Jointly-Owned Facilities

12 Months Ended

Dec. 31, 2021

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, 2021 (dollars in thousands):

	Percent Owned			Plant in Service		Accumulated Depreciation		Construction Work in Progress
Generating facilities:
Palo Verde Units 1 and 3	29.1	%		$	1,932,629	$	1,113,905	$	28,288
Palo Verde Unit 2 (a)	16.8	%		657,102		384,193		14,084
Palo Verde Common	28.0	%	(b)	792,849		334,804		43,690
Palo Verde Sale Leaseback			(a)	351,050		256,884		—
Four Corners Generating Station	63.0	%		1,686,702		608,247		21,515
Cholla Common Facilities (c)	50.5	%		208,709		121,877		1,608
Transmission facilities:
ANPP 500kV System	33.5	%	(b)	133,289		53,708		115
Navajo Southern System	26.8	%	(b)	89,895		35,144		1,535
Palo Verde — Yuma 500kV System	25.8	%	(b)	23,650		7,188		716
Four Corners Switchyards	60.1	%	(b)	73,133		18,637		258
Phoenix — Mead System	17.1	%	(b)	39,523		20,150		—
Palo Verde — Rudd 500kV System	50.0	%		96,376		29,426		—
Morgan — Pinnacle Peak System	64.7	%	(b)	119,814		23,575		138
Round Valley System	50.0	%		535		180		—
Palo Verde — Morgan System	87.8	%	(b)	259,180		27,995		268
Hassayampa — North Gila System	80.0	%		148,039		19,317		—
Cholla 500kV Switchyard	85.7	%		8,287		2,163		5
Saguaro 500kV Switchyard	60.0	%		21,655		13,471		—
Kyrene — Knox System	50.0	%		578		328		—

(a)See Note 18.

(b)Weighted-average of interests.

(c)PacifiCorp owns Cholla Unit 4 (see Note 4 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.