Turns out that some of those old buildings are tougher than they look. I remember Zip feeds from the farm I grew up on. You could find the empty bags in all sorts of unexpected places roofs, chicken coops, etc. years after the stuff wasn't sold in our area. In a weird anthrpomorphic way, it's nice to see the old mill had some fight left in it after all.
Update: there was also video of the demolition at the Argus Leader.