News and Announcements from the I-70 Mountain Corridor

i-70 Mountain Corridor Header

Welcome to the Colorado Department of Transportation’s (CDOT) online source for information on the I-70 Mountain Corridor. Here you will find details on environmental studies, current and planned projects, and Context Sensitive Solutions tools for the Corridor.  See the Quick Links on the left side of this page.

Documents Are Now Available on the I-70 Wildlife Overpass Screening Report

Click here to view the I-70 Wildlife Screening Report.

Documents Are Available For the Clear Creek Sediment Control Action Plan

Sediment Control Action Plan

The I-70 Clear Creek Corridor Sediment Control Action Plan and the Clear Creek Sediment Control Action Plan Map Book are now available for viewing.

I-70 Mountain Corridor Record of Decision Signed

The Federal Highway Administration (FHWA) signed the Record of Decision (ROD) for the I-70 Mountain Corridor on June 16, 2011, marking the end of the first tier of National Environmental Policy Act (NEPA) environmental analysis and alternatives development for the I-70 Mountain Corridor Programmatic Environmental Impact Statement. The Record of Decision approves and provides a framework to implement a program of transit, highway, safety, and other improvements on the 144-mile route between Glenwood Springs and the western edge of the Denver metropolitan area. This decision is referred to as the Tier 1 decision.  Tier 2 NEPA processes will follow.

What happens next?

The signing of the ROD means that CDOT can move into Tier 2 NEPA processes and begin to implement specific projects in the Corridor consistent with the mode, general location, and capacity of the Tier 1 decision. Tier 2 NEPA processes will be required for all projects in the Corridor and may be preceded by feasibility or technical studies when potential solutions or funding scenarios are complex.

The Colorado Department of Transportation will use 4P (Project Priority Programming Process) to program specific Tier 2 projects into the Statewide Transportation Improvement Program (STIP). Stakeholders have a role in the process by providing input on project priorities. For the I-70 Mountain Corridor, CDOT has committed to specifically include the Collaborative Effort team members in discussions of project priorities. As projects are implemented, CDOT has committed to follow the I-70 Mountain Corridor Context Sensitive Solutions process to make Tier 2 decisions in a collaborative manner with stakeholders. The agencies also have signed and will follow conditions of other formal agreements developed during the PEIS to protect streams, wildlife, and historic properties in implementing Tier 2 projects. The Record of Decision contains an expanded discussion of mitigation strategies to be followed in Tier 2 NEPA processes.