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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2014
Appalachian Power Co [Member]  
Affiliated Revenues
Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement (a)
 
$
184

 
$
503

 
$
1,121

 
$
—

 
$
—

Direct Sales to East Affiliates
 
141,721

 
—

 
—

 
3,765

 
10,048

Direct Sales to West Affiliates
 
614

 
363

 
—

 
—

 
328

Direct Sales to AEPEP
 
—

 
—

 
44,121

 
—

 
—

Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,665
)
 
1,675

 
104,052

 
8

 
14,119

Other Revenues
 
3,583

 
1,657

 
15,922

 
3,281

 
1,783

Total Affiliated Revenues
 
$
144,437

 
$
4,198

 
$
165,216

 
$
7,054

 
$
26,278

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
193,651

 
$
218,164

 
$
924,313

 
$
—

 
$
—

Direct Sales to East Affiliates
 
129,014

 
—

 
152,689

 
14

 
1

Direct Sales to West Affiliates
 
578

 
391

 
804

 
10,761

 
35,410

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(136
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
461

 
(681
)
 
53,405

 
—

 
14,715

Other Revenues
 
23,780

 
1,525

 
35,643

 
3,471

 
1,822

Total Affiliated Revenues
 
$
347,484

 
$
219,399

 
$
1,166,854

 
$
14,246

 
$
51,812

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
166,733

 
$
265,923

 
$
643,486

 
$
—

 
$
—

Direct Sales to East Affiliates
 
124,519

 
—

 
136,142

 
34

 
142

Direct Sales to West Affiliates
 
314

 
218

 
454

 
18,861

 
23,695

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(583
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,289
)
 
758

 
26,295

 
8

 
12,338

Other Revenues
 
27,922

 
1,509

 
40,917

 
3,700

 
1,849

Total Affiliated Revenues
 
$
318,199

 
$
268,408

 
$
847,294

 
$
22,603

 
$
37,441



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Affiliated Purchases
Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement (a)
 
$
4,661

 
$
1,635

 
$
140

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
976

 
1

Direct Purchases from West Affiliates
 
—

 
—

 
—

 
10,048

 
3,765

Direct Purchases from AGR
 
—

 
—

 
1,148,216

 
—

 
—

Direct Purchases from AEPEP
 
—

 
—

 
44,344

 
—

 
—

Direct Purchases from AEGCo
 
—

 
268,337

 
—

 
—

 
—

Total Affiliated Purchases
 
$
4,661

 
$
269,972

 
$
1,192,700

 
$
11,024

 
$
3,766

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
830,954

 
$
181,688

 
$
199,283

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
1,481

 
411

Direct Purchases from West Affiliates
 
5

 
3

 
6

 
35,410

 
10,761

Direct Purchases from AEGCo
 
—

 
251,518

 
148,459

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
1,984

 
—

 
—

Total Affiliated Purchases
 
$
830,959

 
$
433,209

 
$
349,732

 
$
36,891

 
$
11,172

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
661,185

 
$
147,502

 
$
174,240

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
683

 
368

Direct Purchases from West Affiliates
 
53

 
36

 
75

 
23,695

 
18,861

Direct Purchases from AEGCo
 
—

 
238,866

 
203,583

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
2,808

 
—

 
—

Total Affiliated Purchases
 
$
661,238

 
$
386,404

 
$
380,706

 
$
24,378

 
$
19,229



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Transmission Agreement
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
84,667

 
$
40,609

 
$
20,264

I&M
 
39,707

 
19,947

 
5,689

OPCo
 
16,989

 
8,946

 
6,090
Coal Transloading
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
APCo
 
$
1

 
$
—

I&M
 
16,186

 
6,820

OPCo
 
—

 
322


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
(11
)
(a)
$
942

 
I&M
 
15,596

(b)
32,639

(b)

(a)
Includes annual true-up of 2012 estimated revenues.
(b)
Includes $7.3 million and $14.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Railcar Maintenance
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
I&M
 
$
2,497

 
$
1,073

OPCo
 
—

 
41

PSO
 
310

 
106

SWEPCo
 
3,275

 
1,237


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
3

 
$
88

 
I&M
 
1,285

(a)
3,343

(a)
PSO
 
59

 
281

 
SWEPCo
 
1,204

 
2,102

 

