12 unchanged sentences
Combustion Turbine:
−Removed: Ocotillo (d) 7 Gas Peaking 620
+Added: Ocotillo 7 Gas Peaking 630
Saguaro 3 Gas Peaking 189
6 unchanged sentences
Total Combustion Turbine 1,618
−Removed: Cotton Center (e) 1 Solar As Available 17
−Removed: Hyder I (e) 1 Solar As Available 17
−Removed: Paloma (e) 1 Solar As Available 17
+Added: Cotton Center 1 Solar As Available 17
+Added: Hyder I 1 Solar As Available 17
+Added: Paloma 1 Solar As Available 17
Chino Valley 1 Solar As Available 20
−Removed: Gila Bend (e) 1 Solar As Available 36
−Removed: Hyder II (e) 1 Solar As Available 14
−Removed: Foothills (e) 1 Solar As Available 38
+Added: Gila Bend 1 Solar As Available 36
+Added: Hyder II 1 Solar As Available 14
+Added: Foothills 1 Solar As Available 38
Luke AFB 1 Solar As Available 11
−Removed: Desert Star (e) 1 Solar As Available 10
+Added: Desert Star 1 Solar As Available 10
Red Rock 1 Solar As Available 44
7 unchanged sentences
See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Generation Facilities — Nuclear” in Item 1 for details regarding leased interests in Palo Verde.
−Removed: The other participants are Salt River Project, SCE, El Paso Electric Company, Public Service Company of New Mexico, Southern California Public Power Authority, and Los Angeles Department of Water & Power.
+Added: The other participants are Salt River Project, SCE, El Paso Electric Company, Public Service Company of New Mexico, Southern California Public Power Authority, and Los Angeles Department of Water and Power.
(c) The other participants are Salt River Project (10%), Public Service Company of New Mexico (13%), Tucson Electric Power Company (7%) and NTEC (7%).
The plant is operated by APS.
−Removed: (d) Ocotillo Steam Units 1 and 2 were retired on January 10, 2019.
−Removed: Units 3 through 7 all went into service on or prior to May 30, 2019, which increased generation capacity by 510 MW.
−Removed: (e) APS is under contract and currently plans to add battery storage at these AZ Sun sites.
−Removed: See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Energy Storage” above for details related to these and other energy storage agreements.
+Added: (d) See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Energy Storage” above for details related to APS’s energy storage facilities and agreements.
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.
2 unchanged sentences
Current Facilities .
−Removed: As of February 1, 2024, APS’s transmission facilities consist of approximately 5,832 pole miles of overhead lines and approximately 85 miles of underground lines, 5,772 miles of which are located in Arizona.
+Added: As of January 24, 2025, APS’s transmission facilities consist of approximately 5,817 pole miles of overhead lines and approximately 86 miles of underground lines, 5,757 miles of which are located in Arizona.
APS’s distribution facilities consist of approximately 11,317 miles of overhead lines and approximately 24,031 miles of underground primary cable (20,893 when excluding abandoned conductor), all of which are located in Arizona.
4 unchanged sentences
(Weighted-Average)
−Removed: Morgan — Pinnacle Peak System 63.2 %
−Removed: Palo Verde — Rudd 500kV System 50.0 %
−Removed: Round Valley System 50.0 %
−Removed: ANPP 500kV System 33.4 %
+Added: Arizona Nuclear Power Project 500kV System 33.3 %
Navajo Southern System 24.7 %
−Removed: Four Corners Switchyards 57.5 %
Palo Verde — Yuma 500kV System 25.5 %
+Added: Four Corners Switchyards 58.0 %
Phoenix — Mead System 17.1 %
+Added: Palo Verde — Rudd 500kV System 50.0 %
+Added: Morgan — Pinnacle Peak System 63.2 %
+Added: Round Valley System 50.0 %
Palo Verde — Morgan System 87.5 %
6 unchanged sentences
In APS’s 2025 Ten-Year Plan, APS projects it will develop 184 miles of new transmission lines over the next 10 years.
−Removed: Additionally, APS plans to upgrade 730 miles of existing transmission lines over the same horizon.
−Removed: The 2024 Ten-Year Plan includes a new 28-mile 500kV line from the Jojoba substation to the Rudd substation.
+Added: Additionally, APS plans to upgrade 687 miles of existing transmission lines over the same
+Added: The 2025 Ten-Year Plan includes a 28-mile 500kV line from the Jojoba substation to the Rudd substation.
The purpose of this 500kV line project is to bring in a new source to the west and southwest parts of the Phoenix metropolitan area which is experiencing rapid economic development.
15 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.