From what I see here they may be on 155.7000.
The county is on MARCS. Kenton may be too. Would make sense for interop reasons.
Hardin County (33) Talkgroups
DEC HEX Mode Alpha Tag Description Tag
25856 650 D CO33 EMS County EMS Dispatch EMS Dispatch
25872 651 D CO33 ENG County Engineer Public Works
26016 65a E SO33 DSP County Sheriff Dispatch Law Dispatch
26032 65b E SO33 TAC County Sheriff tactical Law Tac
26096 65f D FD33 DSP County Fire dispatch Fire Dispatch
28784 707 D LHD HARDIN ODH mutual aid-Hardin County health department Interop
30224 761 D HOS-3301 Hardin Memorial Hospital (Kenton) Hospital
58128 e31 D COEMA-33 Hardin County EMA Interop
63104 f68 D SO-33 Hardin County statewide interop