unlike the flooding which occurred in january 2011 at ipswich and brisbane, the flooding there was caused by the natural flooding of the creek system rather than deliberate dam releases. waters in laidley in the lockyer valley reached an all-time high with the main street in the town inundated. at waterford in logan city, the logan river reached a peak of 9 m at midnight on 28 january. flood waters were slow to recede along the river. a mudslide hit three houses in logan city.