The crazy boxes of lines look like they could be mock ups for streets in a city. It would be interesting if they corresponded with an actual street layout somewhere in the world. Probably used for training armored vehicles. I did notice that what is at 40.457985,93.369799 looks a lot like a scale model of a region. A lot of militarys have used scaled regional models to train tank commanders.
The massive grid-lines look like Dugway Proving Grounds in Utah, where the US tested chemical weapon dispersion, the same could be true for the lonely island of foliage and the reservoir.
The antenna structure looks a lot more like an electrical substation without any equipment installed. I have one that looks like this near my house. It was built with the expectation that there was going to be a huge growth in the area, then the housing market crashed and, well...
Others are obviously targets for training pilots or artillery. There are also several mock runways in the area that have craters in them also. The circular target looks like it is to test the dispersion of some kind of cluster munition.
Well, that is all for my armchair intelligence observations.