Dulles Metro’s commitment to the environment is detailed on this page.

The Virginia Department of Rail and Public Transportation and the project partners conducted extensive research to understand the environmental factors and impact of the proposed Dulles Corridor Metrorail Project. The following factors were assessed to identify the potential environmental consequences:

• Why transportation improvements are needed in the corridor;
• Why a Metrorail extension was selected to meet those needs;
• Other alternatives that were considered;
• The anticipated economic, environmental and social impacts of the extension;
• The estimated costs of the extension; and
• Remaining actions required to implement the Metrorail extension.

The Federal Transit Administration (FTA) approved the first Environmental Impact Statement (EIS) in March 2005. Since then, the Dulles Corridor Metrorail Project has advanced to a more detailed level of engineering, which requires additional environmental review to ensure the Project is in continued compliance with the National Environmental Policy Act (NEPA).

The Federal Transit Administration in November 2006 issued its Record of Decision (ROD) on an Environmental Assessment (EA) prepared by the Virginia Department of Rail and Public Transportation regarding design refinements to the Dulles Metrorail Project. This ROD approved the final alignment for the aerial portion of the rail line through Tysons Corner.

Environmental Assessment (February 2006)

The Project has made several design refinements as it has progressed through Preliminary Engineering, such as moving the Metrorail track to the median of Route 7 and shortening a tunnel in Tysons Corner.

The Federal Transit Administration has worked with the Project team to prepare an Environmental Assessment that describes the potential environmental effects that could result from these changes.

• Cover
• Abstract
• Table of Contents
• Chapter 1 - Purpose and Need for the Proposed Action
• Chapter 2 - Alternatives Evaluated
  • Figure 2-1: Key to Design Changes
  • Figure 2-2: Alignment Change from I-66 to Dulles Connector Road
  • Figure 2-3: Aerial Structure Types
  • Figure 2-4: Alignment Change in Tysons Corner
  • Figure 2-5: Proposed Cross-Section Changes along Route 7
  • Figure 2-6: Tysons East Station Plan Comparison
  • Figure 2-7: Tysons East Station Longitudinal Section
  • Figure 2-8: Tysons Central 123 Station Plan Comparison
  • Figure 2-9: Tysons Central 123 Station Longitudinal Section
  • Figure 2-10: Tysons Central 7 Station Plan Comparison
  • Figure 2-11: Tysons Central 7 Station Longitudinal Section
  • Figure 2-12: Tysons West Station Plan Comparison
  • Figure 2-13: Tysons West Station Longitudinal Section
  • Figure 2-14: Wiehle Avenue Station Plan Comparison
  • Figure 2-15: Wiehle Avenue Station Longitudinal Section
  • Figure 2-16: Changes to West Falls Church Rail Yard
  • Figure 2-17: Y-15 Yard Site: Proposed Phase I Construction Use
  • Figure 2-18: Proposed Stormwater Management Facilities
  • Figure 2-19: Potential Construction Staging Areas
• Chapter 3 - Environmental Effects
• Appendix A - List of Preparers
• Appendix B - Distribution List
• Appendix C - Summary of Effects

Environmental Assessment Public Hearing Report (June 2006)

A public hearing on the PE Design Refinements Environmental Assessment was held on March 28, 2006 at Kilmer Middle School in Vienna, Virginia. The purpose of the hearing was to provide citizens and agencies with an opportunity to comment on the proposed design refinements to the Dulles Corridor Metrorail Project and changes in effects and mitigation measures from what was documented in the project's Final EIS.

This Public Hearing Report formally documents and provides responses to comments received at the hearing and during the public comment period.

