Doubs and Jura · about 7 km from Morteau
Source du Pont du Diable
- Max depth86 m
- CertificationFull cave
- SpecialExperienced divers
Diving and fills
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Fills nearby
- Fill stationDiveStation (Neuchâtel, Zwitserland)Air, nitrox and trimix up to 300 bar; nitrox and trimix only during opening hours. O₂: ask.Route ↗
- Fill stationplongee.ch (Puidoux/Rivaz, Zwitserland)Air, nitrox, heliox, trimix, O₂ and helium; 200 and 300 bar outletsRoute ↗
- Fill stationNemo Tauchsport (Heimberg)Air, in the shop and 24/7 at the outdoor fill station (with a Nemo fill badge); nitrox only in the shop, price on requestRoute ↗
The dive
The water is clear at the start, but your bubbles dislodge organic matter. The -86 m was reached on mixed gas in 2002 by a local team. A GSD team later laid 300 m of line and spent over 2 h underground.
Profile and sections
The water is clear at the start, but your bubbles dislodge organic matter.
The -86 m was reached on mixed gas in 2002 by a local team. A GSD team later laid 300 m of line and spent over 2 h underground.
- Depth and profile
- S1 ~30 m / -6 · S2: corroded passage with a yo-yo profile · then a shaft to -86 m (reached in 2002; according to local clubs the deepest flooded network in the Doubs)
- Configuration
- Trimix needed for the shaft. A closed-circuit rebreather is preferable: exhaled bubbles dislodge organic matter from the ceiling and reduce visibility, including for the way out. No data on passage size; club divers used small cylinders (9 l and 4 l) and CCR.
- DPV: Not DPV-suitable (estimate)
- Short sumps and a deep shaft: no gain from a scooter.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Configuration unknown — research beforehand
- Goes down to 86 m (trimix or deco may be needed)
- Experienced divers only
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Beside the Pontarlier–Morteau road, just past the Remonot cave chapel. Short descent to the spring; in snow a club team used a rope.
Around Source du Pont du Diable
Fills3 fill stations · nearest 31 km
DiveStation (Neuchâtel, Zwitserland)
Route de la Pierre-à-Mazel 4, 2000 Neuchâtel, Switzerland
Air, nitrox and trimix up to 300 bar; nitrox and trimix only during opening hours. O₂: ask.
Tue–Fri 9:00–12:00 and 13:30–18:30, Sat 9:00–16:00; air station 24/7 (subscription: ask)
Dive shop with a fill station; formerly the Neuchâtel branch of plongee.ch. The nearest known trimix address. CCR supplies (sorb) and walk-in fills for visitors: ask.
plongee.ch (Puidoux/Rivaz, Zwitserland)
Route du Verney 18, 1070 Puidoux, Switzerland
Air, nitrox, heliox, trimix, O₂ and helium; 200 and 300 bar outlets
Mon–Fri 9:00–12:00 and 13:30–18:30, Sat 9:00–16:00; air station 24/7 for subscribers
Dive shop in Puidoux (Rivaz); one of the most complete gas lists in the area. Air-station subscription CHF 180 a year (couple CHF 290); air CHF 6–12 per cylinder, +CHF 2 for 300 bar. Walk-in trimix fills for visitors: ask.
Nemo Tauchsport (Heimberg)
Stationsweg 7 (Zentrum Lädeli, 1. UG), 3627 Heimberg, Switzerland
Air, in the shop and 24/7 at the outdoor fill station (with a Nemo fill badge); nitrox only in the shop, price on request
Mon 18:30–19:30, Tue–Thu 17:30–18:30, first Saturday of the month 9:00–14:00, other Saturdays 9:00–12:00; other times by appointment. Outdoor fill station (air) 24/7.
Dive shop and PADI school in the Zentrum Lädeli shopping centre (by the Aldi, first basement level) in Heimberg, near Thun. Air CHF 10 per cylinder; only cylinders with a valid Swiss test. The outdoor fill station needs a fill badge: ask in the shop.
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