"The Colorado Department of Transportation and Federal Highway Administration prepared this Revised Draft Programmatic Environmental Impact Statement to provide reader-friendly, concise information about the major findings of the I-70 Mountain Corridor National Environmental Policy Act (NEPA) process. This Revised Draft ... replaces the 2004 Draft."--Abstract.

"I-70 Mountain Corridor Programmatic Environmental Impact Statement (PEIS) addresses travel demand of the Corridor between Glenwood Springs and C-470, from approximately mileposts 116 to 260, and traverses five counties in Colorado: Garfield, Eagle, Summit, Clear Creek, and Jefferson. This PEIS includes an examination of the purpose and need, alternatives under consideration, affected environment, environmental consequences, cumulative impacts, and mitigation measures for proposed alternatives. The purpose of the PEIS is to take a broad view of the transportation issues and to develop alternatives to reduce future congestion and improve mobility within the Corridor. The PEIS provides an independent and systematic process of developing and analyzing the need, safety, implementation strategies, environmental sensitivity, and community values of alternatives for the Corridor at a Tier 1 level ... Subsequent National Environmental Policy Act (NEPA) environmental analysis, documentation, and review will be prepared at the Tier 2 level to enable decisions regarding site-specific, project-level details on alignments, high- capacity transit technology, project impacts, costs, and mitigation measures after a preferred alternative has been identified"--Abstract.

At the Draft EIS public hearings in December 2008, the Colorado Department of Transportation (CDOT) and the Federal Highway Administration (FHWA) committed to selecting a preferred alternative by using a collaborative decision-making process with corridor community representatives and stakeholders. A new alternative was developed that addressed the public and stakeholder concerns while satisfying the project's purpose and need. Based on the outcomes of various outreach activities and the PACT process, CDOT and FHWA re-examined the previously eliminated alternatives. This resulted in the development of a new alternative called the Partial Cover Lowered Alternative.

"The Colorado Department of Transportation (CDOT) and Federal Highway Administration (FHWA) (lead agencies) prepared this Final Programmatic Environmental Impact Statement (PEIS) to provide reader-friendly, concise information about the major findings of the Interstate 70 (I-70) Mountain Corridor National Environmental Policy Act (NEPA) process. This Final PEIS encompasses data gathered and presented over a ten-year period..."-- p. I-1.