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The Colorado Springs Metro Interstate Expansion (COSMIX) project, completed in December 2007, was the largest transport improvement project in Colorado Springs’ history. Building Information Modelling was a key tool in helping to deliver the ahead of schedule and on budget.
First opened in 1960, I-25 carried around 8,000 vehicles per day. At the time of project commencement, this had risen to over 100,000.
The comprehensive $150-million design-build project included:
This all needed to take place whilst allowing the continuous use by 100,000 vehicles per day. Ultimately the project was completed one year ahead of planned Colorado Department of Transport (CDOT) schedule.
CH2M HILL was the majority owner of the joint venture responsible for the design-build approach. This approach allowed work to begin on construction before 100 percent design completion. Taking this approach provided a number of benefits. For example, when the design-build team found cost-saving ways to reduce life-cycle costs while enhancing the project. The design shortened the storm drain system to reduce construction impacts to the historic 1930's Work Progress Administration (WPA) wall and floodplain habitat at the Monument Valley Park.
Key to success was the way that the project was divided into four construction segments to allow concurrent design and construction of multiple elements. This was achieved by:
Performing proposal-phase aerial photography and pre-award project mapping that provided a head start to our 18-month design phase.
Quality, safety and public information planning were integrated into these processes to ensure a comprehensive programme management approach. A collaborative team comprising 180 staff from the joint venture and 45 staff from CDOT helped to ensure project successful project delivery.
he successful approach was founded on design-build Building Information Modelling (BIM) based on Bentley software solutions. These were used to deliver the:
The software was able to integrate the efforts from multiple, and dispersed, designers providing relevant and timely electronic deliverables against a fast paced schedule.
The BIM technology (InRoads) was used to:
The ability to deliver to requirement, on target for cost and one year early was based on:
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