The Hunder trout is bred at the Hunderfossen waterfall on the Gudbrandsdalslågen river, by the 280-metre (920 ft) long power station dam. Next to the dam, there is an outdoor exhibition centre for hunder trout. There is a hatchery on the west bank; it produces 20,000 hunder trout every year and releases them into the river to compensate for the loss of fish and of spawning grounds when the power plant was established.[5]