THE CHIMNEY AND THE CORKSCREW AT PAMUTUANAN CAVE

pamutuanon

This article is a follow-up on the article “New Underwater Cave in Lianga, Surigao del Sur” written by FCD Jake Miranda. The article relates to the cave diving expedition (Pamutuanan Cave Diving Expedition I) conducted by the 2-man team of FCD Jake Miranda and guest Ivar Almjhell, a series of two dives, the last one pushed solo by Almjhell to a total distance of 450 meters.

This FCD expedition, Pamutuanan Cave Diving Expedition II, was held on November 10, 2013 by a team composed of Jake Miranda, Lyndon Cubilan, Andy Berame, Larry Williams, Clint Sia and Doc Amores. The mission was to push beyond the tie-off point of Pamutuanan I.

As noted in Pamutuanan I, the dives were in and out of total water immersion ending in the final tie-off point in a blind chamber. Pamutuanan II pushed beyond this point.

Pushing beyond the chamber, we entered a small crack sideways on sidemounts. One chamber was explored. At first glance the chamber appeared to end up blind. Luckily, FCD Jake Miranda thought of giving a second look and found an access to another chamber in shallow area. The team of FCD’s Andy and Doc pushed this line with FCD Lyndon tagging along doing the video. This led to a very unique cave formation beginning with a chimney, a perfectly hewn vertical tube of about 3 meters, leading to a spiralling cavity down to a depth of 25 meters (at which point Doc’s line ran out). The following graphics speak a thousand words on the dive:

Pamutuanan push

Fig 1. Schematic of the Pamutuanan II push. (click on the image to get the full view)

Pamutuanandiveprofile

Fig 2. The dive profile downloaded from Doc’s computer (click on the image to get a full view)

With this finding, Pamutuanan Underwater Cave will end up as a must-do cave dive in the Philippines. The combination of a vertical chimney leading into a corkscrew will no doubt intrigue and attract divers from all over. This is a sidemount diving cave, which leads to the logistical problem of surface swimming with up to 4 tanks for some 400 meters. Arrangements are in progress of having the locals shuttle the dive equipments to a staging area deep into the semisubmerged cave system.

DSC_8613

Fig 3. The mouth of Pamutuanan Cave right next to the main highway on the border between Lianga and Barobo, Surigao del Sur.

Article by:

Dr. Alfonso Y.  Amores

Dr. Alfonso Y. Amores

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