XML 66 R54.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Depreciation, Depletion and Amortization



2014	Regulated							Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate Ranges	Depreciable Life Ranges	Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate Ranges	Depreciable Life Ranges
	(in millions)						(in years)	(in millions)					(in years)
Generation	$	18,394	$	7,313		1.7 - 3.5%	31 - 132	$	7,333	$	3,135	2.6 - 3.4%	35 - 66
Transmission	12,395		2,877			1.4 - 2.7%	15 - 87	38		17		2.3%	43 - 55
Distribution	17,157		4,145			2.4 - 3.7%	7 - 75	—		—		NA	NA
CWIP	3,088		(126		)	NM	NM	130		1		NM	NM
Other	4,361		2,254			2.1 - 8.6%	5 - 75	1,409		572		17.1%	25 - 50
Total	$	55,395	$	16,463				$	8,910	$	3,725



2013	Regulated							Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate Ranges	Depreciable Life Ranges	Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate Ranges	Depreciable Life Ranges
	(in millions)						(in years)	(in millions)					(in years)
Generation	$	17,873	$	7,168		1.7 - 3.7%	31 - 132	$	7,201	$	2,969	2.6 - 3.3%	35 - 66
Transmission	10,854		2,805			1.1 - 2.7%	25 - 87	39		16		2.5%	43 - 55
Distribution	16,377		3,988			2.3 - 3.8%	11 - 75	—		—		NA	NA
CWIP	2,326		(121		)	NM	NM	145		1		NM	NM
Other	4,116		1,931			2.0 - 7.9%	5 - 75	1,354		531		NM	NM
Total	$	51,546	$	15,771				$	8,739	$	3,517



2012	Regulated		Nonregulated
Functional Class of Property	Annual Composite Depreciation Rate Ranges	Depreciable Life Ranges	Annual Composite Depreciation Rate Ranges	Depreciable Life Ranges
		(in years)		(in years)
Generation	1.7 - 3.8%	31 - 132	2.6 - 3.3%	35 - 66
Transmission	1.2 - 2.8%	25 - 87	NA	NA
Distribution	2.4 - 3.9%	11 - 75	NA	NA
CWIP	NM	NM	NM	NM
Other	1.8 - 9.6%	5 - 75	NM	NM

NA Not applicable.

NM Not meaningful.

Asset Retirement Obligation (ARO)



	Carrying Amount of ARO
	(in millions)
ARO as of December 31, 2012	$	1,696
Accretion Expense	103
Liabilities Incurred	4
Liabilities Settled	(22		)
Revisions in Cash Flow Estimates	54
ARO as of December 31, 2013	1,835
Accretion Expense	95
Liabilities Incurred	42
Liabilities Settled	(34		)
Revisions in Cash Flow Estimates	81
ARO as of December 31, 2014	$	2,019

Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization



	Years Ended December 31,
	2014		2013		2012
	(in millions)
Allowance for Equity Funds Used During Construction	$	103	$	73	$	93
Allowance for Borrowed Funds Used During Construction	44		40		69

Jointly-owned Electric Facilities



				Company’s Share as of December 31, 2014
	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in millions)
W.C. Beckjord Generating Station, Unit 6 (a)	Coal	12.5	%	$	—	$	—	$	—
Conesville Generating Station, Unit 4 (b)	Coal	43.5	%	336		2		66
J.M. Stuart Generating Station (c)	Coal	26.0	%	553		12		206
Wm. H. Zimmer Generating Station (a)	Coal	25.4	%	812		4		410
Dolet Hills Generating Station, Unit 1 (d)	Lignite	40.2	%	330		4		201
Flint Creek Generating Station, Unit 1 (e)	Coal	50.0	%	125		120		68
Pirkey Generating Station, Unit 1 (e)	Lignite	85.9	%	531		36		381
Oklaunion Generating Station, Unit 1 (f)	Coal	70.3	%	409		10		228
Turk Generating Plant (e)	Coal	73.33	%	1,647		1		70
Transmission	NA	(g)		82		1		49
Total				$	4,825	$	190	$	1,679



