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Interstate 11 Corridor Tier I Environmental Impact Statement

With the I-11 and Intermountain West Corridor Study complete, the Interstate 11 (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 potentially 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 received during the comment period will be addressed in the Final Tier 1 EIS, expected to be completed and available for review in 2021.

Although the deadline for comments on the Draft Tier 1 EIS document has passed, comments on the Tier 1 EIS 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.