(a)
Includes $608 thousand and $1.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Barging, Urea Transloading and Other Services
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
22,746

 
$
19,719

 
$
19,961

AGR
 
5,195

 
—

 
—

APCo
 
36,064

 
30,876

 
34,725

KPCo
 
5,031

 
50

 
74

OPCo
 
—

 
40,562

 
39,956

AEP River Operations LLC – (Nonutility Subsidiary of AEP)
 
25,253

 
22,648

 
20,917
Central Machine Shop
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
70

 
$
26

 
$
80

AGR
 
2,842

 
—

 
—

I&M
 
1,704

 
2,451

 
1,280

KPCo
 
1,180

 
687

 
277

OPCo
 
—

 
4,679

 
3,838

PSO
 
321

 
606

 
1,198

SWEPCo
 
72

 
168

 
145
Affiliate Railcar Agreement
December 31, 2014
Billing Company
 
 
 
 
 
 
 
 
 
Billed Company
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
(in thousands)
AGR
 
$
(27
)
 
$
—

 
$
—

 
$
—

I&M
 
331

 
—

 
133

 
1,078

PSO
 
56

 
1,275

 
—

 
652

SWEPCo
 
96

 
2,159

 
183

 
—

December 31, 2013
Billing Company
 
 
 
 
 
 
 
 
 
 
 
Billed Company
 
AGR
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
 
(in thousands)
AGR
 
$
—

 
$
698

 
$
33

 
$
2

 
$
19

APCo
 
775

 
—

 
—

 
—

 
—

I&M
 
(391
)
 
507

 
—

 
195

 
854

PSO
 
(90
)
 
20

 
595

 
—

 
329

SWEPCo
 
(245
)
 
140

 
1,395

 
43

 
—
Ownership and Investment in OVEC
 
 
December 31, 2014
Company
 
Ownership
 
Investment
 
 
 
 
(in thousands)
AEP
 
39.17
%
 
$
3,978

OPCo
 
4.30
%
 
430

Total
 
43.47
%
 
$
4,408
Purchased Power from OVEC
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
96,905

 
$
104,396

 
$
98,417

I&M
 
48,487

 
52,230

 
49,239

OPCo
 
123,101

 
132,607

 
125,013
Related Party Sales of Property
Sales
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
3,031

 
$
3,212

 
$
6,643

I&M
 
1,256

 
5,031

 
3,296

OPCo
 
532

 
59,818

 
4,163

PSO
 
510

 
5,651

 
1,782

SWEPCo
 
1,216

 
1,617

 
1,731
Related Party Purchases of Property
Purchases
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
860

 
$
5,199

 
$
2,522

I&M
 
1,352

 
964

 
285

OPCo
 
1,902

 
5,311

 
10,608

PSO
 
2,079

 
1,710

 
1,867

SWEPCo
 
4,023

 
8,440

 
7,266
Indiana Michigan Power Co [Member]  
Affiliated Revenues
Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement (a)
 
$
184

 
$
503

 
$
1,121

 
$
—

 
$
—

Direct Sales to East Affiliates
 
141,721

 
—

 
—

 
3,765

 
10,048

Direct Sales to West Affiliates
 
614

 
363

 
—

 
—

 
328

Direct Sales to AEPEP
 
—

 
—

 
44,121

 
—

 
—

Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,665
)
 
1,675

 
104,052

 
8

 
14,119

Other Revenues
 
3,583

 
1,657

 
15,922

 
3,281

 
1,783

Total Affiliated Revenues
 
$
144,437

 
$
4,198

 
$
165,216

 
$
7,054

 
$
26,278

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
193,651

 
$
218,164

 
$
924,313

 
$
—

 
$
—

Direct Sales to East Affiliates
 
129,014

 
—

 
152,689

 
14

 
1

Direct Sales to West Affiliates
 
578

 
391

 
804

 
10,761

 
35,410

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(136
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
461

 
(681
)
 
