Resurgence
Pluragrotta – Plura resurgence pool
Pool and cavern zone (separate line): NGDF guidance [1] (NGDF says divers without cave training may dive the pool or the cavern zone with an experienced cave diver; the cavern zone has its own line.). These categories are the named scheme's own; they describe the training a site calls for.
The main diving entrance to Pluragrotta: a pool where the underground Plura river reappears near the farm Jordbru, about 200 m from the Plura Valley dive centre. A lined cavern zone leads into very cold, clear cave passage.
The Plura river resurges in a pool near the farm Jordbru in Plurdalen. A resurgence is a spring where an underground river returns to the surface; divers swim against the outflow into the cave. The pool and the first part of the cave form a cavern zone with its own guideline (a fixed line divers follow so they can find the way out).
An air chamber, called the Chapel by the local dive centre, lies about 450 m inside, and most of the route to it can be seen within roughly 30 m depth, according to NGDF. Deeper side passages and the deep run towards Steinugleflåget are reserved for experienced technical cave divers.
The Plura Valley dive centre sits about 200 m from the entrance with accommodation, a shop and gas fills.
The environment
Cold river water from about 1.5 °C in winter to 7 °C in late autumn, usually very clear, in river passages with jumps (side lines) to side passages. Visibility can drop to a few metres during May snowmelt.
Conditions
Seasonal snowmelt in May reduces visibility to 2-3 m; late winter and early spring bring the clearest water (dive centre figures).
Typical ranges from published sources, not current conditions.
Facilities
Dive centre about 200 m from the entrance with accommodation (20 beds), shop, lounge, sauna and gas fills; guided packages include air, oxygen and nitrox, with helium charged separately.
Other entrances to Pluragrotta–Steinugleflåget system
For orientation, not navigation. Hollow dots are approximate.
Every fact on this page, with its source (10)
| Fact | Status | Source |
|---|---|---|
| The river sinks at the Trollkjærka collapse and resurges in a pool about 200 m from the farm Jordbru; the dive centre is about 200 m from the entrance. | Verified | [1] |
| Most of the route to the air chamber, about 450 m in, can be seen within just over 30 m depth.NGDF Norwegian text gives about 450 m; the dive centre places the Chapel air chamber about 450 m into the mountain. | Verified | [1] [2] |
| Non-cave-trained divers may dive the pool or the cavern zone, which has its own line, with an experienced cave diver.Association guidance. | Verified | [1] |
| Water ranges from about 1.5 °C in winter to 7 °C in late summer and autumn.NGDF gives 3-6 °C. | Reported | [2] |
| Visibility is about 35 m most of the year, around 100 m in March-April and 2-3 m in May.Provider claim. | Reported | [2] |
| The police access ban on the Plura caves was lifted on 2014-03-31. | Reported | [4] |
| Guided packages include air, oxygen and nitrox, rental tanks and accommodation; helium is not included.Provider claim; no prices published. | Reported | [2] |
| Plura Sleep offers 20 beds year-round next to the cave entrance. | Reported | [3] |
| Divers without cave training may dive only the pool or the cavern zone, accompanied by an experienced cave diver.NGDF guidance, not a legal rule. | Verified | [1] |
| The Plura Valley dive centre beside the entrance is mapped at about 66.282 N, 14.732 E.From the regional tourism listing; area precision because the entrance is about 200 m from the centre. | Verified | [3] |
Verified: stated by an official or primary source we opened. Reported: from a secondary source only. Sources conflict: the note gives both versions. May be out of date: the newest source we found is old.
Written in our own words from the sources above. Report a correction