Dalby experienced four flood peaks during the December-January period of 2010-2011. The river peaked at 2.94 metres (Dec 20), 3.54 metres (Dec 27), 3.74 metres (Jan 10) and 3.49 metres (Jan 12). Major flood level (3.5m) was exceeded on December 27 and again from the 10th to the 11th of January.

Houses in low lying areas begin to be affected at 3.5 metres. 100 properties inundated during the 3.54 metre peak on December 27, according to the Courier Mail.

Between 300 and 600 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 from January 6 to 12, with falls between 200 and 400 millimetres.

Flood height records in Dalby began in 1908.  The last major flood recorded at Dalby was 3.80 metres in June 1983 and the record flood is 4.50 metres in February 1981.

Link: More Info on the 2010-11 Queensland floods

Location map - 2011 Dalby Flood (Red dots - flood inundated towns…

December-January Rainfall - 2011 Dalby Flood

Flood Rainfall - 2011 Dalby Flood

Flood Height Graph - 2011 Dalby Flood

Annual Flood Peaks - Dalby