At $1.3 billion, Central 70 is Colorado’s largest highway infrastructure project in state history. Made possible through a public-private partnership, the project rebuilt 10 miles of Interstate 70, added an express lane in each direction, removed a 50-year-old viaduct and lowered the interstate below grade between Brighton and Colorado boulevards.

Canada-based SNC Lavalin Group, the parent of Atkins, said the sale when completed will further speed the corporate transition to engineering and project management.

Photographs chosen from submissions to ENR.com/northwest/photos and ENR.com/california/photos.

Recalling limited facetime with C-suite executives as a young engineer, the now CEO of the engineer's North America business told ENR conference attendees that he welcomed emerging professional feedback "as a key part of being a good leader.”

The P3 project, 11.7-miles and largely tunneled, could cost between $8 and $13 billion, the government forecasts.