Jointly-Owned Facilities (Tables)

12 Months Ended

Dec. 31, 2023

Jointly Owned Utility Plant, Net Ownership Amount [Abstract]

Schedule Of APS's Interests In Jointly-owned Facilities Recorded On The Consolidated Balance Sheets

The following table shows APS’s interests in those jointly-owned facilities recorded on the Consolidated Balance Sheets at December 31, 2023 (dollars in thousands):

	Percent Owned			Plant in Service		Accumulated Depreciation		Construction Work in Progress
Generating facilities:
Palo Verde Units 1 and 3	29.1	%		$	1,990,237	$	1,087,614	$	21,442
Palo Verde Unit 2 (a)	16.8	%		681,483		387,485		12,700
Palo Verde Common	28.0	%	(b)	857,807		356,962		65,911
Palo Verde Sale Leaseback			(a)	351,050		264,624		—
Four Corners Generating Station	63.0	%		1,748,436		659,780		29,586
Cholla Common Facilities (c)	50.5	%		250,994		167,357		7,487
Transmission facilities:
ANPP 500kV System	33.4	%	(b)	136,145		58,252		4,801
Navajo Southern System	25.2	%	(b)	87,185		36,743		550
Palo Verde — Yuma 500kV System	25.3	%	(b)	24,057		7,912		432
Four Corners Switchyards	57.5	%	(b)	84,279		21,918		161
Phoenix — Mead System	17.1	%	(b)	39,772		20,679		257
Palo Verde — Rudd 500kV System	50.0	%		95,736		32,665		731
Morgan — Pinnacle Peak System	63.2	%	(b)	117,080		26,990		229
Round Valley System	50.0	%		548		205		—
Palo Verde — Morgan System	87.5	%	(b)	268,629		40,962		8,053
Hassayampa — North Gila System	80.0	%		151,684		24,618		—
Cholla 500kV Switchyard	85.7	%		8,445		2,760		—
Saguaro 500kV Switchyard	60.0	%		21,627		14,060		17
Kyrene — Knox System	50.0	%		578		340		—
Agua Fria Switchyard	10.0	%		—		—		77

(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.