				Company’s Share as of December 31, 2013
	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in millions)
W.C. Beckjord Generating Station, Unit 6 (a)	Coal	12.5	%	$	—	$	—	$	—
Conesville Generating Station, Unit 4 (b)	Coal	43.5	%	335		2		55
J.M. Stuart Generating Station (c)	Coal	26.0	%	544		11		190
Wm. H. Zimmer Generating Station (a)	Coal	25.4	%	809		2		399
Dolet Hills Generating Station, Unit 1 (d)	Lignite	40.2	%	262		47		198
Flint Creek Generating Station, Unit 1 (e)	Coal	50.0	%	123		54		66
Pirkey Generating Station, Unit 1 (e)	Lignite	85.9	%	519		29		376
Oklaunion Generating Station, Unit 1 (f)	Coal	70.3	%	404		7		223
Turk Generating Plant (e)	Coal	73.33	%	1,638		13		35
Transmission	NA	(g)		78		—		50
Total				$	4,712	$	165	$	1,592


(a)	Operated by Duke Energy Corporation, a nonaffiliated company. AEP's portion of Beckjord Plant, Unit 6 was impaired in the fourth quarter of 2012. See "Impairments" section of Note 7.


(b)	Operated by AGR.


(c)	Operated by The Dayton Power & Light Company, a nonaffiliated company.


(d)	Operated by CLECO, a nonaffiliated company.


(e)	Operated by SWEPCo.


(f)	Operated by PSO and also jointly-owned (54.7%) by TNC.


(g)	Varying percentages of ownership.


NA	Not applicable

Appalachian Power Co [Member]

Depreciation, Depletion and Amortization



APCo

2014	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Generation	$	6,824,029	$	2,433,231		3.1%	40	-	121	$	—	$	—	NA	NA
Transmission	2,228,029		507,542			1.7%	15	-	87	—		—		NA	NA
Distribution	3,258,306		722,665			3.5%	13	-	57	—		—		NA	NA
CWIP	321,495		(19,405		)	NM	NM			—		—		NA	NA
Other	339,175		167,171			6.9%	24	-	55	34,345		12,460		NM	NM
Total	$	12,971,034	$	3,811,204						$	34,345	$	12,460



2013	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Generation	$	6,745,172	$	2,306,545		3.0%	40	-	121	$	—	$	—	NA	NA
Transmission	2,160,660		490,143			1.6%	25	-	87	—		—		NA	NA
Distribution	3,139,150		674,351			3.5%	11	-	52	—		—		NA	NA
CWIP	184,701		(19,297		)	NM	NM			—		—		NA	NA
Other	323,758		153,797			7.3%	24	-	55	33,759		12,451		NM	NM
Total	$	12,553,441	$	3,605,539						$	33,759	$	12,451



2012	Regulated				Nonregulated
Functional Class of Property	Annual Composite Depreciation Rate	Depreciable Life Ranges			Annual Composite Depreciation Rate	Depreciable Life Ranges
		(in years)				(in years)
Generation	3.0%	40	-	121	NA	NA
Transmission	1.6%	25	-	87	NA	NA
Distribution	3.4%	13	-	57	NA	NA
CWIP	NM	NM			NA	NA
Other	6.8%	24	-	55	NM	NM


NA	Not applicable.


NM	Not meaningful.

