South Central Projects

Interstate 10 Marsh Station Area Improvement

As part of the Arizona Department of Transportation's continued investment in I-10 improvements, ADOT began construction in fall 2012 to improve a segment of I-10 approximately 15 miles west of Benson (mileposts 288 through 291). The project is expected to have few traffic impacts for drivers, with infrequent nighttime lane closures, which will be communicated through traffic alerts.

Major features of the $17.2 million project, which is about 1.5 miles west of the new Marsh Station traffic interchange, include these improvements:

  • Removal of the existing Pantano Union Pacific Railroad bridge to allow taller commercial vehicles to travel on I-10 and avoid the current 67-mile detour to pass through the area
  • Construction of two new bridges at Cienega Creek to ensure that the highway is not impacted by water flowing in Cienega Creek during heavy rains
  • Reconstruction and realignment of the westbound lanes of I-10
  • Reconstruction of the eastbound lanes of I-10
  • Widening the median to enhance safety

Other work will consist of Cienega Creek bank protection, the construction of a retaining wall, new drainage and safety features, and salvaging and replanting the existing natural landscaping. The project is scheduled for completion in spring 2014.

The project schedule is subject to change due to a variety of reasons, including weather, availability of materials and mechanical difficulties. ADOT advises drivers to proceed through or near work zones with caution, to slow down and to be alert for construction equipment and personnel.