and the easement that the new Chicago Terminal Railroad holds. It is unclear if this development group replaces the earlier Whole Foods development or if is one and the same and operating on behalf of Whole Foods.