(probably David Gleason's site
http://www.davidgleason.com/.)
In the analog world (at least almost until the end of analog) full-power analog UHF stations at the same site had to be six channels apart. 20, 26, 32, 38, 44. 50. 60 fit in Aurora as the FCC figured the transmitter would actually be in Kane County. But since nobody had built Gary 56, when the Aurora station applied to locate its transmitter in the Loop, it was approved. Joliet 66 happened about the same time. With Aurora 60 transmitting from the Loop, 56 had to stay in Indiana. (this is also why WJYS channel 62 located its analog transmitter in Tinley Park.) (digital full-power UHF stations can be only two channels apart, in some cases even on directly adjacent channels.)
I suppose Kenosha 55 could have been involved but I doubt it. In any case to my knowledge Kenosha 55 never transmitted from anywhere besides where it ended up at the end of analog.