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HoersdigOH6917.053Electric - Ohio19false17.1317.534117.0620317.142117.5417.07227617.5517.15771872137402317.0818Wdesk from Workiva2417.1617.5621402166317.09 C000524 SPARROW SWITCH - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0127 SPARROW LOOP, , 1, 3.98, 1233 KCM ACSR 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 Building and Property Leases, AEPSC 2021-01-012021-12-31 C000524 OH Transco Work , 4449281.48ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH-Transco Work , 9408482.87 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche I, 4.53% , 41957 2021-01-012021-12-31 C000524 0111 EAST AMSTERDAM, MILLER SWITCH, 1, 9.58, 1233 KCM ACSR 2021-01-012021-12-31 C000524 ferc:FederalTaxMember 2021-12-31 C000524 ADAMS (CSP) - OH, Transmission, , 138 , 69 , 13.09 , 60 ,  , 4 2021-12-31 C000524 OH Transco Work , 1333807.21ferc:ElectricUtilityMember 2021-12-31 C000524 0066 WAGENHALS, WEST CANTON, 1, 1.4, 565 KCM ACSS 2021-01-012021-12-31 C000524 CIRCLEVILLE - OH, Transmission, , 138 ,  ,  , 0 , STATCAP , 2021-12-31 C000524 T/OH/Transco Work , 2774291.96ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 WEST BELLAIRE - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-01-012021-12-31 C000524 0091 MUSKINGUM RIVER, TIE LINE - EAST, 1, 0.21, 1926 KCM ACSS 2021-01-012021-12-31 C000524 CARROLLTON - OH, Distribution, , 138 , 70.5 , 36.2 , 130 ,  , 1 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche E, 3.76% , 42170 2021-12-31 C000524 Senior Notes, Series M, 3.65% , 65520 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Other Minor Projects Under $1,000,000 , 20112676.64 2021-01-012021-12-31 C000524 JUNE ROAD - OH, Transmission, , 138 , 69 , 13.09 , 360 ,  , 4 2021-01-012021-12-31 C000524 Use of Jointly Owned Facility, OPCo 2021-01-012021-12-31 C000524 0180 FIREBRICK EXT - WEST, , 1, 0.75, 1590 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember T/OH/Ohio Transco work , 6500430.63 2021-12-31 C000524 Senior Notes, Series L, 3.15% , 1374280 2021-01-012021-12-31 C000524 Travel Expenses 2021-01-012021-12-31 C000524 MP-FF Transco Baseline , 1379939.86ferc:ElectricUtilityMember 2021-12-31 C000524 0112 AZALEA EXT EAST, , 1, 0.41, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Glencoe-Somerton , 14532884.36 2021-12-31 C000524 MillbrookP-SPoint Transco CI , 6508349.56 2021-01-012021-12-31 C000524 ScheduleHydroelectricGeneratingPlantStatisticsAbstract 2021-01-012021-12-31 C000524 CORRIDOR - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-01-012021-12-31 C000524 Senior Notes, Series K, 3.80% , 43628 2021-01-012021-12-31 C000524 OHTC - BlnktProj Under $3M , 20789923.82ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 Property Tax, Property Tax, OH, 2020 2020-12-31 C000524 0222 Seaman, Adams, 1, 0.26 2021-01-012021-12-31 C000524 Acquired Assets 2020-01-012020-12-31 C000524 COMMONLY OWNED: (A), , , , 2021-01-012021-12-31 C000524 0377 Culbertson Extension, , 1, 0.52, 795 KCM ACSR 2021-01-012021-12-31 C000524 Bluffton Supp Transco CI , 4065199.76 2021-01-012021-12-31 C000524 FOSTORIA CENTRAL - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 1 2021-01-012021-12-31 C000524 FERC 205 Filing 2021-12-31 C000524 TRANSMISSION 2021-01-012021-12-31 C000524 Other (provide details in footnote):ferc:GasOtherFacilitiesMember 2021-01-012021-12-31 C000524 SFAS 109 Deferred FIT 2021-01-012021-12-31 C000524 Senior Notes, Series B, Tranche C, 4.38% , 41585 2021-01-012021-12-31 C000524 0281 MINK EXTENSION, , 1, 0.11, 1272 KCM ACSR 2021-01-012021-12-31 C000524 OHTCo Work , 19786302.97 2021-01-012021-12-31 C000524 Salerno 138kV Sta Install 380 , 1121857.69ferc:ElectricUtilityMember 2021-12-31 C000524 OHTC - BlnktProj Under $3M , 20789923.82ferc:ElectricUtilityMember 2021-12-31 C000524 DILLES BOTTOM - OH, Distribution, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 FREEBYRD - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Senior Notes, Series B, Tranche F, 5.52% , 41942 2021-01-012021-12-31 C000524 WEST CAMBRIDGE - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-12-31 C000524 353 , 2021-01-012021-12-31 C000524 Senior Notes, Series A, Tranche E, 4.83% , 41351 2021-12-31 C000524 Accrued Companywide Incentive Compensation 2021-01-012021-12-31 C000524 BABBITT - OH, Transmission, , 138 ,  ,  ,  , AIR CORE REACTOR , 2021-12-31 C000524 8026 POSTON, LICK, 1, 3.93, 1233 KCM ACSS 2021-01-012021-12-31 C000524 OH Transco Work , 1282799.55ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Alpine - Trail Transco , 2911541.47 2021-01-012021-12-31 C000524 0277 Summerfield Bus Tie, , 1, 0.06, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo Supplemental , 1234297.86 2021-12-31 C000524 MP-FF Transco Baseline , 1379939.86 2021-01-012021-12-31 C000524 0278 HUTCHINGS TAP, MIDDLEBORO SW, 1, 0.04, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0222 Seaman, Adams, 1, 7.57, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ScheduleElectricPropertyLeasedToOthersAbstract 2021-01-012021-12-31 C000524 C797 ROBERTS, OSU, 1, 0.12, 1272 KCM ACSR 2021-01-012021-12-31 C000524 0279 MIDDLEBORO SW, CLINTON COUNTY (DUKE), 2, 5.1, 1033 KCM 2021-01-012021-12-31 C000524 ferc:SalesAndUseTaxMember 2020-12-31 C000524 Senior Notes, Series C, Tranche D, 3.66% , 42079 2021-12-31 C000524 HYATT - OH, Transmission, , 345 , 138 , 13.8 ,  ,  , 2 2021-12-31 C000524 PUCO - Long Term Forecast Fee 2021-12-31 C000524 Julia A.Sloat, Chief Financial Office  and Vice President 2021-01-012021-12-31 C000524 BABBITT - OH, Transmission, , 345 , 138 , 34.5 ,  ,  , 1 2021-12-31 C000524 ScheduleSalesOfElectricityByRateSchedulesAbstract 2021-01-012021-12-31 C000524 TOTAL TRANSMISSION 2021-01-012021-12-31 C000524 0193 NORTH WALDO, SOUTH KENTON, 1, 0.25, 477 KCM ACSR 2021-01-012021-12-31 C000524 VASSELL - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-12-31 C000524 Senior Notes, Series D, 3.10% , 43006 2021-01-012021-12-31 C000524 0072 BIERS RUN, CIRCLEVILLE, 1, 19.2, 1590 KCM ACSR 2021-01-012021-12-31 C000524 , Income Tax, , 2021-01-012021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 2021-12-31 C000524 GAVIN 765KV - OH, Transmission, , 765 ,  ,  ,  , REACTOR , 2021-12-31 C000524 ferc:ElectricUtilityMember Corp Prgrm Billing - AEP OH Tr , 3029042.27 2021-12-31 C000524 0330 Hyatt, Delaware, 2, 4.2, 