Hi,
The overflow from Py Tailings pond (tar in my case) randomly destroy assets from both this mod, and the transport drones mod.
If the ground pollution casued by the spill reaches either the minig depo or any trasnport depo, they get destroyed.
I suspect the pollution overwrites the 1 tile road that these building have and that causes them to be removed.
I never witnessed it happening, but multiple times when I went by I notcied the depos missing around the spilled pond.