COWRA SHIRE – COMERFORD & LACHLAN ST RETICULATION MAINS

850M OF 100MM PVC RETICULATION MAINS - ROAD UNDER BORE AND ASSOCIATED INFRASTRUCTURE

Cowra Shire Council required a Design and Construct Potable pipeline upgrade for exiting mains. Council has identified the need to replace an existing pipeline along the Comerford St and Lachlan St the existing fibro main is well past its life with continual mains breaks and needs urgent replacement. There are connections to existing rising mains, and 15 existing metered service lines along the alignment including connection to Weeroona Retirement Village, mainline line connections crossing Redfern St (RMS Road) will require under boring. All pipelines are to be kept in service throughout the works and transferred to the proposed new pipeline as part of the commissioning of the works.

Works Undertaken

• Open trench Construction of approximately 900m of DN100 PVC Water main.
• Installation of 8 Fire Hydrants along the mainline.
• Installation of 10 Isolation Gate Valves along the pipeline.
• Connection into the existing DN150 supply mains at Redfern St and Dowell St
• 5 Mainline branch connections to pick up existing branch lines
• 16 existing meter connections to be transferred off existing mainlines
• 1 Road crossings along pipeline route to be under bored
• Manage Traffic Control and traffic movements per day along Comerford and Lachlan St
• Testing - Commissioning and Disinfection of Pipeline

Highlights, Innovations and Key Risks

• Project finished on schedule and budget even with delays due to RMS works
• No major disruption to town water supply through the project duration
• RMS Road daily traffic management along roadside to eliminate traffic delays
• Manage Traffic Control with all interconnecting intersections along Comerford and Lachlan Streets per day
• No underground service strikes for the duration of the project
• 6 branch roads to cross without causing traffic delays or residential disruption