I-17 Frontage Road Drainage Improvement: Greenway Road to ACDC Canal


The Arizona Department of Transportation is constructing improvements to the cross street drainage system along the Interstate 17 frontage road between Greenway Road and Dunlap Avenue in Phoenix. The purpose of the project is to improve the drainage facilities that remove storm runoff from the Greenway, Thunderbird, Cactus, and Peoria cross streets, helping to reduce the potential for flooding at the Interstate 17 overpasses.

The improvements will include a new, gravity-powered storm drain system, utilizing various sizes of concrete pipes and new drainage basins at Thunderbird Road, and the removal of the existing pump stations from the cross streets.The new system will discharge storm water into the Arizona Canal Diversion Channel (ACDC), north of Dunlap Avenue.

map of I-17 Frontage Road Drainage Improvement: Greenway Road to Peoria Avenue


View an illustration ( English | Español ) of how a gravitational flow drainage system works.

Presentation to the Phoenix City Council - Jan. 14, 2020

Project Schedule

Construction started in early 2020 and is anticipated to end early 2023. Work began at the south end of the project near the Arizona Canal Diversion Channel and will proceed north to Greenway Road. Four phases of construction are scheduled:

  • Phase 1: Arizona Canal Diversion Channel (ACDC) at Dunlap Avenue to Peoria Avenue
  • Phase 2: Peoria Avenue to Cactus Road
  • Phase 3: Cactus Road to Thunderbird Road
  • Phase 4: Thunderbird Road to Greenway Road

What to Expect

  • The south- or northbound I-17 frontage road will be closed around-the-clock during each phase.
  • Drivers who typically use the frontage roads should plan to use alternate routes and allow extra travel time.
  • The cross streets in the project area will be closed at times.
  • ADOT will maintain access to homes, businesses and other properties in the project area via alternate routes.
  • Weekend, weekday and overnight work will be scheduled.

Stay Up to Date

Schedules are subject to change based on weather and other unforeseen factors. Subscribe to receive project updates and traffic alerts by email. For more information, please call the ADOT Bilingual Project Information Line at 855.712.8530 or submit a question or comment by email. For real-time highway conditions statewide, visit ADOT’s Traveler Information Site at www.az511.gov, follow ADOT on Twitter (@ArizonaDOT) or call 511, except while driving.