Property, Plant and Equipment |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2017 | | AEP | | AEP Texas | | AEPTCo | | APCo | | I&M | | OPCo | | PSO | | SWEPCo | | | | (in millions) | | Regulated Property, Plant and Equipment | | | | | | | | | | | | | | | | | | Generation | | $ | 20,406.5 |
| (a) | $ | — |
| | $ | — |
| | $ | 6,446.9 |
| | $ | 4,445.9 |
| | $ | — |
| | $ | 1,577.2 |
| | $ | 4,624.9 |
| (a) | Transmission | | 18,942.3 |
| | 3,053.6 |
| | 5,336.1 |
| | 3,019.9 |
| | 1,504.0 |
| | 2,419.2 |
| | 858.8 |
| | 1,679.8 |
| | Distribution | | 19,865.9 |
| | 3,718.6 |
| | — |
| | 3,763.8 |
| | 2,069.3 |
| | 4,626.4 |
| | 2,445.1 |
| | 2,095.8 |
| | Other | | 3,224.8 |
| | 457.6 |
| | 130.0 |
| | 399.5 |
| | 552.3 |
| | 485.5 |
| | 282.0 |
| | 416.8 |
| | CWIP | | 3,972.6 |
| (a) | 834.4 |
| | 1,312.7 |
| | 483.0 |
| | 460.2 |
| | 410.1 |
| | 111.3 |
| | 220.7 |
| (a) | Less: Accumulated Depreciation | | 16,906.7 |
| | 1,399.4 |
| | 170.4 |
| | 3,891.1 |
| | 3,011.7 |
| | 2,183.9 |
| | 1,393.6 |
| | 2,520.5 |
| | Total Regulated Property, Plant and Equipment - Net | | 49,505.4 |
| | 6,664.8 |
| | 6,608.4 |
| | 10,222.0 |
| | 6,020.0 |
| | 5,757.3 |
| | 3,880.8 |
| | 6,517.5 |
| | Nonregulated Property, Plant and Equipment - Net | | 756.1 |
| | 160.3 |
| | 1.4 |
| | 23.1 |
| | 30.4 |
| | 9.5 |
| | 5.4 |
| | 114.5 |
| | Total Property, Plant and Equipment - Net | | $ | 50,261.5 |
| | $ | 6,825.1 |
| | $ | 6,609.8 |
| | $ | 10,245.1 |
| | $ | 6,050.4 |
| | $ | 5,766.8 |
| | $ | 3,886.2 |
| | $ | 6,632.0 |
| |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2016 | | AEP | | AEP Texas | | AEPTCo | | APCo | | I&M | | OPCo | | PSO | | SWEPCo | | | | (in millions) | | Regulated Property, Plant and Equipment | | | | | | | | | | | | | | | | | | Generation | | $ | 19,703.9 |
| (a) | $ | — |
| | $ | — |
| | $ | 6,332.8 |
| | $ | 4,056.1 |
| | $ | — |
| | $ | 1,559.3 |
| | $ | 4,607.6 |
| (a) | Transmission | | 16,658.6 |
| | 2,623.6 |
| | 3,973.5 |
| | 2,796.9 |
| | 1,472.8 |
| | 2,319.2 |
| | 832.8 |
| | 1,584.2 |
| | Distribution | | 18,898.2 |
| | 3,527.2 |
| | — |
| | 3,569.1 |
| | 1,899.3 |
| | 4,457.2 |
| | 2,322.4 |
| | 2,020.6 |
| | Other | | 2,902.0 |
| | 432.1 |
| | 98.3 |
| | 345.1 |
| | 507.7 |
| | 433.4 |
| | 227.3 |
| | 399.3 |
| | CWIP | | 3,072.2 |
| (a) | 385.0 |
| | 981.3 |
| | 390.3 |
| | 654.2 |
| | 221.5 |
| | 148.2 |
| | 113.7 |
| (a) | Less: Accumulated Depreciation | | 16,101.5 |
| | 1,354.4 |
| | 99.6 |
| | 3,631.5 |
| | 2,989.9 |
| | 2,115.1 |
| | 1,272.7 |
| | 2,411.5 |
| | Total Regulated Property, Plant and Equipment - Net | | 45,133.4 |
| | 5,613.5 |
| | 4,953.5 |
| | 9,802.7 |
| | 5,600.2 |
| | 5,316.2 |
| | 3,817.3 |
| | 6,313.9 |
| | Nonregulated Property, Plant and Equipment - Net | | 505.9 |
| | 167.2 |
| | 1.1 |
| | 23.1 |
| | 27.3 |
| | 9.4 |
| | 5.9 |
| | 115.6 |
| | Total Property, Plant and Equipment - Net | | $ | 45,639.3 |
| (b) | $ | 5,780.7 |
| | $ | 4,954.6 |
| | $ | 9,825.8 |
| | $ | 5,627.5 |
| | $ | 5,325.6 |
| | $ | 3,823.2 |
| | $ | 6,429.5 |
| |
| | (a) | AEP and SWEPCo’s regulated generation and regulated CWIP include amounts related to SWEPCo’s Arkansas jurisdictional share of the Turk Plant. |
