Seqwater is about to commence the staged upgrade of Maroon Dam to improve flood capacity and implement dam safety measures that were identified during recent design and geotechnical investigations. 

Design and geotechnical investigations at Maroon Dam have identified minimum upgrade requirements to address embankment stability and improve flood capacity. Stage 1 work will involve extension of the existing weighting berm 30 metres downstream and extension of grout curtain and foundation drains on the abutments to improve embankment stability on the eastern side of the dam. Excavation works in the spillway area will generate material for construction of the weighting berm and direct flood flows downstream of the embankment and outlet works.

Construction will take place while the dam is operational and a dam safety management plan will be developed in order to ensure that all relevant safety requirements are met. 

Public access to the lake and recreation area will remain open during construction for allowed recreation activities. In the event of any temporary closures, Seqwater will erect signage on site and will place notices on the recreation and safety notices page.

Download the Stage 1 fact sheet for more information. 

If you have further questions about this project, please contact Seqwater Community Relations team on 1800 771 497 or email

Thank you for your patience as we undertake this essential upgrade work.