PROJECTS
Sunset over Diamond Creek, Melbourne.
Yarra Valley Water completes Doreen to Diamond Creek Sewerage Project Yarra Valley Water has completed a $34 million project to upgrade the sewer network to support Melbourne’s fast-growing northern suburbs. A proud adopter of trenchless technology, Yarra Valley Water has an emphasis on adding value while minimising disruption to the community and environment.
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Map of Doreen to Diamond Creek sewer main.
28 TRENCHLESS AUSTRALASIA APRIL 2022
arra Valley Water has successfully delivered the Doreen to Diamond Creek Sewerage Project after two years of construction works. Design works commenced in February 2018, with design consultant Jacobs contracted to discern if there were any culturally significant artefacts on the banks of the Plenty River. Jacobs found close to 400 aboriginal stone artifacts over an area of several hundred metres, after which the contractor consulted local Wurundjeri to negotiate a different construction technique to the traditional open-cut excavation method. Horizontal Directional Drilling (HDD) was deemed the most viable solution to protect the archaeological site from harm. As most archaeological artefacts are located within the top 50 cm of soil, trenchless technology can effectively bore while avoiding disturbance to any culturally significant sites. As well as retaining cultural significance, reducing the need to excavate helped to maintain the integrity of the ecosystem. Yarra Valley Water was careful to ensure that works did not affect water or sewerage services in the area. Construction works commenced in March 2019 and were completed in November 2021. The project involved the installation of approximately 10 km of pipe and 17 new sewer maintenance holes under parkland and road reserves in the Doreen, Yarrambat and Diamond Creek areas. The new sewerage infrastructure will service properties in the rapidly expanding
