There have been two rock slide events in September 2006 and March 2007. Because of concerns with the long term stability of the rock slope, the Contractor commissioned GCG to investigate the cause of the failures and provide recommendations regarding the long term stability of the North-South slope.
References
Valstad, T., Cabarkapa, Z. & Tinto, W. (2008). Rock slide in spillway cut at Projecto Trasvase Olmos, Peru, Int. Geological Congress, Oslo, Norway.
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