https://unilib.phaidrabg.rs/o:1062 Abstract: Within this paper, an overview of the construction of tunnels in karst terrains is given from detecting various unfavorable conditions, monitoring, testing, analyses, and adapting to actual conditions on the ground. In karst conditions, fault-cavernous mediums can be filled with crumbly, clayey matter, and water. Such phenomena represent serious risks during tunnel construction in terms of excavation collapse, damage to the machines, slowing down, and, in some situations, suspension of work on the tunnel route. All these phenomena lead to significant economic consequences during the construction of tunnels. The paper presents different concepts of predicting and adapting to different conditions that can occur in karst and that can be prevented or remedied. In addition to examples from world practice, the paper also mentions the HPP "Dabar" supply tunnel as a region structure representing a hydrotechnical tunnel under pressure with a length of 12125 m and which has been under construction since 2016. The modern concept of monitoring, testing, analyses, and integrating all relevant information during construction was applied to this tunnel to adapt to actual conditions in the field. application/pdf 9576139 bytes Jaroslav Černi Water Institute Mirković, Uroš Radovanović, Slobodan Divac, Dejan Dankov, Zoran Vučković, Dejan All rights reserved eng info:eu-repo/semantics/conferenceProceedings Contemporary Water Management: Challenges and Research Directions, Proceedings of the International Scientific Conference in the Honour of 75 Years of the Jaroslav Černi Water Institute, October 19-20 2022, Belgrade 2022 Tunneling in karst: a case study for HPP ''Dabar'' tunnel