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PUC > Energy > California Environmental Quality Act > Current Projects

Collinsville 500/230 kilovolt Substation Project

Application No. A.24-07-018

Last Update: August 7, 2025




 



Proponent's Environmental Assessment and Attachments

Proponent's Environmental Assessment and Attachments (Revised January 2025 - June 2025)

LSPGC Application Deficiency Reports & Data Requests


CPUC Request

LSPGC Response
Response Attachments

 

 

 

 

 

CPUC Deficiency Review #1 (August 28, 2024)

LSPGC Response #1 to Deficiency Report #1 (September 30, 2024)
Attachment A: PG&E Preliminary Scope
Attachment B: PG&E Substation Locations (Confidential Data Witheld)
Attachment C: Vegetation Clearance Table
Attachment D: Ultimate Substation Buildout GIS Files (Confidential Data Withheld)
Attachment E: FAA Determinations
Attachment F: Substation Grading GIS Files (Confidential Data Withheld)
Attachment G: Montezuma Gas Pipeline KMZ (Confidential Data Withheld)
Attachment H: High Resolution Images
Attachment I: O&M Trim Information
Attachment J: Revised Noise and Vibration Impact Assessment
Attachment K: Transition Structure Lighting Example
Attachment L: Revised Figure 3-4
LSPGC Response #2 (October 18, 2024)
Aquatic Resources Technical Report
LSPGC Response #3 (October 31, 2024)
Attachment A: Revised Visual Resources Technical Report (including updated simulations and high resolution photos)
Attachment B: Collinsville Substation Health Risk Assessment
Attachment C: Updated Cultural Resources Technical Report, including GIS data (Confidential Data Withheld)
Attachment D: Substation Fence and Driveway Profile Diagram and Fencing Information
LSPGC Response #4 (November 15, 2024)
DOD Clearinghouse Response Letter
Sediment Dispersion Modeling
LSPGC Response #5 (January 30, 2025) Attachment A: Geotechnical Factual Report
Attachment B: Collinsville to Pittsburg Submarine Cable Sedbed Morpohology Analysis
Deficiency and Data Request Tracker
LSPGC Response #6 (July 8, 2025) Attachment A: Collinsville-Pittsburg 230kV - DRAFT_Collinsville Onshore Geotech Report-1 July 2025
Attachment B: NA245123 500 kV Collinsville Substation Geotechnical Engineering Report DRAFT
CPUC Deficiency Review #2 (November 14, 2024) LSPGC Response #1 (December 4, 2024)
Attachment DR 1a: Collinsville_Project_Components_EditedLSP_12-02-2024 (Confidential Data Withheld)
Attachment DR 1b: Collinsville_Project_Components_EditedLSP_12-17-2024 (Confidential Data Withheld)
LSPGC Response #2 (December 23, 2024) Attachment DR-2a:_Updated Table 3-8 and Table 3-9
Attachment DR-2c:_Grading Elevations
Attachment DR-6:_Revised AQ Tables
CPUC Data Request #1 (December 4, 2024)
LSPGC Response #1 (January 3, 2025)

LSPGC Response #2 (February 19, 2025) Attachment A: Wire Frame Diagram
Attachment B: Updated Visual Simulation
Attachment C: Updated HRA
CPUC Data Request #2 (March 7, 2025) LSPGC Response #1 (March 18, 2025) Revised CV Vis Sim_V2 - Plaza Marina 20250314S
Revised CV Vis Sim_V3 - Collinsville Road 20250318S
Revised CV Vis Sim_V3 - Stratton Lane 20250318S
Reducing Avian Collisions with Powerlines
Suggested Practices for Avian Protection On Power Lines: The State of the Art in 2006
LSP_2023_Bathymetry (Confidential Data Withheld)
PG&E Transposition Structures_Update_031325 (Confidential Data Withheld)
Updated Figure 2-6 Proposed LSPGC Collinsville Substation Grading Plan
Updated Figure 2-12 Diagram of Typical Underground Duct Bank
LSPGC Response #2 (March 20, 2025) Active Mining Lease (Confidential Data Withheld)
USACE Channels (Confidential Data Withheld)
LSPGC Response #3 (April 2, 2025) Attachment A: Submarine Depths (Confidential Data Withheld)
Attachment B: Land Use GIS (Confidential Data Withheld)
Attachment C: Alternative Substation Site Analysis (Confidential Data Withheld)
Attachment D: Landing Location Selection (Confidential Data Withheld)
Attachment E: Land Ownership Parcel Data (Confidential Data Withheld)
Attachment F: Submarine Installation Methods (Confidential Data Withheld)
PG&E Response #1 (March 7, 2025)  
CPUC Data Request #3 (April 10, 2025) PG&E Response #1 (April 24,2025) Attachment A: LSP CV Substation Components 20250424S (Confidential Data Withheld)
Attachment B: LSPGC Induction Study Report
Attachment C: Jet Sled Hydroplow Technology
Attachment D-1: DR-8 Wind Turbine Throw Distances
Attachment D-2: DR-8 Wind Turbine Throw Distances GIS (Confidential Data Withheld)
Attachment E: DR-10_Shoreline Trenching Narrative
LSPGC Response #1 (April 24, 2025)
LSPGC Response #2 (June 19, 2025) 24-99 Collinsville Substation HRA_0619255
Collinsville HRA_Attachment A
Collinsville HRA_Attachment B
Collinsville HRA_Attachment C
Collinsville HRA_Attachment D
Collinsville HRA_Attachment E
Collinsville HRA_Attachment F
CPUC Data Request #4 (May 9, 2025) LSPGC Response #1 (May 23, 2025)

