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Sonoran Corridor report available for review

It explains corridor alternatives recommended for further study
March 29, 2019

Sonoran Corridor 3 recommended routes 3.21.19PHOENIX ‒ A report describing how the Arizona Department of Transportation reduced the potential routes for the proposed Sonoran Corridor from dozens of options to three recommended for further study, along with the no-build alternative, is now available for review and comment.

The Sonoran Corridor Draft Corridor Selection Report explains how factors such as growth, economic benefits, environmental impacts and feasibility contributed to identifying these alternatives in the Tier 1 Environmental Impact Statement.

Public comment on the report is invited through Monday, April 22. Public comment on a public meeting held March 7 in Tucson is invited through Sunday, April 7.

The Sonoran Corridor would connect Interstate 10 and Interstate 19 south of Tucson International Airport. The Tier 1 Environmental Impact Statement, which started in May 2017, evaluates multiple 2,000-foot-wide corridors and the no-build option. A Tier 1 Draft Environmental Impact Statement is expected in late 2019 with a preferred alternative for public review. A Tier 1 Final Environmental Impact Statement is expected by spring 2020.

The next phase would include a Tier 2 study to locate an approximately 400-foot-wide route within corridor identified as the preferred alternative. The timeline and funding for the Tier 2 study haven’t been identified.

ADOT has held four public meetings about the Sonoran Corridor over the past two years. Comments received at those meetings are included in the draft Corridor Selection Report and are being considered along with input from area businesses and governments, including Pima County and the cities of Tucson and Sahuarita.

To see the draft reports, visit azdot.gov/Sonoran Corridor. Click on the Documents tab to see the draft Corridor Selection Report, and click on the Alternatives tab to see a map of the three corridors that have been recommended for further study. A no-build option also remains under consideration.

The public can submit questions or comments in the following ways:

  • Email: SonoranCorridor@azdot.gov
  • Phone:  The ADOT Bilingual Project Information Line: 855.712.8530 
  • Mail:  Sonoran Corridor Tier 1 EIS Study Team c/o Joanna Bradley, 1221 S. Second Ave., Mail Drop T100, Tucson, AZ 85713
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