The airport was closed for nearly six days since December 1 during the deluge.
Deepak Shastri, director, Chennai Airport said that the assets damaged due to floods have been assessed.
The estimated damage to communication/ navigation & surveillance facilities/equipment and other damages works out to Rs 31.06 crore.
Further, due to business interruption, Chennai Airport has also incurred a loss of around Rs 35.50 crore (traffic & non-traffic tevenue).
The airport was shut down after it was inundated mainly due to water from Adyar River, which runs under the second runway.