Asset Retirement Obligation (ARO)



Company	ARO as of December 31, 2013		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates		Contribution/ (Distribution) of OPCo Generation Assets		ARO as of December 31, 2014
(in thousands)
APCo (a)(d)	$	152,607	$	9,081	$	—	$	(23,992	)	$	10,681	$	—	$	148,377
I&M (a)(b)(d)	1,255,184		60,005		—		(1,380		)	28,740		—		1,342,549
OPCo (a)(d)	1,297		80		—		(26		)	10		—		1,361
PSO (a)(d)	22,928		1,786		—		(749		)	14,055		—		38,020
SWEPCo (a)(c)(d)	87,630		5,156		—		(1,102		)	2,710		—		94,394



Company	ARO as of December 31, 2012		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates			Contribution/ (Distribution) of OPCo Generation Assets			ARO as of December 31, 2013
(in thousands)
APCo (a)(d)	$	115,168	$	7,343	$	—	$	(7,298	)	$	7,083		$	30,311		$	152,607
I&M (a)(b)(d)	1,192,313		72,658		—		(635		)	(9,152		)	—			1,255,184
OPCo (a)(d)	269,940		14,957		158		(9,788		)	53,208			(327,178		)	1,297
PSO (a)(d)	21,999		1,703		—		(755		)	(19		)	—			22,928
SWEPCo (a)(c)(d)	78,017		4,912		4,191		(2,699		)	3,209			—			87,630


(a)	Includes ARO related to ash disposal facilities.


(b)	Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.3 billion and $1.2 billion as of December 31, 2014 and 2013.


(c)	Includes ARO related to Sabine and DHLC.


(d)	Includes ARO related to asbestos removal.

Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	3,810	$	1,522	$	1,347
I&M	8,015		9,752		4,717
OPCo	4,436		10,102		9,046
PSO	1,792		2,272		1,098
SWEPCo	6,949		4,262		48,499



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	7,053	$	2,353	$	1,684
I&M	18,873		19,943		9,724
OPCo	6,913		4,961		3,492
PSO	3,071		4,187		2,007
SWEPCo	11,947		7,338		57,054

Jointly-owned Electric Facilities



				Company’s Share as of December 31, 2014
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50.0	%	$	801,536	$	119,921	$	492,184

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	94,678	$	2,558	$	57,490

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	329,706	$	3,739	$	201,321
Flint Creek Generating Station, Unit 1 (d)	Coal	50.0	%	125,114		119,629		67,948
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	531,064		36,490		381,058
Turk Generating Plant (d)	Coal	73.33	%	1,647,005		889		69,820
Total				$	2,632,889	$	160,747	$	720,147



				Company’s Share as of December 31, 2013
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50	%	$	797,485	$	54,577	$	471,787

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	93,555	$	1,844	$	57,576

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	261,685	$	47,131	$	197,720
Flint Creek Generating Station, Unit 1 (d)	Coal	50	%	122,566		54,281		65,546
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	519,158		28,833		375,718
Turk Generating Plant (d)	Coal	73.33	%	1,638,044		13,081		35,455
Total				2,541,453		143,326		674,439


(a)	Operated by I&M.


(b)	Operated by PSO and also jointly-owned (54.7%) by TNC.


(c)	Operated by CLECO, a nonaffiliated company.


(d)	Operated by SWEPCo.

Indiana Michigan Power Co [Member]

Depreciation, Depletion and Amortization



I&M

2014	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Generation	$	3,741,831	$	1,855,162		2.0%	59	-	132	$	—	$	—	NA	NA
Transmission	1,358,419		432,927			1.7%	50	-	75	—		—		NA	NA
Distribution	1,698,409		413,040			2.8%	15	-	70	—		—		NA	NA
CWIP	537,237		(27,858		)	NM	NM			—		—		NA	NA
Other	1,342,813		628,991			6.1%	14	-	45	148,007		108,079		NM	NM
Total	$	8,678,709	$	3,302,262						$	148,007	$	108,079



2013	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Generation	$	3,577,906	$	1,887,333		1.9%	59	-	132	$	—	$	—	NA	NA
Transmission	1,304,225		420,295			1.5%	50	-	75	—		—		NA	NA
Distribution	1,625,057		390,014			2.8%	15	-	70	—		—		NA	NA
CWIP	427,164		(18,824		)	NM	NM			—		—		NA	NA
Other	1,268,597		509,426			4.9%	14	-	45	152,764		111,105		NM	NM
Total	$	8,202,949	$	3,188,244						$	152,764	$	111,105



2012	Regulated				Nonregulated
Functional Class of Property	Annual Composite Depreciation Rate	Depreciable Life Ranges			Annual Composite Depreciation Rate	Depreciable Life Ranges
		(in years)				(in years)
Generation	1.7%	59	-	132	NA	NA
Transmission	1.5%	46	-	75	NA	NA
Distribution	2.5%	14	-	70	NA	NA
CWIP	NM	NM			NA	NA
Other	9.6%	14	-	40	NM	NM


NA	Not applicable.