795 KCM ACSS 2021-01-012021-12-31 C000524 MillbrookP-SPoint Transco CI , 6508349.56ferc:ElectricUtilityMember 2021-12-31 C000524 Property Tax, Property Tax, OH, 2021 2021-12-31 C000524 0150 YAGER, LEESVILLE, 1, 3.59, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0117 DELANO, SCIOTO TRAIL, 2, 9.26, 1926 KCM ACSR 2021-01-012021-12-31 C000524 LEMASTER - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0129 JUG STREET, CORRIDOR, 1, 6.91, (2) 1590 KCM ACSR 2021-01-012021-12-31 C000524 Senior Notes, Series D, 3.10% , 42695 2021-12-31 C000524 Other Taxes and Fees, Other Taxes and Fees, OH, 2021 2021-12-31 C000524 OH-Transco Line Rebuild-OHTC , 29763962.28ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 Property Tax, Property Tax, OH, 2021 2020-12-31 C000524 0377 Culbertson 138kV Extension, , 1, 0.52 2021-01-012021-12-31 C000524 Property Tax, Property Tax, OH, 2019 2020-12-31 C000524 0057 Buckley Road, Fremont Center, 1, 0.6, 795 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Transco Work , 17647512.17 2021-01-012021-12-31 C000524 2020-12-31 C000524 0, 0 2021-01-012021-12-31 C000524 0222 Seaman, Adams, 2, 0.39, 1033 KCM ACSR 2021-01-012021-12-31 C000524 BIXBY - OH, Transmission, , 345 ,  , 34.5 , 1350 ,  , 6 2021-12-31 C000524 Sales and Use Tax, Sales And Use Tax, OH, 2020 2021-01-012021-12-31 C000524 ScheduleAmountsIncludedInIsoOrRtoSettlementAbstract 2021-01-012021-12-31 C000524 Corporate Human Resources, AEPSC 2021-01-012021-12-31 C000524 0028 VASSELL EXT EAST, , 1, 0.5, 954 KCM ACSR 2021-01-012021-12-31 C000524 0153 SPARROW, CORNERSTONE PIPELINE, 1, 0.08, 1590 KCM ACSR 2021-01-012021-12-31 C000524 8012 POSTON, ROSS, 1, 43.06, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0193 NORTH WALDO, SOUTH KENTON, 2, 0.14, 477 KCM ACSR 2021-01-012021-12-31 C000524 0162 MACKSBURG, ARENDS RIDGE SW, 2, 1.92, 1033 KCM ACSR 2021-01-012021-12-31 C000524 GAVIN 138KV - OH, Transmission, , 138 , 70.5 , 13.09 , 130 ,  , 1 2021-01-012021-12-31 C000524 Administrative & General - Maintenance, OPCo 2021-01-012021-12-31 C000524 Ohio Transco work , 2167515.29ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0246 HEPPNER, RHODES, 1, 0.63, 1033 KCM ACSR 2021-01-012021-12-31 C000524 HERLAN SWITCH - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Senior Notes, Series B, Tranche B, 4.05% , 41585 2021-01-012021-12-31 C000524 Senior Notes, Series A, Tranche C, 4.73% , 41200 2021-01-012021-12-31 C000524 0209 SOUTH KENTON, WESTMINSTER, 2, 3.73, 636 KCM ACSR 2021-01-012021-12-31 C000524 0223 ADAMS, WAVERLY, 2, 24.8, 1033 KCM ACSR 2021-01-012021-12-31 C000524 OH Transco Work , 3639086.46ferc:ElectricUtilityMember 2021-12-31 C000524 Property Tax, Property Tax, OH, 2019ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche C, 3.56% , 41957 2021-12-31 C000524 ferc:ElectricUtilityMember Transco Work , 5321192.15 2021-12-31 C000524 MARYSVILLE - OH, Transmission, , 765 ,  ,  ,  , REACTOR , 2021-01-012021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 2021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Work , 8195739.99 2021-01-012021-12-31 C000524 391 2021-01-012021-12-31 C000524 Ohio Transco work , 11106542.27ferc:ElectricUtilityMember 2021-12-31 C000524 0053 KIRK, JUG STREET, 1, 12.18, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 Fuel & Storeroom Services, AEPSC 2021-01-012021-12-31 C000524 0090 MUSKINGUM RIVER, GLOBE METAL, 1, 0.3, 397 KCM ACSR 2021-01-012021-12-31 C000524 Crooksville-N.Newark Transco , 1172586.26 2021-01-012021-12-31 C000524 Notes Payable to Associated Companies - Issued 2021-01-012021-12-31 C000524 0, 0 2021-12-31 C000524 0095 OHIO CENTRAL LOOP, , 1, 0.71, 556 KCM ACSR 2021-01-012021-12-31 C000524 0247 HEPPNER, LICK, 1, 3.1, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0347 Babbitt EXT No. 1, , 1, 0.31, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 Other (provide details in footnote): 2021-01-012021-12-31 C000524 ELLIOTT - OH, Transmission, , 138 , 70.5 , 13.09 , 78 ,  , 1 2021-01-012021-12-31 C000524 Senior Notes, Series K, 3.80% , 744220 2021-01-012021-12-31 C000524 0042 GLENCOE, SPEIDEL, 1, 12.52, 1233 KCM ACSS 2021-01-012021-12-31 C000524 Ohio Transco work , 5324843.7ferc:ElectricUtilityMember 2021-12-31 C000524 , Local Tax, OH, 2017 2020-12-31 C000524 , Local Tax, OH, 2019 2021-01-012021-12-31 C000524 0108 MUSKINGUM RIVER, WOLF CREEK, 1, 4.35, 1233 KCM ACSR 2021-01-012021-12-31 C000524 ferc:IntangiblePlantMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 HANGING ROCK 765KV - OH, Transmission, , 765 ,  ,  ,  , REACTOR ,  , 1 2021-01-012021-12-31 C000524 WEST END FOSTORIA - OH, Transmission, , 138 , 70.5 , 13.09 , 90 ,  , 1 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 7040639.98 2021-01-012021-12-31 C000524 State Commission Fees 2021-12-31 C000524 0006 TRENT, VASSELL, 1, 3.05, 1590 KCM ACSR 2021-01-012021-12-31 C000524 PJM  FNO 2021-01-012021-12-31 C000524 , Income Tax, ,ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0175 POSTON, GOOD HOPE SW, 1, 3.2, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Senior Notes, Series H, 3.75% , 43006 2021-01-012021-12-31 C000524 NOL-Deferred Tax Assetferc:ElectricUtilityMember 2020-12-31 C000524 ferc:ElectricUtilityMember 2021-12-31 C000524 Excess ADIT- Unprotectedferc:ElectricUtilityMember 2020-12-31 C000524 LEMASTER - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 0024 COLE 138KV EXT, , 1, 1.12, 1590 KCM ACSR 2021-01-012021-12-31 C000524 Other (provide details in footnote): 2021-01-012021-12-31 C000524 0137 CORNER, PARKERSBURG (APS), 2, 6.4, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Treasury & Risk, AEPSC 2021-01-012021-12-31 C000524 Ohio Transco work , 7040639.98 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche I, 4.53% , 41957 2021-12-31 C000524 Ohio Transco work , 1134127.27ferc:ElectricUtilityMember 2021-12-31 C000524 VASSELL - OH, Transmission, , 138 , 35.4 , 13.8 , 30 ,  , 1 2021-12-31 C000524 ferc:ElectricUtilityMember T/OH/Transco Work , 1814912.35 2021-01-012021-12-31 C000524 356.16 , 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche D, 3.66% , 42079 2021-01-012021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 7879797.59 2021-01-012021-12-31 C000524 ScheduleGeneratingPlantStatisticsAbstract 2021-01-012021-12-31 C000524 Long Term Issuances Costs 2021-01-012021-12-31 C000524 