8 unchanged sentences
Combined Cycle:
−Removed: Redhawk (e) 2 Gas Load Following 1,088
+Added: Redhawk (d) 2 Gas Load Following 1,088
West Phoenix 5 Gas Load Following 887
1 unchanged sentence
Combustion Turbine:
−Removed: Ocotillo (d) 7 Gas Peaking 620
+Added: Ocotillo (e) 7 Gas Peaking 620
Saguaro 3 Gas Peaking 189
−Removed: Douglas/Fairview 1 Oil Peaking 16
+Added: Douglas 1 Oil Peaking 16
Sundance 10 Gas Peaking 420
24 unchanged sentences
The plant is operated by APS.
−Removed: (d) Ocotillo Steam Units 1 and 2 were retired on January 10, 2019.
+Added: (d) Redhawk generation capacity increased by 104 MW following the Advanced Gas Path upgrade installed on both units.
+Added: (e) Ocotillo Steam Units 1 and 2 were retired on January 10, 2019.
Units 3 through 7 all went into service on or prior to May 30, 2019, which increased generation capacity by 510 MW.
−Removed: (e) Redhawk generation capacity increased by 104 MW following the Advanced Gas Path upgrade installed on both units.
(f) APS is under contract and currently plans to add battery storage at these AZ Sun sites.
2 unchanged sentences
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.
−Removed: 4CA, a wholly-owned subsidiary of Pinnacle West, purchased El Paso’s 7% interest in Units 4 and 5 of Four Corners on July 6, 2016, and subsequently sold the interest to NTEC on July 3, 2018.
−Removed: See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Generation Facilities — Coal-Fueled Generating Facilities — Four Corners” in Item 1 and “Four Corners — 4CA Matter” in Note 11 for additional information about 4CA’s interest in Four Corners.
Transmission and Distribution Facilities
Current Facilities .
−Removed: APS’s transmission facilities consist of approximately 5,814 pole miles of overhead lines and approximately 74 miles of underground lines, 5,743 miles of which are located in Arizona.
+Added: As of January 3, 2023, APS’s transmission facilities consist of approximately 5,828 pole miles of overhead lines and approximately 85 miles of underground lines, 5,768 miles of which are located in Arizona.
APS’s distribution facilities consist of approximately 11,276 miles of overhead lines and approximately 23,082 miles of underground primary cable (20,021 when excluding abandoned conductor), all of which are located in Arizona.
17 unchanged sentences
Kyrene — Knox System 50.0 %
+Added: Agua Fria Switchyard 10.0 %
Each year APS prepares and files with the ACC a Ten-Year Transmission Plan.
−Removed: In APS’s 2022 plan, APS projects it will develop 81 miles of new transmission lines over the next 10 years.
+Added: In APS’s 2023 Ten-Year Plan, APS projects it will develop 84 miles of new transmission lines over the next 10 years.
+Added: Additionally, APS plans to upgrade 55 miles of existing transmission lines over the same horizon.
The 2023 Ten-Year Plan includes a new 25-mile 500kV line from the Jojoba substation to the Rudd substation.
−Removed: The purpose of this 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.
+Added: 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.
In addition, this new source will provide customers in the area greater access to a diverse mix of resources from around the region.
−Removed: APS continues to work with regulators to identify transmission projects necessary to support renewable energy facilities.
+Added: The 2023 Ten-Year Plan includes numerous projects with the purpose to interconnect new renewable energy resources to the transmission system.
Plant and Transmission Line Leases and Rights-of-Way on Indian Lands
7 unchanged sentences
Other rights expire at various times in the future and renewal action by the applicable tribe or federal agencies will be required at that time.
−Removed: In recent negotiations, certain of the affected Indian tribes have required payments substantially in excess of amounts that we have paid in the past for such rights-of-way.
+Added: In recent negotiations, certain of the affected Indian tribes have required payments substantially
+Added: in excess of amounts that we have paid in the past for such rights-of-way.
The ultimate cost of renewal of certain of the rights-of-way for our transmission lines is therefore uncertain.
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.