| | (b) | Amount excludes $1.8 billion of Property, Plant and Equipment - Net classified as Assets Held for Sale on the balance sheet. See “Gavin, Waterford, Darby and Lawrenceburg Plants (Generation & Marketing Segment)” section of Note 7 for additional information. |
|
Jointly-owned Electric Facilities |
| | | | | | | | | | | | | | | | | | | | | | | Registrant’s Share as of December 31, 2017 | | Fuel Type | | Percent of Ownership | | Utility Plant in Service | | Construction Work in Progress | | Accumulated Depreciation | | | | | | (in millions) | AEP | | | | | | | | | | Conesville Generating Station, Unit 4 (a)(k)(l) | Coal | | 83.5 | % | | $ | 2.1 |
| | $ | 4.2 |
| | $ | 0.1 |
| J.M. Stuart Generating Station (b)(k) | Coal | | 26.0 | % | | — |
| | — |
| | — |
| Dolet Hills Generating Station, Unit 1 (i) | Lignite | | 40.2 | % | | 343.1 |
| | 5.3 |
| | 214.2 |
| Flint Creek Generating Station, Unit 1 (j) | Coal | | 50.0 | % | | 364.8 |
| | 8.9 |
| | 81.6 |
| Pirkey Generating Station, Unit 1 (j) | Lignite | | 85.9 | % | | 589.8 |
| | 7.8 |
| | 406.3 |
| Oklaunion Generating Station, Unit 1 (h) | Coal | | 70.3 | % | | 456.4 |
| | 1.9 |
| | 254.6 |
| Turk Generating Plant (j)(n) | Coal | | 73.3 | % | | 1,580.4 |
| | 3.2 |
| | 166.6 |
| Transmission | NA | | (d) |
| | 62.7 |
| | 0.3 |
| | 46.1 |
| Total | | | | | $ | 3,399.3 |
| | $ | 31.6 |
| | $ | 1,169.5 |
| | | | | | | | | | | AEP Texas | | | | | | | | | | Oklaunion Generating Station, Unit 1 (h) | Coal | | 54.7 | % | | $ | 350.7 |
| | $ | 1.3 |
| | $ | 194.1 |
| | | | | | | | | | | I&M | | | | | | | | | | Rockport Generating Plant (e)(f)(g) | Coal | | 50.0 | % | | $ | 1,093.9 |
| | $ | 28.2 |
| | $ | 562.6 |
| | | | | | | | | | | PSO | | | | | | | | | | Oklaunion Generating Station, Unit 1 (h) | Coal | | 15.6 | % | | $ | 105.7 |
| | $ | 0.6 |
| | $ | 60.5 |
| | | | | | | | | | | SWEPCo | | | | | | | | | | Dolet Hills Generating Station, Unit 1 (i) | Lignite | | 40.2 | % | | $ | 343.1 |
| | $ | 5.3 |
| | $ | 214.2 |
| Flint Creek Generating Station, Unit 1 (j) | Coal | | 50.0 | % | | 364.8 |
| | 8.9 |
| | 81.6 |
| Pirkey Generating Station, Unit 1 (j) | Lignite | | 85.9 | % | | 589.8 |
| | 7.8 |
| | 406.3 |
| Turk Generating Plant (j)(n) | Coal | | 73.3 | % | | 1,580.4 |
| | 3.2 |
| | 166.6 |
| Total | | | | | $ | 2,878.1 |
| | $ | 25.2 |
| | $ | 868.7 |
|
| | | | | | | | | | | | | | | | | | | | | | | Registrant’s Share as of December 31, 2016 | | Fuel Type | | Percent of Ownership | | Utility Plant in Service | | Construction Work in Progress | | Accumulated Depreciation | | | | | | (in millions) | AEP | | | | | | | | | | Conesville Generating Station, Unit 4 (a)(k)(l) | Coal | | 43.5 | % | | $ | 0.1 |
| | $ | 1.3 |
| | $ | — |
| J.M. Stuart Generating Station (b)(k) | Coal | | 26.0 | % | | — |
| | 0.8 |
| | — |
| Wm. H. Zimmer Generating Station (c)(k)(m) | Coal | | 25.4 | % | | — |
| | 0.3 |
| | — |
| Dolet Hills Generating Station, Unit 1 (i) | Lignite | | 40.2 | % | | 334.8 |
| | 5.0 |
| | 207.5 |
| Flint Creek Generating Station, Unit 1 (j) | Coal | | 50.0 | % | | 362.4 |
| | 3.7 |
| | 73.5 |
| Pirkey Generating Station, Unit 1 (j) | Lignite | | 85.9 | % | | 586.4 |