NM	Not meaningful.

Asset Retirement Obligation (ARO)



Company	ARO as of December 31, 2013		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates		Contribution/ (Distribution) of OPCo Generation Assets		ARO as of December 31, 2014
(in thousands)
APCo (a)(d)	$	152,607	$	9,081	$	—	$	(23,992	)	$	10,681	$	—	$	148,377
I&M (a)(b)(d)	1,255,184		60,005		—		(1,380		)	28,740		—		1,342,549
OPCo (a)(d)	1,297		80		—		(26		)	10		—		1,361
PSO (a)(d)	22,928		1,786		—		(749		)	14,055		—		38,020
SWEPCo (a)(c)(d)	87,630		5,156		—		(1,102		)	2,710		—		94,394



Company	ARO as of December 31, 2012		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates			Contribution/ (Distribution) of OPCo Generation Assets			ARO as of December 31, 2013
(in thousands)
APCo (a)(d)	$	115,168	$	7,343	$	—	$	(7,298	)	$	7,083		$	30,311		$	152,607
I&M (a)(b)(d)	1,192,313		72,658		—		(635		)	(9,152		)	—			1,255,184
OPCo (a)(d)	269,940		14,957		158		(9,788		)	53,208			(327,178		)	1,297
PSO (a)(d)	21,999		1,703		—		(755		)	(19		)	—			22,928
SWEPCo (a)(c)(d)	78,017		4,912		4,191		(2,699		)	3,209			—			87,630


(a)	Includes ARO related to ash disposal facilities.


(b)	Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.3 billion and $1.2 billion as of December 31, 2014 and 2013.


(c)	Includes ARO related to Sabine and DHLC.


(d)	Includes ARO related to asbestos removal.

Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	3,810	$	1,522	$	1,347
I&M	8,015		9,752		4,717
OPCo	4,436		10,102		9,046
PSO	1,792		2,272		1,098
SWEPCo	6,949		4,262		48,499



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	7,053	$	2,353	$	1,684
I&M	18,873		19,943		9,724
OPCo	6,913		4,961		3,492
PSO	3,071		4,187		2,007
SWEPCo	11,947		7,338		57,054

Jointly-owned Electric Facilities



				Company’s Share as of December 31, 2014
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50.0	%	$	801,536	$	119,921	$	492,184

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	94,678	$	2,558	$	57,490

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	329,706	$	3,739	$	201,321
Flint Creek Generating Station, Unit 1 (d)	Coal	50.0	%	125,114		119,629		67,948
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	531,064		36,490		381,058
Turk Generating Plant (d)	Coal	73.33	%	1,647,005		889		69,820
Total				$	2,632,889	$	160,747	$	720,147



				Company’s Share as of December 31, 2013
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50	%	$	797,485	$	54,577	$	471,787

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	93,555	$	1,844	$	57,576

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	261,685	$	47,131	$	197,720
Flint Creek Generating Station, Unit 1 (d)	Coal	50	%	122,566		54,281		65,546
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	519,158		28,833		375,718
Turk Generating Plant (d)	Coal	73.33	%	1,638,044		13,081		35,455
Total				2,541,453		143,326		674,439


(a)	Operated by I&M.


(b)	Operated by PSO and also jointly-owned (54.7%) by TNC.


(c)	Operated by CLECO, a nonaffiliated company.


(d)	Operated by SWEPCo.

