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.
Nyhamna Gas Plant
Ormen Lange is around 65 miles west of the gas plant. The field was discovered by Norsk Hydro in 1997. The wells were drilled by the ship "West Navigator". The operation of Ormen Lange was owned 18% by Norsk Hydro, 17% by Norske Shell, 36% by Petoro, 10% by Statoil, 10% by Dansk Olie og Naturgas, and 7% by ExxonMobil (Esso). Ormen Lange is Norway's second largest gas field.