WMAwater reviewed the gauging station interpretation and flood estimation for Lockyer Creek Flood Study. A review of the critical assumptions underlying the flood study was necessary particularly those to which the outputs are sensitive. It was important to also understand how these assumptions affect the uncertainty of the flood estimates. A key part of the review was assessing if the study presents a best estimate or a conservative estimate. It was necessary to confirm that the assumptions did not combine in a way that biases the flood study results.