Jointly-Owned Facilities (Tables)

12 Months Ended

Dec. 31, 2019

Jointly Owned Utility Plant, Net Ownership Amount [Abstract]

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, 2019 (dollars in thousands):

	Percent Owned			Plant in Service		Accumulated Depreciation		Construction Work in Progress
Generating facilities:
Palo Verde Units 1 and 3	29.1	%		$	1,877,748	$	1,102,609	$	22,071
Palo Verde Unit 2 (a)	16.8	%		634,545		377,722		11,831
Palo Verde Common	28.0	%	(b)	746,653		290,084		46,570
Palo Verde Sale Leaseback			(a)	351,050		249,144		—
Four Corners Generating Station	63.0	%		1,520,171		559,272		44,842
Cholla common facilities (c)	50.5	%		184,608		95,720		1,323
Transmission facilities:
ANPP 500kV System	33.5	%	(b)	133,396		51,248		2,723
Navajo Southern System	26.7	%	(b)	89,672		31,985		194
Palo Verde — Yuma 500kV System	19.0	%	(b)	15,274		6,486		4,886
Four Corners Switchyards	63.0	%	(b)	69,994		16,674		2,395
Phoenix — Mead System	17.1	%	(b)	39,355		18,570		53
Palo Verde — Rudd 500kV System	50.0	%		93,112		26,719		317
Morgan — Pinnacle Peak System	64.6	%	(b)	117,752		18,822		—
Round Valley System	50.0	%		515		164		—
Palo Verde — Morgan System	88.9	%	(b)	238,689		13,146		—
Hassayampa — North Gila System	80.0	%		143,422		12,676		—
Cholla 500kV Switchyard	85.7	%		7,651		1,597		535
Saguaro 500kV Switchyard	60.0	%		20,425		12,949		—
Kyrene — Knox System	50.0	%		578		315		—

(a) See Note 19.

(b) Weighted-average of interests.

(c)

PacifiCorp owns Cholla Unit 4 (see Note 4 for additional information) and APS operates the unit for PacifiCorp.  The common facilities at Cholla are jointly-owned.