Responsible Agency: Seqwater
Proposal Stage of Development: Detailed Business Case Underway
Planned Stage End Date: Q1 2017
Estimated Cost of Delivery: $80 million*
Date of Publication: December 2016 (for period 4 June 2016 – 3 December 2016)


Lake Macdonald Dam on Six Mile Creek on the Sunshine Coast requires an upgrade to meet modern standards and the performance requirements of the Queensland dam safety regulations into the future. The upgrade will allow the dam to safely manage severe weather and earthquake events.


The objective of the proposal is to ensure the dam can meet performance standards into the future. This includes improving the spillway discharge capacity and earthquake stability while maintaining water supply security. Studies have considered a range of options including decommissioning of the dam, retrofit of strengthening works and new build options.


Complete Detailed Business Case    >    Building Queensland assisting with Detailed Business Case.

* Nominal Cost in Australian Dollars 2016, estimate provided by Responsible Agency.