Dulles Metrorail - The Environmental Impact Report
Preliminary Engineering Design Refinements 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
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