Kongsberg Silver Mines
The silver mines of Kongsberg, in Buskerud county in Norway, constitute the largest mining field in Norway, with over 80 different mines. It was the largest pre-industrial working place in Norway, with over 4,000 workers at its peak in the 1770s and supplied over 10% of the gross national product of the Danish–Norwegian union during its 335-year-long history: over 450,000 man-years were expended in the production.
Mining in Sweden
The Kiruna Mine, the largest iron ore mine pit in Europe, plans to expand operations in the future. The nearby town of Kiruna would be endangered, however, if iron ore is extracted beneath it, which would cause instability in soil and building foundations. In order to resolve this problem, the mining company LKAB plans to move the entire town with its 18,000 people to the east.