It's been since 2006 I been diving Oliero, it is quite an impressive power cave. I felt concern how could it be possible that probably the most visited and largest Alpine cave system did not had a grade 3 map.
So I talk to my friend Alessandro Fenu about it and when I ask him to join me is this mapping endeavour he simply said : Ci Sto! We agree was a quite a challenging task to survey the over 5km of explored passages as most of them hold an average depth of 50mt and max depth of about 70 mt . Specially cause the original line has not length markings what so ever, is damage, broken or missing and will have to be replace or redone. However exciment build up quick as we realized that discovery and exploration of new passages is certainly a possibility.
So Sunday 18th of November I invite the local cave diving community to assist to a Survey workshop with 2 goals in mind.
First introducing the survey techniques use in Mexico Cave systems to produce grade 3 maps and second to create a survey team that could support deep long range rebreather dives in the 7- 9°C water, which will be necessary to make this a reality.
The workshop run smooth and all attending quickly realize the commitment require to ad this responsibilities to any dive. Everybody was willing to give it a try in the water and in fact we decide to start right on the spot! So some of the workshop participants form 3 teams to survey the “shallow section” of Cogol di Siori. The teams gather enough information to create a 3D map from main entrance to the bedding plain called "laminatoio".
Other objective was to find a better route to by pass the tight laminatoio with long range cave diving gear, we found one bigger and shorter and call it the “shortcut” . While in this search process we visit also a fracture tunnel, also call “laminatoio verticale”, so there are actually 3 possibilities of circuit in the Oliero cave shallow section. The fracture area is not recomended in heavy flow.
Here are some preliminary maps we hope you enjoy them as much as we did in making them and expect Oliero cave system to display a grade 3 map in the near future.
The green ones are diferent views from the 3D tunnels, the color one is a depth scale and in the white is provisional top view map. (click to enlarge as usual)
Survey Team
Team 1 Carmelo Fasci, Simone Iaria & Massimiliano Canossa Team 2 Holger Kiesl & Clemenzo S from Austria Team 3 A. Fenu & Nick T
This Pictures are copyright from nick-toussaint.com and the Oliero Cave Survey Project team. Please if you copy them must give proper credit to the hard effort of the team and notify us here
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Alberto Parolini 1st Explorer of the Oliero Cave System