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Melbourne Water progresses Hawthorn Sewer Upgrade

Hawthorn Sewer Upgrade map

Last week, the Melbourne Water team completed excavation of the launch shaft in Hawthorn.

This was the first of two shafts that will be required for tunnelling operations in October.

The sewer relining occurred progressively in sections, using two techniques: cured-in-place pipe (CIPP) and glass reinforced plastic (GRP) processes. 

The Hawthorn Main Sewer was constructed more than 100 years ago in 1903, and upgrades were required to reline the sewer and rehabilitate manholes. 

The team will now launch the project’s tunnel boring machine (TBM), named ‘Lucy’ after Olympic Gold medalist Lucy Stephan. 

During the  shaft excavation, 4,600 t of excavated spoil was removed by 465 tandem truck movements, while 85 concrete trucks delivered 430 m3 of concrete to secure the 35 m shaft, with a diameter of 7.5 m. 

Melbourne Water said the upgrades are vital for ensuring asset function into the future, and the retrieval shaft on the Richmond side of the river will be completed in October. 

For more information visit the Melbourne Water website. 

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