Skip to main content

Interstate 11 Corridor Tier 1 Environmental Impact Statement, Nogales to Wickenburg
Interstate 11 Corridor Tier 1 Environmental Impact Statement, Nogales to Wickenburg

Good to Know

FHWA and ADOT publish Errata with the I-11 Draft Tier 1 Environmental Impact Statement

On April 26, 2019, ADOT and FHWA issued an Errata (revised Chapter 4 and additional Appendix H1) to the Draft Tier 1 EIS.  The revised Chapter 4 includes analysis not previously included in the Draft Tier 1 EIS released on April 5. To allow additional time for public review and comment on the Errata, the comment period was extended to July 8, 2019. Visit the Public Meetings and Outreach page for more information, including public hearing details, repository locations, and how to comment.

Public Hearings Scheduled

The I-11 Draft Tier 1 Environmental Impact Statement and Preliminary Section 4(f) Evaluation (Draft Tier 1 EIS) was released for public review and comment on April 5, 2019. Visit the Public Meetings and Outreach page for more information, including meeting details, repository locations, and how to comment.

Where would Interstate 11 go?

At this point in the process, the Arizona Department of Transportation and the Federal Highway Administration have not determined a specific route for Interstate 11. A Recommended Corridor and the No-Build Option have been identified in the Draft Tier 1. After a series of public hearings and a comment period seeking community input, a Preferred Corridor Alternative and the No-Build Option will be identified in the Final Tier 1 EIS. This will provide another opportunity for public review. Finally, the Record of Decision by the Federal Highway Administration will present either a Selected Corridor Alternative or the No-Build Option. This is expected in 2020.

2,000 vs. 400 feet wide

The Draft Tier 1 EIS will present a recommended 2,000-foot-wide corridor, along with the No-Build (do-nothing) Option. For reference, a corridor is a 2,000-foot-wide swath of land. An actual freeway alignment is approximately 400 feet or less and would be determined during Tier 2 environmental studies. Tier 2 studies have not been funded or programmed yet.

Tier 1 EIS Evaluates wide corridors in multiple locations at a program level, within which a new transportation facility could be located. Outcome: Select a single corridor within which an alignment would be identified during Tier 2. Tier 2 Environmental Study Alignment and width are refined to minimize impacts. Evaluates design concepts for specific alignments within the corridor, such as 400 feet for a typical freeway alignment. Outcome: Select an alignment and enable permitting for that alignment. Tier 1 illustration shows a school, houses and body of water with a 2000 foot corridor width.  Tier 2 illustration shows roadway curving aroung to miss the school, houses and body of water with a 2000 foot corridor width.

Search

Translate