cpucResponse6Feb12 07 by 8tDh90y

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									                                      SUNRISE POWERLINK PROJECT
                                              (A.06-08-010)

                                          SDG&E’S RESPONSE TO
                                          CPUC Data Request No. 6
__________________________________________________________________

Alternatives
ALT-65       a. Many alternative routes were suggested by the public for the Coastal Link.
             Many of these alternatives are proposed to be buried within existing City of San
             Diego roadways. In order to determine whether these routes are feasible from a
             space available standpoint, we need to know generally if there is adequate
             space within the roadway not already occupied by other buried utility lines. We
             have conducted research with the City of San Diego regarding buried utilities. If
             SDG&E is aware of any major constraints in the roadway segments listed below,
             please provide that information.

                     b. It would also be helpful to us to know where Sempra or SDG&E have
                     infrastructure buried in these roadways. Please provide us with this information
                     for the following roads and roadway segments:

                          Carmel Valley Road from east of Black Mountain Road to the intersection of
                           Via Abertura and Carmel Valley Road
                          Black Mountain Road from SR 56 to Mercy Road
                          Pomerado Road from Scripps Poway Parkway to I-15
                          Miramar Road from I-15 to the 805
                          Bike path along the south side of SR 56 in the vicinity of Black Mountain
                           Road
                          Kearny Villa Road from Miramar Road north to Black Mountain Road
                          Activity Road from Black Mountain Road to Camino Ruiz
                          Camino Ruiz from Activity Road to Miralani Drive
                          Miralani Drive from Camino Ruiz to Arjons Drive
                          Arjons Drive from Miralani Drive to Trade Place
                          Trade Place from Arjons Drive to Camino Santa Fe
                          Camino Santa Fe to Carroll Road/Carroll Canyon Road to Scranton Road.
                          Alpine Boulevard from Willows Avenue exit (I-8) to its western terminus.

RESPONSE:

b) The embedded tables below provide information on SDG&E gas and electric facilities
located in the requested roadways. Please note that for Miramar Road, information is
only provided between I-15 and Black Mountain Road based on a revised description
provided by Aspen.


   ALT-65b_Gas &
Electric Distribution Conflicts.pdf



This information is based on SDG&E mapping and not as-built construction drawings.
The actual location and number of facilities may vary from what is provided in the tables.
To obtain as-built information for SDG&E utilities in all of the requested roadways would
take several months of additional research.
                                                   1
                             SUNRISE POWERLINK PROJECT
                                     (A.06-08-010)

                                 SDG&E’S RESPONSE TO
                                 CPUC Data Request No. 6
__________________________________________________________________

ALT-66       Please provide preliminary tower locations for the following alternative routes.
             We will provide GIS shapefiles for these routes to ensure that you have the most
             current routing.

                Interstate 8 Alternative (ending at its intersection with the Route D Alternative
                 where it crosses I-8)
                Route D Alternative (in segments that we modified to avoid residential areas)
                West of Forest Alternative
                SDG&E Bullfrog Farms Alternative
                Huff Road Bullfrog Farms Alternative

RESPONSE: Preliminary structure locations are provided for the requested routes (with
the exception of the Interstate 8 Alternative) on GIS shapefiles emailed to CPUC and
Aspen on 02/09/07. Structure locations for the Interstate 8 alternative will be provided
after receiving additional information from CPUC/Aspen. The structure locations
provided are based on preliminary survey data and engineering. The preliminary 230kV
and 500kV tower locations are based on structures without 69kV underbuild.




                                           2
                               SUNRISE POWERLINK PROJECT
                                       (A.06-08-010)

                                   SDG&E’S RESPONSE TO
                                   CPUC Data Request No. 6
__________________________________________________________________

ALT-67           Please describe the transmission line and tower configurations currently in the
                 SDG&E’s Talega-Escondido corridor, and also describe the configuration that
                 would exist if an additional 230 kV circuit were added.

RESPONSE: The existing 230kV transmission line from Talega to Escondido (TL23030)
is located within a 300-foot SDG&E transmission right-of-way (ROW). TL23030 is 51
miles long on total of 213 structures (see table below for structure types).

