Primož Jakopin, photo diary

Radošca 3 Cave Worksite
New site, new hope

January 4 2024, 15 pictures

          Most images are approximately 768 x 1024 pixels in size, numbers in front of the picture descriptions are serial numbers of the original photo files. With participation of Metod Di Batista, Marjan Juvan - Manč, Marjan Baričič, Marko Vogrič - Mare and Neja Kramer (his granddaughter), Andrej Puc - Fofr and Maksim Košir - Ičo.

          Page, texts and photos copyright (c) Primož Jakopin - Klok 2024.
 

Radeščkova udornica caves

          Quite a few Radošca cave instances slowly emerged during this diary and to avoid confusion and clarify the matter the author decided to wrap it up in the following observations.
          The Rado Radešček Collapse Doline (Radeščkova udornica in Slovenian) is named after one of the most enthousiastic diggers of the terminal passage in Najdena jama in the winter 1962/1963. Clearing it was a breakthrough which transformed Najdena from a 200-meter cave to the principal cave of the area nowadays, with the length of 5 kilometers. The doline is located 150 meters NNE from the Najdena jama entrance, on the surface it is about 30 m long and 20 meters wide and spreads more or less in the Dinaric direction (here ESE to WNW). According to data, available to France Šušteršič, doline is even less distant to Najdena jama tunnels, it comes to within 60 meters horizontally (NNE) and its bottom to 40 meters (above) the Kamin naših cen (Chimney of our prices), right center in this map. Moreover, after findings by Šušterič, the main wall above the doline bottom follows the WSW-ENE oriented geological fault, the same fault observed at Kamin naših cen in Najdena jama (the wall in the background of this photo).
          Doline was known, admired and often visited by Rado Radešček, and was therefore named in his memory by the veteran section of DZRJL, Ljubljana Cave Exploration Society. The main driving force behind this naming was the late Janez Kanoni - Žan.
          Radeščkova udornica has several winter blowholes (patches of the surface where the snow melts quickly in the winter), indicators of hollow (cave) space below. Four of them have now been excavated. Chronologically it all began in the year 2009 with Radošca (cave registry number 11916, in further text named Radošca 1) in the eastern corner of the doline's edge, abandoned in 2011, followed in 2011 by the Skrivni vhod mame Luše (SVML, Secret Entrance of Mom Luša - pron. Lusha, in memory of his late mother), in the middle of the SSE-SSW side doline wall; the worksite was abandoned the same year. In 2016 excavation in Radošca 1 resumed, and was abandoned for the second time in 2019 in favor of digging in Radošca 2, at the bottom of the collapse, below the highest (6 meters) wall, in the middle of the WSW-WNW doline side. In December 2023 digging in Radošca 2 was abandoned, in favor of Radošca 3. Its entrance is 3 meters to the SSW and 2 meters below Radošca 1.
          Radošca 1 was first excavated by Jernej Petrovčič - Jerko and his team (Peter Japelj - Pero and Janez Kanoni - Žan) between June 18 and 20, 2009. At the beginning it was named Plahutalnik (the Flutterer). The excavation proceeded sporadically till the length of 12 and depth of about 6 meters, reached in the summer of 2011, when the worksite was abandoned.
          SVML was discovered early in 2011, on a cold winter day, during the search for hot spots in Lanski vrh with a thermovision camera, by Jožek Košir - Cox. In the spring of 2011 digging started by Jožek Košir - Cox's team (including Gašper Košir, Cox's son, Herman Brvar and, a few times, the author of these lines). One of the field trips is documented in this video. It is 11 minutes long and was made by the author. At the end of the summer further work was abandoned. The length reached was 12 meters, at a depth of 5 meters.
 