53,405

 
—

 
14,715

Other Revenues
 
23,780

 
1,525

 
35,643

 
3,471

 
1,822

Total Affiliated Revenues
 
$
347,484

 
$
219,399

 
$
1,166,854

 
$
14,246

 
$
51,812

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
166,733

 
$
265,923

 
$
643,486

 
$
—

 
$
—

Direct Sales to East Affiliates
 
124,519

 
—

 
136,142

 
34

 
142

Direct Sales to West Affiliates
 
314

 
218

 
454

 
18,861

 
23,695

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(583
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,289
)
 
758

 
26,295

 
8

 
12,338

Other Revenues
 
27,922

 
1,509

 
40,917

 
3,700

 
1,849

Total Affiliated Revenues
 
$
318,199

 
$
268,408

 
$
847,294

 
$
22,603

 
$
37,441



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Affiliated Purchases
Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement (a)
 
$
4,661

 
$
1,635

 
$
140

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
976

 
1

Direct Purchases from West Affiliates
 
—

 
—

 
—

 
10,048

 
3,765

Direct Purchases from AGR
 
—

 
—

 
1,148,216

 
—

 
—

Direct Purchases from AEPEP
 
—

 
—

 
44,344

 
—

 
—

Direct Purchases from AEGCo
 
—

 
268,337

 
—

 
—

 
—

Total Affiliated Purchases
 
$
4,661

 
$
269,972

 
$
1,192,700

 
$
11,024

 
$
3,766

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
830,954

 
$
181,688

 
$
199,283

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
1,481

 
411

Direct Purchases from West Affiliates
 
5

 
3

 
6

 
35,410

 
10,761

Direct Purchases from AEGCo
 
—

 
251,518

 
148,459

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
1,984

 
—

 
—

Total Affiliated Purchases
 
$
830,959

 
$
433,209

 
$
349,732

 
$
36,891

 
$
11,172

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
661,185

 
$
147,502

 
$
174,240

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
683

 
368

Direct Purchases from West Affiliates
 
53

 
36

 
75

 
23,695

 
18,861

Direct Purchases from AEGCo
 
—

 
238,866

 
203,583

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
2,808

 
—

 
—

Total Affiliated Purchases
 
$
661,238

 
$
386,404

 
$
380,706

 
$
24,378

 
$
19,229



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Transmission Agreement
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
84,667

 
$
40,609

 
$
20,264

I&M
 
39,707

 
19,947

 
5,689

OPCo
 
16,989

 
8,946

 
6,090
Coal Transloading
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
APCo
 
$
1

 
$
—

I&M
 
16,186

 
6,820

OPCo
 
—

 
322


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
(11
)
(a)
$
942

 
I&M
 
15,596

(b)
32,639

(b)

(a)
Includes annual true-up of 2012 estimated revenues.
(b)
Includes $7.3 million and $14.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Railcar Maintenance
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
I&M
 
$
2,497

 
$
1,073

OPCo
 
—

 
41

PSO
 
310

 
106

SWEPCo
 
3,275

 
1,237


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
3

 
$
88

 
I&M
 
1,285

(a)
3,343

(a)
PSO
 
59

 
281

 
SWEPCo
 
1,204

 
2,102

 

(a)
Includes $608 thousand and $1.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Barging, Urea Transloading and Other Services
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
22,746

 
$
19,719

 
$
19,961

AGR
 
5,195

 
—

 
—

APCo
 
36,064

 
30,876

 
34,725

KPCo
 
5,031

 
50

 
74

OPCo
 
—

 
40,562

 
39,956

AEP River Operations LLC – (Nonutility Subsidiary of AEP)
 
25,253

 
22,648

 
20,917
Central Machine Shop
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
70

 
$
26

 
$
80

AGR
 
2,842

 
—

 
—

I&M
 
1,704

 
2,451

 
1,280

KPCo
 
1,180

 
687

 
277

OPCo
 
—

 
4,679

 
3,838

PSO
 
321

 
606

 
1,198

SWEPCo
 
72

 
168

 
145
Affiliate Railcar Agreement
December 31, 2014
Billing Company
 
 
 
 
 
 
 
 
 
Billed Company
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
(in thousands)
AGR
 
$
(27
)
 
