maxanin, Of course, the site has already been declassified, and most likely most of it was used as "local fuel," while the rest was destroyed by those in need. They filmed a movie in the fortress, built it, filmed it, burned it, blew it up, and apparently it's all been torn down.
http://fertilizermods.elteh.org/panorama/trash/6907_panorama.html
Only the yellow building is real.