Sydney Metro City and Southwest
Sydney Metro is the first fully automated metro network and arguably the most transformative rail infrastructure project in Australia’s history. SMEC is proud to have provided technical expertise across multiple sections of the project, which celebrated the construction completion of Sydney Metro City and Southwest Tunnels and Stations Excavation (TSE) project in late 2021. The new metro will vastly improve connectivity across metropolitan Sydney, leaving a legacy for generations to come.

Complex excavation works unlock tunnels for new metro stations

SMEC was engaged in partnership with APP to provide Independent Certification (IC) services for the project which extends the metro rail under Sydney Harbour. SMEC was responsible for certifying the design and construction of tunnels and station excavation works in accordance with the IC Deed. SMEC’s expertise provided assurance to the client team, safely and efficiently managing certification of this complex tunnelling project.


The TSE delivered a 15.5km twin railway tunnel from the Sydney north shore in Chatswood, beneath the harbour and the CBD through to Sydenham in Sydney’s inner west. Five purpose-built tunnel boring machines (TBMs) were deployed on the project. A mixed-shield slurry TBM and four double-shield, hard-rock TBMs were specially designed to excavate in the under-harbour ground conditions.


The project scope also delivered excavations and tunnels for new metro stations at Crows Nest, North Sydney, Barangaroo, Martin Place, Pitt Street and Waterloo, and civil works for a new stabling facility at Marrickville. In a separate role, SMEC was also engaged as the Lead Consultant and safety assurance manager for the design of Crows Nest Station, which has delivered outstanding design efficiencies and sustainability outcomes.


Talk to one of our specialists about our role on the Sydney Metro City and Southwest Project.