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Responsible Agency: SunWater
BQ Role: Lead business case
Proposal Stage of Development: Preliminary evaluation complete
Planned Stage End Date: N/A
Estimated Cost of Delivery: $160 million*
Date of Publication: June 2016 (for the period 3 December 2015 – 3 June 2016)

PROBLEM DESCRIPTION

Paradise Dam is located approximately 80 kilometres southwest 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, and investigated options to prevent scour from occurring in future extreme weather events.

This investigation identified necessary improvements to the secondary spillway. Improvement works are being proposed to maintain efficient and safe operation of the secondary spillway during extreme weather events.

This project represents the highest priority for this storage beyond the works currently under construction.

PROPOSAL DESCRIPTION

SunWater proposes improvements to the secondary spillway to prevent significant scour in major flood events. Upgrades will include constructing a concrete apron and training wall in the secondary spillway, addressing the potential for scour.

This will ensure the dam continues to function as intended in line with best management practices for large dams. SunWater regularly conducts dam improvement projects in line with national industry guidelines to maintain safe and efficient dam operation.

NEXT STEPS

Commence Business Case.

* Nominal cost in Australian dollars 2015, estimate provided by Responsible Agency