Utah County I-15 Corridor Expansion (I-15 CORE) Design-Build
To support economic development and meet transportation demands through the year 2030, the Utah Department of Transportation (UDOT) initiated the I-15 CORE project to reconstruct 24 miles of freeway in Utah County. I-15 CORE added two lanes in each direction, replaced the original asphalt with new 40-year concrete pavement, extended express lanes throughout much of the project and rebuilt or replaced 63 bridges and 10 freeway interchanges.
Fluor/HDR Global Design Consultants LLC (F/HDR) was the lead designer on the design-build team for the $1.725 billion I-15 CORE project. The design-build contractor was a consortium of four companies — Fluor Enterprises, Ames Construction, Ralph L Wadsworth and Wadsworth Brothers — that combined to form Provo River Constructors (PRC).
Fluor/HDR, along with PRC, implemented a number of innovative solutions on the I-15 CORE project to enhance mobility for the traveling public. In particular, the project included a diverging diamond interchange at the 500 East Interchange in American Fork and a continuous flow intersection (the first of its kind in Utah County) at University Parkway and Sandhill Road in Orem. Fluor/HDR also developed a modified diamond interchange at Provo Center Street that greatly improves traffic flow while addressing the unique topography of the area and supporting Provo City's long-term economic development goals.
Fluor/HDR and PRC also made a considerable investment in temporary pavement and bridge widening to maintain the same number of existing lanes throughout the majority of construction. This, along with staged construction of interchanges and the use of accelerated bridge construction, minimized traffic disruptions throughout construction. These innovative approaches responded to UDOT's priority for maintaining as much capacity in the corridor as possible and resulted in 90 percent of all closures and restrictions occurring during nighttime hours.
The design-build delivery method allowed the team of F/HDR and PRC to provide UDOT and the traveling public with a highly accelerated schedule, accomplished by advancing design and construction of all project segments concurrently rather than in phases. The project was completed in an unprecedented 35 months (two years ahead of UDOT's original schedule), making it the fastest billion-dollar public highway project ever built in the United States.
- 2014 - Award of Merit, Outstanding Civil Engineering Achievement Awards, American Society of Civil Engineers
- 2013 - Grand Prize, America's Transportation Awards
- 2013 - National Design-Build Award, Transportation Projects, Design-Build Institute of America