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Interstate 11 Corridor Tier I Environmental Impact Statement

With the I-11 & Intermountain West Corridor Study complete, the I-11 efforts now move to the next phase, with projects and studies continuing in both Arizona and Nevada.

Arizona is continuing the process through a Tier 1 Environmental Impact Statement (EIS) Study to identify a Selected Corridor Alternative between Nogales and Wickenburg, Arizona.

The I-11 Draft Tier 1 Environmental Impact Statement and Preliminary Section 4(f) Evaluation (Draft Tier 1 EIS) was completed and made available for public review and comment from April 5, 2019 through July 8, 2019. All comments and questions will be addressed in the Final Tier 1 EIS, expected to be completed and available for review in 2020.

Although the deadline for comments on the Draft Tier 1 EIS has passed, comments on the study can be made at any time during the study process. To learn more, visit the Contact Us page.

Zoom in on a satellite view of the corridor alternatives.

In Nevada, the Regional Transportation Commission of Southern Nevada (RTC) led the effort to complete I-11 from US-95 to US-93 near the Hoover Dam Bypass Bridge, approximately 12.5 miles (Phase 1), while the Nevada Department of Transportation (NDOT) constructed the portion of I-11 from Railroad Pass to US-95, approximately 2.5 miles (Phase 2). Both phases were built simultaneously beginning in the spring of 2015 with construction completed in 2018.

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