OHTCo-Supplemental , 5798030.74ferc:ElectricUtilityMember 2021-12-31 C000524 07-0193 TIFFIN CENTER, FREMONT CENTER, 1, 12.6, 959 KCM ACSR 2021-01-012021-12-31 C000524 OH TCo work , 3701962.31 2021-01-012021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 2021-01-012021-12-31 C000524 DON MARQUIS (OP-CS) (OVEC) - OH, Transmission, , 765 , 345 , 34.5 , 2250 ,  , 3 2021-01-012021-12-31 C000524 0019 ELK EXT NORTH, , 1, 7.03, 1233 KCM ACSR 2021-01-012021-12-31 C000524 S3 Filing FeesAmortized through April 2024 2021-01-012021-12-31 C000524 , Federal Tax, , 2021-12-31 C000524 ferc:OtherUtilityMember 2021-01-012021-12-31 C000524 Ohio Transco work , 1134127.27 2021-01-012021-12-31 C000524 0086 HYATT TIE LINE SOUTH, , 1, 0.68, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 Increases (Decreases) in Other Paid-In Capital 2021-01-012021-12-31 C000524 T/OHTC/NERC Physical Security , 22016896.02 2021-01-012021-12-31 C000524 Ohio Transco work , 3553267.65 2021-01-012021-12-31 C000524 Corporate Communications, AEPSC 2021-01-012021-12-31 C000524 TRABUE - OH, Distribution, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 0186 GLENCOE, WEST BELLAIRE, 4, 0.15, 4000 KCM Segmenta 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2020 2021-12-31 C000524 BIERS RUN - OH, Transmission, , 138 , 69 , 12 ,  ,  , 1 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche C, 3.56% , 41957 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo Baseline , 5417020.9 2021-01-012021-12-31 C000524 0222 Seaman, Adams, 1, 0.26, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0141 SWITZER EXT NORTH, , 1, 0.06, 556 KCM ACSR 2021-01-012021-12-31 C000524 ferc:OtherStateTaxMember 2021-12-31 C000524 0347 Babbitt 138kV Extension No. 1, , 1, 0.311 2021-01-012021-12-31 C000524 0132 NOTTINGHAM, FREEBRYD, 3, 4.43, 1033 KCM ACSR 2021-01-012021-12-31 C000524 BIXBY - OH, Transmission, , 345 , 138 ,  , 1350 ,  , 6 2021-01-012021-12-31 C000524 MUSKINGUM RIVER 345KV - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 2 2021-01-012021-12-31 C000524 OH Transco , 15337956.19 2021-01-012021-12-31 C000524 OH Transco Work , 22748354.13 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Baseline Ohio Transco Work , 8178615.37 2021-12-31 C000524 DeCliff_LaRue Transco CI , 12367699.73ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0827 Philo, Howard, 1, 0.17 2021-01-012021-12-31 C000524 Notes Receivable from Associated Companies 2021-01-012021-12-31 C000524 Senior Notes, Series B, Tranche C, 4.38% , 41585 2021-12-31 C000524 Other State Tax, Other State Tax, OH, 2021 2021-12-31 C000524 0066 WAGENHALS, WEST CANTON, 3, 7.6, 565 KCM ACSS 2021-01-012021-12-31 C000524 Lick Rebuild - Transco CI , 2253202.95 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo Work , 19786302.97 2021-12-31 C000524 ferc:ElectricUtilityMemberferc:IncomeTaxMember 2021-01-012021-12-31 C000524 ScheduleAccumulatedDeferredIncomeTaxesAcceleratedAmortizationPropertyAbstract 2021-01-012021-12-31 C000524 Long Term Issuances Costs 2020-01-012020-12-31 C000524 0220 HAYDEN, HYATT, 3, 9.41, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 0053 KIRK, JUG STREET, 1, 0.51, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 SchedulePurchasedPowerAbstract 2021-01-012021-12-31 C000524 SFAS 109 2021-12-31 C000524 ferc:ElectricUtilityMember Property Tax, Property Tax, OH, 2020 2021-01-012021-12-31 C000524 Ohio Transco work , 5324843.7ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 Amortization of 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2021 2020-12-31 C000524 NOL-Deferred Tax Assetferc:ElectricUtilityMember 2021-12-31 C000524 Other Accounts (Specify, details in footnote): 2021-01-012021-12-31 C000524 Senior Notes, Series N, 2.75% , 44412 2021-12-31 C000524 ferc:OtherUtilityOrNonutilityMember 0 2021-01-012021-12-31 C000524 TOTAL GENERAL PLANT 2021-01-012021-12-31 C000524 ferc:IncomeTaxMember 2021-12-31 C000524 OH Transco Work , 4449281.48ferc:ElectricUtilityMember 2021-12-31 C000524 355 , 2021-01-012021-12-31 C000524 NERC Penalty 2021-01-012021-12-31 C000524 Miscellaneous Expenses 2021-01-012021-12-31 C000524 Unamortized Credit Line FeesAmortized through March 2026 2021-01-012021-12-31 C000524 0183 LAMPING, ROUSE (WEC), 1, 5.04, 795 KCM ACSR 2021-01-012021-12-31 C000524 Increases (Decreases) Due to Reductions in Par or Stated Value of Capital Stock 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco , 5359340.99 2021-12-31 C000524 Senior Notes, Series C, Tranche B, 3.18% , 41957 2021-01-012021-12-31 C000524 OH Transco , 5359340.99 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Work , 8195739.99 2021-12-31 C000524 YAGER - OH, Transmission, , 138 , 69 , 36.2 , 120 ,  , 1 2021-12-31 C000524 8096 POSTON, WEST LANCASTER, 2, 15.66, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0162 MACKSBURG, ARENDS RIDGE SW, 1, 8.13, 1033 KCM ACSR 2021-01-012021-12-31 C000524 SWITZER - OH, Transmission, , 138 , 69 , 34.5 , 50 ,  , 1 2021-12-31 C000524 ferc:ElectricUtilityMember OH-Transco Work , 9408482.87 2021-12-31 C000524 ferc:LocalTaxMember 2020-12-31 C000524 8044 TRENT, DELAWARE, 1, 0.72, 1272 KCM ACSR 2021-01-012021-12-31 C000524 T/OHTC/NERC Physical Security , 22016896.02ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 , Local Tax, OH, 2021 2021-01-012021-12-31 C000524 VASSELL - OH, Transmission, , 765 , 345 , 34.5 , 2250 ,  , 3 2021-12-31 C000524 0295 Isabella Extension, So, , 1, 0.19, 795 KCM ACSR 2021-01-012021-12-31 C000524 0290 GEMINI, GRISTMILL, 2, 0.18, 795 KCM ACSR 2021-01-012021-12-31 C000524 0209 SOUTH KENTON, WESTMINSTER, 2, 3.35, 477 KCM ACSR 2021-01-012021-12-31 C000524 NORTHEAST CANTON - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0282 BRICE EXTENSION, , 1, 0.58, 795 KCM ACSR 2021-01-012021-12-31 C000524 Deferred Property Taxes 2021-12-31 C000524 0121 BOLTON EXTENSION, , 1, 0.15, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Civil & Political Activities and other Svcs, AEPSC 2021-01-012021-12-31 C000524 CONTINENTAL - OH, Distribution, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0 2021-01-012021-12-31 C000524 Property Tax, Property Tax, OH, 2019 2021-01-012021-12-31 C000524 TRABUE - OH, Distribution, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0359 Marysville, Peoria, 1, 0.17, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 SAINT CLAIR AVENUE (CS) - OH, Distribution, , 138 , 11.5 ,  , 300 ,  , 2 2021-12-31 C000524 BERRYWOOD - OH, Transmission, , 138 , 70.5 , 13.09 , 78 ,  , 1 2021-01-012021-12-31 C000524 Unamortized Credit Line FeesAmortized through March 2026 2020-12-31 C000524 T/OH Trans/Transco Wrk , 18414832.82 2021-01-012021-12-31 C000524 ferc:ElectricOtherFacilitiesMember Other (provide details in footnote): 2021-01-012021-12-31 C000524 Real Estate & Workplace Svcs, AEPSC 2021-01-012021-12-31 C000524 T/OH/Transco Work , 2774291.96 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember T/OH/Transco Work , 1814912.35 2021-12-31 C000524 Ohio Transco work , 11106542.27ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:Quarter1Member 0 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche E, 3.76% , 42170 2021-01-012021-12-31 C000524 GAVIN 138KV - OH, Transmission, , 138 , 70.5 , 13.09 , 130 ,  , 1 2021-12-31 C000524 0123 PANDA EXTENSION, , 1, 0.28, 1033 KCM ACSR 2021-01-012021-12-31 C000524 OH Transco Work , 8195739.99 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Alpine - Trail Transco , 2911541.47 2021-12-31 C000524 0188 GEORGE WASHINGTON, DILLES BOTTOM, 3, 0.15, 1233 KCM ACSS 2021-01-012021-12-31 C000524 0827 Philo, Howard, 1, 0.17, 556 KCM ACSR 2021-01-012021-12-31 C000524 ScheduleNuclearFuelMaterialsAbstract 2021-01-012021-12-31 C000524 BERRYWOOD - OH, Transmission, , 138 , 70.5 , 13.09 , 78 ,  , 1 2021-12-31 C000524 CANTON CENTRAL - OH, Transmission, , 345 , 138 , 13.8 , 900 ,  , 2 2021-12-31 C000524 TIDD 345KV - OH, Transmission, , 345 , 137.5 , 13.8 , 270 ,  , 1 2021-01-012021-12-31 C000524 0296 BETHEL, SAWMILL, 1, 2.2, 1590 KCM ACSR 2021-01-012021-12-31 C000524 FERC 205 Filing 2021-01-012021-12-31 C000524 0247 HEPPNER, LICK, 2, 0.11, 1033 KCM ACSR 2021-01-012021-12-31 C000524 DSIT Entry-Normalizedferc:ElectricUtilityMember 2020-12-31 C000524 ScheduleUnrecoveredPlantAndRegulatoryStudyCostsAbstract 2021-01-012021-12-31 C000524 0343 Babbitt Bus Tie No. 1, , 1, 0.13, (2) 1033 KCM ACSS 2021-01-012021-12-31 C000524 Senior Notes, Series J, 4.25% , 20700 2021-01-012021-12-31 C000524 OH TCo work , 3701962.31ferc:ElectricUtilityMember 2021-12-31 C000524 ferc:ElectricUtilityMemberferc:ElectricPlantInServiceMember 2020-12-31 C000524 Excess ADIT- Unprotectedferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Zanesville Area TTMP TC380 CI , 1133409.9 2021-12-31 C000524 KILLBUCK - OH, Distribution, , 34.5 ,  ,  , 0 , STATCAP , 2021-12-31 C000524 CLOUSE - OH, Distribution, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 2021-12-31 C000524 State Commission Fees 2021-01-012021-12-31 C000524 7% 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember T/OHTR/TransCo Line Rebuild , 30033466.74 2021-01-012021-12-31 C000524 0112 AZALEA EXT EAST, , 1, 0.94, 959 KCM ACSS 2021-01-012021-12-31 C000524 OH Transco Work , 3639086.46 2021-01-012021-12-31 C000524 OH Transco Work , 1333807.21 2021-01-012021-12-31 C000524 Bus Ops & Perf Assurance, AEPSC 2021-01-012021-12-31 C000524 Excess ADIT- Unprotectedferc:ElectricUtilityMember 2021-12-31 C000524 0214 MILES AVE EXT NORTH, , 1, 0.05, 795 KCM ACSR 2021-01-012021-12-31 C000524 LAMPING - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 1 2021-01-012021-12-31 C000524 ADAMS (CSP) - OH, Transmission, , 138 , 69 , 13 , 60 ,  , 4 2021-12-31 C000524 Billings and Deferred Projects 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember DSIT Entry Normalized 2021-01-012021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-01-012021-12-31 C000524 NORTHEAST CANTON - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 YAGER - OH, Transmission, , 138 , 69 , 36.2 , 120 ,  , 1 2021-01-012021-12-31 C000524 0145 BRITTON, DAVIDSON, 1, 0.87, 1033 KCM ACSR 2021-01-012021-12-31 C000524 GAVIN 765KV - OH, Transmission, , 765 ,  ,  ,  , REACTOR , 2021-01-012021-12-31 C000524 352 , 2021-01-012021-12-31 C000524 , Local Tax, OH, 2020 2021-01-012021-12-31 C000524 354 , 2021-01-012021-12-31 C000524 NORTH PORTSMOUTH - OH, Transmission, , 138 , 70.5 , 13.09 , 432 ,  , 8 2021-01-012021-12-31 C000524 WEST END FOSTORIA - OH, Transmission, , 138 , 70.5 , 13.09 , 90 ,  , 1 2021-12-31 C000524 OH TRANSCo Pre Eng Parent , 16845960.82 2021-01-012021-12-31 C000524 T/OH Trans/Transco Wrk , 18414832.82ferc:ElectricUtilityMember 2021-12-31 C000524 PUCO - Long Term Forecast Fee 2021-01-012021-12-31 C000524 356 , 2021-01-012021-12-31 C000524 ferc:Quarter3Member 0 2021-01-012021-12-31 C000524 MILLER SW - TRANSCO - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Other (provide details in footnote): 2020-01-012020-12-31 C000524 397 2021-01-012021-12-31 C000524 CLOUSE - OH, Distribution, , 138 , 69 , 13.09 , 130 ,  , 1 2021-12-31 C000524 TIDD 345KV - OH, Transmission, , 138 ,  ,  ,  , AIR CORE REACTOR , 2021-12-31 C000524 Senior Notes, Series A, Tranche B, 4.00% 2021-12-31 C000524 Strategy & Transformation, AEPSC 2021-01-012021-12-31 C000524 Note: Respondent does not have an Executive Committee 2021-01-012021-12-31 C000524 ferc:OtherStateTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 OH Transco , 15337956.19ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 SAINT CLAIR AVENUE (CS) - OH, Distribution, , 138 , 11.5 ,  , 300 ,  , 2 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Crooksville-N.Newark Transco , 1172586.26 2021-12-31 C000524 ScheduleTransmissionOfElectricityByIsoOrRtoAbstract 2021-01-012021-12-31 C000524 0132 NOTTINGHAM, FREEBRYD, 1, 0.44, 1033 KCM ACSR 2021-01-012021-12-31 C000524 DeCliff_LaRue Transco CI , 12367699.73 2021-01-012021-12-31 C000524 0189 DILLES BOTTOM, FE CORRIDOR, 1, 0.22, 1233 KCM ACSS/TW 2021-01-012021-12-31 C000524 HARRISON - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-12-31 C000524 EBERSOLE - OH, Transmission, , 138 , 70.5 , 36.2 , 90 ,  , 1 2021-12-31 C000524 A (6)g: Other, 1 items under $50,000 2021-01-012021-12-31 C000524 0119 HOLLOWAY BUS TIE, , 1, 0.27, 1926 KCM ACSR 2021-01-012021-12-31 C000524 WEST CAMBRIDGE - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-01-012021-12-31 C000524 CANTON CENTRAL - OH, Transmission, , 345 , 138 , 13.8 , 900 ,  , 2 2021-01-012021-12-31 C000524 0043 BARNESVILLE, SUMMERFIELD, 1, 15.88, 1233 KCM ACSS 2021-01-012021-12-31 C000524 0245 ROSS, HEPPNER, 1, 0.2, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0246 HEPPNER, RHODES, 2, 