Quite a few of the early concrete towers are still standing in northern Illinois. There are also old tower sites not on the article's map in my area. I suspect

Quite a few of the early concrete towers are still standing in northern Illinois. There are also old tower sites not on the article's map in my area. I suspect many towers around here get new leases on life for data links, and the old long-distance switching center outside Norway, IL still has a mast with an impressive number of antennas.