Nowra St Anns & Lyrebird - Sewer Rising Main Replacements
- Project StatusIn progress
Shoalhaven Water, as Council’s Water and Sewer Utility, are currently replacing two sewer rising mains which feed into the Nowra Sewerage Treatment Plant. This work is a continuation of the Southern Incoming Mains project which planned to upgrade all sewer rising mains entering the new Nowra Treatment Plant.
Works for the St Anns SRM consists of installation of 2,236m of DN560 HDPE (High Density Poly Ethylene) pipe. Works for the Lyrebird SRM consists of 675m of DN450 HDPE pipe. The package of work will be delivered in three distinct Stages using a mix of internal and external resources:
- Stage 1 – From St Anns Sewerage Pump Station to Lyrebird Park. The St Anns SRM will be laid by Council staff under the road on St Anns Street adjacent to the existing main which is predominantly under driveways and footpath verges. This element of work also contains a new DN700 Steel Pipe Casing to be installed beneath the Princes Highway.
- Stage 2 – Is planned as a drilled installation by contract using Horizontal Directional Drilling (HDD). This technique minimises disturbance to road pavements and driveway accesses.
- Stage 3 – To be laid by Council staff through Lyrebird Park. Transitions to a shared trench once passing the Lyrebird Park Sewerage Pump Station. Enters the paddocks north of Lyrebird Park and connects to where the southern incoming mains project completed.
It is anticipated that both these mains will be replaced before July 2021.
Shoalhaven Water completed the Auger Bore beneath the Princes Highway and interconnection with the old main. St Anns Street to the east of the highway is now open again and Stage 1 is due for completion in early March.
Stage 2 site works are planned to commence on 29th March 2021. Stage 3 site works commence immediately upon completion of Stage 1 anticipated in early March 2021. Further notifications to affected residents for these stages will be communicated in due course.
Council appreciates your patience as we continue with replacement of this important sewer rising main.