Jointly-Owned Facilities

12 Months Ended

Dec. 31, 2022

Jointly Owned Utility Plant, Net Ownership Amount [Abstract]

Jointly-Owned Facilities

Jointly-Owned Facilities

APS shares ownership of some of its generating and transmission facilities with other companies.  We are responsible for our share of operating costs which are included in the corresponding operating expenses on our Consolidated Statements of Income. We are also responsible for providing our own financing.  Our share of operating expenses and utility plant costs related to these facilities is accounted for using proportional consolidation.  The following table shows APS’s interests in those jointly-owned facilities recorded on the Consolidated Balance Sheets at December 31, 2022 (dollars in thousands):

	Percent Owned			Plant in Service		Accumulated Depreciation		Construction Work in Progress
Generating facilities:
Palo Verde Units 1 and 3	29.1	%		$	1,947,593	$	1,099,132	$	39,933
Palo Verde Unit 2 (a)	16.8	%		659,514		383,775		14,784
Palo Verde Common	28.0	%	(b)	799,794		346,705		52,631
Palo Verde Sale Leaseback			(a)	351,050		260,754		—
Four Corners Generating Station	63.0	%		1,665,042		620,918		46,643
Cholla Common Facilities (c)	50.5	%		207,104		140,886		2,988
Transmission facilities:
ANPP 500kV System	33.4	%	(b)	133,887		55,704		2,820
Navajo Southern System	26.8	%	(b)	90,345		36,929		1,945
Palo Verde — Yuma 500kV System	25.4	%	(b)	24,026		7,559		128
Four Corners Switchyards	61.9	%	(b)	73,243		20,350		120
Phoenix — Mead System	17.1	%	(b)	39,705		20,055		51
Palo Verde — Rudd 500kV System	50.0	%		95,736		31,118		391
Morgan — Pinnacle Peak System	64.7	%	(b)	119,785		25,791		96
Round Valley System	50.0	%		548		193		—
Palo Verde — Morgan System	87.8	%	(b)	263,576		34,415		1,414
Hassayampa — North Gila System	80.0	%		148,174		22,566		3,771
Cholla 500kV Switchyard	85.7	%		8,100		2,380		—
Saguaro 500kV Switchyard	60.0	%		21,656		13,809		—
Kyrene — Knox System	50.0	%		578		336		—
Agua Fria Switchyard	10.0	%		—		—		32

(a)See Note 17.

(b)Weighted-average of interests.

(c)PacifiCorp owns Cholla Unit 4 (see Note 3 for additional information), and APS operated the unit for PacifiCorp.  Cholla Unit 4 was retired on December 24, 2020. The common facilities at Cholla are jointly-owned.