On Sunday 27th January about noon, a flood peaked at just over 6M on the spillway at Borumba Dam, the highest ever recorded at the dam. The dam was built in 1963, after the even greater 1955 flood.
Torrential rain on the Conondale and Jimna Ranges resulted from a tropical depression that had earlier been Tropical Cyclone Oswald. The runoff quickly filled the dam, and rose to a new record level.
The large scour pool is evident immediately below the dam wall, and the turbidity in the usually clear lake can be seen in this oblique aerial image. Lake Borumba stores 45,952ML at full supply level.