HDD, Tunnelling

HDD works awarded for NSW pipeline

Sydney Water will provide the villages of Bargo and Buxton with a new wastewater service by 30 June 2014, under the Priority Sewerage Program. Bargo and Buxton will have a pressure sewerage system that works by collecting wastewater in a small tank installed on each property.

Wastewater will then be transferred via a 14 km transfer main to the existing wastewater system in Tahmoor. The transfer main will be constructed using a combination of drilling and trenching.

UEA has been contracted to perform the horizontal directional drilling (HDD) works associated with the transfer pipeline and will install a total of 18 underbores. Six minor HDDs, ranging in length from 106-151 m, will be completed with a DitchWitch AT3020, with the remaining 12 major HDDs, ranging in length from 454-1,006 m, to be completed with Vermeer D100x120s and D300x500.

Construction of the transfer pipeline commenced in February, and completion of drilling and trenching is expected by September 2014. In order to deliver the program of works within the required timeframe, UEA will mobilise a minimum of three HDD rigs and support equipment.

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