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, as well as 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, 2014 (dollars in thousands):



	Percent Owned			Plant in Service		Accumulated Depreciation		Construction Work in Progress
Generating facilities:
Palo Verde Units 1 and 3	29.1	%		$	1,734,918	$	1,051,670	$	16,955
Palo Verde Unit 2 (a)	16.8	%		556,472		349,960		13,710
Palo Verde Common	28.0	%	(b)	612,190		224,208		68,896
Palo Verde Sale Leaseback			(a)	351,050		229,795		—
Four Corners Generating Station	63.0	%		811,648		578,772		33,150
Navajo Generating Station Units 1, 2 and 3	14.0	%		272,208		159,198		2,716
Cholla common facilities (c)	63.3	%	(b)	155,856		49,954		866
Transmission facilities:
ANPP 500kV System	33.6	%	(b)	106,369		35,035		3,731
Navajo Southern System	22.5	%	(b)	59,994		18,119		1,113
Palo Verde — Yuma 500kV System	18.2	%	(b)	12,925		4,943		12
Four Corners Switchyards	47.5	%	(b)	33,034		10,035		386
Phoenix — Mead System	17.1	%	(b)	39,777		12,843		105
Palo Verde — Estrella 500kV System	50.0	%	(b)	89,572		16,491		736
Morgan — Pinnacle Peak System	64.4	%	(b)	130,840		8,970		1,690
Round Valley System	50.0	%	(b)	497		276		1
Palo Verde — Morgan System	90.0	%	(b)	—		—		69,377
Hassayampa - North Gila System	80.0	%	(b)	8,902		3,634		142,645


(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.