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Castle executive director Norcombe Barker said extra tanks installed yesterday meant the castle would not have to buy water if the usual supply ran out.
A helicopter was needed as trucks were unable to take the tanks high enough on the hill behind the castle for the gravity feed system to work, Mr Barker said.
``We are always trying to improve the infrastructure up there and trying to make sure we have enough water for all out our guests.''
``Apparently there's a dry summer coming up so we want to avoid having to buy water in which is inconvenient and expensive.''