In September 2023 Council adopted an updated flood study review. The review used a finer modelling grid that previous models, incorporated the second Grafton Bridge, Pacific Motorway and West Yamba filling into the model and was validated against the January 2013, March 2021 and March 2022 flood events. The model has considered climate change with 2123 flood levels incorporating predicted increased rainfall and sea level rise under two Shared Socioeconomic Pathways (SSP) - SSP2 and SSP5. Council has adopted the SSP2 flood levels. Prior to adoption the flood model was independently peer reviewed.