Case Study

Modeling for a Major Underground Project




COST: $3.2B


The project was complex, due to the scale and size. The scope included the 2 mile long SR 99 tunnel, the north and south approaches and the North and South Operations buildings. Since this was a public infrastructure project, where profit margins were low, our client needed to do it once and do it right. Use of BIM helped in building virtually and benefitted the customer with (a) Building spatially for spatial coordination to avoid conflicts on site during construction thereby avoiding rework; (b) Using BIM for quantity take-offs, feeding into production and (c) producing install drawings with digital tags that were available for the team during installation in iPads and also on paper.


Sanveo had prior experience working on large scale infrastructure projects such as the Transbay Transit Center in San Francisco with the client. This led to the client trusting in the abilities of the Sanveo team. The services provided included BIM content development for electrical components such as switch gear, distribution panels, electrical distribution system such as conduits and cable trays and light fixtures. The submittals included 3D BIM including Clash Coordination; 2D install drawings and Bills of quantities for various electrical components.


Sanveo’s team started with planning prior to starting work on the project. Some senior Sanveo team members evaluated the project with drawings and submittals. They then proceeded with discussions with the Customer’s field crew and the Project Management Team to comprehend their needs. After the project evaluation phase, a comprehensive ‘BIM Implementation plan’ was laid out listing the BIM deliverables that the project would benefit from, the workflow that would be adopted, the resource management plan, information that would be required to develop the BIM along with a proposed schedule. This was then presented the Customer’s team – changes were made based on feedback. This BIM implementation plan was then executed by the able Sanveo team.


– Ability for field crew to visualize the electrical details, ascertain constructibility
– Ability to automatically take off quantities from the model
– Plan for construction by walking-through the model (especially in the least accessible tunnel areas
– Overall project visualization and clash resolution a.k.a constructibility analysis prior to construction, resulting in substantial cost and time savings
– Record BIM available readily for O&M phase