Attachment A: Submarine Cable Installation using Vertical Injector Technology
Attachment B-1: Staging Areas (Confidential Data Withheld)
Attachment B-2: Substation Property (Confidential Data Withheld)
Attachment C: Alternative 230 kV Submarine Segment Alignment (Confidential Data Withheld)
Attachment D: Alternative 230 kV Overhead Segment Alignment (Confidential Data Withheld)
Attachment E-1: Horizontal Directional Drilling Description
Attachment E-2: HDD Work Areas (Confidential Data Withheld)
Attachment F: Kirby Hills Fault Research Paper
Attachment G: Nearby Infrastructure

PG&E Response #1 (May 23, 2025)
LSPGC Response #2 (June 6, 2025) Attachment A: CV Project Description Schedule and Equipment Updates
Attachment 1.3-A: FINAL LSP CV Design Update 1_3-A AQ and GHG Calcs 20250606S
LSPGC Response #3 (June 19, 2025) California Historical Resources Information System Cultural Resource Information (Confidential Data Withheld)
PG&E Response #3 (June 23, 2025) Attachment A: Collinsville Loop - 500kv Monopole Example - DELTA SUSP.POL
PG&E Response #4 (July 2, 2025) Attachment A: Collinsville Bumble Bee Habitat Assessment 2025
PG&E Response #5 (July 7, 2025) Attachment A: SMUD 3.3_Biological Resources
Attachment B: Attachment B 2024_SPUT_SMUD_Incident Spreadsheet_2024 Annual Report (USFWS form 3-202-17)_2
Attachment C: Attachment B SMUD Solano SPUT 11th Annual Report_2024.01.08
Attachment D: Attachment B Solano SPUT_SMUD 9th Annual Report_2021
Attachment E: Attachment B SPUT_SMUD 8th Annual Report_2021.01.05
Attachment F: SMUD 2022 Annual SPUT Report (MB189818-0)_Cover Letter
Attachment G: SMUD 2024 Annual SPUT Report (MB189818-0)_Cover Letter
CPUC Data Request #5 LSPGC Response #1 (June 20, 2025) Attachment A: Alternative Site A Potential Interference with SMUD Microwave Tower
Attachment B: ADLS Radar Tower Location
Attachment C: Grading and Activity Level for Alternative Substation Sites
2025-06-13_Collinsville Rare Plant Survey Info + GIS (Confidential Data Withheld)
PG&E Response #1 (June 20, 2025)  
CPUC Data Request #6 LSPGC Response #1 (June 27, 2025) Attachment A: Waterline GIS (Confidential Data Withheld)
Attachment B: FINAL LSP CV Design Update 1_3-A AQ and GHG Calcs 20250627S
Attachmemt C: CV Project Description Schedule and Equipment Updates_06272025
Attachment D: Alternative Submarine Route Dredge Impact (Confidential Data Withheld)
Attachment E: Collinsville_Alt Submarine Installation Narrative_06272025
CPUC Data Request #7 LSPGC Response #1 (July 15, 2025) Attachment A: FINAL LSP CV Attach 1_3-A AQ and GHG Calcs 20250711S
Attachment B: Collinsville Substation HRA_Clean_071125
CPUC Data Request #8

LSPGC Response #1 (August 1, 2025)

PG&E Response #1 (August 4, 2025)

Attachment A: Alternative 12kV Distribution Structures (Confidential Data Withheld)
Attachment B: Road Usage (Confidential Data Withheld)
Attachment C: Alternative Staging Yards (Confidential Data Withheld)

PG&E Data Requests


CPUC Request
PG&E Response
Response Attachment
CPUC Data Request #1 (September 27, 2024)
PG&E Response #1 (November 8, 2024)
FINAL LSP Collinsville PEA 3 PD 11.08.24 PGE Comments
CPUC Data Request #2 (November 14, 2024)
PG&E Response #2 (December 5, 2024)
Collinsville_PGE Data Request 2_Attachments_12.5.24
FINAL LSP Collinsville PEA 3 PD 12.09.24 PGE Comments