$
—

 
$
—

 
$
—

I&M
 
331

 
—

 
133

 
1,078

PSO
 
56

 
1,275

 
—

 
652

SWEPCo
 
96

 
2,159

 
183

 
—

December 31, 2013
Billing Company
 
 
 
 
 
 
 
 
 
 
 
Billed Company
 
AGR
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
 
(in thousands)
AGR
 
$
—

 
$
698

 
$
33

 
$
2

 
$
19

APCo
 
775

 
—

 
—

 
—

 
—

I&M
 
(391
)
 
507

 
—

 
195

 
854

PSO
 
(90
)
 
20

 
595

 
—

 
329

SWEPCo
 
(245
)
 
140

 
1,395

 
43

 
—
Ownership and Investment in OVEC
 
 
December 31, 2014
Company
 
Ownership
 
Investment
 
 
 
 
(in thousands)
AEP
 
39.17
%
 
$
3,978

OPCo
 
4.30
%
 
430

Total
 
43.47
%
 
$
4,408
Purchased Power from OVEC
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
96,905

 
$
104,396

 
$
98,417

I&M
 
48,487

 
52,230

 
49,239

OPCo
 
123,101

 
132,607

 
125,013
Related Party Sales of Property
Sales
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
3,031

 
$
3,212

 
$
6,643

I&M
 
1,256

 
5,031

 
3,296

OPCo
 
532

 
59,818

 
4,163

PSO
 
510

 
5,651

 
1,782

SWEPCo
 
1,216

 
1,617

 
1,731
Related Party Purchases of Property
Purchases
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
860

 
$
5,199

 
$
2,522

I&M
 
1,352

 
964

 
285

OPCo
 
1,902

 
5,311

 
10,608

PSO
 
2,079

 
1,710

 
1,867

SWEPCo
 
4,023

 
8,440

 
7,266
Ohio Power Co [Member]  
Affiliated Revenues
Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement (a)
 
$
184

 
$
503

 
$
1,121

 
$
—

 
$
—

Direct Sales to East Affiliates
 
141,721

 
—

 
—

 
3,765

 
10,048

Direct Sales to West Affiliates
 
614

 
363

 
—

 
—

 
328

Direct Sales to AEPEP
 
—

 
—

 
44,121

 
—

 
—

Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,665
)
 
1,675

 
104,052

 
8

 
14,119

Other Revenues
 
3,583

 
1,657

 
15,922

 
3,281

 
1,783

Total Affiliated Revenues
 
$
144,437

 
$
4,198

 
$
165,216

 
$
7,054

 
$
26,278

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
193,651

 
$
218,164

 
$
924,313

 
$
—

 
$
—

Direct Sales to East Affiliates
 
129,014

 
—

 
152,689

 
14

 
1

Direct Sales to West Affiliates
 
578

 
391

 
804

 
10,761

 
35,410

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(136
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
461

 
(681
)
 
53,405

 
—

 
14,715

Other Revenues
 
23,780

 
1,525

 
35,643

 
3,471

 
1,822

Total Affiliated Revenues
 
$
347,484

 
$
219,399

 
$
1,166,854

 
$
14,246

 
$
51,812

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
166,733

 
$
265,923

 
$
643,486

 
$
—

 
$
—

Direct Sales to East Affiliates
 
124,519

 
—

 
136,142

 
34

 
142

Direct Sales to West Affiliates
 
314

 
218

 
454

 
18,861

 
23,695

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(583
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,289
)
 
758

 
26,295

 
8

 
12,338

Other Revenues
 
27,922

 
1,509

 
40,917

 
3,700

 
1,849

Total Affiliated Revenues
 
$
318,199

 
$
268,408

 
$
847,294

 
$
22,603

 
$
37,441



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Affiliated Purchases
Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement (a)
 
