YVW – Donnybrook Link Branch Sewer - Stage 1
Donnybrook Link Branch Sewer will provide extra capacity to accommodate expected growth within the Northern Growth Corridor. Stage 1 was connected to the Amaroo Main Sewer.
Key construction aspects of Donnybrook Link Branch Sewer Stage 1 involved the installation of:
- 450m of DN800 GRP SN10,000 sewer by open cut methodology
- 250m of DN860 GRP SN80,000 sewer by trenchless methodology
- 350m of DN860 GRP SN64,000 sewer by trenchless methodology
- 4 x 1500mm diameter GRP maintenance holes
- Design and construction of 1 x 4200 mm diameter GRP maintenance hole with vortex drop at 17m deep
Project Challenges
- Construction depths of up to 17 metres
- High risk activity; excavation works near Melb-Sydney optic fibre cable
- Boring in mixed ground conditions