Until I looked up the old HAFB System on Monday, I wasn't aware of sites UTTR NE Range, and UTTR SW Range.
Years ago when HAFB got it's first trunked system, the base published a document that identified the original four sites:
HAFB Golf Course, SL Federal Bldg, Cedar Mountain & Grassy Mountain.
Here are the map locations of sites that I am aware of:
41°07'17.0"N 111°56'39.8"W, ground station elevation 4,725' on Hill AFB 41.121389, -111.944389
40°46'00.5"N 111°53'13.4"W, station located at Federal Building in Salt Lake City, 40.766806, -111.887056
41°15'29.9"N 112°14'21.2"W, possible ground station located NE of the Little Mountain Test Facility, Weber County
40°47'05.3"N 111°57'17.5"W, ground station located at Air National Guard Base, Salt Lake City
40°56'59.0"N 113°05'00.1"W, ground station elevation 6,358' on Grassy Mountain, 40.949722, -113.083361, Tooele County
40°22'08.7"N 113°00'10.5"W, ground station elevation 6970' on Cedar Mountain, 40.369083, -113.002917, Tooele County
41°03'37.8"N 112°53'30.9"W, Transmitter site NE of Oasis on North Range, 41.06049, -112.89191, Box Elder County