Res6cue_dot_com ...
Since you heard some mention of Hwy 421, along with the other locations, I believe that eliminates Haywood County Sheriffs.
I don't believe you heard North Wilkesboro PD comms, for a couple of reasons. You heard a repeater, but no agency in Wilkes County is licensed for 154.725 anymore, much less a repeater on the channel (per F.C.C. ULS).
Although anything is possible with regards to tropo, tropo in the public safety bands - particularly VHF, from my experience - is typically more-common to hear when repeated / rebroadcast by an end user, or a repeater along the signal path.
I knew what you heard when I saw your post this morning, but didn't have time to post a reply before going to work.
Your posting of the MP3 file, which I heard a few minutes ago, quickly confirmed my opinion. Listen to the first rfew seconds ... the mention of Tac 1 and meeting at station. This is a rescue / ems channel.
Go to the RR database for Wilkes County:
Wilkes County, North Carolina (NC) Scanner Frequencies and Radio Frequency Reference
Look halfway down the first section, and note a rescue tac channel repeater (repeater confirmed in ULS database) on 159.195 MHz. Although no PL tone is noted, it's fair to say - looking at the database listings for Wilkes County - that 151.4 Hz. is used fairly often on the county's channels.
HERE'S WHERE WE TAKE THE LEAP OF FAITH !
I believe, but cannot confirm, that 159.195 is actually Rescue Tac 1, rather than 155.175 listed in the RR database.
The input for the Rockland County PD channel on 154.725 / 151.4 R appears to be 159.195 MHz. Would I be correct that the input tone is 151.4 Hz. ?
If so, I believe you heard Wilkes County Rescue on 159.195 / 151.4 R via the Rockland County PD repeater ... and I congratulate you on the nice catch ! It's catches like that one that will make you go into search mode, looking for more DX to log.
Again, thanks for making the recording. Being able to listen and replay the audio can help ... especially when the modulation is weak.
All the units mentioned on the recordiing were using 89xx unit numbers. According to the N.C. fire station list in the resources section of
CAROLINASFIREPAGE.com | The Carolinas Emergency Incident Notification Network , station 89 is Wilkes County Rescue.