Supplemental Draft Environmental Impact Statement (SDEIS) - coming soon!

CDOT, in partnership with FHWA, is working on the next document for the EIS which will serve as the basis for future improvements on the I-70 East Corridor. Whenever there are changes, new information, or further developments on a project which result in significant environmental impacts not identified in the most recently distributed version of the Draft or Final EIS, a Supplemental EIS is necessary (read the May 2012 Press Release). The Supplemental Draft Environmental Impact Statement (SDEIS) will be made public in Summer/Fall 2013.

After the conclusion of the PACT process, which resulted in no consensus on a preferred alternative, the project team introduced a new alternative at the May 2012 Public Meetings which gained a lot of support from the public. This new alternative, which would lower the highway through the Swansea and Elyria neighborhoods and include a cover on the highway between Columbine Street and Clayton Street (see Alternatives), addresses many of the public concerns regarding the project.

The SDEIS document will include detailed analysis of the new alternative while also updating the previously analyzed alternatives—including rebuilding the viaduct—to reflect any changes. There will be a new public comment period once the document is published. In the meantime, the project team held public meetings in November 2012 and April 2013 (see Meeting Minutes). The EIS process is anticipated to be completed and a decision document signed on the project in late 2014 (see Schedule).

Draft Environmental Impact Statement (DEIS)

The project team has completed the Draft Environmental Impact Statement (DEIS) for I-70 in east Denver. The DEIS includes a detailed analysis of the social, environmental, and economic effects of the project alternatives as required by the federal government according to NEPA. The DEIS was made available to the public for comment from November 14, 2008 to March 31, 2009.

You may click the individual titles to view or download a single chapter or technical report. To download full volumes in PDF format, click the volume links in the title bars. To view the DEIS comments we received during the formal comment period, click here: DEIS - Public Release Comments.

Volume 1 - DEIS	View by chapter below     or  download VOLUME 1 (61mb PDF file)
	Download Adobe Reader Cover, Table of Contents Executive Summary Chapter 1: Introduction Chapter 2: Purpose and Need Chapter 3: Alternatives Considered Chapter 4: Transportation Impacts and Mitigation Measures Chapter 5: Affected Environment, Environmental     Consequences, and Mitigation Chapter 6: Community Outreach and Agency Involvement Chapter 7: Section 4(f) Evaluation References, List of Preparers, and List of Recipients
Volume 2 - Appendices	View by chapter below     or  download VOLUME 2 (101mb PDF file)
	Appendix A – Alternative Maps Appendix B – Agency Coordination Appendix C – National Environmental Policy Act (NEPA)     Clean Water Act Merger Report Appendix D – Historic Preservation
Volume 3 - Technical Reports	View by chapter below     or  download VOLUME 3 (334mb PDF file)
	Air Quality Technical Report Alternatives Analysis Technical Report Biological Assessment Environmental Justice Technical Memorandum Hazardous Materials Technical Report Hydrology and Hydraulics Technical Report Right of Way and Relocations Technical Report Traffic Technical Report Traffic Noise Technical Report Wetlands and Waters of the U.S. Technical Report and     Appendix A Wetlands and Waters of the U.S. Appendix B

Previous Studies

I-70 East EIS Section 106 - Determinations of Effects, January 2010

Part 1 (pages 1-10)
Part 2 (pages 11-35)
Part 3 (pages 36-59)
Part 4 (pages 60-137)

East Corridor Major Investment Study (MIS), July 1997

Chapters 1-3

- Executive Summary
- MIS Background
- Corridor Purpose and Need Summary

Chapter 4

- Transportation Alternative Evaluation Process

Chapter 5-6

- Recommended Corridor Investment
- Implementation

back to top