$
4,661

 
$
1,635

 
$
140

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
976

 
1

Direct Purchases from West Affiliates
 
—

 
—

 
—

 
10,048

 
3,765

Direct Purchases from AGR
 
—

 
—

 
1,148,216

 
—

 
—

Direct Purchases from AEPEP
 
—

 
—

 
44,344

 
—

 
—

Direct Purchases from AEGCo
 
—

 
268,337

 
—

 
—

 
—

Total Affiliated Purchases
 
$
4,661

 
$
269,972

 
$
1,192,700

 
$
11,024

 
$
3,766

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
830,954

 
$
181,688

 
$
199,283

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
1,481

 
411

Direct Purchases from West Affiliates
 
5

 
3

 
6

 
35,410

 
10,761

Direct Purchases from AEGCo
 
—

 
251,518

 
148,459

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
1,984

 
—

 
—

Total Affiliated Purchases
 
$
830,959

 
$
433,209

 
$
349,732

 
$
36,891

 
$
11,172

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
661,185

 
$
147,502

 
$
174,240

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
683

 
368

Direct Purchases from West Affiliates
 
53

 
36

 
75

 
23,695

 
18,861

Direct Purchases from AEGCo
 
—

 
238,866

 
203,583

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
2,808

 
—

 
—

Total Affiliated Purchases
 
$
661,238

 
$
386,404

 
$
380,706

 
$
24,378

 
$
19,229



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Transmission Agreement
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
84,667

 
$
40,609

 
$
20,264

I&M
 
39,707

 
19,947

 
5,689

OPCo
 
16,989

 
8,946

 
6,090
Coal Transloading
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
APCo
 
$
1

 
$
—

I&M
 
16,186

 
6,820

OPCo
 
—

 
322


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
(11
)
(a)
$
942

 
I&M
 
15,596

(b)
32,639

(b)

(a)
Includes annual true-up of 2012 estimated revenues.
(b)
Includes $7.3 million and $14.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Railcar Maintenance
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
I&M
 
$
2,497

 
$
1,073

OPCo
 
—

 
41

PSO
 
310

 
106

SWEPCo
 
3,275

 
1,237


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
3

 
$
88

 
I&M
 
1,285

(a)
3,343

(a)
PSO
 
59

 
281

 
SWEPCo
 
1,204

 
2,102

 

(a)
Includes $608 thousand and $1.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Barging, Urea Transloading and Other Services
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
22,746

 
$
19,719

 
$
19,961

AGR
 
5,195

 
—

 
—

APCo
 
36,064

 
30,876

 
34,725

KPCo
 
5,031

 
50

 
74

OPCo
 
—

 
40,562

 
39,956

AEP River Operations LLC – (Nonutility Subsidiary of AEP)
 
25,253

 
22,648

 
20,917
Central Machine Shop
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
70

 
$
26

 
$
80

AGR
 
2,842

 
—

 
—

I&M
 
1,704

 
2,451

 
1,280

KPCo
 
1,180

 
687

 
277

OPCo
 
—

 
4,679

 
3,838

PSO
 
321

 
606

 
1,198

SWEPCo
 
72

 
168

 
145
Ownership and Investment in OVEC
 
 
December 31, 2014
Company
 
Ownership
 
Investment
 
 
 
 
(in thousands)
AEP
 
39.17
%
 
$
3,978

OPCo
 
4.30
%
 
430

Total
 
43.47
%
 
$
4,408
Purchased Power from OVEC
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
96,905

 
$
104,396

 
$
98,417

I&M
 
48,487

 
52,230

 
49,239

OPCo
 
123,101

 
132,607

 
125,013
Related Party Sales of Property
Sales
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
3,031

 
$
3,212

 
$
6,643

I&M
 
1,256

 
5,031

 
3,296

OPCo
 
532

 
59,818

 
4,163

PSO
 
510

 
5,651

 
1,782

SWEPCo
 
1,216

 
1,617

 
1,731
Related Party Purchases of Property
Purchases
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
860

 
$
5,199

 
$
2,522

I&M
 
1,352

 
964

 
285

OPCo
 
1,902

 
5,311

 
10,608

PSO
 
2,079

 
1,710

 
1,867

SWEPCo
 
4,023

 
8,440

 
7,266
Public Service Co Of Oklahoma [Member]  
Affiliated Revenues
Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement (a)
 
$
184

 
$
503

 
$
1,121

 
$
—

 
$
—

Direct Sales to East Affiliates
 
141,721

 
—

 
—

 
3,765

 
10,048

Direct Sales to West Affiliates
 
614

 
363

 
—

 
—

 
328

Direct Sales to AEPEP
 
—

 
—

 
44,121

 
—

 
—

Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,665
)
 
1,675

 
104,052

 
8

 
14,119

Other Revenues
 
3,583

 
1,657

 
15,922

 
3,281

 
1,783

Total Affiliated Revenues
 
$
144,437

 
$
4,198

 
$
165,216

 
$
7,054

 
$
26,278

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
193,651

 
$
218,164

 
$
924,313

 
$
—

 
$
—

Direct Sales to East Affiliates
 
129,014

 
—

 
152,689

 
14

 
1

Direct Sales to West Affiliates
 
578

 
391

 
804

 
10,761

 
35,410

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(136
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
461

 
(681
)
 
53,405

 
—

 
14,715

Other Revenues
 
23,780

 
1,525

 
35,643

 
3,471

 
1,822

Total Affiliated Revenues
 
$
347,484

 
$
219,399

 
$
1,166,854

 
$
14,246

 
$
51,812

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
166,733

 
$
265,923

 
$
643,486

 
$
—

 
$
—

Direct Sales to East Affiliates
 
124,519

 
—

 
136,142

 
34

 
142

Direct Sales to West Affiliates
 
314

 
218

 
454

 
18,861

 
23,695

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(583
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,289
)
 
758

 
26,295

 
8

 
12,338

Other Revenues
 
27,922

 
1,509

 
40,917

 
3,700

 
1,849

Total Affiliated Revenues
 
$
318,199

 
$
268,408

 
$
847,294

 
$
22,603

 
$
37,441



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Affiliated Purchases
Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement (a)
 
$
4,661

 
$
1,635

 
$
140

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
976

 
1

Direct Purchases from West Affiliates
 
—

 
—

 
—

 
10,048

 
3,765

Direct Purchases from AGR
 
—

 
—

 
1,148,216

 
—

 
—

Direct Purchases from AEPEP
 
—

 
—

 
44,344

 
—

 
—

Direct Purchases from AEGCo
 
—

 
268,337

 
—

 
—

 
—

Total Affiliated Purchases
 
$
4,661

 
$
269,972

 
$
1,192,700

 
$
11,024

 
$
3,766

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
830,954

 
$
181,688

 
$
199,283

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
1,481

 
411

Direct Purchases from West Affiliates
 
5

 
3

 
6

 
35,410

 
10,761

Direct Purchases from AEGCo
 
—

 
251,518

 
148,459

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
1,984

 
—

 
—

Total Affiliated Purchases
 
$
830,959

 
$
433,209

 
$
349,732

 
$
36,891

 
$
11,172

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
661,185

 
$
147,502

 
$
174,240

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
683

 
368

Direct Purchases from West Affiliates
 
53

 
36

 
75

 
23,695

 
18,861

Direct Purchases from AEGCo
 
—

 
238,866

 
203,583

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
2,808

 
—

 
—

Total Affiliated Purchases
 
$
661,238

 
$
386,404

 
$
380,706

 
$
24,378

 
$
19,229



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Transmission Coordination Agreement
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
PSO
 
$
14,100

 
$
14,700

 
$
12,300

SWEPCo
 
(14,100
)
 
(14,700
)
 
(12,300
)
Railcar Maintenance
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
I&M
 
$
2,497

 
$
1,073

OPCo
 
—

 
41

PSO
 
310

 
106

SWEPCo
 
3,275

 
1,237


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
3

 
$
88

 
I&M
 
1,285

(a)
3,343

(a)
PSO
 
59

 
281

 
SWEPCo
 
1,204

 
2,102

 

(a)
Includes $608 thousand and $1.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Central Machine Shop
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
70

 
$
26

 
$
80

AGR
 
2,842

 
—

 
—

I&M
 
1,704

 
2,451

 
1,280

KPCo
 
1,180

 
687

 
277

OPCo
 
—

 
4,679

 
3,838

PSO
 
321

 
606

 
1,198

SWEPCo
 
72

 
168

 
145
Affiliate Railcar Agreement
December 31, 2014
Billing Company
 
 
 
 
 
 
 
 
 
Billed Company
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
(in thousands)
AGR
 
$
(27
)
 
$
—

 
$
—

 
$
—

I&M
 
331

 
—

 
133

 
1,078

PSO
 
56

 
1,275

 
—

 
652

SWEPCo
 
96

 
2,159

 
183

 
—

December 31, 2013
Billing Company
 
 
 
 
 
 
 
 
 
 
 
Billed Company
 
AGR
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
 
(in thousands)
AGR
 
$
—

 
$
698

 
$
33

 
$
2

 
$
19

APCo
 
775

 
—

 
—

 
—

 
—

I&M
 
(391
)
 
507

 
—

 
195

 
854

PSO
 
(90
)
 
20

 
595

 
—

 
329

SWEPCo
 
(245
)
 
140

 
1,395

 
43

 
—
Related Party Sales of Property
Sales
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
3,031

 
$
3,212

 
$
6,643

I&M
 
1,256

 
5,031

 
3,296

OPCo
 
532

 
59,818

 
4,163

PSO
 
510

 
5,651

 
1,782

SWEPCo
 
1,216

 
1,617

 
1,731
Related Party Purchases of Property
Purchases
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
860

 
$
5,199

 
$
2,522

I&M
 
1,352

 
964

 
285

OPCo
 
1,902

 
5,311

 
10,608

PSO
 
2,079

 
1,710

 
1,867

SWEPCo
 
4,023

 
8,440

 
7,266
Southwestern Electric Power Co [Member]  
Affiliated Revenues
Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement (a)
 
$
184

 
$
503

 
$
1,121

 
$
—

 
$
—

Direct Sales to East Affiliates
 
141,721

 
—

 
—

 
3,765

 
10,048

Direct Sales to West Affiliates
 
614

 
363

 
—

 
—

 
328

Direct Sales to AEPEP
 
—

 
—

 
44,121

 
—

 
—

Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,665
)
 
1,675

 
104,052

 
8

 
14,119

Other Revenues
 
3,583

 
1,657

 
15,922

 
3,281

 
1,783

Total Affiliated Revenues
 
$
144,437

 
$
4,198

 
$
165,216

 
$
7,054

 
$
26,278

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
193,651

 
$
218,164

 
$
924,313

 
$
—

 
$
—

Direct Sales to East Affiliates
 
129,014

 
—

 
152,689

 
14

 
1

Direct Sales to West Affiliates
 
578

 
391

 
804

 
10,761

 
35,410

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(136
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
461

 
(681
)
 
53,405

 
—

 
14,715

Other Revenues
 
23,780

 
1,525

 
35,643

 
3,471

 
1,822

Total Affiliated Revenues
 
$
347,484

 
$
219,399

 
$
1,166,854

 
$
14,246

 
$
51,812

Related Party Revenues
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Sales under Interconnection Agreement
 
$
166,733

 
$
265,923

 
$
643,486

 
$
—

 
$
—

Direct Sales to East Affiliates
 
124,519

 
—

 
136,142

 
34

 
142

Direct Sales to West Affiliates
 
314

 
218

 
454

 
18,861

 
23,695

Direct Sales to AEPEP
 
—

 
—

 
—

 
—

 
(583
)
Transmission Agreement and Transmission Coordination Agreement Sales
 
(1,289
)
 
758

 
26,295

 
8

 
12,338

Other Revenues
 
27,922

 
1,509

 
40,917

 
3,700

 
1,849

Total Affiliated Revenues
 
$
318,199

 
$
268,408

 
$
847,294

 
$
22,603

 
$
37,441



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Affiliated Purchases
Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement (a)
 
