Boundary Creek Remediation

NSW
Sydney Water
In progress

As part of the West Region Delivery Team (WRDT), we are delivering two integrated packages of work to rehabilitate and stabilise Boundary Creek to address current impacts and prevent future erosion. The environmentally sensitive project has required detailed planning, precise execution and a coordinated approach to navigate contaminated materials, creek stabilisation and ecological considerations.

Scope of Works

The project scope is categorised into two phases: early works and substantive works.

Early Works

The early work focused on safely enabling access and preparing the creek environment for major remediation activities. 

Key elements included:

  • Management of contaminated soil.
  • Vegetation and tree removal.
  • Construction of access tracks into the creek for vehicles and pedestrians.
  • Installation of upstream and downstream cofferdams.
  • Installation of bypass pumps and construction of a platypus bypass swale, ensuring the protection of habitat and safe passage throughout the construction period.

Substantive Works

The main construction activities have involved works to stabilise and restore the creek, including:

  • All bulk earthwork excavation to subgrade level.
  • Remediation of asbestos contaminated material.
  • Installation of Redi-Rock retaining walls.
  • Rehabilitation of the existing creek.
  • Drainage installation.
  • Landscaping and other works associated with the remediation of Boundary Creek.

Bulk earthworks and water management

Bulk earthworks in a constrained creek corridor have required careful sequencing, specialist machinery and strict environmental and safety controls. Managing groundwater and surface flows across the active creek system has been a major operational focus, with all water captured, treated where required, and carefully managed to maintain water quality and prevent sediment migration into sensitive habitats.

Contaminated materials

The presence of contaminated soil across the site has significantly increased the complexity of the works. Controlled excavation zones, specialist remediation teams, continuous air and water monitoring, and strict compliance with hazardous-material protocols have been required to protect workers, neighbouring land and the creek ecosystem.

Interfaces with neighbouring businesses

The Boundary Creek corridor adjoins neighbouring businesses, requiring meticulous access planning, clear communication and operational coordination to minimise disruption and maintain safe business continuity throughout construction.