APPENDIX A DETAILED PROJECT DESCRIPTION

  TABLE OF CONTENTS

Appendix A Tables Appendix A Figures and Maps

A.1   INTRODUCTION

A.2   PROPOSED PROJECT LOCATION AND SETTING

         A.2.1   Overview

         A.2.2   Proposed Submarine Cable Route and Study Corridor

         A.2.3   Proposed Onshore Cable/Electrical Interconnection Routes

A.3   PROJECT COMPONENT DESIGN

         A.3.1   Overview

         A.3.2   Transmission Systems

         A.3.3   Fiber Optic Communications Cable

         A.3.4   HVDC Converter Stations

         A.3.5   HVAC Interconnections to PG&E Switchyards

         A.3.6   Electromagnetic Fields (EMF)

         A.3.7   Audible Noise

A.4   CONSTRUCTION ACTIVITIES

         A.4.1   Planning, Engineering, Procurement, and Construction Management

         A.4.2   Converter Stations

         A.4.3   Construction Equipment and Materials Delivery

         A.4.4   HVDC Transmission Lines

         A.4.5   Landside Underground HVDC Cable Installation

         A.4.6   HVAC Interconnections Construction

A.5   OPERATION AND MAINTENANCE PROCEDURES

         A.5.1   Operation

         A.5.2   Routine Maintenance

         A.5.3   Reliability and Availability

A.6   PUBLIC SAFETY

         A.6.1   Introduction

         A.6.2   Construction Phase

         A.6.3   Operational Phase

         A.6.4   Waste Management

         A.6.5   Chemical Management

A.7   ABANDONMENT PROCEDURES

A.8   ALTERNATIVES CONSIDERED

         A.8.1   Introduction

         A.8.2   Alternative Converter Station Sites

         A.8.3   Alternatives Considered but Eliminated from Further Consideration

         A.8.4   No Project Alternative

A.9   CAISO-RELATED PROJECTS

         A.9.1   Background

         A.9.2   Revised Action Plan for San Francisco

         A.9.3   Long-term Transmission Planning Study

A.10 REFERENCES


List of Tables

Table A.2-1        Known Utility Crossings

Table A.2-2        Other Known Crossings

Table A.3-1        Summary of Proposed Project Components and Major Equipment

Table A.4-1        Estimated Project Schedule

Table A.4-2        Estimated Construction Workforce Workers per Month

Table A.4-3        Construction Equipment Utilization

Table A.4-4        Construction Truck Deliveries of Equipment and Materials

Table A.4-5        Estimated Land Disturbance

Table A.9-1        CAISO-Related Projects


List of Figures and Maps

Figure A.1-1         General Location Map

Figure A.1-2         Proposed Converter Site/HWC

Figure A.1-3         Proposed Converter Site/Standard Oil

Map A.2-1            Detailed Project Location Strip Map
Links: (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

Figure A.2-1         Trans Bay Cable Interconnections

Figure A.2-2         Typical Configuration for Submarine Cable

Figure A.3-1         San Francisco Converter Station Site (HWC)

Figure A.3-2         San Francisco Converter Station Plan View (HWC Site)

Figure A.3-3         San Francisco Converter Station Elevation View (HWC Site)

Figure A.3-4         Photosimulation of San Francisco Converter Station (HWC Site View from Potrero Hill)

Figure A.3-5         Photosimulation of San Francisco Converter Station (HWC Site View from 23rd Street and Illinois)

Figure A.3-6         Pittsburg Converter Station Site (Standard Oil)

Figure A.3-7         Pittsburg Converter Station Plan View (Standard Oil Site)

Figure A.3-8         Pittsburg Converter Station Elevation View (Standard Oil Site)

Figure A.3-9         Photo Simulation of Pittsburg Converter Station (Standard Oil Site)

Figure A.3-10         Typical 400 kV HVDC Submarine Cable System Magnetic Field

Figure A.3-11         Typical Installation of Double-circuit 115 kV HVAC Land Cable in Pre-Installed Conduits

Figure A.3-12         Typical Installation of Double-circuit 115 kV Land Cable in Duct Bank (Alternate)

Figure A.3-13         Typical 115 kV HVAC Buried Cable Magnetic Field (In Conduit)

Figure A.3-14         Typical 115 kV HVAC Buried Cable Magnetic Field (In Duct Bank)

Figure A.3-15        Typical Installation of Single-circuit 230 kV HVAC Land Cable

Figure A.3-16        Typical 230 kV HVAC Buried Cable Magnetic Field

Figure A.3-17        Typical Installation of 230 kV and 400 kV HVDC Cables

Figure A.3-18         Typical 230 kV and 400 kV Buried Cable Magnetic Field at 1 Foot Above Ground Level

