APS 2013 Annual Report Download - page 44

Table of Contents
interests in Palo Verde. The other participants are Salt River Project (17.49%), SCE (15.8%), El Paso (15.8%), Public Service Company
of New Mexico (10.2%), Southern California Public Power Authority (5.91%), and Los Angeles Department of Water & Power (5.7%).
The plant is operated by APS.
(c) The other participants are Salt River Project (10%), Public Service Company of New Mexico (13%), Tucson Electric Power Company
(7%) and El Paso (7%). The plant is operated by APS. As discussed under “Business of Arizona Public Service Company — Energy
Sources and Resource Planning — Generation Facilities — Coal-Fueled Generating Facilities — Four Corners” in Item 1, in December 2013
APS acquired SCE’s 48% interest in Units 4 and 5, and closed Units 1, 2 and 3.
(d) The other participants are Salt River Project (21.7%), Nevada Power Company (11.3%), the United States Government (24.3%), Tucson
Electric Power Company (7.5%) and Los Angeles Department of Water & Power (21.2%). The plant is operated by Salt River Project.
See “Business of Arizona Public Service Company — Environmental Matters” in Item 1 with respect to matters having a possible impact on the
operation of certain of APS’s generating facilities.
See “Business of Arizona Public Service Company” in Item 1 for a map detailing the location of APS’s major power plants and principal
transmission lines.
Transmission and Distribution Facilities
Current Facilities. APS’s transmission facilities consist of approximately 5,908 pole miles of overhead lines and approximately 49 miles of
underground lines, 5,685 miles of which are located in Arizona. APS’s distribution facilities consist of approximately 11,399 miles of overhead lines and
approximately 17,758 miles of underground primary cable, all of which are located in Arizona. APS shares ownership of some of its transmission facilities
with other companies. The following table shows APS’s jointly-owned interests in those transmission facilities recorded on the Consolidated Balance Sheets at
December 31, 2013:
Percent Owned
(Weighted-Average)
Morgan — Pinnacle Peak System 64.5%
Palo Verde — Estrella 500kV System 50.0%
Round Valley System 50.0%
ANPP 500kV System 34.2%
Navajo Southern System 22.2%
Four Corners Switchyards 48.1%
Palo Verde — Yuma 500kV System 18.0%
Phoenix — Mead System 17.1%
Palo Verde — Morgan System 90.0%
Expansion. Each year APS prepares and files with the ACC a ten-year transmission plan. In APS’s 2014 plan, APS projects it will develop 275
miles of new lines over the next ten years. One significant project currently under development is a new 500kV path that will span from the Palo Verde hub
around the western and northern edges of the Phoenix metropolitan area and terminate at a bulk substation in the northeast part of Phoenix. The project
consists of four phases. The first phase,
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