I added this mod to a save (also started another game with it), and neither games have mining patches getting scarred at all? I only have one scarred area which is around my uranium centrifuges, and it looks like possibly the start of mild scarring around some of my li-quarries.. Mildly confused. Is there a setting I forgot to enable?

They seem to be causing scarring now, not sure what fixed it, but it isn't over the mines? It seems to be over the conveyors and production facilities leading away from the mines, but little is under the mines themself. Is that intentional?

I have now found that everything scars. After removing a railway, I found that there was scarring under where the railway used to be, even though there were no mines anywhere nearby. Seems as though this mod is not doing intended things :(

+1 having the same initial issue - no scarring whatsoever. What did you do to cause scarring to start working? Are you by chance using other mods that affect the terrain like Dirt Path?