3.78, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:IncomeTaxMember 2020-12-31 C000524 0211 CLOUSE EXTENSION, EAST, 1, 0.19, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:LocalTaxMember 2021-12-31 C000524 OH TRANSCo Pre Eng Parent , 16845960.82ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 , Local Tax, OH, 2019 2020-12-31 C000524 OHTCo-Supplemental , 5798030.74 2021-01-012021-12-31 C000524 BIXBY - OH, Transmission, , 345 ,  ,  , 675 ,  , 3 2021-12-31 C000524 0020 PHILLIPI EXT, , 1, 0.23, 795 KCM ACSR 2021-01-012021-12-31 C000524 Scott P.Moore, Vice President 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Net Operating Loss and Tax Credit Carryforwards 2020-12-31 C000524 ferc:ElectricUtilityMember 2020-01-012020-12-31 C000524 0254 BLUE RACER, TEXAS EASTERN BERNE, 1, 0.19, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Transmission Expenses - Maintenance, AEPSC 2021-01-012021-12-31 C000524 Construction Services, OPCO 2021-01-012021-12-31 C000524 T/OHTR/TransCo Line Rebuild , 30033466.74 2021-01-012021-12-31 C000524 0357 CONESVILLE, BIXBY, 2, 0.58, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 Administrative and General Expenses - Maintenance, AEPSC 2021-01-012021-12-31 C000524 STERLING - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Senior Notes, Series D, 3.10% , 2021-01-012021-12-31 C000524 AZALEA SW STATION - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 STERLING - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 OH Transco Work , 1333807.21ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 BIERS RUN - OH, Transmission, , 138 , 69 , 12 ,  ,  , 1 2021-12-31 C000524 10%ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0057 BUCKLEY ROAD, FREMONT CENTER, 1, 15.81, 795 KCM ACSR 2021-01-012021-12-31 C000524 Ohio Transco work , 7879797.59 2021-01-012021-12-31 C000524 Transco Work CI , 15548009.57 2021-01-012021-12-31 C000524 0316 ANGUIN, BABBITT, 1, 1.69, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember T/OHTR/TransCo Line Rebuild , 30033466.74 2021-12-31 C000524 Wade A. Smith, Vice President 2021-01-012021-12-31 C000524 Ohio Transco work , 6049338.38 2021-01-012021-12-31 C000524 SOUTHWEST LIMA - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 1 2021-01-012021-12-31 C000524 Ohio Transco work , 2049451.34 2021-01-012021-12-31 C000524 ANGUIN - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 OH Transco Work , 17080564.17 2021-01-012021-12-31 C000524 Excess ADIT- Unprotected 2021-01-012021-12-31 C000524 T/OH/Transco Work , 1814912.35 2021-01-012021-12-31 C000524 DSIT Entry-Normalizedferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0039 GAHANNA, 138KV LOOP, 1, 1.22, 1590 KCM ACSR 2021-01-012021-12-31 C000524 0092 MUSKINGUM RIVER, MUSKINGUM RIVER TIE, 1, 0.21, 1926 KCM ACSS 2021-01-012021-12-31 C000524 PJM Formula Rate Filing 2021-12-31 C000524 Adoption of ASC 326 2020-01-012020-12-31 C000524 BIERS RUN - OH, Transmission, , 345 , 138 , 34 , 675 ,  , 1 2021-01-012021-12-31 C000524 390 2021-01-012021-12-31 C000524 ferc:TransmissionSubstationMember 2021-12-31 C000524 SEAMAN - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 ScheduleInvestmentsInSubsidiaryCompaniesAbstract 2021-01-012021-12-31 C000524 DEPRECIABLE SUM 2021-01-012021-12-31 C000524 0176 GOOD HOPE SW, HARRISON, 2, 28.45, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Provision for Revenue Refund 2021-01-012021-12-31 C000524 , Local Tax, OH, 2017 2021-01-012021-12-31 C000524 0179 FIREBRICK EXT - EAST, , 1, 0.79, 1590 KCM ACSR 2021-01-012021-12-31 C000524 Ohio TansCo Work , 4807967ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:OtherElectricUtilityMember 2021-12-31 C000524 0139 SWITZER EXT SOUTH, , 1, 0.04, 556 KCM ACSR 2021-01-012021-12-31 C000524 ferc:OtherUtilityMember 2020-12-31 C000524 0239 LAMPING EXT EAST, , 1, 0.19, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 0296 BETHEL, SAWMILL, 1, 3, 1590 KCM ACSR 2021-01-012021-12-31 C000524 FOSTORIA CENTRAL - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 2021-12-31 C000524 RHODES - OH, Transmission, , 138 , 69 , 13.09 , 720 ,  , 8 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Work , 22748354.13 2021-01-012021-12-31 C000524 Senior Notes, Series A, Tranche C, 4.73% , 41200 2021-12-31 C000524 ferc:ElectricUtilityMember Transco Work , 5321192.15 2021-01-012021-12-31 C000524 0164 FREEBYRD, SOUTH CADIZ, 2, 1.4, 1033 KCM ACSR 2021-01-012021-12-31 C000524 HYATT - OH, Transmission, , 345 , 138 , 13.8 ,  ,  , 2 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Baseline Ohio Transco Work , 8178615.37 2021-01-012021-12-31 C000524 0138 BELPRE LOOP, , 1, 0.47, 1033 KCM ACSR 2021-01-012021-12-31 C000524 CORRIDOR - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-12-31 C000524 TIDD 345KV - OH, Transmission, , 138 ,  ,  ,  , AIR CORE REACTOR , 2021-01-012021-12-31 C000524 ferc:FederalTaxMember 2021-01-012021-12-31 C000524 ferc:PropertyTaxMember 2020-12-31 C000524 0100 NEW MARKET, SOUTH CENTRAL POWER, 1, 0.18, 795 KCM ACSR 2021-01-012021-12-31 C000524 VASSELL - OH, Transmission, , 765 , 345 , 34.5 , 2250 ,  , 3 2021-01-012021-12-31 C000524 10% 2021-01-012021-12-31 C000524 Senior Notes, Series B, Tranche E, 5.42% , 41759 2021-12-31 C000524 ROSS - OH, Transmission, , 138 , 69 , 13.09 , 54 ,  , 1 2021-12-31 C000524 0192 WEST MOUNT VERNON, NORTH WALDO, 2, 29.73, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Ohio TansCo Work , 4807967 2021-01-012021-12-31 C000524 , Local Tax, OH, 2020 2020-12-31 C000524 ScheduleCommonUtilityPlantAndExpensesAbstract 2021-01-012021-12-31 C000524 Bluffton Transco CI , 1173370.3ferc:ElectricUtilityMember 2021-12-31 C000524 Increases (Decreases) from Gain or Resale or Cancellation of Reacquired Capital Stock 2021-01-012021-12-31 C000524 HANGING ROCK 765KV - OH, Transmission, , 765 ,  ,  ,  , REACTOR ,  , 1 2021-12-31 C000524 Property Tax, Property Tax, OH, 2020 2021-12-31 C000524 Senior Notes, Series H, 3.75% , 43006 2021-12-31 C000524 Senior Notes, Series H, 3.75% , 453080 2021-01-012021-12-31 C000524 0114 HARRISON, CIRCLEVILLE, 1, 15.2, 1233 KCM ACSR 2021-01-012021-12-31 C000524 358.16 , 2021-01-012021-12-31 C000524 Not Applicable 2021-01-012021-12-31 C000524 0031 VASSELL LOOP WEST, , 1, 0.41, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo Work , 19786302.97 2021-01-012021-12-31 C000524 Senior Notes, Series