Fiskumfoss Salmon Ladder

Fiskumfossen is a 34-metre waterfall on the Namsen, Norway's so-called Queen of salmon rivers. Before 1975, the falls were an impassable barrier; salmon could swim no further upstream. That year, NTE blasted a 291-metre fish ladder through the rock, making it the longest salmon ladder in Northern Europe. It has 77 pools that lift the fish from the base of the waterfall to calm water above, opening an additional ten kilometres of spawning river beyond the dam. Only the top 90 metres of the ladder are visible; the rest runs through a tunnel beneath the falls. Between July and October, up to 2,000 Atlantic salmon make the climb each year. The spectacle drew enough interest that the Namsen Laksakvarium was built above the falls, a small aquarium and museum where visitors can watch salmon, trout and the rare namsblank (a landlocked salmon unique to the upper Namsen) at close range. A nature and culture trail loops around the site with views down into the gorge. The Nedre Fiskumfoss power plant, which uses the 34-metre drop to generate around 300 GWh per year, is itself registered as a cultural heritage site in Norway's power-plant preservation database. It was built by NTE, the regional energy company founded in 1919, and represents the balancing act that defines modern Norwegian river management: extracting hydropower from the same waterfall that must also sustain one of Europe's great salmon runs.