GM:
It seems like the area has passed the tipping point and industries are leaving at an accelerating rate.
Gutmann Tannery was served by the Milwaukee Road via the Deering Line for many decades. Though tracks were cut back to McLean and Dominick in the early 1990s, three blocks south of Gutmann, CP Rail still showed Gutmann as a rail served customer in a 2001 listing.
My 2006 feature article in spring issue of The Milwaukee Railroader magazine on the Deering Line has a couple of pictures of trains on the Deering Line passing in front of Gutmann.