From Point Cloud to Net-Zero: The Digital Transformation of the Place du Portage III Renewal

Place  du Portage III (PDPIII) is Public Services and Procurement Canada's (PSPC)  $1.6-billion renewal of a 1.3-million-square-foot, nine-tower federal complex  originally built in the 1970s. The project must replace major base-building  systems, modernize workplaces, support accessibility and sustainability  upgrades, and progress through complex phasing while maintaining operational  continuity. In this setting, conventional document-centric delivery creates  significant risk: incomplete or outdated information about existing  conditions, fragmented coordination across disciplines and sub-consultants,  and data that is difficult to reuse for carbon assessment, handover, and  future operations.

For rehabilitation, these risks are amplified because new work must  interface with an existing structure and systems that may differ from legacy  drawings. Unverified conditions can lead to design conflicts, rework, delays,  and safety or access constraints. At the same time, the project's net-zero  carbon objectives require material, quantity, and performance data to be  available in structured form rather than reconstructed manually after major  design decisions have been made.

The challenge was therefore not simply to introduce BIM software. It was to  establish a reliable digital information-management environment that connects  physical reality, multidisciplinary models, project coordination,  construction sequencing, carbon analysis, and lifecycle asset data. NRC and  EllisDon addressed this challenge by developing and demonstrating an  integrated, standards-aligned digital workflow on the PDPIII renewal.

The NRC and EllisDon team implemented an end-to-end digital delivery system on  Place du Portage III and codified it as a five-stage framework aligned with ISO 19650: define goals and information requirements; establish the BIM  Execution Plan and Common Data Environment; deploy and monitor; measure and  improve; hand over validated data for operations.

Reality capture and scan-to-BIM: LiDAR scanning and photogrammetry produced  point clouds as the verified baseline of existing conditions; design models  were checked against them so new systems such as HVAC ducting fit the 1970s  structure before fabrication.    Managed coordination: all discipline models were federated weekly within  the CDE; automated checks flagged hard and clearance clashes, tracked in  Autodesk Construction Cloud and resolved virtually before reaching site.

ISO 19650 CDE: Autodesk Construction Cloud and Tandem served as the single  source of truth for nine towers and dozens of sub-consultants, with strict  naming and metadata conventions, and WIP–Shared–Published–Archive states as  an audit trail.

4D phasing: schedules were linked to the models to rehearse construction  fortnightly, surfacing time-space conflicts early and protecting occupant  movement through the phased transition.

BIM-enabled carbon monitoring: material quantities were extracted from the  IFC model and mapped to life-cycle inventory datasets in NRC's NBLA  openBIM-LCA application, with an open-source model checker validating each  IFC file against carbon-quantification requirements — enabling whole-building  LCA in real time as the design evolved.    

Governance ties it together: named roles, gates, acceptance thresholds, and  hybrid KPIs that measure productivity and carbon alike.