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tijdens de bouw van de dam moesten van tijd tot tijd metingen worden verricht om te kijken of alles volgens plan ging. men peilde bijvoorbeeld de stroomversnellingen om te kijken of er geen ontgronding zou plaatsvinden.
during the construction of the dam, measurements had to be carried out from time to time to ensure everything proceeded according to plan. rapids were created, for instance, to make sure the bottom did not wash away.
