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Pluragrotta
66°13′10″N 14°46′21″E / 66.21944°N 14.77250°E
Pluragrotta is a cave in Rana Municipality in Nordland county, Norway. It is the deepest cave in Northern Europe. Most caves in Rana, of which there are some 200, are not suitable for diving.
A popular cave diving destination, Pluragrotta attracts more divers than any other cave in Scandinavia. Visibility in the cave waters is high. The cave's passages were formed by the flow of the Plura river over limestone, and the cave system includes marble formations. A number of species have been identified in the cave ecosystem.
Diving became possible in Pluragrotta with the damming of lake Kallvatnet in the 1960s. There have been multiple injuries and fatalities among cave divers at the site, which is accessible year-round.
The damming of lake Kallvatnet in the mid-1960s greatly reduced water flow in the partially subterranean Plura river, making diving possible in the cave.
The first known dive in Pluragrotta was done by Svein Grundstrøm and Bjørn Fagertun in 1980. They are believed to have dived to 135 metres.
In 1987 a group of ten Norwegian divers started to explore the Pluragrotta's underwater cave system. Most of the divers were working as Fire brigade-officers in Oslo brannvesen and they did the exploration on their own time without sponsors. By 1997 they had surveyed large parts of almost three kilometers of the subterranean water-filled caves. Their work became known when NRK in 1997 aired a program about it in the series Ut i naturen (Out into the Nature) when seven members of Norsk teknisk dykkekrets presented the Pluragrotta on TV. They had the cooperation of S. E. Lauritzen at the University of Bergen who at the time was the only one in Norway doing professional research on the caves.
Exploration has been undertaken by two Norwegian diving organizations, with Norsk Teknisk Dykkekrets doing much of the early surveying and Reel Action Diving continuing the work since 2002. The cave has attracted Finnish divers in recent years, with rivalry developing between Finnish and Norwegian teams. Finnish explorers were the first to discover a connection between the two known entrances: Pluragrotta, and the nearby dry cave Steinugleflåget, in September 2013.
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Pluragrotta
66°13′10″N 14°46′21″E / 66.21944°N 14.77250°E
Pluragrotta is a cave in Rana Municipality in Nordland county, Norway. It is the deepest cave in Northern Europe. Most caves in Rana, of which there are some 200, are not suitable for diving.
A popular cave diving destination, Pluragrotta attracts more divers than any other cave in Scandinavia. Visibility in the cave waters is high. The cave's passages were formed by the flow of the Plura river over limestone, and the cave system includes marble formations. A number of species have been identified in the cave ecosystem.
Diving became possible in Pluragrotta with the damming of lake Kallvatnet in the 1960s. There have been multiple injuries and fatalities among cave divers at the site, which is accessible year-round.
The damming of lake Kallvatnet in the mid-1960s greatly reduced water flow in the partially subterranean Plura river, making diving possible in the cave.
The first known dive in Pluragrotta was done by Svein Grundstrøm and Bjørn Fagertun in 1980. They are believed to have dived to 135 metres.
In 1987 a group of ten Norwegian divers started to explore the Pluragrotta's underwater cave system. Most of the divers were working as Fire brigade-officers in Oslo brannvesen and they did the exploration on their own time without sponsors. By 1997 they had surveyed large parts of almost three kilometers of the subterranean water-filled caves. Their work became known when NRK in 1997 aired a program about it in the series Ut i naturen (Out into the Nature) when seven members of Norsk teknisk dykkekrets presented the Pluragrotta on TV. They had the cooperation of S. E. Lauritzen at the University of Bergen who at the time was the only one in Norway doing professional research on the caves.
Exploration has been undertaken by two Norwegian diving organizations, with Norsk Teknisk Dykkekrets doing much of the early surveying and Reel Action Diving continuing the work since 2002. The cave has attracted Finnish divers in recent years, with rivalry developing between Finnish and Norwegian teams. Finnish explorers were the first to discover a connection between the two known entrances: Pluragrotta, and the nearby dry cave Steinugleflåget, in September 2013.