Ohio Power Co [Member]

Depreciation, Depletion and Amortization

2012

Regulated

Nonregulated

Functional Class of Property

Annual Composite
Depreciation Rate

Depreciable
Life Ranges

Annual Composite
Depreciation Rate

Depreciable
Life Ranges

(in years)

Generation

3.0%

Transmission

2.3%

Distribution

2.7%

CWIP

Other

7.3%


NA	Not applicable.


NM	Not meaningful.



OPCo

2014	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Transmission	$	2,104,613	$	844,353		2.3%	39	-	60	$	—	$	—	NA	NA
Distribution	4,087,601		1,050,888			2.7%	7	-	57	—		—		NA	NA
CWIP	218,667		(39,218		)	NM	NM			—		—		NA	NA
Other	380,453		181,258			7.0%	7	-	50	10,395		839		NM	NM
Total	$	6,791,334	$	2,037,281						$	10,395	$	839



2013	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Transmission	$	2,011,289	$	814,849		2.3%	39	-	60	$	—	$	—	NA	NA
Distribution	3,877,532		1,023,313			2.7%	12	-	60	—		—		NA	NA
CWIP	185,428		(29,825		)	NM	NM			—		—		NA	NA
Other	354,195		163,894			7.5%	25	-	50	10,378		811		NM	NM
Total	$	6,428,444	$	1,972,231						$	10,378	$	811

Asset Retirement Obligation (ARO)



Company	ARO as of December 31, 2013		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates		Contribution/ (Distribution) of OPCo Generation Assets		ARO as of December 31, 2014
(in thousands)
APCo (a)(d)	$	152,607	$	9,081	$	—	$	(23,992	)	$	10,681	$	—	$	148,377
I&M (a)(b)(d)	1,255,184		60,005		—		(1,380		)	28,740		—		1,342,549
OPCo (a)(d)	1,297		80		—		(26		)	10		—		1,361
PSO (a)(d)	22,928		1,786		—		(749		)	14,055		—		38,020
SWEPCo (a)(c)(d)	87,630		5,156		—		(1,102		)	2,710		—		94,394



Company	ARO as of December 31, 2012		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates			Contribution/ (Distribution) of OPCo Generation Assets			ARO as of December 31, 2013
(in thousands)
APCo (a)(d)	$	115,168	$	7,343	$	—	$	(7,298	)	$	7,083		$	30,311		$	152,607
I&M (a)(b)(d)	1,192,313		72,658		—		(635		)	(9,152		)	—			1,255,184
OPCo (a)(d)	269,940		14,957		158		(9,788		)	53,208			(327,178		)	1,297
PSO (a)(d)	21,999		1,703		—		(755		)	(19		)	—			22,928
SWEPCo (a)(c)(d)	78,017		4,912		4,191		(2,699		)	3,209			—			87,630


(a)	Includes ARO related to ash disposal facilities.


(b)	Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.3 billion and $1.2 billion as of December 31, 2014 and 2013.


(c)	Includes ARO related to Sabine and DHLC.


(d)	Includes ARO related to asbestos removal.

Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	7,053	$	2,353	$	1,684
I&M	18,873		19,943		9,724
OPCo	6,913		4,961		3,492
PSO	3,071		4,187		2,007
SWEPCo	11,947		7,338		57,054



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	3,810	$	1,522	$	1,347
I&M	8,015		9,752		4,717
OPCo	4,436		10,102		9,046
PSO	1,792		2,272		1,098
SWEPCo	6,949		4,262		48,499

Jointly-owned Electric Facilities



				Company’s Share as of December 31, 2014
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50.0	%	$	801,536	$	119,921	$	492,184

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	94,678	$	2,558	$	57,490

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	329,706	$	3,739	$	201,321
Flint Creek Generating Station, Unit 1 (d)	Coal	50.0	%	125,114		119,629		67,948
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	531,064		36,490		381,058
Turk Generating Plant (d)	Coal	73.33	%	1,647,005		889		69,820
Total				$	2,632,889	$	160,747	$	720,147



				Company’s Share as of December 31, 2013
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50	%	$	797,485	$	54,577	$	471,787

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	93,555	$	1,844	$	57,576

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	261,685	$	47,131	$	197,720
Flint Creek Generating Station, Unit 1 (d)	Coal	50	%	122,566		54,281		65,546
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	519,158		28,833		375,718
Turk Generating Plant (d)	Coal	73.33	%	1,638,044		13,081		35,455
Total				2,541,453		143,326		674,439


(a)	Operated by I&M.


