Jointly-Owned Facilities (Tables)

12 Months Ended

Dec. 31, 2015

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, 2015 (dollars in thousands):

	Percent Owned			Plant in Service		Accumulated Depreciation		Construction Work in Progress
Generating facilities:
Palo Verde Units 1 and 3	29.1	%		$	1,744,137	$	1,067,376	$	22,228
Palo Verde Unit 2 (a)	16.8	%		583,633		356,767		4,142
Palo Verde Common	28.0	%	(b)	643,201		231,609		64,069
Palo Verde Sale Leaseback			(a)	351,050		233,665		—
Four Corners Generating Station	63.0	%		857,555		577,321		77,317
Navajo Generating Station Units 1, 2 and 3	14.0	%		274,640		168,132		4,460
Cholla common facilities (c)	63.3	%	(b)	158,623		53,777		1,390
Transmission facilities:
ANPP 500kV System	33.4	%	(b)	109,348		36,576		1,594
Navajo Southern System	22.7	%	(b)	62,139		19,361		397
Palo Verde — Yuma 500kV System	19.3	%	(b)	14,043		5,226		133
Four Corners Switchyards	49.8	%	(b)	38,420		9,833		1,687
Phoenix — Mead System	17.1	%	(b)	39,089		13,173		151
Palo Verde — Estrella 500kV System	50.0	%	(b)	89,832		18,359		1,008
Morgan — Pinnacle Peak System	64.6	%	(b)	129,855		11,087		2,592
Round Valley System	50.0	%	(b)	703		286		—
Palo Verde — Morgan System	87.7	%	(b)	12		—		133,813
Hassayampa - North Gila System	80.0	%	(b)	164,854		1,159		—
Cholla 500 Switchyard	85.7	%	(b)	547		15		—
Saguaro 500 Switchyard	75.0	%	(b)	773		26		—

(a) See Note 18.

(b) Weighted-average of interests.

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