WestConnex M4 East Water Monitoring and Assessment



The M4 East is the first underground section of Sydney’s new WestConnex motorway system. It will connect to the widened M4 and extend it via twin motorway tunnels from Homebush to Haberfield with three lanes in each direction. The project is about 6.5 km long (with 5.5 km of the motorway in tunnel).

EMM was commissioned pre-construction in 2016 to undertake extensive surface water and groundwater monitoring in compliance with the project’s approved Water Quality Management Plan to assess potential impacts from the tunnelling on the receiving environment. Our team of hydrogeologists and water scientists developed site specific water quality trigger values with reference to baseline data, and continue to deliver monthly monitoring impact assessments throughout the life of the project.

Back to Projects



CPB Samsung John Holland Joint Venture

Related Projects

Groundwater impact assessment Allandale Quarry

Quarry Products

View Project

Baseline monitoring network design and review of groundwater


View Project