I filmed this location March 2018 but I actually stumbled across this facility 2 years ago while bush hiking. Back then the road was over grown and fenced off at the bottom of the hill and still is now.
It seems to be at one point a radio station and also the taller towers seem to be for telecommunications.
There is a possibility the tall tower is still in use but the facility is run down and has been vacant for a long time by the looks.