If you're in Marshall Co, you still should see if you get a solid signal on the Ohio Co site [P25 control channel = 453.3375]. If you get a solid signal on this one, you should monitor it as well. the vast majority of Ohio Co and Marshall Co traffic can be heard on the Ohio Co site -- because it is a multisite-simulcast site wiith some of the transmitter sites in Marshall Co.
If you are just monitoring a single Marshall Co site, you aren't going to hear all of the Marshall Co traffic that you should be hearing.
Mike