D, 3.10% , 43006 2021-12-31 C000524 Toby L.Thomas , President and Chief Operating Officer 2021-01-012021-12-31 C000524 NORTH PROCTORVILLE - OH, Transmission, , 765 , 138 , 13.8 , 1000 ,  , 4 2021-01-012021-12-31 C000524 0115 SCIOTO TRAIL, CIRCLEVILLE, 1, 2.54, 1590 KCM ACSR 2021-01-012021-12-31 C000524 MILLER SW - TRANSCO - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Nicholas K. Akins, Chairman of the Board, and Chief Executive Officer 2021-01-012021-12-31 C000524 GLENCOE SW - OH, Transmission, , 138 , 69 , 13.09 , 130 ,  , 1 2021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 2021-01-012021-12-31 C000524 Other (provide details in footnote): 2021-01-012021-12-31 C000524 GRISTMILL - OH, Transmission, , 345 , 138 , 13.8 ,  ,  , 1 2021-01-012021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 7040639.98 2021-12-31 C000524 Net Operating Loss and Tax Credit Carryforwards 2021-01-012021-12-31 C000524 0343 Babbitt Bus Tie No. 1, , 1, 0.127 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember 3% 2021-01-012021-12-31 C000524 KIRK - OH, Transmission, , 345 , 138 , 34.5 ,  ,  , 1 2021-01-012021-12-31 C000524 0174 REXFORD EXT, , 1, 0.05, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0307 Reno Extension, , 1, 0.02, 954 KCM ACSR 2021-01-012021-12-31 C000524 0212 CLOUSE EXTENSION, WEST, 1, 0.19, 1033 KCM ACSR 2021-01-012021-12-31 C000524 OH Transco , 15337956.19ferc:ElectricUtilityMember 2021-12-31 C000524 8008 GROVES ROAD, BEXLEY, 1, 4.35, 1926 KCM ACSR 2021-01-012021-12-31 C000524 MUSKINGUM RIVER 345KV - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 2 2021-12-31 C000524 0365 WATERFORD EXT, , 3, 0.98, 959 KCM ACSS 2021-01-012021-12-31 C000524 Allowances Usedferc:SulfurDioxideMember 2021-01-012021-12-31 C000524 Sales and Use Tax, Sales And Use Tax, OH, 2020 2020-12-31 C000524 BIXBY - OH, Transmission, , 345 , 138 ,  , 1350 ,  , 6 2021-12-31 C000524 Other Taxes and Fees, Other Taxes and Fees, OH, 2021 2021-01-012021-12-31 C000524 8011 WEST LANCASTER, BIXBY, 1, 19.1, 1033 KCM ACSR 2021-01-012021-12-31 C000524 NORTH PORTSMOUTH - OH, Transmission, , 138 , 70.5 , 13.09 , 432 ,  , 8 2021-12-31 C000524 Senior Notes, Series C, Tranche H, 4.05% , 41957 2021-12-31 C000524 ferc:FederalTaxMember 2020-12-31 C000524 , Local Tax, OH, 2021 2020-12-31 C000524 Other Debit or Cr. Items (Describe, details in footnote): 2021-01-012021-12-31 C000524 MillbrookP-SPoint Transco CI , 6508349.56ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 BOUTWELL - OH, Transmission, , 138 , 70.5 , 36.2 , 54 ,  , 1 2021-12-31 C000524 SEAMAN - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 EAST WILLARD - OH, Distribution, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Senior Notes, Series A, Tranche B, 4.00% 2021-01-012021-12-31 C000524 OH Transco Glencoe-Somerton , 14532884.36 2021-01-012021-12-31 C000524 Insurance Receivable 2021-01-012021-12-31 C000524 Salerno 138kV Sta Install 380 , 1121857.69 2021-01-012021-12-31 C000524 0149 YAGER, AZALEA, 2, 4.25, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0222 Seaman, Adams, 1, 7.57 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Accrued Companywide Incentive Compensation 2020-12-31 C000524 SOUTHWEST LIMA - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 1 2021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 2049451.34 2021-12-31 C000524 ferc:ElectricUtilityMember Zanesville Area TTMP TC380 CI , 1133409.9 2021-01-012021-12-31 C000524 0344 Babbitt Bus Tie No. 2, , 1, 0.234 2021-01-012021-12-31 C000524 MARYSVILLE - OH, Transmission, , 765 , 345 , 34.5 , 2250 ,  , 3 2021-01-012021-12-31 C000524 0047 SPORN, MUSKINGUM, 3, 39.34, (2) 959 KCM ACS 2021-01-012021-12-31 C000524 NOL-Deferred Tax Assetferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0103 BIERS RUN, DELANO, 1, 10, 1590 KCM ACSR 2021-01-012021-12-31 C000524 Baseline Ohio Transco Work , 8178615.37 2021-01-012021-12-31 C000524 ScheduleCorporationsControlledByRespondentAbstract 2021-01-012021-12-31 C000524 0288 AULT SWITCH, GINGER, 2, 0.06, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember DSIT Entry Normalized 2021-12-31 C000524 CLOUSE - OH, Distribution, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Corporate Memberships 2021-01-012021-12-31 C000524 ferc:FederalTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 C797 ROBERTS, OSU, 4, 5.55, 2500 MCM XLPE 2021-01-012021-12-31 C000524 ferc:LocalTaxMember 2021-01-012021-12-31 C000524 0330 Hyatt, Delaware, 2, 4.2 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Glencoe-Somerton , 14532884.36 2021-01-012021-12-31 C000524 Other Deferred Credits 2021-01-012021-12-31 C000524 HARRISON - OH, Transmission, , 69 ,  ,  ,  , REACTIVE SPECIAL , 2021-01-012021-12-31 C000524 WOLF CREEK (CSP) - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-12-31 C000524 NORTH PROCTORVILLE - OH, Transmission, , 765 , 138 , 13.8 , 1000 ,  , 4 2021-12-31 C000524 ferc:ElectricUtilityMemberferc:ElectricPlantInServiceMember 2021-12-31 C000524 Ohio Transco work , 3553267.65ferc:ElectricUtilityMember 2021-12-31 C000524 GLENCOE SW - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 2019-12-31 C000524 WOLF CREEK (CSP) - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 COLE (CS) - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-01-012021-12-31 C000524 CARROLLTON - OH, Distribution, , 138 , 70.5 , 36.2 , 130 ,  , 1 2021-12-31 C000524 0287 NEWBERY EXT, , 1, 0.56, 1033 KCM ACSR 2021-01-012021-12-31 C000524 SchedulePumpedStorageGeneratingPlantStatisticsAbstract 2021-01-012021-12-31 C000524 SFAS 109 2020-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-12-31 C000524 0161 Buell Extension, , 1, 2.51, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Transco Work , 5321192.15 2021-01-012021-12-31 C000524 GENERAL PLANT 2021-01-012021-12-31 C000524 0118 ROSS, DELANO, 1, 4.69, 1033 KCM ACSR 2021-01-012021-12-31 C000524 BLUE RACER - OH, Transmission, , 138 , 0 , 0 , 0 , STATCAP , 2021-01-012021-12-31 C000524 NORTHEAST CANTON - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-01-012021-12-31 C000524 ferc:SalesAndUseTaxMember 2021-12-31 C000524 MARYSVILLE - OH, Transmission, , 765 ,  ,  ,  , REACTOR , 2021-12-31 C000524 0202 HERLAN, BLUE RACER, 2, 2.76, 1033 KCM ACSR 2021-01-012021-12-31 C000524 GLENCOE SW - OH, Transmission, , 138 , 69 , 13.09 , 130 ,  , 1 2021-01-012021-12-31 