Rjukan–Notodden Industrial Heritage Site

Historie

Rjukan–Notodden Industrial Heritage Site is a World Heritage Site in Telemark county, Norway, created to protect the industrial landscape around Lake Heddalsvatnet and Vestfjorddalen Walley. The landscape is centered on the plant built by the Norsk Hydro to produce fertilizer from atmospheric nitrogen. The complex also includes hydroelectric power plants, transport systems, including railways, transmission lines and factories, and workers' accommodation and social institutions in the towns of Notodden and Rjukan.The site was placed on the tentative World Heritage list on 19 June 2009 together with the Odda–Tyssedal Industrial Heritage Site. On 5 July 2015 it was placed on the World Heritage list, under Criteria II and IV, with following description of the Outstanding Universal Value:HistoryIn the 1900s, Norway experienced rapid industrial development through the availability of cheap hydroelectric power. Kristian Birkeland developed a method to extract nitrogen from the air, which, after an initial trial in Notodden in 1907, looked superior to existing technologies. Nitrogen was needed to produce fertilizers. Norsk Hydro was founded in 1905, and industrial development began in the Eastern Telemark region, previously an underdeveloped and underpopulated agricultural area. To produce fertilizers, it was essential to build factories, power stations, infrastructure for workers, as well as facilities for exporting the production. The fertilizers, artificial saltpetre, eventually surpasses the Chilean naturally mined saltpeter, at the time the most widely used fertilizer.