 Structure type                        Quantity
 Double Circuit Lattice Steel
                                       185
 Towers
 Double Circuit Steel Poles            27
 Single Circuit 3-Pole Wood
                                       1
 Structure

Steel pole locations are as follows:
-6 steel poles at the I-15 crossing.
-20 steel poles for approximately 3.6 miles beginning at Escondido Substation.
-1 steel pole at Talega Substation

The 3-pole wood structure is located approximately 2.5 miles east of the I-15 crossing.
Photos of typical existing structures are embedded below.


ALT-67_TL23030_Str
    uctures.pdf


One side of 32 towers is occupied by a 69kV transmission circuit (TL6932). This segment
is approximately 7.6 miles in length and is between SR-76 and Old Castle Road. To
accommodate a new 230kV circuit on the existing towers, TL6932 will need to be
relocated. All other steel structures have a vacant position that is available for a new
230kV circuit.

The initial work required to install a new 230kV circuit will consist of improving existing
access roads and construction of new spur roads and structures pads for the relocation
of TL6932. It is anticipated that this work will be completed within the existing right-of-
way. New steel pole structures will then be installed for the relocation of TL6932.
Additionally, the 3-pole wood structure will have to be replaced by a 230kV double circuit
steel pole or lattice tower. Modifications to the existing structures may be required;
however the extent of these modifications cannot be determined until details of the new
230kV circuit are available. Insulators and hardware for the new transmission line will be
installed on all 213 structures followed by installation of new conductors.

In addition to the transmission line work, existing substations will have to be upgraded in
order to accommodate the new 230kV circuit. Escondido Substation and Talega
Substation will require new 230kV terminal positions. Depending upon the rating of the


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                          SUNRISE POWERLINK PROJECT
                                  (A.06-08-010)

                              SDG&E’S RESPONSE TO
                              CPUC Data Request No. 6
__________________________________________________________________

new 230kV circuit there may be overloaded breakers on the system that would have to be
replaced.




                                       4
                            SUNRISE POWERLINK PROJECT
                                    (A.06-08-010)

                                SDG&E’S RESPONSE TO
                                CPUC Data Request No. 6
__________________________________________________________________

ALT-70      Some of the Coastal Link alternatives suggested by the public would require
            installation of additional overhead lines within existing SDG&E corridors. Please
            provide for us the following information for each of the corridors identified below:
            (a) a text description of the existing configuration of facilities within the corridor;
            (b) a diagram or photograph showing existing towers and circuits (as a cross-
            section, viewed from perpendicular to the corridor); (c) total width of the corridor
            in SDG&E’s control; (d) spacing between existing lines and edge of ROW.
            Please refer to Figures 6 from the recent Alternatives Scoping Notice and provide
            that information for portions of SDG&E corridors identified for the following
            alternatives:
            a. MCAS Miramar Alternative (Figure 6)
            b. Carmel Valley Road Alternative (overhead segments, Figure 6)


RESPONSE:

a) MCAS Miramar Alternative

      (a) Beginning at the point where the underground alternative intersects the
      existing 200 ft. SDG&E right-of-way, the overhead transmission corridor consists
      one (1) 138kV circuit on double circuit 138kV lattice towers and one (1) 230kV
      circuit on double circuit 230kV steel poles. There is one vacant position on the
      138kV towers. On the 230kV poles, the conductors of each phase of the 230kV
      circuit are split to occupy both positions on the pole. The right-of-way also
      contains underground gas and fuel lines. This segment is approximately 0.3 miles
      in length and ends approximately 300 ft. south of the railroad tracks.

      From 300 ft. south of the railroad tracks to approximately 0.26 miles north of
      Miramar Road the corridor consists of two (2) single circuit 69kV transmission
      lines on wood poles, one (1) 138kV circuit on double circuit 138kV lattice towers,
      and one (1) 230kV circuit on double circuit 230kV steel poles. There is one vacant
      position on the 138kV towers. On the 230kV poles, the conductors of each phase
      of the 230kV circuit are split to occupy both positions on the pole. The corridor
      also has distribution circuits and telecommunications lines underbuilt on the 69kV
      transmission lines. The right-of-way also contains underground gas and fuel
      lines. This segment is approximately 1.15 miles in length.

