A stretch of Oceanview Avenue is set to be opened up for a new wastewater pipeline as Sydney Water prepares to bring the next phase of its Vaucluse and Diamond Bay project into Dover Heights.
The Dover Heights works are not due to begin until mid-2027, but activity has already started further east, where contractor Abergeldie Complex Infrastructure is preparing sites at Eastern Reserve and Diamond Bay. Sydney Water scheduled site establishment there from 24 September, ahead of construction expected to begin in late October and continue for about 18 months.
Oceanview Avenue forms part of the project’s second construction area, together with Old South Head Road in Rose Bay. Sydney Water plans to install a pressure pipeline along the avenue using open trenching, linking the existing Bondi wastewater network with a new underground pump station at Eastern Reserve. Pipes along Old South Head Road between Hamilton Street and Northcote Street are also due to be upgraded.
A Project Moving Closer To Dover Heights
The works are part of a wider effort to stop untreated wastewater from flowing directly into the ocean from the Vaucluse and Diamond Bay area. Sydney Water says about four million litres of untreated wastewater is currently discharged each day. The new network will instead send those flows to the Bondi Water Resource Recovery Facility for treatment.
A project map released with the September newsletter traces the proposed pressure pipeline along Oceanview Avenue and towards Eastern Reserve, where the underground pump station will sit. Gravity pipelines will also be installed between Diamond Bay and Eastern Reserve using microtunnelling, connecting the existing network and ocean outfalls to the new station. The overall Diamond Bay component is expected to be completed by mid-2028.
Years of Consultation Now Turn To Construction
Sydney Water has been consulting on the project since 2018, including through the Dover Heights and Vaucluse/Diamond Bay precinct committees. More than 13,000 properties have received project newsletters, while the engagement program has also included information sessions, webinars, door-knocking and meetings with affected property owners and other stakeholders.
Hundreds of submissions were received during that process. Sydney Water says feedback contributed to changes intended to reduce the visual footprint of the works and retain more open recreational space.
Property visits around Eastern Reserve and Diamond Bay began in early September as the project shifted from planning into site preparation. Similar early activity is expected around Oceanview Avenue and Old South Head Road before the Dover Heights stage begins next year.
Abergeldie is also preparing controls for noise, dust, vibration, traffic, drilling, runoff and vegetation during construction. The next public information session will be held at Diamond Bay Bowling Club from 6pm to 7pm on 14 October, followed by a Vaucluse/Diamond Bay Precinct Committee meeting at the same venue from 7pm to 9pm on 21 October.
Published 25-September-2026
