Flooding at Chinchilla peaked  at 7.24 metres on 28 December 2010, and again at 7.45 metres on the 12 January 2011. The river was above major flood level (6m) from the December 27 to January 1, and then again from January 11 to 14.

Houses begin to be affected at 6.6 metres, and the Courier Mail reported 36 properties to be affected.

Between 300 to 400 millimetres of rainfall was recorded over the Condamine River and nearby creeks during the month of December 2010. The heaviest rainfall periods during December 2010 and January 2011 occurred between January 6 and January 12 with falls between 200 and 400mm.                                                                             

Flood height records at Chinchilla started in 1970, with 5 major peaks in the record. This event is the highest peak in that record. The last major flood recorded at Chinchilla was 6.60 metres in May 1983 with major floods
also occurring in 1981 (6.15 metres) and 1970 (6.17 metres).

Link: More Info on the 2010-11 Queensland floods

Location map - 2011 Chinchilla Flood (Red dots - flood inundated …

December-January Rainfall - 2011 Chinchilla Flood

Flood Rainfall - 2011 Chinchilla Flood

Flood Height Graph - 2011 Chinchilla Flood

Annual Flood Peaks - Chinchilla