BONDI RIAMP

The Bondi Reliability Improvement and Modernisation Program (RIAMP) aims to improve and modernise the Bondi Sewage Treatment Plant (STP). This program will improve older parts of the Bondi STP to maintain reliable plant performance and help contribute to the plants long term treatment improvements. Walter Construction and United KG Consortium were selected to undertake the construction phase of the project.

A sludge transfer bore hole 1500mm dia x 45.5m was required to drilled through high strength sandstone connecting the underground access tunnel. The designers were concerned about verticality tolerances and provisions were made for contingencies in case the hole turned out to be out of tolerance.

Avopiling was engaged by Bondi RIAMP to drill the bore hole. Two week program was scheduled to complete the bore hole. Avopiling used Soilmec R930 – the first of its kind in Australia- coupled with special augers manufactured by Avopiling Pty Ltd. The hole was completed in 6 days, well ahead of schedule, including establishment of the rig in a very congested area. The hole was drilled within 20mm vertical deviation over 45.5m surprising the whole construction team.

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