​The final Coffs Creek and Park Beach Flood Study for the Coffs Creek (and tributaries) catchment updates older flood estimates using more accurate terrain data, an improved understanding of local rainfall patterns, and more sophisticated modelling techniques. It also considers the impact of the detention basins and other recent flood mitigation improvements.

Council has also used this information to review drainage strategies for the Park Beach area. Park Beach Management Options Assessment - May 2018 uses the new flood model to assess drainage modifications in the residential and commercial areas of the Park Beach area. The study assesses the reduction in flood damage costs for the various modifications and provides a benefit cost ratio for each option.