The earthfill dam structure is high and long. The dam wall holds back the reservoir when at full capacity. From a catchment area of that includes the Numinbah Valley and Springbrook Plateau, with most being contained within state forests and national parks, the dam creates Advancetown Lake, with a surface area of . The uncontrolled un-gated spillway, located at above sea level, has a discharge capacity of . Initially managed by the Gold Coast City Council up until 2008, the dam is now managed by Seqwater.