| | 5.7 |
| | 399.5 |
| Oklaunion Generating Station, Unit 1 (h) | Coal | | 70.3 | % | | 454.8 |
| | 1.3 |
| | 246.0 |
| Turk Generating Plant (j) | Coal | | 73.3 | % | | 1,657.3 |
| | 0.2 |
| | 138.5 |
| Transmission | NA | | (d) |
| | 62.4 |
| | 0.5 |
| | 45.1 |
| Total | | | | | $ | 3,458.2 |
| | $ | 18.8 |
| | $ | 1,110.1 |
| | | | | | | | | | | AEP Texas | | | | | | | | | | Oklaunion Generating Station, Unit 1 (h) | Coal | | 54.7 | % | | $ | 349.6 |
| | $ | 0.9 |
| | $ | 186.5 |
| | | | | | | | | | | I&M | | | | | | | | | | Rockport Generating Plant (e)(f)(g) | Coal | | 50.0 | % | | $ | 936.1 |
| | $ | 125.8 |
| | $ | 535.1 |
| | | | | | | | | | | PSO | | | | | | | | | | Oklaunion Generating Station, Unit 1 (h) | Coal | | 15.6 | % | | $ | 105.2 |
| | $ | 0.5 |
| | $ | 59.4 |
| | | | | | | | | | | SWEPCo | | | | | | | | | | Dolet Hills Generating Station, Unit 1 (i) | Lignite | | 40.2 | % | | $ | 334.8 |
| | $ | 5.0 |
| | $ | 207.5 |
| Flint Creek Generating Station, Unit 1 (j) | Coal | | 50.0 | % | | 362.4 |
| | 3.7 |
| | 73.5 |
| Pirkey Generating Station, Unit 1 (j) | Lignite | | 85.9 | % | | 586.4 |
| | 5.7 |
| | 399.5 |
| Turk Generating Plant (j) | Coal | | 73.3 | % | | 1,657.3 |
| | 0.2 |
| | 138.5 |
| Total | | | | | $ | 2,940.9 |
| | $ | 14.6 |
| | $ | 819.0 |
|
| | (b) | Operated by Dayton Power & Light Company, a non-affiliated company. |
| | (c) | Operated by Dynegy Corporation, a non-affiliated company. |
| | (d) | Varying percentages of ownership. |
| | (f) | Amounts include I&M’s 50% ownership of both Unit 1 and capital additions for Unit 2. Unit 2 is subject to an operating lease with a non-affiliated company. See the “Rockport Lease” section of Note 13. |
| | (g) | AEGCo owns 50% of Unit 1 with I&M and 50% of capital additions for Unit 2. |
| | (h) | Operated by PSO, which owns 15.6%. Also jointly-owned (54.7%) by AEP Texas and various non-affiliated companies. See the “Impairments” section of Note 7. |
| | (i) | Operated by CLECO, a non-affiliated company. |
| | (k) | Conesville Generating Station, Unit 4 was impaired as of September 30, 2016. J.M. Stuart Generating Station and Wm. H. Zimmer Generating Station were impaired as of November 30, 2016. See the “Impairments” section of Note 7. |
| | (l) | In accordance with the Asset Purchase Agreement between AGR and Dynegy Corporation dated February 2017, AGR acquired Dynegy Corporation’s 40% ownership interest in Conesville Generating Station, Unit 4. Subsequent to this transaction, AGR’s ownership percentage in Conesville Generating Station, Unit 4 is 83.5%. |
| | (m) | In accordance with the Asset Purchase Agreement between AGR and Dynegy Corporation dated February 2017, Dynegy Corporation acquired AGR’s 25.4% ownership interest in Wm. H. Zimmer Generating Station. Subsequent to this transaction, AGR has no ownership interest in Wm. H. Zimmer Generating Station. See the “Dispositions” section of Note 7. |
| | (n) | In December 2017, SWEPCo recorded a $15 million pretax impairment related to the Louisiana jurisdictional share of Turk Plant. Amount reflects the impact of the impairment. See the “Impairments” section of Note 7. |
|