Last time I was up at the Sweetwater site above Bridgeport, they were set up like that. I'm pretty sure I have a photo of the site somewhere, I'll have to dig around for it.
Extensive solar array and a large LPG tank farm. At the time there was at least one cell carrier up there, as well as a lot of state owned stuff. I was there in the spring, and it wasn't easy to get to. Would require a snowcat in the winter.
Just down the trail a bit, the USMC had some equipment to cover their mountain warfare training center across the valley.
I worked on the Bridgeport Ranger District for 7 years in the 1980's and administered special use permits, which includes electronic sites. Sweetwater was an unknown site, with only the TV district and a data link for snow measuring sites for the Natural Resource Conservation Service. I couple of hams came in my office one day and told me they did a little experimenting and put someone with a 70cm handheld at the site and another in a vehicle that drove from the Nevada state line to Conway Summit and did not find any blind spots, including in the Walker River Canyon. I had already been up there and could tell, just by sight, that this was as good location. I wondered why no one was using the site. A couple of years later CHP and Caltrans came in my office and told me they wanted to apply to establish a new site that would cover blind spots in Walker Canyon. They showed me the location and it was on the east rim of the canyon. I told them they would have to prove that existing sites would not cover the canyon and that Sweetwater was already a designated, surveyed and platted site. They said they knew nothing about it. So they left my office and got busy. They were back that afternoon and said they had no blind spots on 800 MHz and 42 MHz. We went up there and they picked out a lot or two. There are rock outcroppings that divide the site and their lot had no access via the existing route, which was located on the north slope of the knob. I told them a road on the south side had already been approved in the site plan. It was easy enough that I could go out with a clinometer and stake out the road to the right grade and location. They sent up a small dozer while I was there and we built a short road that allowed access to all the lots and eliminated the need for one on the north slope. The rest is history and now there are a lot of users up there. The BLM Bishop Field Office has a repeater up there, the Humboldt-Toiyabe put one up there last year and the Inyo NF put one up several years ago. It is right around 55 miles line of sight from my house in Mammoth and with a rooftop antenna I can pick up Caltrans on 800 MHz. This allows me to hear what the road conditions are from the NV state line to south of Bishop (via their Conway, Crestview and Silver Peak sites).
I was later asked, when I was on the Bridgeport RD, to write the electronic site management direction for the forest plan. No one else knew enough about it, including the radio techs, to write management direction for them. The radio techs knew the sites the USFS were at, but I had driven or hiked to most of them on the forest, including central Nevada. It was fun to do this writing as I had enough knowledge of how these sites work to be able to contribute. It also seemed I was the only employee that had used the Inyo, Stanislaus and Yosemite NP radio systems while traveling our wilderness area, the Hoover, which borders each of those jurisdictions. It is great country with very impressive topography that can't be appreciated from the roads. I covered a lot of it both on foot and by horseback. I flew over most of it in a helo doing winter snow melt recon trips and a couple of SAR missions.
