The Speleological expedition „Lukina jama 2010“ was held between 24th of July and 15th of August 2010.
It was organized by Speleological section Velebit and the Speleological Committee of the Croatian Mountaineering Association in cooperation with Northern Velebit National Park, with logistic support of The Croatian Mountain Rescue Service (CMRS).
Around hundred of speleologists from 14 Croatian speleological clubs and associations participated in the expedition as well as colleagues from Bulgaria, England, Slovakia, Czech Republic and Spain.
This was one of this year’s most challenging expeditions in Europe given the logistics and large amounts of equipment transported to the bottom of the pit in conditions of low temperature and significant water activity.
The expedition resulted in cave diving in the lake at the bottom of the pit, in new speleological topographical maps and scientific research which includes studies of the subterranean fauna, hydrogeology, physical, chemical properties and other characteristics of the pit.
Cave divers and members of the Speleological section Velebit as well as CMRS, Ivica Ćukušić and Robert Erhardt, dived into the submerged passage at the bottom of the dry part of the pit for 135 m in length and 21 m in depth, increasing the overall cave depth to 1400 m and more.
During the expedition, well known Croatian cave diver and member of Speleological section of HPD Željezničar as well as Croatian Biospeleological Society (CBSS), Branko Jalžić, dived into the submerged passage at the bottom of the pit at 40 m in depth.
New overall cave depth is now 1421 m, which makes it the 15th deepest cave in the world.