Welcome to the California Public Utilities Commission (CPUC) website
for Pacific Gas and Electric's (PG&E's) proposed Windsor Substation
Project. An application for this project was submitted to the CPUC
on April 21, 2010 (A.10-04-024). The project was reviewed by
CPUC in accordance with the California Environmental Quality Act
(CEQA) and a Mitigated Negative Declaration (MND) was prepared.
This site provides access to public documents and information relevant
to the permitting, CEQA review, and construction of the Windsor
The Final MND was adopted by the CPUC on April 3, 2014 in
Decision D.14-03-031. In accordance with CEQA, a Mitigation Monitoring,
Compliance, and Reporting Plan (MMCRP) was prepared to ensure compliance
with the mitigation measures approved in the MND. The MMCRP is available
PG&E started construction of the Windsor Substation Project
in November 2016.
Notices to Proceed (NTPs) are being issued by CPUC by subsection
of the project as requested by PG&E. NTP #1 for the construction
of the substation component of the project was issued by CPUC on
June 15, 2016, and is available here.
Issuance of NTPs is contingent upon PG&E's compliance with pre-construction
requirements as specified by the approved mitigation measures and
responsible agency permitting requirements.
Other responsible agency permits required for construction, and
their amendments, are listed in the MMCRP (see above). Prior to
construction, PG&E was required to submit the following surveys
and plans/programs. Surveys were field validated by the CPUC EM:
- Sensitive Biological Habitat Survey Reports
- Bird Nesting Survey Reports
- Special-status Bat Survey Reports
- Restoration Plans
- Storm Water Pollution Prevention Plans (SWPPPs)
- Construction Site Monitoring Program (CSMP)
- Worker Environmental Awareness Program Plans
Other compliance plans requiring CPUC and/or permit agency review
and approval included the following:
- Landscaping Plan (available here)
- Spill Prevention Control and Countermeasure Plans (available
- Hazardous Substance Control and Emergency Response Plan (available
and Minor Project Change Review
Construction activities began November 2, 2016. CPUC Environmental
Monitors are monitoring construction activities to ensure that construction
is being conducted in accordance with the approved mitigation measures
and permit conditions. Weekly monitoring reports documenting construction
and compliance can be viewed here.
As final engineering is completed or as construction necessitates,
Minor Project Changes (MPCs) could be submitted for the Project.
Each of these requests will be reviewed by CPUC to ensure that no
new impacts or increase in impact severity would result from the
requested change. All MPCs will be posted on this website.
The originally proposed Windsor Substation Project site was located
on Mitchell Lane in the southern part of the Town of Windsor, Sonoma
County, California. Subsequent to its original Application, PG&E
amended its Application and submitted a Supplemental PEA for substation
sited at a different location. The new site is in the northern part
of the Town, on Old Redwood Highway at Herb Road, between Highway
101 and the Northwestern Pacific Railroad (NWPRR) right of way.
Electrical power would enter the substation by tapping the existing
Fulton No. 1 60 kV power line that parallels the west
side of the NWPRR right of way. Electrical power would leave the
substation as 12 kV via distribution feeder lines, which would
interconnect with the distribution network. Construction involves
the installation of the following components:
- Construction of a 3-bank 115/12 kilovolt substation on 2.6 acres
of a 4.11-acre parcel on Old Redwood Highway at Herb Road in the
Town of Windsor, California. The substation would consist of the
following at full buildout:
- Three 115 kV bus structures
- Six 115 kV circuit breakers
- Three 115/12 kV power transformers
- Eighteen 115 kV disconnecting switches
- Three 12 kV metal-clad switchgear enclosures
- Twelve 12 kV distribution circuits
- Three 30 MVA power transformers
- Connection of the new substation to on the Fulton No. 1
60 kV power line by way of a new tubular steel pole [TSP]
replacing an existing wood pole
- Two 42-foot-high dead-end structures within the substation
supporting the 60 kV power line entering and exiting
- Pole replacement and line work along Old Redwood Highway, Starr
Road, Gumview Road, Wilcox Road, Starr Circle, Railroad Avenue
and Joni Court.
- Underground distribution lines connecting the substation to
existing and future infrastructure.
- Rebuilding approximately 1.5 miles of the existing Fulton No.
1 60 kV power line, requiring replacement 39 wooden poles (with
38 wood poles and 1 steel pole) and installation of 2 new wood
- Reconductoring approximately 1.8 miles of existing distribution
line with 12 kV double-circuit conductor along Old Redwood Highway,
requiring replacement of 44 wooden poles with taller wood poles
and installation of 3 additional wood riser poles.
PG&E filed a PEA with the Application
in April 2010. A Supplemental PEA
was submitted in May 2011. The PEA provides a starting point for
the independent environmental review process conducted by the CPUC.
In addition, PG&E's Notice of an Application for a Permit to
Construct can be found here.
PG&E's Application and PEA were deemed complete for review
by the CPUC on May 20, 2010. However, the PEA was replaced
by the Supplemental PEA, submitted in 2011. The CPUC evaluated the
substation site and related project elements identified in the Supplemental
The CPUC determined that an Initial Study/Mitigated Negative Declaration
(IS/MND) appeared to be the appropriate CEQA document to prepare
for this project. After it was prepared, the Draft IS/MND was published
and the public and agencies had an opportunity to comment on the
document. Based on the Draft IS/MND, CPUC determined that an EIR
was not required.
Study/Mitigated Negative Declaration
On July 15, 2013, the CPUC released a Notice of Intent to Adopt
a Mitigated Negative Declaration for the Windsor Substation Project
showing that the Proposed Project, as mitigated, would not have
any significant effects on the environment. The Draft Mitigated
Negative Declaration and Supporting Initial Study (IS/MND) can be
The Draft IS/MND underwent a public review period from July 15,
2013 through August 14, 2013.
Study/Mitigated Negative Declaration
After the close of the comment period, CPUC prepared a Final Mitigated
Negative Declaration for the Windsor Substation Project. The Final
IS/MND can be viewed here. The study
showed that the Proposed Project, as mitigated, would not have any
significant effects on the environment. The Final MND provides details
on the Proposed Project, evaluates and describes its potential environmental
impacts, identifies those impacts that could be significant, and
presents mitigation measures to avoid or minimize these impacts.
Public Information Meeting
The CPUC Energy Division held a public information meeting on August 16,
2010, to describe the then-proposed project, describe the CEQA process,
and receive public comments on the proposal. Written comments were
submitted at this meeting. Subsequent to the meeting, PG&E identified
its alternate site and submitted a supplemental PEA.
To request additional information, please contact:
Eric Chiang, Project Manager
California Public Utilities Commission
c/o Aspen Environmental Group
235 Montgomery Street, Suite 935
San Francisco, CA 94104-3002