Pacific Gas and Electric Company’s Embarcadero-Potrero 230 kV Transmission Project

(Application A.12-12-004, filed December 11, 2012)


Draft Mitigated Negative Declaration and Supporting Initial Study

These files are in Portable Document Format (PDF). To view them, you will need to download the free Adobe Acrobat Reader if it is not already installed on your PC. Note: For best results in displaying the largest files (see sizes shown in parentheses below for files larger than 3.0 MB), right-click the file's link, click "Save Target As" to download the file to a folder on your hard drive, then browse to that folder and double-click the downloaded file to open it in Acrobat.
Complete Document in One File (19.5MB)
Notice of Intent
Title Page
Table of Contents
1. Mitigated Negative Declaration
1.1 Project Information
1.2 Introduction
1.3 Project Description
1.4 PG&E PEA Alternatives Considered
1.5 CAISO San Francisco Peninsula Reliability Assessment
1.6 Environmental Determination
2. Environmental Determination
2.1 Environmental Factors Potentially Affected
2.2 Environmental Determination
3. Introduction to the Initial Study
3.1 Proposed Project Overview
3.2 Environmental Analysis
3.2.1 CEQA Process
3.2.2 CEQA Lead Agency
3.2.3 Initial Study

4. Project Description (3.8MB)
4.1 Project Title
4.2 Project Sponsor's Name and Address
4.3 Lead Agency Name and Address
4.4 Lead Agency Contact Person and Phone Number
4.5 Project Location
4.6 Surrounding Land Uses and Setting
4.7 General Plan Designation
4.8 Zoning
4.9 Project Overview
4.10 Project Components
4.11 Project Construction
4.12 Operation and Maintenance
4.13 Applicant Proposed Measures
4.14 Other Permits and Approvals
4.15 Electric and Magnetic Fields Summary
Figure 4-1. Project Vicinity
Figure 4-2. Project Location
Figure 4-3. Embarcadero Substation Area
Figure 4-4. Potrero Switchyard Area
Figure 4-5. Potential Staging Locations
Figure 4-6. Typical Duct Bank
Figure 4-7. Typical Manhole
Figure 4-8. Embarcadero HDD Transition Area
Figure 4-9. Potrero HDD Transition Area
Figure 4-10. Southern HDD Transition Manhole Layout
Figure 4-11. Geologic Profile of North Transition from Land to Marine
Figure 4-12. Typical Submarine Cable Layout
Figure 4-13. Cross Section of the Proposed 230 kV XLPE Submarine Cable
Figure 4-14. Potrero Gas-Insulated Switchgear Building Conceptual
Figure 4-15. Proposed Potrero 230 kV Electrical Equipment
Figure 4-16. Potrero Interconnection with 115 kV System
Figure 4-17. Hydroplow
Figure 4-18. HDD Outfall
Figure 4-19. San Francisco Downtown, Pedestrian Magnetic Field Levels (embedded in document)

5. Initial Study
5.1 Aesthetics
Figure 5.1-1. Photograph Viewpoint Locations
Figure 5.1-2a. Photographs of the Potrero Switchyard Site Sheet 1 of 4
Figure 5.1-2b. Photographs of the Potrero Switchyard Site Sheet 2 of 4
Figure 5.1-2c. Photographs of the Potrero Switchyard Site Sheet 3 of 4
Figure 5.1-2d. Photographs of the Potrero Switchyard Site Sheet 4 of 4
Figure 5.1-3a. Existing View from 23rd Street East of Illinois Street
Figure 5.1-3b. Visual Simulation from 23rd Street East of Illinois Street
Figure 5.1-4a. Existing View from 23rd Street at Illinois Street
Figure 5.1-4b. Visual Simulation from 23rd Street at Illinois Street
5.2 Agriculture and Forestry Resources
5.3 Air Quality
5.4 Biological Resources
Figure 5.4-1. Subtidal Habitat
Figure 5.4-2. Herring Spawning and Seal Haulout
5.5 Cultural Resources
5.6 Geology and Soils
Figure 5.6-1. Geologic Map
Figure 5.6-2. Regional Active Fault Map
Figure 5.6-3. Seismic Hazard Map
5.7 Greenhouse Gas Emissions
5.8 Hazards and Hazardous Materials
Figure 5.8-1. Contaminated Sites and Potrero Switchyard
5.9 Hydrology and Water Quality
5.10 Land Use and Planning
Figure 5.10-1. Embarcadero Area Existing Land Use
Figure 5.10-2. Potrero Area Existing Land Use
5.11 Mineral Resources
5.12 Noise
5.13 Population and Housing
5.14 Public Services
5.15 Recreation
5.16 Transportation and Traffic
5.17 Utilities and Service Systems

5.18 Corona and Induced Current Effects

5.19 Mandatory Findings of Significance
Figure 5.19-1. Cumulative Projects
6. Mitigation Monitoring Plan
6.1 Minor Project Changes or Variances
6.2 Dispute Resolution
7. References
8. Response to Comments (section reserved for Final IS/MND)
Appendix A. Emission Calculations
Appendix B. Special-status Plants and Wildlife
Appendix C. List of Preparers


The public review period for the Draft IS/MND begins August 15, 2013, and ends September 16, 2013. Written comments must be received by 5:00 p.m. on Monday, September 16, 2013. Please include your name and address on all comments submitted. Comments can be made to:

Billie Blanchard, CPUC Project Manager
c/o Aspen Environmental Group
235 Montgomery Street, Suite 935
San Francisco, CA 94104-3002

You may also send comments via e-mail to


This page contains tables and is best viewed with Firefox or Internet Explorer. Please report any problems to the Energy Division web coordinator.

Project Home Page - CPUC Environmental Information - CPUC Home