California Public Utilities Commission

San Diego Gas & Electric (SDG&E)

Silvergate Transmission Substation Project

Draft Environmental Impact Report


The following are PDF documents for public review:

Cover

EXECUTIVE SUMMARY

Table of Contents

Section A

Section B

Section C

Section D.1

Section D.2 Air Quality

Section D.3 Biological Resources

Section D.4 Cultural Resources

Section D.5 Geology Soils and Paleo

Section D.6 Hydrology and Water Quality

Section D.7 Land Use and Recreation

Section D.8 Noise and Vibration

Section D.9 Public Health and Safety

Section D.10 Public Services and Utilities

Section D.11 Population and Housing

Section D.12 Transportation and Traffic

Section D.13 Visual

Section E Alternatives

Section F

Section G Mitigation Monitoring

Section H Public Participation

Section I Rpt Prep

Report Cover 11x11

Report Cover 8x10 Appendices

Report Cover 8x10 Executive Summary

ES-1 Vicinity Project Overview

ES-2 Alternatives Considered

B-1 Regional Location

B-2 Vicinity Project Overview

B-3 Silvergate Substation

B-4 Underground Portion TL13815

B-5 Proposed Silvergate Siteplan

B-6 Proposed Silvergate Elevations

B-7 Proposed Silvergate Landscape Plan

B-8 Proposed Transmission Configuration

B-9 Typical 69kV Cable Riser Pole

B-10 Typical Duct Bank Configuration

B-11 Typical 230kV Cable Riser Pole

B-12 Typical 138kV Cable Riser Pole

B-13 Typical 138kV Underground Manhole Vault

B-14 Proposed Silvergate Demolition Plan

B-15 Proposed Silvergate Grading Plan

B-16 Typical Underground Construction Process

B-17 Typical Open Trench Construction

B-18 Horizontal Directional Drilling Process

C-1 Alternatives Considered

C-2 GIS Technology Alternative

C-3 Open Trench Method

C-4 Horizontal Directional Drilling

C-5 Main Street Expansion to SDGE Prop

C-6 Main Street Expansion to Sampson Street

C-7 Use of Silvergate Sub Property

C-8 Use of Adjacent Property

C-9 Oldtown Mission Upgrade Alt

C-10 Special Protection System Alt

D3-1 Special Management Areas BIO

D3-2 Southbay to Sweetwater BIO

D3-3 Sweetwater to Silvergate BIO

D5-1 Geologic Hazards

D6-1 Hydrology

D7-1 Regional Jurisdiction LANDUSE

D7-2-1 Silvergate Substation LANDUSE

D7-2-2 Southbay to Sweetwater LANDUSE

D7-2-3 Sweetwater to Silvergate LANDUSE

D7-3 Community Planning Areas LANDUSE

D13-1A KOP1 Existing Photo

D13-1B KOP1 Simulation Photo

D13-2A KOP2 Existing Photo

D13-2B KOP2 Simulation Photo

D13-3A KOP3 Existing Photo

D13-3B KOP3 Simulation Photo

D13-4A KOP4 Existing Photo

D13-4B KOP4 Simulation Photo

D13-5A KOP5 Existing Photo

D13-5B KOP5 Simulation Photo

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