Agreed. so go to each callsign and look at site coordinates and create a map based on that.
Since the map, I just provided tells you how many sites there are for each county.
The FCC coordinates should match up real close to the number of sites listed, not including any recent fill-in sites that have come online, my map is dated from early on the planning of this system.
The major sites have not changed much other than the hardware inside.
It will take a bit of detective work but it will surprise you how big it really is, also don't discount the microwave licenses they will help you cross-reference the sites quite nicely.
FCC Data is your key, pay attention to the FRNs that will help link things together.
I have a microwave and site map in PDF someplace I will have to find it and reshare it here.
HH