(b)	Operated by PSO and also jointly-owned (54.7%) by TNC.


(c)	Operated by CLECO, a nonaffiliated company.


(d)	Operated by SWEPCo.

Public Service Co Of Oklahoma [Member]

Depreciation, Depletion and Amortization



2012	Regulated				Nonregulated
Functional Class of Property	Annual Composite Depreciation Rate	Depreciable Life Ranges			Annual Composite Depreciation Rate	Depreciable Life Ranges
		(in years)				(in years)
Generation	1.7%	35	-	70	NA	NA
Transmission	1.9%	40	-	75	NA	NA
Distribution	2.4%	30	-	65	NA	NA
CWIP	NM	NM			NA	NA
Other	6.6%	5	-	40	NM	NM


NA	Not applicable.


NM	Not meaningful.



PSO

2014	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)						(in years)
Generation	$	1,264,724	$	585,653		1.7%	35	-	70	$	—	$	—		NA	NA
Transmission	788,911		161,056			1.9%	40	-	75	—		—			NA	NA
Distribution	2,080,221		366,325			2.4%	30	-	65	—		—			NA	NA
CWIP	204,753		(11,055		)	NM	NM			—		—			NA	NA
Other	416,398		217,583			4.1%	5	-	40	5,170		(8		)	NM	NM
Total	$	4,755,007	$	1,319,562						$	5,170	$	(8	)



2013	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)						(in years)
Generation	$	1,203,221	$	583,486		1.7%	35	-	70	$	—	$	—		NA	NA
Transmission	731,312		186,040			1.9%	40	-	75	—		—			NA	NA
Distribution	1,986,032		365,299			2.3%	30	-	65	—		—			NA	NA
CWIP	175,890		(15,138		)	NM	NM			—		—			NA	NA
Other	387,856		203,841			4.1%	5	-	40	5,170		(6		)	NM	NM
Total	$	4,484,311	$	1,323,528						$	5,170	$	(6	)

Asset Retirement Obligation (ARO)



Company	ARO as of December 31, 2013		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates		Contribution/ (Distribution) of OPCo Generation Assets		ARO as of December 31, 2014
(in thousands)
APCo (a)(d)	$	152,607	$	9,081	$	—	$	(23,992	)	$	10,681	$	—	$	148,377
I&M (a)(b)(d)	1,255,184		60,005		—		(1,380		)	28,740		—		1,342,549
OPCo (a)(d)	1,297		80		—		(26		)	10		—		1,361
PSO (a)(d)	22,928		1,786		—		(749		)	14,055		—		38,020
SWEPCo (a)(c)(d)	87,630		5,156		—		(1,102		)	2,710		—		94,394



Company	ARO as of December 31, 2012		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates			Contribution/ (Distribution) of OPCo Generation Assets			ARO as of December 31, 2013
(in thousands)
APCo (a)(d)	$	115,168	$	7,343	$	—	$	(7,298	)	$	7,083		$	30,311		$	152,607
I&M (a)(b)(d)	1,192,313		72,658		—		(635		)	(9,152		)	—			1,255,184
OPCo (a)(d)	269,940		14,957		158		(9,788		)	53,208			(327,178		)	1,297
PSO (a)(d)	21,999		1,703		—		(755		)	(19		)	—			22,928
SWEPCo (a)(c)(d)	78,017		4,912		4,191		(2,699		)	3,209			—			87,630


(a)	Includes ARO related to ash disposal facilities.


(b)	Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.3 billion and $1.2 billion as of December 31, 2014 and 2013.


(c)	Includes ARO related to Sabine and DHLC.


(d)	Includes ARO related to asbestos removal.

Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	7,053	$	2,353	$	1,684
I&M	18,873		19,943		9,724
OPCo	6,913		4,961		3,492
PSO	3,071		4,187		2,007
SWEPCo	11,947		7,338		57,054



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	3,810	$	1,522	$	1,347
I&M	8,015		9,752		4,717
OPCo	4,436		10,102		9,046
PSO	1,792		2,272		1,098
SWEPCo	6,949		4,262		48,499

Jointly-owned Electric Facilities



				Company’s Share as of December 31, 2014
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50.0	%	$	801,536	$	119,921	$	492,184

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	94,678	$	2,558	$	57,490

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	329,706	$	3,739	$	201,321
Flint Creek Generating Station, Unit 1 (d)	Coal	50.0	%	125,114		119,629		67,948
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	531,064		36,490		381,058
Turk Generating Plant (d)	Coal	73.33	%	1,647,005		889		69,820
Total				$	2,632,889	$	160,747	$	720,147



				Company’s Share as of December 31, 2013
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50	%	$	797,485	$	54,577	$	471,787

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	93,555	$	1,844	$	57,576

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	261,685	$	47,131	$	197,720
Flint Creek Generating Station, Unit 1 (d)	Coal	50	%	122,566		54,281		65,546
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	519,158		28,833		375,718
Turk Generating Plant (d)	Coal	73.33	%	1,638,044		13,081		35,455
Total				2,541,453		143,326		674,439


(a)	Operated by I&M.


(b)	Operated by PSO and also jointly-owned (54.7%) by TNC.


(c)	Operated by CLECO, a nonaffiliated company.


(d)	Operated by SWEPCo.

Southwestern Electric Power Co [Member]

Depreciation, Depletion and Amortization



2012	Regulated				Nonregulated
Functional Class of Property	Annual Composite Depreciation Rate	Depreciable Life Ranges			Annual Composite Depreciation Rate	Depreciable Life Ranges
		(in years)				(in years)
Generation (a)	2.2%	35	-	65	NA	NA
Transmission	2.3%	50	-	70	NA	NA
Distribution	2.6%	25	-	65	NA	NA
CWIP (a)	NM	NM			NA	NA
Other	6.6%	7	-	47	NM	NM


(a)	SWEPCo's regulated section includes amounts related to SWEPCo's Arkansas jurisdictional share of the Turk Plant.


NA	Not applicable.


NM	Not meaningful.



2013	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Generation (a)	$	3,764,429	$	1,062,166		2.2%	40	-	70	$	—	$	—	NA	NA
Transmission	1,165,167		312,567			2.3%	50	-	70	—		—		NA	NA
Distribution	1,843,912		563,087			2.6%	25	-	65	—		—		NA	NA
CWIP (a)	281,849		(7,355		)	NM	NM			—		—		NA	NA
Other	574,131		326,871			5.0%	7	-	51	295,099		134,316		NM	NM
Total	$	7,629,488	$	2,257,336						$	295,099	$	134,316



SWEPCo

2014	Regulated									Nonregulated
Functional Class of Property	Property, Plant and Equipment		Accumulated Depreciation			Annual Composite Depreciation Rate	Depreciable Life Ranges			Property, Plant and Equipment		Accumulated Depreciation		Annual Composite Depreciation Rate	Depreciable Life Ranges
	(in thousands)						(in years)			(in thousands)					(in years)
Generation (a)	$	3,864,543	$	1,101,244		2.2%	40	-	70	$	—	$	—	NA	NA
Transmission	1,300,729		328,783			2.2%	50	-	70	—		—		NA	NA
Distribution	1,894,572		576,808			2.7%	25	-	65	—		—		NA	NA
CWIP (a)	471,689		(8,454		)	NM	NM			291		—		NA	NA
Other	587,027		361,892			4.8%	7	-	51	291,726		143,017		NM	NM
Total	$	8,118,560	$	2,360,273						$	292,017	$	143,017

