Challenges in Hydro Projects : Planning the Restoration of RCC Structures - Case Study of Tapovan Vishnugad Hydro Power Project

Several natural challenges such as landslides, floods and earthquakes are to be considered for design of hydro projects. However, in some cases, hydro projects face unique and unforeseen challenges. Such an unprecedented incident happened at Tapovan Vishnugad Hydro Power Project on 7th February 2021. Structures in the barrage complex of the project were severely damaged by an unprecedented massive glacial debris flow incident after rockfall and avalanche in the upstream catchment. After the incident, comprehensive testing was planned to assess the integrity and soundness of the structures, before the start of restoration works of the damaged structures. Based on the integrity testing results, repair methodology and selection of the repair materials for restoration of RCC structure was done. Planning of restoration of RCC Structures based on condition assessment of RCC Structures for is discussed in this paper.