CGC provide Geotechnical Advisory services to support the Independent Verification team for the $1.6bn, 41km Toowoomba Bypass.


The project includes provision of a 4 lane, primarily greenfield carriageway traversing the Toowoomba Range, with over 40 bridges, cuttings and embankments up to 50m high, retaining walls and pavement over reactive subgrades.


Our services include technical advice, risk management advice/workshops, construction inspections, release of hold/ witness points and review of instrumentation & monitoring.


Challenges include mountainous terrain, relict landslides, reactive subgrade conditions, variable rock mass conditions, major cutting and filling operations, 3rd party impacts, program constraints and extensive stakeholder interfacing.

Advisory | Verification | Construction Phase Services | Stakeholder Management

Arcadis. End Clients: DTMR & Nexus Infrastructure