I think I have determined it to be part of TVA's Security and Emergency Management system. They list only one p25 frequency, and it has the NAC 298. It is for Raccoon Mtn, but I believe this frequency 169.7125 is possibly a repeater in North Georgia.
171.75000 RM 298 NAC TVASEM-Rcoon Raccoon Mtn. S&EM Repeater P25 Federal.