Sycamore to Peñasquitos
230 kV Transmission Line
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Did you know?
• The California Independent System Operator
(CAISO) identified this proposed line as a
SDG&E® submitted an application
to the California Public Utilities
Commission (CPUC) for approval
to construct a new 230 kV
transmission line that would
run between the Sycamore
Canyon and Peñasquitos
Substations. The new line will
help improve reliability and
integrate more renewable
energy into our system which
helps meet state mandated goals.
priority in its 2012-2013
Transmission Plan.
SDG&E’s proposed Sycamore to Peñasquitos
Through a competitive
230 kV line is divided into the following
solicitation process,
primary components:
SDG&E was selected to design, construct and own the line.
• SDG&E’s plans for the proposed line
• Segment A – Replace existing 138 kV wood
H-frame structures with new 230 kV steel
poles (8.3 miles, all located in SDG&E’s
existing right-of-way).
includes using existing
• Segment B - Install new 230 kV underground
right-of-way as well as
transmission line along Carmel Valley Road
constructing a new
(2.8 miles, all located in SDG&E’s existing
underground section
franchise position).
along Carmel Valley Road.
• Along the proposed line,
existing wood poles will be replaced with
galvanized steel poles.
The proposed transmission line will help
us maintain reliability in neighborhoods
throughout the region.
• Segment C - Install new 230 kV conductor on
existing 230 kV steel structures (2.2 miles,
all located in SDG&E’s existing right-of-way).
• Segment D - Install new 230 kV conductor
Project purpose and need
A 230 kV transmission line connecting
the Sycamore Canyon and Peñasquitos
Substations is critically needed. As originally
identified by CAISO as well as Governor
Brown’s statewide task force, this new line is
necessary to ensure the region has a reliable
transmission grid due to the unexpected loss
of generation at the San Onofre Nuclear
Generating Station. The new transmission line
is also needed to deliver increasing amounts
on existing 230 kV steel lattice towers and
of renewable energy and to deliver power
relocate two existing 69 kV power lines to
safely and reliably to regional load centers.
new tubular steel poles (3.3 miles, all in
The proposed project will improve the
SDG&E’s existing right-of-way).
delivery of renewable energy to the
• Minor modifications of the existing Sycamore
San Diego coastal area and help meet the
Canyon and Peñasquitos Substations to
forecasted increase in electricity demand
allow for connection of the new 230 kV
in the San Diego region.
transmission line. Upgrades to several
additional substations will also be required.
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Benefits
SDG&E’s proposed project that would connect the Sycamore
Some of the key benefits of the proposed project are:
Canyon and Peñasquitos Substations in a different manner
than SDG&E’s proposed project.
• Improved reliability and integration of existing renewable
energy into our system.
Proposed Project Schedule
• Use of existing electric utility corridors, structures, access
(CPUC alternatives would result in a longer schedule)
roads and work areas.
Construction start date: June 2016
In-service date: May 2017
• Fire “hardening” by replacing existing wood structures
with steel.
Public Affairs contact
Permitting
Todd Voorhees
The CPUC has jurisdiction over the final design, construction
Regional Public Affairs Manager
and route location of this proposed project. In April 2014,
sxpq@semprautilities.com
SDG&E filed an application with the CPUC for a Certificate
1-844-765-6388
of Public Convenience and Necessity. The application
Additional information
included a Proponent’s Environmental Assessment. The
For more details about this project, please
proposed project may require additional agency approvals
visit sdge.com/key-energy-initiatives.
including, approval from MCAS Miramar since the Sycamore
Canyon Substation is located on the base and the Coastal
For information about the CPUC’s environmentally preferred
Commission for the portion within the coastal zone.
alternative as outlined in its Draft Environmental Impact
Report, please visit www.cpuc.ca.gov/Environment/info/
On September 17, 2015, the CPUC issued its Draft
panoramaenv/Sycamore_Penasquitos/index.html.
Environmental Impact Report articulating alternatives to
Existing Transmission Lines
Proposed Project Segments
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Peñasquitos Substation
Mira Mesa Blvd.
P.O. Box 129831 | San Diego, CA 92112-9831 | 1-800-411-7343 | Connect at sdge.com
© 2016 San Diego Gas & Electric Company. All copyright and trademark rights reserved. S1610006 0216 200
Segment (3.3 miles) Replacement
of existing wood
D
H-frames with new
69 kV steel poles
Scripps Poway Pky.
.
Car
Segment (2.8 miles) New
underground 230 kV line
B
in existing franchise
position (Carmel Valley
Road)
Segment (2.2 miles) New 230 kV
conductor on existing
C
steel lattice towers
56
56
Segment (8.3 miles) Replacement
of existing wood
A
H-frames with new
230 kV steel poles
A
Sycamore Canyon Substation