Plongée souterraine à Rana
Des grottes de marbre froides juste au sud du cercle polaire, près de Mo i Rana : Pluragrotta (fil principal vers ~-20 m, partie profonde jusqu'à ~-130 m) via le centre de plongée Plura Valley, sa seconde entrée rarement plongée, Steinugleflåget, et Litjåga, plus étroite. Eau à 1–7 °C, visibilité jusqu'à ~100 m en hiver.
3 grottes · jusqu'à 135 m · 1 à la portée d'une équipe Intro
Les descriptions des grottes sont pour l'instant en anglais.
Les 3 grottes
| Site | Prof. max. | Type | Brevet |
|---|---|---|---|
| Litjåga | 22 m | Sidemount | Full cave |
| Pluragrotta | 135 m | Backmount | Cavern |
| Steinugleflåget | 132 m | Sidemount | Full cave |
Les brevets requis, les configurations et les profondeurs trimix sont des estimations destinées à la planification. Vérifiez-les toujours sur place et plongez dans les limites de votre formation.
Infos pratiques : règles, gonflage et numéros d'urgence
Urgences
- Call 113 (medical) and ask for the on-call diving physician ('dykkerlege'); 112 police. In April 2024 an air ambulance and a rescue helicopter came to the cave; in 2014 the police brought in foreign cave divers for the recovery attempt, which was judged too dangerous. Rescue in dry caves (relevant for Steinugleflåget and Litjåga's dry sections) is done by volunteers of Norsk Grotteforbund. No mobile coverage at the cave.
- Hyperbaric chamber: emergency treatment at three Norwegian hospitals. The closest (~410 km in a straight line) is UNN Tromsø, University Hospital of North Norway, Hansine Hansens veg 67, 9019 Tromsø (switchboard +47 77 62 60 00). Further away: Haukeland, Bergen (Konrad Birkhaugs hus, Jonas Lies vei 79, 5021 Bergen; 24/7 diving-medicine on call via 113; switchboard +47 55 97 50 00) and Oslo University Hospital Ullevål (Kirkeveien 166, building 4, 0450 Oslo; 24/7; switchboard +47 22 11 80 80). DAN Europe +39 06 4211 5685.
Accès et règles
- Access: Pluragrotta is on private land of the Jordbru farm; the owners run the Plura Valley dive centre (Plurdalsveien 1495, 8615 Skonseng; +47 908 83 370). Check in beforehand (their checklist asks for 'permission to dive'); one undated source mentions 500 NOK per day for infrastructure and parking. Plura Valley rules: no solo diving, certification matching the dive, CCR only with a CCR cave certification and unit certification, OC bailout from the furthest point, minimum age 18 for technical and cave diving.
- 2014 police ban: after the February 2014 accident a temporary ban on entering (the affected part of) the system applied; lifted on 31 March 2014. Diving is allowed today via Plura Valley.
Gaz et gonflage
- Gas: Plura Valley fills air, nitrox (continuous blending) and O₂; trimix according to a 2024 report — ask. In Mo i Rana the club Rana Sportsdykkere has a compressor (air; ask about visitor fills). Bodø Sportsdykkerklubb (~3 h drive) lists air, nitrox and trimix (club — ask).
Eau et saison
- Water and season: 1–7 °C (warmest in August); visibility usually 30–50 m, in winter up to ~100 m, less after heavy rain or during snowmelt. Plura Valley is open all year and winter is peak season; the pool then freezes (a hole is cut). Night frost as early as August. Drysuit with heating.
Sécurité
- NGDF guidelines: do not dive beyond your certification or experience, at least 3 lights, helium deeper than -39 m, and change permanent lines only in consultation with NGDF.
Sur la route et aux alentours
- Road: from Mo i Rana take the E6 to Skonseng and turn into Plurdalen (~36 km): ~30–35 min of tarmac, then ~5 km of rough gravel; no mobile coverage for the last ~2.5 km. Snow can lie until June. Litjåga is ~0.5 km from the E6 in Dunderlandsdalen; in winter through deep snow (snowmobile). Mo i Rana has an airport (Røssvoll, 10 km north), the Nordland Line railway (Trondheim–Bodø) and the E6.
Jour de repos
- Dry caving: Jordbrugrotta, 3.5 km upstream in Plurdalen, is a wild cave with a lot of water (a rubber boat is needed in places) — only with caving experience and the right gear.
Planifiez un séjour de plongée souterraine à Rana
Saisissez votre équipe, avec brevets, gaz et configurations, et voyez tout de suite quelles grottes vous conviennent. Avec les temps de route depuis votre hébergement, les stations de gonflage et un instructeur IA qui réfléchit avec vous.
Compiled from web research (Norsk Grottedykkerforbund, Plura Valley, Visit Helgeland 2025, MoiRana.com 2023, Waterpixels 2025, OFDS 2018, Dive Rite 2020, Scubago, Cave Database, Life in Norway 2023, Fædrelandsvennen 2014, VG 2014 and 2024, Dykking.no 2024, DAN 2024, SukellusLuola 2010, TekDiveUSA, dive-scuba.com, InDEPTH, GUE.tv, Suunto 2016, DIR-NO 2003, Wikipedia, OpenStreetMap via Mapcarta, Helse Bergen, Oslo University Hospital, UNN, Indremedisineren 2025, Norwegian Diving Federation, FORF/Norsk Grotteforbund; Sept 2026). Pins from OpenStreetMap, checked against NGDF's coordinates for the farm; Litjåga has no pin. ~ = estimate. Rules change — check locally.