Construction

Construction of the Rosehill Recycled Water Scheme commenced in June 2009 at the Fairfield plant site (Corner of North St and East Pde, Fairfield) with remediation of the site and to relocate of an existing stormwater and sewer main. Construction of the water recycling plant commenced in November 2009 with the recycled water main network and reservoirs planned to commence in January 2010.

A number of construction techniques are proposed including:

• open trenching

• pipe bursting

• horizontal directional drilling

• case boring.

 

The recycled water main would generally be installed in roadways and parks. Trenches for the main would be dug by an excavator or a trenching machine. After the construction, the trench would be back filled and the surface restored in accordance with council and RTA guidelines.

 

Along Woodville Road it is proposed to pipe burst an existing isolated gas main to install a new recycled water main. This would involve digging small pits at intervals along the road to access the isolated gas main. Pipe bursting removes the need to dig long open trenches and would minimise disturbance to the road surface. Pipe bursting will reduce traffic delays associated with construction works.

 

To cross under rivers and creeks Jemena will use a horizontal directional drill so that a main will be inserted without disturbing the watercourse.

 

Horizontal directional drilling is proposed to cross under:

• Prospect Creek at Fairfield Park

• Duck River between Deniehy Street and Shirley Street Granville

• Duck Creek at Elizabeth St Granville

 

Case boring is also proposed to install mains crossing some major roads including The Horsley Drive Fairfield, Parramatta Road Granville, Fairfield Street Yennora and railway lines at Yennora station.

Commissioning and supply of recycled water to industries and irrigators at Rosehill and Smithfield will start in July 2011.