o:1038 Remediation of the HPP ''Višegrad'' Dam en Abstract: The hydropower plant "Višegrad" is located on the Drina River upstream of Višegrad. Many seepage occurrences have been observed since the construction. Over time, the measured quantities of seepage water under the dam body increased significantly: from 1.4 m3/s (1990) to 14.68 m3/s (2012). Investigations were implemented during 2008-2009 period to define the directions of groundwater movement. Repair design was developed based on subject investigations. Repair was implemented with continuous monitoring of the effects of installation, on a complex monitoring system, and real-time data processing in the mathematical model results of which were then used to adjust and direct the works. The works were carried out in 2 phases. The inert materials were installed in the first phase, while the consolidation was carried out in the second phase. The total water losses from the reservoir at the end of the repair works were reduced to 3.74 m3/s. This paper presents the investigation activities carried out before and during the repair works, which facilitated the big success of works on the remediation of the HPP "Višegrad" dam. 1552100 978-86-82565-55-0 2022-11-18T10:08:08.087Z 44 no 46 Dejan Divac Institut za vodoprivredu "Jaroslav Černi" 0000-0002-1578-1431 Dušan Mikavica Institut za vodoprivredu "Jaroslav Černi" person 0000-0003-0283-0123 Zoran Dankov Institut za vodoprivredu "Jaroslav Černi" person Maja Pavić Institut za vodoprivredu "Jaroslav Černi" person Rajko Vasić Institut za vodoprivredu "Jaroslav Černi" person application/pdf 6345094 https://unilib.phaidrabg.rs/o:1038 no yes 1 70 92000004 71A04 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 85 111 Jaroslav Černi Water Institute 2022 Received: September 20, 2022 Revision: September 23, 2022 Accepted: September 26, 2022