San Pedro River Bridge Replacement Project


The Arizona Department of Transportation will be starting a bridge replacement project on B-10/4th St. in Benson, AZ. The work will replace the San Pedro River Bridge, located in Benson, AZ

What to expect during construction

Drivers on B-10/4th St. in Benson, should expect a full closure of B-10/4th St. between the Cochise County Yard and Pomerene Road beginning Nov. 2 through August 2022.

The New Bridge

The new bridge will be wider, with 12 foot travel lanes in each direction and a 10 foot wide shoulder.


During the closure, motorists can use Pomerene Road to enter or exit I-10, and to travel west of the San Pedro Bridge. Motorists can use Ocotillo Road to enter or exit I-10, and to travel east of the San Pedro Bridge. 

Stay Informed

ADOT welcomes your questions or comments. Please feel free to contact us in any of the following ways:

  • Online: Submit a question or comment through the ADOT website. Visit and then select “Projects” from the dropdown menu.
  • By phone: Call the ADOT Bilingual Project Information Line at 855.712.8530.
  • By mail: Write to ADOT Community Relations, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007.
  • For information about current project-related restrictions and closures, please visit or call 511, except while driving.

ADOT will provide more information about project schedules and potential traffic impacts as information becomes available. Stay informed about traffic restrictions before they occur by subscribing to receive timely traffic alerts by email.