C000524 BIXBY - OH, Transmission, , 345 ,  , 34.5 , 1350 ,  , 6 2021-01-012021-12-31 C000524 0294 Isabella Extension, No, , 1, 0.22, 795 KCM ACSR 2021-01-012021-12-31 C000524 ADOBE SWITCH - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Senior Notes, Series N, 2.75% , 44412 2021-01-012021-12-31 C000524 ScheduleTransmissionOfElectricityByOthersAbstract 2021-01-012021-12-31 C000524 0146 COLE, AMLIN, 1, 0.87, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 0122 HYATT EXTENSION, , 1, 0.35, 954 KCM ACSR 2021-01-012021-12-31 C000524 0183 LAMPING, ROUSE (WEC), 2, 0.33, 795 KCM ACSR 2021-01-012021-12-31 C000524 0030 VASSELL LOOP EAST, , 1, 0.38, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 Sales and Use Tax, Sales And Use Tax, OH, 2021 2020-12-31 C000524 0219 GABLE EXTENSION, , 1, 0.94, 1233 KCM ACSS 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Transco Work , 17647512.17 2021-12-31 C000524 Property Tax, Property Tax, OH, 2019 2021-12-31 C000524 ferc:OperatingUtilityMember 2021-12-31 C000524 OHTC - BlnktProj Under $3M , 20789923.82 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Provision for Revenue Refund 2021-12-31 C000524 NOTTINGHAM SWITCH - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 HIGHLAND (CS) - OH, Distribution, , 138 , 69 , 12 , 90 ,  , 1 2021-01-012021-12-31 C000524 0037 ELK EXT SOUTH, , 1, 10.13, 1233 KCM ACSR 2021-01-012021-12-31 C000524 ScheduleMonthlyIsoOrRtoTransmissionSystemPeakLoadAbstract 2021-01-012021-12-31 C000524 ferc:TransmissionPlantMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:SalesAndUseTaxMember 2021-01-012021-12-31 C000524 Alpine - Trail Transco , 2911541.47 2021-01-012021-12-31 C000524 ferc:NonUtilityMember Other SFAS 109 2020-12-31 C000524 OH TCo work , 3701962.31ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 8026 POSTON, LICK, 2, 17.11, 1233 KCM ACSS 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMemberferc:ElectricPlantInServiceMember 2021-01-012021-12-31 C000524 Senior Notes, Series L, 3.15% , 43719 2021-12-31 C000524 ferc:OtherTaxesAndFeesMember 2021-12-31 C000524 FIREBRICK - OH, Transmission, , 138 , 69 , 13.8 , 54 ,  , 1 2021-01-012021-12-31 C000524 NOTTINGHAM SWITCH - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 0157 YAGER, DESERT ROAD, 1, 6.65, 1033 KCM ACSR 2021-01-012021-12-31 C000524 357 , 2021-01-012021-12-31 C000524 Notes Payable to Associated Companies 2021-01-012021-12-31 C000524 0038 HILLSBORO, HIGHLAND, 2, 4.25, 1033 KCM ACSR 2021-01-012021-12-31 C000524 BIERS RUN - OH, Transmission, , 345 , 138 , 34 , 675 ,  , 1 2021-12-31 C000524 Deferred Property Taxes 2021-01-012021-12-31 C000524 BOUTWELL - OH, Transmission, , 138 , 70.5 , 36.2 , 54 ,  , 1 2021-01-012021-12-31 C000524 Other Taxes and Fees, Other Taxes and Fees, OH, 2021 2020-12-31 C000524 MP-FF Transco Baseline , 1379939.86ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 393 2021-01-012021-12-31 C000524 B(1): Research Support, 9 items under $50,000 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Transmission Work , 1333177.21 2021-01-012021-12-31 C000524 NORTHEAST CANTON - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-12-31 C000524 0175 POSTON, GOOD HOPE SW, 2, 21.9, 1033 KCM ACSR 2021-01-012021-12-31 C000524 SFAS 109 Deferred FIT 2020-12-31 C000524 Ohio Transco work , 5324843.7 2021-01-012021-12-31 C000524 Bluffton Transco CI , 1173370.3 2021-01-012021-12-31 C000524 SPARROW SWITCH - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Sales and Use Tax, Sales And Use Tax, OH, 2021 2021-01-012021-12-31 C000524 DSIT Entry Normalized 2021-01-012021-12-31 C000524 0135 SOUTH CALDWELL, SOUTH OLIVE SW, 1, 4.84, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Tax Services, AEPSC 2021-01-012021-12-31 C000524 ROSS - OH, Transmission, , 138 , 69 , 13.09 , 54 ,  , 1 2021-01-012021-12-31 C000524 0133 Bell Ridge Sw, Rouse Sw, 2, 8.896 2021-01-012021-12-31 C000524 Other Deferred Credits 2021-12-31 C000524 SOUTHEAST CANTON - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 2049451.34 2021-01-012021-12-31 C000524 Construction Services, AEPSC 2021-01-012021-12-31 C000524 MARYSVILLE - OH, Transmission, , 765 , 345 , 34.5 , 2250 ,  , 3 2021-12-31 C000524 0176 GOOD HOPE SW, HARRISON, 1, 1.55, 1033 KCM ACSR 2021-01-012021-12-31 C000524 COLE (CS) - OH, Transmission, , 138 , 70.5 , 36.2 , 54 ,  , 1 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember SS-CI-OH-Transco GEN PLT , 1496428.98 2021-01-012021-12-31 C000524 ferc:NonUtilityMember Other SFAS 109 2021-12-31 C000524 Senior Notes, Series C, Tranche F, 3.81% , 41957 2021-01-012021-12-31 C000524 , Local Tax, OH, 2021 2021-12-31 C000524 0236 LAMPING BUS TIE, , 1, 0.17, (2) 795 KCM ACSR 2021-01-012021-12-31 C000524 Billings and Deferred Projects 2020-12-31 C000524 0245 Ross, Heppner, 2, 7.11, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0153 SPARROW, CORNERSTONE PIPELINE, 1, 0.73, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Accrued Companywide Incentive Compensation 2021-01-012021-12-31 C000524 Senior Notes, Series B, Tranche E, 5.42% , 41759 2021-01-012021-12-31 C000524 GLENCOE SW - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Ohio Transco work , 1134127.27ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 Minor Items <$25,000 2021-01-012021-12-31 C000524 OH-Transco Work , 9408482.87 2021-01-012021-12-31 C000524 SS-CI-OH-Transco GEN PLT , 1496428.98 2021-01-012021-12-31 C000524 8096 POSTON, WEST LANCASTER, 1, 19.46, 1033 KCM ACSR 2021-01-012021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 2021-01-012021-12-31 C000524 JUNE ROAD - OH, Transmission, , 138 , 69 , 13.09 , 360 ,  , 4 2021-12-31 C000524 0156 DENNISON, YAGER, 1, 2.21, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Supplemental Ohio TransCo Work , 7501456.61 2021-01-012021-12-31 C000524 0117 DELANO, SCIOTO TRAIL, 1, 3.04, 1926 KCM ACSR 2021-01-012021-12-31 C000524 2021-01-012021-12-31 C000524 HARRISON - OH, Transmission, , 138 , 70.5 , 13.09 , 54 ,  , 1 2021-01-012021-12-31 C000524 S3 Filing FeesAmortized through April 2024 2020-12-31 C000524 Senior Notes, Series E, 4.00% , 2426970 2021-01-012021-12-31 C000524 COLE (CS) - OH, Transmission, , 138 , 13.8 ,  , 50 ,  , 1 2021-01-012021-12-31 C000524 CIRCLEVILLE - OH, Transmission, , 138 ,  ,  , 0 , STATCAP , 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMemberferc:PropertyTaxMember 