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Bondi Sewage Treatment Plant Reliability Improvement and Modernisation Program, Sydney

Population served


Average daily dry weather discharge

130 million litres/day

Treatment level

High-rate primary


Deepwater ocean outfall 2.2km from shoreline, 63m max. water depth, 512m diffuser zone

Eventual recycling capacity

3 million litres/day

Odour control

Wet scrubbing system & masking sprays; ferrous chloride dosing in the summer

Project cost


Plant built

Late 1940s

Ocean outfall constructed


Water Plan 21 first released


Water Plan 21 revised


Review of Environmental Factors displayed

August 2002

Construction contract awarded

June 2003

Project began

January 2004

Cavern tunnelling

January – late May 2004

Construction staging area established

April 2004

Below ground work completed


Hugh Bamford Reserve restoration work completed

October 2006

Scheduled completion


Plant owner/project sponsor

Sydney Water

Concept design

CH2M Hill and Sinclair Knight Merz

Detailed design & construction

United Group Infrastructure, Walter Construction Group and Golder Associates

Hugh Bamford Reserve restoration

Pan Civil

Weed control

Earth Repair & Restoration

Discharge licensing authority

Department of Environment and Conservation

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