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APPENDIX – E PROJECT DESCRIPTION I-64 Hampton Roads Bridge-Tunnel Expansion Project Hampton Roads Connector Partners 240 Corporate Blvd

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APPENDIX – E PROJECT DESCRIPTION I-64 Hampton Roads Bridge-Tunnel Expansion Project Hampton Roads Connector Partners 240 Corporate Blvd APPENDIX – E PROJECT DESCRIPTION I-64 Hampton Roads Bridge-Tunnel Expansion Project Hampton Roads Connector Partners 240 Corporate Blvd. 4th floor Norfolk, VA 23502 Hampton-Norfolk, Virginia August 30, 2019 TABLE OF CONTENTS Project Description.......................................................................................................................... 1 E.1 Project Overview...................................................................................................................... 1 E.2 Purpose and Need ................................................................................................................... 5 E.3 Project History ......................................................................................................................... 6 E.4 Project Schedule.................................................................................................................... 11 E.5 Project Location ..................................................................................................................... 11 E.6 Design Overview.................................................................................................................... 11 E.6.1 Design Segments ........................................................................................................... 11 E.6.2 Island Expansions .......................................................................................................... 14 E.6.2.1 North Island ............................................................................................................. 14 E.6.2.2 South Island ............................................................................................................ 14 E.6.3 Tunnels........................................................................................................................... 15 E.6.4 Trestle Bridges ............................................................................................................... 16 E.6.4.1 North and South Trestle Bridges .............................................................................. 16 E.6.4.2 Willoughby, Bay Avenue, and Oastes Creek Trestle Bridges ................................... 16 E.6.5 Roadway Expansion ....................................................................................................... 16 E.7 Construction Equipment Overview ......................................................................................... 17 E.8 Construction Areas ................................................................................................................ 17 E.9 Construction Elements and Sequence ................................................................................... 19 E.10 Construction Means and Methods ......................................................................................... 20 E.10.1 Island Expansion ............................................................................................................ 20 E.10.1.1 North Island ............................................................................................................. 20 E.10.1.2 South Island ............................................................................................................ 22 E.10.2 Tunnels........................................................................................................................... 24 E.10.2.1 Tunnel Approach Structures and Portals ................................................................. 25 E.10.2.2 Management of Excavated Material......................................................................... 27 E.10.2.3 Onshore and Offshore Ground Improvement ........................................................... 29 E.10.2.4 Offshore (in-water) Structures for Tunnel Support ................................................... 30 E.10.3 Trestle-Bridges ............................................................................................................... 30 E.10.3.1 North Trestle-Bridge ................................................................................................ 31 Page | E-i E.10.3.2 South Trestle-Bridge ................................................................................................ 32 E.10.3.3 Willoughby Bay Trestle-Bridge ................................................................................. 35 E.10.3.4 Mason Creek Trestle-Bridge .................................................................................... 35 E.10.3.5 Oastes Creek Trestle-Bridge ................................................................................... 35 E.10.4 Roadway Expansion ....................................................................................................... 36 E.10.5 Materials Management ................................................................................................... 36 E.10.6 Marine Operations & Logistics ........................................................................................ 37 E.10.6.1 Marine Operations Plan ........................................................................................... 37 E.10.6.2 Vessel Fleet ............................................................................................................. 38 E.10.6.3 Willoughby Spit ........................................................................................................ 41 E.10.6.4 Harbor of Safe Refuge ............................................................................................. 41 E.10.7 Removal of Temporary Structures .................................................................................. 42 E.10.8 Demolition and Removal of Existing Structures .............................................................. 43 E.11 References ............................................................................................................................ 44 Page | E-ii TABLES Table E-1: Project Owner and Design-Builder ........................................................................................ 5 Table E-2: Relationship between Design Segments and Construction Areas ....................................... 19 Table E-3: Estimated Number of Vessels at Peak by Structure ............................................................ 38 FIGURES Figure E-1: HRBT Expansion Project Location....................................................................................... 2 Figure E-2: HRBT Expansion Project Features ...................................................................................... 4 Figure E-3: Hampton Roads Crossing Study Timeline ........................................................................... 8 Figure E-4: Refined Selected Action LOD ............................................................................................ 10 Figure E-5: HRBT Design Segments and Key Map .............................................................................. 13 Figure E-6: North Island Layout ........................................................................................................... 14 Figure E-7: South Island Layout ........................................................................................................... 15 Figure E-8: Key Design and Construction Considerations for the Final Tunnel Grade.......................... 15 Figure E-9: HRBT Construction Areas ................................................................................................. 18 Figure E-10: Temporary Outfalls for Construction Discharges ............................................................. 28 Figure E-11: Planned Discharge Flow Schedule and Line Diagrams ................................................... 29 Figure E-12: North Trestle Bridge Construction Sequence ................................................................... 32 Figure E-13: South Trestle Bridge Construction Sequence .................................................................. 34 Figure E-14: Barge Operation Areas - North Trestle Bridge ................................................................. 39 Figure E-15: Barge Operation Areas - South Trestle Bridge................................................................. 40 Figure E-16: Barge Operation Areas - Willoughby Bay ........................................................................ 41 Figure E-17: Mooring Areas ................................................................................................................. 42 Page | E-iii Project Description E.1 PROJECT OVERVIEW The Virginia Department of Transportation (VDOT) awarded the design and construction of the Hampton Roads Bridge-Tunnel (HRBT) Expansion project (the Project) in April 2019 to Hampton Roads Connector Partners (HRCP), a design-build joint venture and the permit applicant. The Federal Highway Administration (FHWA) is the lead federal agency for the Project. The Project will address severe traffic congestion at the existing HRBT crossing by increasing capacity and upgrading approximately ten miles of Interstate 64 (I-64) between the Settlers Landing Road Interchange (Exit 267, MM 267.26) in Hampton and the Interstate 564 (I-564) Interchange (Exit 276, MM 277.19) in Norfolk, Virginia. Over 90,000 vehicles use the HRBT daily, seasonally exceeding 100,000 vehicles per day, which represents about half of all traffic crossing the James River, Hampton Roads water body between South Hampton Roads (“Southside”), and the lower “Peninsula”
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