Development of Unrecoverable Displacements of the Dam of the Sayano-Shushenskaya Hydroelectric Power Plant While in Use Under Design Load Parameters (1990 – 2016)

Questions regarding the adaption of the dam of the Sayano-Shushenskaya hydroelectric power plant once the designed normal pool level had been reached in 1990 are considered. The impact of natural and technogenic factors on this process at different periods of operation of the structure (prior to repair of the dam and foundation (1990 – 1996), during repair (1996 – 2003), and following repairs (2004 – 2012) are investigated. Causes for amplification of asymmetry in operations between the left-bank and right-bank parts of the dam are established. Data attesting to the existence of a stabilized state of the structure in 2013 – 2016 are presented and conditions that will prevent the development of unrecoverable processes in the near future are formulated.