 
Galacijevka Cave Ghost, from the color composition by Primož Jakopin, 2016-2017
 

          The veteran section of DZRJL was, in earnest, established after the watershed lecture in December 2014, titled Lipertova jama - research and findings in the last year (Lipertova jama - raziskave in odkritja v zadnjem letu). Four not-so-young reputable members of the society explained their views to the solving of the 100-year old puzzle, where to search for the long-lost pearl of Central-Slovenia karst. The generation of society members, most active in the late sixties of the past century, has come into retirement age, into their mid-sixties. It was high time to embark on some cave exploration project which would not be top-notch and bone-breaking, but would still produce tangible results. The area of operation was known - Lanski vrh in general, surroundings of Najdena jama in particular and the intensive brainstorming established Galacijevka, cave registry number 3472, as the excavation site. The cave, in the vicinity of Najdena jama and so of Lipertova jama, too, was developed from a blowhole into a 20-meter deep cave by DZRJL in 1970 and ended with a very drafty passage, too narrow to pass. From January to May 2016 a team of 23 participants, some more active, some less, managed to break three narrow sections of the cave tunnels, in 20 field trips, to reach - not the elusive Lipertova jama, but the bottom of Mihlerjeva štirna (Michler's fountain) in Najdena jama. The famous cave got its third entrance. In the spring of 2016 the veterans also built a shelter in the vicinity of Najdena jama, a wooden shack with a large table and benches around it, with a wood burning stove and a kitchen corner. It served as a base for all the further work, and was especially useful in the winter and in case of bad weather. It made coming to or from Najdena jama, changing clothes into caving gear and vice versa, having a snack before and after cave action, a pleasant experience. Lanski vrh obtained a home you always like to return to.
          The achievement of a lifetime did not quite materialize in Galacijevka but the result was very encouraging and Jerko's excavation site in Radeščkova udornica, abandoned in 2011, was chosen as the next project. From the summer 2016 to the end of June 2020 140 field trips took place and Radošca 1 achieved 27 meters in length and 16 meters in depth. On June 21, 2017, the 46th excavation day, the tunnel has hit the Radošca collapse. Strong draft, present all the way down from the entrance to this point, ceased to be concentrated in one direction. It dispersed in the collapse, the continuation tunnel, dug between the solid wall and the collapse, had little to no draft. After further three years of work the opinion settled in that any further efforts in Radošca 1 would be in vain.
          The survey of Radošca 1 showed that the cave crawled below the main wall of the Radošček collapse doline, on its western side. The place below the middle of the wall is also the deepest point of the doline itself. So why not to try the luck at this point? There was no draft, no blowhole, but the idea was so tempting that the new, third excavation site, Radošca 2, was opened here, in June 2020. After Radošca 1 and SVML, both close to the doline top. The works proceeded till December 2023, to the depth of 23 meters. Horizontal distance is small as the excavation shaft spiralled down between the (never ending) western wall and the collapse. Mine-like supports, in the form of spruce beams and 5 cm thick spruce boards, connected with 25 x 4 mm galvanized earthing iron strips were installed to keep the collapse rocks in place.
 


 
View from the bottom of the cave up the excavated pit, August 3, 2023
 

          There are several steps between the shaft sections which made the hauling up of excavated material more difficult, as it required that the steps be manned to help the bucket on the rope pass through, a larger digging team. Any side chamber or, better, side tunnel, would be a great relief as it would provide space for the badly needed depot. But there was none. The age of participating veterans also increased, from mid 60s to mid 70s, one of us, Marjan, part of the 4M skeleton crew (Metod, Manč, Marjan, Mare) surpassed the 80-year mark some time ago. But there were also bright moments. Probably the most remarkable was the discovery of elk or wapiti (Cervus canadensis) antlers in May 2022. Manč stumbled upon them at the depth of 12 meters during the digging and, remarkable as it is, among all the big and mighty rocks the antlers and the elk's forehead were mostly intact. Senior researcher Irena Debeljak from the Ivan Rakovec Institute of Paleontology, part of the Research Centre of the Slovenian Academy of Sciences and Arts, determined the deer family (long ago extinct in Europe) and approximate age, between 26.500 and 11.500 years.
 


 
Wapiti antlers, May 18, 2022
 

          Early in December 2023, Marko Vogrič scanned the surface area above Radošca 1 with a thermal camera and discovered a new hot spot. In two "single" actions, he excavated the entrance to a room from which the strong current of air was coming, with a "cave" temperature of 9 degrees C.
          As already stated, the entrance is 3 meters to the SSW and 2 meters below Radošca 1. Radošca 2 worksite was abandoned and on December 14 the whole DZRJL veteran's team started to work at the new site, named Radošca 3.


 

Radošca 3, January 4


 


 
53203. Mare's dog Aska, of Alaskan Malamute breed






 
53204. View to the west across the entrance towards the cave Radošca 2, across the Radešček collapse doline, in the upper center is the awning that covers the entrance to Radošca 2






 
53205. View from the south across the entrance to Radošca 3 with Marjan, the rock in the upper middle is above the entrance to Radošca 1.






 
53206. Metod in the cave entrance






 
53207. View from the bottom of the entrance step towards the surface, Marjan






 
53208. View from the passage to the next pit towards the entrance bottom






 
53210. View from the same point into the deep where Metod is widening the passage to the continuation.






 
53209. Metod with a drill, closer view






 
53211. There is only room for two on the worksite (currently Metod and Manč), the others are gathered around the entrance: Mare, Marjan and Neja.






 
53212. View of the entrance from below, Neja and Mare






 
53213. Neja in the entrance of Radošca 1






 
53215. View from the path towards Članska vas to the south, with Planinska gora and the sun






Related pages:


 



 

  Križna jama, January 1, 2024     Skednena jama and Pod stenami, January 11 and 13, 2024  
 


 


This page, text and photos by Primož Jakopin, member of the Ljubljana Cave Exploration Society (DZRJL). Send inquiries and comments to primoz jakopin guest arnes si (insert dots and at sign as appropriate). Page initiated on January 18, 2024, expanded several times up to January 23, continued on May 4; date of the last change: May 8, 2024.

URL: https://www.jakopin.net/primoz/slike/2024/PJ20240104_en.php
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