Sundt and a joint venture partner reconstructed Arizona’s busy Cordes Junction traffic interchange at Interstate 17 (I-17) and State Route 69 (SR 69), about 65 miles north of downtown Phoenix. The 50-year-old interchange is used by approximately 40,000 vehicles per day, most of which are just passing through on their way to smaller towns in northern Arizona.

The project created two separate interchanges: one that has a high-speed off-ramp from northbound I-17 to northbound SR 69 for through traffic, and a diamond interchange that has a system of on- and off-ramps designed for slower, local traffic. In addition, several local streets associated with the interchange were realigned and widened.

A total of seven new bridges were constructed, including a post-tensioned, cast-in-place concrete structure that was the most challenging aspect of the project. In order to avoid road closures, it was built over live traffic on I-17. The owner is the Arizona Department of Transportation.

Build Arizona Award-Associated General Contractors - Arizona Branch