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Today Tyssedal appears like a classical industrial community, a picture of modern Norway from the turn of the former century until today. A/S Tyssefaldene was established in 1906, and on 1 May 1908 Tyssedal power station was put into operation. The work on the first stage of the facility was completed in a short time, with a work force of 500 men. They built water tunnels, regulation reservoirs, power station, penstocks, harbour, cableways, office buildings, houses and 6 km of power lines in the wild mountains above Odda to provide the new melting plant with power.
Valldalen or Valdalen, the name that the locals used in past times, had been a permanent settlement for a long time, and later the biggest mountain-farm valley in western Norway. Since that time there have been many changes: Most of the fields are no longer in use. Bjørkeskogen, a birch forest that had grown in the valley for thousands of years, took more and more over. And in the valley bottom, the Valldals dam now keeps the artificially large Valldalsvatnet Lake in place.