Well that's interesting. I used to be able to pick it up daily from home, the last few times I've monitored it, I haven't heard anything.
I'm assuming its mostly being used for TONE-OUTS?
When i lived up there years ago, they just used it for tone out or for a backup or for outside agencies that couldn't communicate on example fire ground 1. When I worked for the FPD long long ago this is too how it was, but dispatch and mobiles communicated.
The reason you may not hear the tone outs is they do simulcast sometimes, but many times they just use the tower closest to the agency needed. Augusta, West Alton, I know had towers. There are others but cant remember where. You might get a chance to hear this when they are doing tone tests for each department if they still do it.