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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

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 will be identified in the Draft Tier 1 Environmental Impact Statement in early 2019. 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 Environmental Impact Statement. This will provide another opportunity for public comment. 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.

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