Figure A.3-19         Typical 230 kV and 400 kV Buried Cable Magnetic Field at 5 Feet Above Ground Level

Figure A.3-20         Typical 230 kV and 400 kV Buried Cable Magnetic Field at 10 Feet Above Ground Level

Figure A.3-21         Typical Installation of Double-circuit 115 kV Overhead Transmission Tower

Figure A.3-22         Typical Installation of Single-circuit 230 kV Overhead Transmission Tower

Figure A.4-1           Proposed New Access Road to Standard Oil Converter Station Site (Plan View)

Figure A.4-2           Proposed New Access Road to Standard Oil Converter Station Site (Elevation View)

Figure A.4-3           Cable Ship Giulio Verne

Figure A.4-4           Diagram of Hydroplow

Figure A.4-5           Simultaneous Cable Lay and Burial Operation

Figure A.4-6           Typical Protective Mattress

Figure A.4-7           Typical Exposed Cable or Pipeline Crossing

Figure A.4-8           Typical Directional Drilling Operations

Figure A.4-9           San Francisco Converter Station (HWC Site) HDD Location

Figure A.4-10          Pittsburg Converter Station (Standard Oil Site) HDD Location

Figure A.4-11          PG&E Pittsburg Switchyard HDD Location

Figure A.4-12          San Francisco Converter Station (Mirant Alternative) HDD Location

Figure A.8-1            San Francisco Converter Station Site (Mirant Alternative 1)

Figure A.8-2            San Francisco Converter Station Plan View (Mirant Alternative 1)

Figure A.8-3            San Francisco Converter Station—Elevation View (Mirant Alternative 1)

Figure A.8-4            Photosimulation of San Francisco Converter Station (Mirant Alternative 1—View from Potrero Hill)

Figure A.8-5            Photosimulation of San Francisco Converter Station (Mirant Alternative 1—View from 23rd and Illinois)

Figure A.8-6            San Francisco Converter Station Site (Mirant Alternative 2)

Figure A.8-7            San Francisco Converter Station—Plan View (Mirant Alternative 2)

Figure A.8-8            San Francisco Converter Station—Elevation View (Mirant Alternative 2)

Figure A.8-9            Photosimulation of San Francisco Converter Station (Mirant Alternative 2—View from Potrero Hill)

Figure A.8-10          Photosimulation of San Francisco Converter Station (Mirant Alternative 2—View from 23rd and Illinois)

Figure A.8-11          San Francisco Converter Station Site (Mirant Alternative 3)

Figure A.8-12          San Francisco Converter Station Plan View (Mirant Alternative 3)

Figure A.8-13          San Francisco Converter Station—Elevation View (Mirant Alternative 3)

Figure A.8-14          Photosimulation of San Francisco Converter Station (Mirant Alternative 3—View from Potrero Hill)

Figure A.8-15          Photosimulation of San Francisco Converter Station (Mirant Alternative 3—View from 23rd and Illinois)

Figure A.8-16          San Francisco Converter Station Site (Sheedy Alternative)

Figure A.8-17          San Francisco Converter Station Plan View (Sheedy Alternative)

Figure A.8-18          San Francisco Converter Station Elevation View (Sheedy Alternative)

Figure A.8-19          Photosimulation of San Francisco Converter Station (Sheedy Alternative)

Figure A.8-20          Pittsburg Converter Station Site (West Tenth Street—Alternative 1 [E/W])

Figure A.8-21          Pittsburg Converter Station Plan View (West Tenth Street—Alternative 1 [E/W])

Figure A.8-22          Pittsburg Converter Station Elevation View (West Tenth Street—Alternative 1 [E/W])

Figure A.8-23          Photosimulation of Pittsburg Converter Station (West Tenth Street—Alternative 1 [E/W])

Figure A.8-24          Pittsburg Converter Station Site (West Tenth Street—Alternative 2 [N/S])

Figure A.8-25         Pittsburg Converter Station Plan View (West Tenth Street—Alternative 2 [N/S])

Figure A.8-26         Pittsburg Converter Station Elevation View (West Tenth Street—Alternative 2 [N/S])

Figure A.8-27          Photosimulation of Pittsburg Converter Station (West Tenth Street—Alternative 2 [N/S])

Figure A.8-28          Pittsburg Converter Site (Mirant Alternative)

Figure A.8-29          Pittsburg Converter Station—Plan View (Mirant Alternative)

Figure A.8-30          Pittsburg Converter Station—Elevation View (Mirant Alternative)

Figure A.8-31          Photosimulation of Pittsburg Converter Station (Mirant Alternative)


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