The Draft PEIS was made available for public comment on December 10, 2004.

The I-70 Mountain Corridor Draft PEIS and Section 4(f) Evaluation (Volume I), and Resource Maps and Appendices (Volume II) were released for public review and comment with the publication of the Notice of Availability (NOA) in the Federal Register on December 10, 2004. The Draft PEIS was originally slated for a 90-day comment period with a closing date of March 10, 2005. In response to public request, the comment period was extended an additional 75 days, with the official close of the comment period moved to May 24, 2005.