Our Projects

River Torrens to Darlington (T2D)

Project Brief

Client: CPB / ACCIONA
Project Value: $15.4Bn
Engagement Period: OCT 2023 - MAR 2024
The T2D Project is the final 10.5km section of Adelaide’s North-South Corridor, and will complete 78km of non-stop, traffic light-free motorway between Gawler and Old Noarlunga. When complete, more than 50% of the T2D Project will be tunnels.
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Involvement

Croí personnel were engaged to provide tender design services, including:

  • Reviewed design outputs to ensure constructability and compliance with utility providers’ specifications.
  • Contributed to program development, including work sequencing, productivity estimates, and traffic staging.
  • Facilitated constructability workshops, drawing on civil, structural, and utility engineering expertise.
  • Advised on optimal locations for utility crossings relative to future motorway structures.
  • Engaged with Tier 1 stakeholders to align design and construction sequencing of civil and structural works.
  • Assisted in the identification and planning of utilities for the early works package.
  • Supported risk management through ongoing maintenance of the project’s risk register during the tender phase.

Key Achievements

  • Ensured constructability and compliance of design outputs with utility authority specifications, reducing redesign risks.
  • Led constructability workshops that identified and resolved critical design and construction issues early in the process.
  • Benefitted project cost and timelines by determining optimal utility locations.
  • Proactively identified and scoped utilities for inclusion in the early works package, supporting efficient project mobilisation.
  • Maintained and updated the risk register during the tender phase, improving visibility and control of project risks.

Key Interfaces

  • Ausgrid
  • Sydney Water
  • Jemena
  • Optus
  • Telstra
  • NBN

Key Benefits

  • Improved constructability of designs, reducing rework and on-site clashes.
  • Ensured alignment with utility authority requirements, supporting timely approvals and smoother execution.
  • Enhanced program accuracy by integrating practical construction inputs early in planning.
  • De-risked early works through clear identification of utility constraints and requirements.
  • Strengthened collaboration between design and delivery teams through targeted workshops and stakeholder engagement.

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