Proposal Stage of Development: Preliminary Business Case Underway
Building Queensland Role: Assisting with Preliminary Business Case
Estimated Cost of Delivery: $260 million*
Date of Publication: June 2017 (for period 4 December 2016 – 3 June 2017)
Paradise Dam is located approximately 80 kilometres south west of Bundaberg on the Burnett River. It is a key component of the Bundaberg Water Supply Scheme—holding up to 300,000 megalitres of water for the city of Bundaberg and farmland irrigation.
During the 2013 floods, extensive scour occurred downstream of the primary spillway. SunWater immediately repaired the scour and downstream toe of the dam, and investigated options to prevent scour occurring in future extreme weather events.
This investigation identified necessary improvements to the primary spillway. Improvement works are being proposed to maintain efficient and safe operation of the primary spillway during extreme weather events.
The Primary Spillway Improvement Project represents the highest priority for this storage beyond the works currently under construction, based on SunWater’s portfolio risk assessment.
The proposal investigated options to improve the safety of Paradise Dam. Improvements to the primary spillway are proposed to prevent significant scour occurring downstream of the toe of the dam in major flood events. These works will address energy dissipation in the primary spillway and improve the primary spillway apron and dissipator.
Improvement works will ensure the dam continues to function as intended in line with best management practices for large dams, including guidelines from the Australian National Committee on Large Dams Incorporated (ANCOLD). Works are not expected to impact landholders adjacent to the dam, irrigation customers or recreational users wanting to access boat ramps, picnic areas and other dam amenities.
Complete Preliminary Business Case
* Nominal Cost in Australian dollars 2015, estimate provided by Responsible Agency.