It probably should be told in a different fashion. This coal-pit had been there for several decades, and the wind-generators were placed at the outer-edge of the pit because it was ‘safe’ (allowable by local officials), when paperwork was first done.
No one says the age of the wind-generators...but generally, there’s only a 30-year life span allowed. So they would have come down...one way or another.
Taking them down is the easy part...disposing of the blades, tower and base is another matter.
Wyoming graveyard for Windmill blades and towers
And the base...this is what's left, windmill base under construction: