Water and mud damage from the November 11 event is estimated at between 10 and 15 million francs, IOC media relations coordinator Sophie Brinca told the Swiss ATS news service on Monday.
The flooding has affected the major part of the committee’s headquarters, leaving only its historic château de Vidy still open to employees.
The IOC hopes to be able to reopen the main building early in the New Year, although it cannot provide a specific time frame.
“One cannot yet give a precise date,” Brinca told ATS.
“They talk of January, but nothing is confirmed.”
The bursting of a water pipe caused the flooding of the below-ground portion of the IOC building.
The organization’s computer department and part of its paper archives were damaged, along with communications.
On the bright side, insurance from the city of Lausanne will defray expenses incurred by the accident, ATS said.