The National Ploughing Association is working to repair the damage caused by flooding at the Laois venue on Friday.
Videos have been circulating on social media in recent days showing the extent of the damage.
Tens of thousands of people are due to descend on Rathiniska on Tuesday for the opening day of the three-day event.
Managing Director of the NPA, Anna May McHugh, told KCLR that workers are busy repairing the venue.