Actually both Tooele and Box Elder are simulcast as well, they just aren't listed that way in RR. So Tooele for example you only need the CC from one of the sites listed programmed into your scanner and it will deviate the rest. Just like for Cache you'd only need 852.1375 programmed and the scanner will automatically do the rest. Box Elder is the same way which is why I asked if anyone knew of which of the seven sites listed for Box Elder county was the one needed for control. It's no biggie I programmed all 7 CC's in so I'll just leave it at that for now.
I do not see a site named Tooele, and any sites in Tooele County are not in Box Elder County....There is also no site named Box Elder, and there are seven IR or single site locations in Box Elder. So "Toole and Box Elder are simulcast" is incorrect.
What you may be talking about is "affiliation" in which a mobile unit will affiliate with a site and use a Talkgroup. That Talkgroup will ALSO be carried on adjacent neighbor sites so you hear the same words being spoken at the same time in a few sites. That is not simulcast as it is defined.
"The main CC of the region" could better be said "What site covers the largest area"