      From 0.26 miles north of Miramar Road to approximately 0.25 miles south of
      Sorrento Valley Road, there is one additional 69kV circuit which is attached to the
      69kV transmission line on the east side of the right-of-way. The configuration of
      the other transmission lines and facilities remains the same as the corridor
      between the railroad tracks and Miramar Road.




                                          5
                           SUNRISE POWERLINK PROJECT
                                   (A.06-08-010)

                               SDG&E’S RESPONSE TO
                               CPUC Data Request No. 6
__________________________________________________________________

      From 0.25 miles south of Sorrento Valley Road to Sorrento Valley Road, the
      corridor is the same as the previous segment to the south except that there is not
      a 69kV transmission line on the west side of the right-of-way.

      From Sorrento Valley Road to Lusk Boulevard, the corridor consists of a single
      circuit 69kV transmission line with telecommunications underbuild on wood
      poles, one (1) 138kV circuit on double circuit 138kV lattice towers, and one (1)
      230kV circuit on double circuit 230kV steel poles. There is one vacant position on
      the 138kV towers. On the 230kV poles, the conductors of each phase of the 230kV
      circuit are split to occupy both positions on the pole.      The right-of-way also
      contains underground gas and fuel lines. The segment length is approximately
      0.65 miles.

      From Lusk Boulevard to Sorrento Valley Boulevard, the corridor consists of one
      (1) 138kV circuit and one (1) 69kV circuit on double circuit 138kV lattice towers,
      and one (1) 230kV circuit on double circuit 230kV steel poles. On the 230kV
      poles, the conductors of each phase of the 230kV circuit are split to occupy both
      positions on the pole. The right-of-way also contains underground gas and fuel
      lines. The segment length is approximately 0.6 miles.

      From Sorrento Valley Boulevard to Penasquitos Substation, the corridor consists
      of a double circuit 69kV transmission line with telecommunications underbuild on
      wood poles, one (1) 138kV circuit and one (1) 69kV circuit on double circuit 138kV
      lattice towers, and one (1) 230kV circuit on double circuit 230kV steel poles. On
      the 230kV poles, the conductors of each phase of the 230kV circuit are split to
      occupy both positions on the pole. The right-of-way also contains underground
      gas and fuel lines. The segment length is approximately 0.65 miles.

      The descriptions provided above are typical for each segment; however, there are
      some variations in structure types and configurations.

      (b) – (d) Photos and typical cross sections of the corridor are attached. The cross
      sections provide the right-of-way dimensions and spacing between structures.


        ALT-70a_MCAS
        UG-OH ALT.pdf


b) Carmel Valley Road Alternative (overhead segments, Figure 6)

      (a) The underground portion of this alternative is between two overhead
      transmission corridors: one to the north of the existing SDG&E Chicarita
      Substation and the other north of the existing transmission line junction known as
      Penasquitos Junction.

      The transmission corridor north of Chicarita Substation is a 200 ft. right-of-way
      with a single circuit 138kV transmission line on wood H-frames and double circuit

                                       6
                          SUNRISE POWERLINK PROJECT
                                  (A.06-08-010)

                             SDG&E’S RESPONSE TO
                             CPUC Data Request No. 6
__________________________________________________________________

    230kV steel poles supporting one (1) 69kV circuit and one (1) 230kV circuit. This
    segment is approximately 1.1 miles in length.

    From 1.1 miles north of Chicarita Substation to approximately 2.4 miles north of
    Chicarita Substation, there is a single circuit 138kV transmission line with
    distribution underbuild on wood H-frames and double circuit 230kV lattice towers
    supporting one (1) 69kV circuit and one (1) 230kV circuit.

    The transmission corridor north of Penasquitos Junction is a 100 ft. right-of-way
    with a single circuit 138kV transmission line with telecommunications underbuild
    on wood H-frames and a double circuit 230kV transmission line on lattice towers.
    This segment is approximately 2.2 miles in length.

    (b) – (d) Photos and typical cross sections of the corridor are attached. The cross
    sections provide the right-of-way dimensions and spacing between structures.


      ALT-70b_Carmell
    Valley Rd UG-OH.pdf




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