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Dive #410 · Friday, 26 April 2019
Résurgence du Trou Madame
Cénevières, Lot The Quercy causses
- Day 6 of 6 · Quercy causses Apr 2019 →
- longer than 84 % of all dives
- Max depth
- 7.9 m
- Avg depth
- 4.4 m
- Bottom time
- 71 min
- SAC
- 16.4 l/min24 L · 230→160 bar
- Visibility
- ~10-15 (upstream, hazy)
Kit
- Gas
- Nitrox 32 · measured 30 %
- Cylinder
- D12
- Pressure
- 230 → 160 bar
- Mode
- Open circuit
- Course / purpose
- C10
Where
Résurgence du Trou Madame
Fed by the Charlan sink at Vidaillac, established by dye trace — the outlet of a system whose input is fifteen kilometres away across the causse.
Dive 1 of 6 here · first 2019 · last Sept 2024
With
On the map
Trou Madame survey
No route marked
- Entrance
- End of line
- Air
- Depth
- Along the line
Plan: 50 bar penetration; standard gear + reel. Erik did not come because he was not feeling fit. Saskia and I braved the climb at the entrance. We did not know where the main line started so took a reel. I found it exciting that a stretch at the entrance is siphonal, but underwater it was clearly marked. It is a low dark tunnel with a lot of fine silt, meandering at a steady pace. I tried to keep the pace low. There was a small twist before the 200 m point; there is also a "blind" jump here. After 450 m it got much narrower and felt like diving through a crack. Turned after 500 m. On the way back saw that the blind jump goes around a pillar and starts close to 150 m. Team: Saskia "Let us book a new week soon =)"; Erik (support) "Always happy to support :)"