Background Enguri Dam (sometimes spelled Inguri Dam) is one of the highest arch dams in the world, and it is located in the Enguri River in Jvari, Georgia, at an altitude of 240 m above sea level. It is part of the Enguri hydroelectric power station (HES). The dam is 271.5 m tall and 750 m wide. Its crest at 510 m altitude has a developed length of 728 m, and is 10 m thick. It has 14.5 km of high pressure tunnel that is 9.5 m in diameter, and five Francis-type generator units in the underground power plant, 275 Mw each. Construction of the dam started in 1961; it became temporarily operational in 1978, and it was completed in 1987. Repairs and refurbishment at Enguri HES took place in 1999, and in 2011 work began to complete the rehabilitation and to ensure safe water evauation to

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