Asset Retirement Obligation (ARO)



Company	ARO as of December 31, 2013		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates		Contribution/ (Distribution) of OPCo Generation Assets		ARO as of December 31, 2014
(in thousands)
APCo (a)(d)	$	152,607	$	9,081	$	—	$	(23,992	)	$	10,681	$	—	$	148,377
I&M (a)(b)(d)	1,255,184		60,005		—		(1,380		)	28,740		—		1,342,549
OPCo (a)(d)	1,297		80		—		(26		)	10		—		1,361
PSO (a)(d)	22,928		1,786		—		(749		)	14,055		—		38,020
SWEPCo (a)(c)(d)	87,630		5,156		—		(1,102		)	2,710		—		94,394



Company	ARO as of December 31, 2012		Accretion Expense		Liabilities Incurred		Liabilities Settled			Revisions in Cash Flow Estimates			Contribution/ (Distribution) of OPCo Generation Assets			ARO as of December 31, 2013
(in thousands)
APCo (a)(d)	$	115,168	$	7,343	$	—	$	(7,298	)	$	7,083		$	30,311		$	152,607
I&M (a)(b)(d)	1,192,313		72,658		—		(635		)	(9,152		)	—			1,255,184
OPCo (a)(d)	269,940		14,957		158		(9,788		)	53,208			(327,178		)	1,297
PSO (a)(d)	21,999		1,703		—		(755		)	(19		)	—			22,928
SWEPCo (a)(c)(d)	78,017		4,912		4,191		(2,699		)	3,209			—			87,630


(a)	Includes ARO related to ash disposal facilities.


(b)	Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.3 billion and $1.2 billion as of December 31, 2014 and 2013.


(c)	Includes ARO related to Sabine and DHLC.


(d)	Includes ARO related to asbestos removal.

Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	3,810	$	1,522	$	1,347
I&M	8,015		9,752		4,717
OPCo	4,436		10,102		9,046
PSO	1,792		2,272		1,098
SWEPCo	6,949		4,262		48,499



	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	7,053	$	2,353	$	1,684
I&M	18,873		19,943		9,724
OPCo	6,913		4,961		3,492
PSO	3,071		4,187		2,007
SWEPCo	11,947		7,338		57,054

Jointly-owned Electric Facilities



				Company’s Share as of December 31, 2014
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50.0	%	$	801,536	$	119,921	$	492,184

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	94,678	$	2,558	$	57,490

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	329,706	$	3,739	$	201,321
Flint Creek Generating Station, Unit 1 (d)	Coal	50.0	%	125,114		119,629		67,948
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	531,064		36,490		381,058
Turk Generating Plant (d)	Coal	73.33	%	1,647,005		889		69,820
Total				$	2,632,889	$	160,747	$	720,147



				Company’s Share as of December 31, 2013
Company	Fuel Type	Percent of Ownership		Utility Plant in Service		Construction Work in Progress		Accumulated Depreciation
				(in thousands)
I&M
Rockport Generating Plant (a)(e)	Coal	50	%	$	797,485	$	54,577	$	471,787

PSO
Oklaunion Generating Station, Unit 1 (b)	Coal	15.6	%	$	93,555	$	1,844	$	57,576

SWEPCo
Dolet Hills Generating Station, Unit 1 (c)	Lignite	40.2	%	$	261,685	$	47,131	$	197,720
Flint Creek Generating Station, Unit 1 (d)	Coal	50	%	122,566		54,281		65,546
Pirkey Generating Station, Unit 1 (d)	Lignite	85.9	%	519,158		28,833		375,718
Turk Generating Plant (d)	Coal	73.33	%	1,638,044		13,081		35,455
Total				2,541,453		143,326		674,439


(a)	Operated by I&M.


(b)	Operated by PSO and also jointly-owned (54.7%) by TNC.


(c)	Operated by CLECO, a nonaffiliated company.


(d)	Operated by SWEPCo.

- Definition

Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants.

+ References+ Details