SR 347 Improvement Project

SR 347: I-10 to the City of Maricopa Roadway Improvements Project

Design is currently underway for the SR 347: I-10 to the City of Maricopa Roadway Improvements Project. There are four main elements of this major corridor improvement project, which is located along SR 347 between Interstate 10 and the City of Maricopa. The 15-mile project corridor runs through both Maricopa and Pinal counties and is primarily located within the Gila River Indian Community.

This project includes widening the highway to construct an additional lane in each direction on SR 347 from I-10 to the City of Maricopa, pavement rehabilitation of the existing lanes along the 15-mile stretch of roadway, constructing new grade-separated interchanges at Riggs Road and Mammoth Way, and intersection improvements at Casa Blanca Road and Maricopa Road.

Construction on this project is expected to begin in Summer 2026 and will take approximately three years to complete.