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 statement 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, 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.