$
4,661

 
$
1,635

 
$
140

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
976

 
1

Direct Purchases from West Affiliates
 
—

 
—

 
—

 
10,048

 
3,765

Direct Purchases from AGR
 
—

 
—

 
1,148,216

 
—

 
—

Direct Purchases from AEPEP
 
—

 
—

 
44,344

 
—

 
—

Direct Purchases from AEGCo
 
—

 
268,337

 
—

 
—

 
—

Total Affiliated Purchases
 
$
4,661

 
$
269,972

 
$
1,192,700

 
$
11,024

 
$
3,766

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
830,954

 
$
181,688

 
$
199,283

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
1,481

 
411

Direct Purchases from West Affiliates
 
5

 
3

 
6

 
35,410

 
10,761

Direct Purchases from AEGCo
 
—

 
251,518

 
148,459

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
1,984

 
—

 
—

Total Affiliated Purchases
 
$
830,959

 
$
433,209

 
$
349,732

 
$
36,891

 
$
11,172

Related Party Purchases
 
APCo
 
I&M
 
OPCo
 
PSO
 
SWEPCo
 
 
(in thousands)
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
 
Purchases under Interconnection Agreement
 
$
661,185

 
$
147,502

 
$
174,240

 
$
—

 
$
—

Direct Purchases from East Affiliates
 
—

 
—

 
—

 
683

 
368

Direct Purchases from West Affiliates
 
53

 
36

 
75

 
23,695

 
18,861

Direct Purchases from AEGCo
 
—

 
238,866

 
203,583

 
—

 
—

Natural Gas Purchases from AEPES
 
—

 
—

 
2,808

 
—

 
—

Total Affiliated Purchases
 
$
661,238

 
$
386,404

 
$
380,706

 
$
24,378

 
$
19,229



(a)    Includes December 2013 true-up activity subsequent to agreement termination.
Transmission Coordination Agreement
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
PSO
 
$
14,100

 
$
14,700

 
$
12,300

SWEPCo
 
(14,100
)
 
(14,700
)
 
(12,300
)
Railcar Maintenance
AEGCo
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
 
(in thousands)
I&M
 
$
2,497

 
$
1,073

OPCo
 
—

 
41

PSO
 
310

 
106

SWEPCo
 
3,275

 
1,237


OPCo
 
 
Years Ended December 31,
 
Company
 
2013
 
2012
 
 
 
(in thousands)
 
APCo
 
$
3

 
$
88

 
I&M
 
1,285

(a)
3,343

(a)
PSO
 
59

 
281

 
SWEPCo
 
1,204

 
2,102

 

(a)
Includes $608 thousand and $1.5 million in 2013 and 2012, respectively, of amounts purchased by I&M on behalf of AEGCo for Rockport Plant through July 31, 2013.
Central Machine Shop
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
AEGCo
 
$
70

 
$
26

 
$
80

AGR
 
2,842

 
—

 
—

I&M
 
1,704

 
2,451

 
1,280

KPCo
 
1,180

 
687

 
277

OPCo
 
—

 
4,679

 
3,838

PSO
 
321

 
606

 
1,198

SWEPCo
 
72

 
168

 
145
Affiliate Railcar Agreement
December 31, 2014
Billing Company
 
 
 
 
 
 
 
 
 
Billed Company
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
(in thousands)
AGR
 
$
(27
)
 
$
—

 
$
—

 
$
—

I&M
 
331

 
—

 
133

 
1,078

PSO
 
56

 
1,275

 
—

 
652

SWEPCo
 
96

 
2,159

 
183

 
—

December 31, 2013
Billing Company
 
 
 
 
 
 
 
 
 
 
 
Billed Company
 
AGR
 
APCo
 
I&M
 
PSO
 
SWEPCo
 
 
(in thousands)
AGR
 
$
—

 
$
698

 
$
33

 
$
2

 
$
19

APCo
 
775

 
—

 
—

 
—

 
—

I&M
 
(391
)
 
507

 
—

 
195

 
854

PSO
 
(90
)
 
20

 
595

 
—

 
329

SWEPCo
 
(245
)
 
140

 
1,395

 
43

 
—
Related Party Sales of Property
Sales
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
3,031

 
$
3,212

 
$
6,643

I&M
 
1,256

 
5,031

 
3,296

OPCo
 
532

 
59,818

 
4,163

PSO
 
510

 
5,651

 
1,782

SWEPCo
 
1,216

 
1,617

 
1,731
Related Party Purchases of Property
Purchases
 
 
Years Ended December 31,
Company
 
2014
 
2013
 
2012
 
 
(in thousands)
APCo
 
$
860

 
$
5,199

 
$
2,522

I&M
 
1,352

 
964

 
285

OPCo
 
1,902

 
5,311

 
10,608

PSO
 
2,079

 
1,710

 
1,867

SWEPCo
 
4,023

 
8,440

 
7,266