A quick update on an item I posted nearly a year ago: https://mt-fedfiles.blogspot.com/2017/07/new-vhf-trunking-at-lake-mead.html
At the time I heard the Site 2-122 control channel on 172.1375 MHz. During my most recent trip to the Las Vegas area, I caught the control channel on 172.1125 MHz. The site is still broadcasting the same system information and using a NAC of A52.
But during my times of watching the control channel activity, I have yet to see anyone using the system. I've not seen any affiliations to this site and no voice channel grants.
The general assumption is that this is a multi-site VHF P-25 trunked system for the Department of Interior, who manages the Lake Mead National Recreation Area. And with the disbanding of the Hoover Dam Police last year, it was also assumed that the Park Police would take over patrolling the Hoover Dam and related visitors centers. That activity has not yet shown up on the new radio system.
I'll continue to monitor this system as I make it into the Southern Nevada region.
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