"Paul-Berndt-Halde" is a pile of waste rock and coal flotation tailings of the Queen-Carola-Colliery (1872—1959) in Freital, which was renamed into Paul-Berndt-Colliery (1948—1959). Dead rock is pyrite (FeS2) which caught fire itself and set on fire the flotation tailings of the Doehlen coal washer. The extent of the conflagration in early 2014 was unexpected by the experts. To fight the fire, water was sprayed, and caused the white vapour beneath the fumes.