Read the Environmental Assessment Public Hearing Report (June 2006)  »

Final Environmental Impact Statement and Section 4(f) Evaluation (December 2004)

Volume I

• Signature Page
• Executive Summary
• Federal Transit Administration (FTA) Final Environmental Impact Statement
• Federal Transit Administration (FTA) – Abstract
• FTA Table of Contents
• Chapter 1 – Purpose and Need for the Proposed Action
• Chapter 2 – Alternatives Considered
• Chapter 3 – Social Effects
• Chapter 4 – Environmental Effects
• Chapter 5 – Economic Effects
• Chapter 6 – Transportation Effects
• Chapter 7 – Section 4(f) Evaluation
• Chapter 8 – Financial Analysis
• Chapter 9 – Secondary and Cumulative Effects
• Chapter 10 – Evaluation of Alternatives Carried Forward
• Chapter 11 – Public Coordination and Comments

Volume II – Final EIS Appendices

• Appendix A – List of Preparers
• Appendix B – List of Recipients
• Appendix C – Glossary of Terms
• Appendix D – Acronyms
• Appendix E – References
• Appendix F – Memorandum of Agreement
• Appendix G – Map of Environmental Conditions
• Appendix H – Alternatives Previously Considered
• Appendix I – Dulles Green Proffer Statement

Volume III – Final EIS Appendices

• Chapter 1 – Purpose and Need for the Proposed Action
• Chapter 2 – Alternatives Considered
• Chapter 3 – Land Use and Socio-Economics
• Chapter 4 – Environmental Effects
• Chapter 5 – Economic Effects
• Chapter 6 – Transit Effects
• Chapter 7 – Section 4(f) Evaluation
• Chapter 8 – Financial Analysis
• Chapter 9 – Secondary and Cumulative Effects
• Chapter 10 – Evaluation of Alternatives Carried Forward
• Chapter 11 – Comments, Consultations and Coordination
• Chapter 12 – DEIS/SDEIS Process
• Chapter 13 – Project Implementation
• Appendix J – Executive Summary
• Appendix J– General Plans
• Appendix J – Public and Agency Comments and Responses
• Appendix J – Addendum
• Appendix J – Index
• Appendix K – Agency Correspondence
• Appendix L – Federal Consistency Determination

Volume IV

• General Plans: Line
• Chapter 1 – General
• Chapter 2 – Property Identification
• Chapter 3 – Plan and Profile
• Chapter 4 – Curve Tables
• Chapter 5 – Typical Sections
• Chapter 6 – TPSS and TBS Location Plans
• Chapter 7 - Structural

Volume V

• General Plans: Facilities
• Chapter 1 – Index and Legend
• Chapter 2 – Route 772
• Chapter 3 – Route 606
• Chapter 4 – Dulles Airport
• Chapter 5 – Route 28
• Chapter 6 – Herndon-Monroe
• Chapter 7 – Reston Parkway
• Chapter 8 – Wiehle Avenue
• Chapter 9 – Tysons West
• Chapter 10 – Tysons Central 7
• Chapter 11 – Tysons Central 123
• Chapter 12 – Tysons East
• Chapter 13 – Full Yard and Shop
• Chapter 14 – WFC Yard and Shop

Section 106 Activities Annual Reports

These reports summarize historic preservation activities carried out for each calendar year for the Dulles Corridor Metrorail Project in accordance with the project's executed Section 106 Memorandum of Agreement.

• Section 106 Annual Activities Report for 2019
• Section 106 Annual Activities Report for 2018
• Section 106 Annual Activities Report for 2017
• Section 106 Annual Activities Report for 2016
• Section 106 Annual Activities Report for 2015
• Section 106 Annual Activities Report for 2014
• Section 106 Annual Activities Report for 2013
• Section 106 Annual Activities Report for 2012
• Section 106 Annual Activities Report for 2011
• Section 106 Activities Annual Report for 2010
• Section 106 Activities Annual Report for 2009
• Section 106 Activities Annual Report for 2008
• Section 106 Activities Annual Report for 2007
• Section 106 Activities Annual Report for 2006
• Section 106 Activities Annual Report for 2005

 Tyson's Corner Tunnel Engineering and Environmental Study (January, 2007) »