“…In addition to geotechnical monitoring, periodic geodetic surveys have been undertaken since the construction stages of the dam. The geodetic monitoring system consists of 15 reference stations that spread over an area as far as 2.5 km from the dam site and 53 control stations established at the crest, the abutments and the downstream shell of the dam [14,15]. The surveys employ conventional geodetic instruments and techniques, whereas in more recent years (2002)(2003)(2004), satellite (GPS) survey methods were implemented [16].…”