Most if not all of the comms heard on it by me over the past 2 months seem to just be the '700" interagency comm center base talking to units, as-if it's a remote-base on a simplex channel or repeater input. Not much traffic compared to the NPS LAME area repeaters, it's been referred to as the "Hoover" channel and since I heard them dispatch units to a a tourist that fainted on the Dam's Lower Power Plant tour, I assume this is the system that's hooked-up to the 'leaky coax' & BDAs inside the dam.