Menangle Park Release Area (MPRA) is located south-west of Sydney, approximately 5 kilometres west of Campbelltown. The site is bounded to the west and south by the Hawkesbury-Nepean River, by Menangle Road to the east and by the approximate alignment of the Mount Annan Coal Railway spur to the north. UrbanGrowth NSW (UG NSW) has nominated two precincts within MPRA as First Release Precincts – Precinct 200 and Precinct 300. The state owned statutory corporation responsible for the provision of wastewater services to MPRA has developed the detailed planning for this area with two natural wastewater catchment areas being identified. Two separable portions, pressure and gravity mains will service these catchment areas. The infrastructure will be delivered in two stages to ensure wastewater services are available in line with dwelling occupation. UEA’s works are part of the overall project to deliver the wastewater infrastructure to service the first stage of development.
Prior to mobilising to site, UEA assisted the client with the bore designs and developed bore profiles to suit the requirements of this project.
The first bore involves the installation of 400 metres of DN450mm PE100 PN16 pipe as part of a rising main. This bore crosses beneath two major underground infrastructure mains (Jemena’s DN900mm High Pressure Natural Gas Pipeline and APA’s DN250mm Wilton to Botany Ethane Pipeline). Due to the critical nature of these assets UEA has assisted our client in developing safe working systems and attending workshops with the asset owners to gain approval to install the sewer beneath their assets.
The second bore involves the installation of 560 metres of DN500mm PE100 PN12.5 pipe as part of a gravity main. This bore crosses beneath the Sydney Catchment Authority Upper Canal and the Hume Highway. Due to stringent grade requirements of this gravity main UEA will utilise wireline technology to ensure the main is installed within the required tolerances.
Both bores will be undertaken utilising the Vermeer D100 drill rig. UEA commenced the first bore in July with the second bore commencing on completion of the first. UEA is programmed to complete the works by mid October 2015.