2021-01-012021-12-31 C000524 0133 Bell Ridge Sw, Rouse Sw, 1, 3.634 2021-01-012021-12-31 C000524 Unamortized Credit Line FeesAmortized through March 2026 2021-12-31 C000524 Sales and Use Tax, Sales And Use Tax, OH, 2021 2021-12-31 C000524 BIERS RUN - OH, Transmission, ,  ,  ,  , 0 , STATCAP , 2021-12-31 C000524 Minor Items <$25,000 2021-12-31 C000524 Ohio Transco work , 2167515.29ferc:ElectricUtilityMember 2021-12-31 C000524 Senior Notes, Series C, Tranche H, 4.05% , 41957 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2021 2021-01-012021-12-31 C000524 ScheduleElectricEnergyAccountAbstract 2021-01-012021-12-31 C000524 S3 Filing FeesAmortized through April 2024 2021-12-31 C000524 0157 YAGER, DESERT ROAD, 1, 0.12, 1033 KCM ACSR 2021-01-012021-12-31 C000524 TIDD 345KV - OH, Transmission, , 345 , 137.5 , 13.8 , 270 ,  , 1 2021-12-31 C000524 , Federal Tax, , 2020-12-31 C000524 T/OH/Transco Work , 2774291.96ferc:ElectricUtilityMember 2021-12-31 C000524 ferc:OtherTaxesAndFeesMember 2021-01-012021-12-31 C000524 Capital Contributions from Parent 2021-01-012021-12-31 C000524 LAMPING - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 1 2021-12-31 C000524 ferc:ElectricUtilityMember 4% 2021-01-012021-12-31 C000524 0099 POSTON, ROSEWOOD, 1, 2.71, 1272 KCM ACSR 2021-01-012021-12-31 C000524 Other (provide details in footnote): 2021-01-012021-12-31 C000524 OH-Transco Line Rebuild-OHTC , 29763962.28ferc:ElectricUtilityMember 2021-12-31 C000524 Deferred Property Taxes 2020-12-31 C000524 EBERSOLE - OH, Transmission, , 138 , 70.5 , 36.2 , 90 ,  , 1 2021-01-012021-12-31 C000524 ferc:PropertyTaxMember 2021-12-31 C000524 , Local Tax, OH, 2020 2021-12-31 C000524 Senior Notes, Series B, Tranche D, 5.32% , 41585 2021-12-31 C000524 0047 SPORN, MUSKINGUM, 1, 2, (2) 959 KCM ACS 2021-01-012021-12-31 C000524 0ferc:Quarter2Member 2021-01-012021-12-31 C000524 David M. Feinberg, Vice President and Secretary 2021-01-012021-12-31 C000524 BABBITT - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 STEAMTOWN - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Net Operating Loss and Tax Credit Carryforwards 2021-01-012021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 138 , 70.5 , 13.8 , 54 ,  , 1 2021-12-31 C000524 20211221-5278, 44551, ER17-406 2021-01-012021-12-31 C000524 Research and Other Services, AEPSC 2021-01-012021-12-31 C000524 SUNNYSIDE - OH, Transmission, , 138 , 70.5 , 13.09 , 130 ,  , 1 2021-12-31 C000524 SFAS 109 Deferred FIT 2021-12-31 C000524 Purchases/Transfers:ferc:SulfurDioxideMember 2021-01-012021-12-31 C000524 WEST BELLAIRE - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-12-31 C000524 Senior Notes, Series J, 4.25% , 43350 2021-01-012021-12-31 C000524 OH Transco Work , 1282799.55ferc:ElectricUtilityMember 2021-12-31 C000524 OHTCo Baseline , 5417020.9 2021-01-012021-12-31 C000524 ScheduleSteamElectricGeneratingPlantStatisticsAbstract 2021-01-012021-12-31 C000524 NEW LIBERTY - OH, Transmission, , 138 , 70.5 , 36.2 , 432 ,  , 8 2021-12-31 C000524 Senior Notes, Series B, Tranche B, 4.05% , 41585 2021-12-31 C000524 4% 2021-01-012021-12-31 C000524 ScheduleAllowanceInventoryAbstract 2021-01-012021-12-31 C000524 ScheduleRegionalTransmissionServiceRevenuesAbstract 2021-01-012021-12-31 C000524 OH Transco Transmission Work , 1333177.21 2021-01-012021-12-31 C000524 Senior Notes, Series D, 3.10% , 42695 2021-01-012021-12-31 C000524 0093 OHIO CENTRAL EXT, , 1, 2.24, 954 KCM ACSR 2021-01-012021-12-31 C000524 0128 JUG STREET, SMITHS MILL, 1, 0.16, 795 KCM ACSR 2021-01-012021-12-31 C000524 PJM Formula Rate Filing 2021-01-012021-12-31 C000524 Senior Notes, Series A, Tranche E, 4.83% , 41351 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 6049338.38 2021-01-012021-12-31 C000524 Adoption of ASC 326 2021-01-012021-12-31 C000524 ferc:NonUtilityMember Other SFAS 109 2021-01-012021-12-31 C000524 OH Transco Work , 1282799.55 2021-01-012021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 2021-12-31 C000524 398 2021-01-012021-12-31 C000524 NERC Penalty 2021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-01-012021-12-31 C000524 0 2021-01-012021-12-31 C000524 ScheduleCapitalStockAbstract 2021-01-012021-12-31 C000524 BIXBY - OH, Transmission, , 345 , 138 , 34.5 , 2700 ,  , 12 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Transmission Work , 1333177.21 2021-12-31 C000524 BLUE RACER - OH, Transmission, , 138 , 0 , 0 , 0 , STATCAP , 2021-12-31 C000524 Senior Notes, Series C, Tranche G, 4.01% , 42170 2021-01-012021-12-31 C000524 Administrative and General Expenses - Operation, AEPSC 2021-01-012021-12-31 C000524 NEWCOMERSTOWN - OH, Transmission, , 138 , 70.5 , 13.09 , 78 ,  , 1 2021-01-012021-12-31 C000524 Corporate Accounting, AEPSC 2021-01-012021-12-31 C000524 SFAS 109 2021-01-012021-12-31 C000524 ScheduleExtraordinaryPropertyLossesAbstract 2021-01-012021-12-31 C000524 0184 HANGING ROCK EXT, , 3, 0, 636 KCM ACSR 2021-01-012021-12-31 C000524 Mark C. McCullough, President and Chief Operating Officer 2021-01-012021-12-31 C000524 ferc:OperatingUtilityMember 2021-01-012021-12-31 C000524 FIREBRICK - OH, Transmission, , 138 , 69 , 13.8 , 54 ,  , 1 2021-12-31 C000524 0038 HILLSBORO, HIGHLAND, 1, 3.25, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0 2021-01-012021-12-31 C000524 0159 STEMPLE EXT, , 1, 0.45, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember 2020-12-31 C000524 B: Electric RD&D Performed External, 4 items under $50,000 2021-01-012021-12-31 C000524 0270 EAST LIMA, SORENSON, 1, 1.11, (2) 954 KCM ACSS 2021-01-012021-12-31 C000524 BEATTY ROAD - OH, Transmission, , 138 , 70.5 , 13.8 , 54 ,  , 1 2021-01-012021-12-31 C000524 0246 HEPPNER, RHODES, 1, 0.19, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 6049338.38 2021-12-31 C000524 20211101-5316, 44501, ER17-406 2021-01-012021-12-31 C000524 FULLY OWNED TRANS LINES:, , , , 2021-01-012021-12-31 C000524 Trustee Fees 2021-01-012021-12-31 C000524 07-0095 PORTSMOUTH, TRENTON NO. 1, 1, 4.25, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:IncomeTaxMember 2021-01-012021-12-31 C000524 Physical & Cyber Security, AEPSC 2021-01-012021-12-31 C000524 0112 AZALEA EXT EAST, , 1, 0.41, 959 KCM ACSR 2021-01-012021-12-31 C000524 0238 LAMPING EXT WEST, , 1, 0.48, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 KILLBUCK - OH, Distribution, , 34.5 ,  ,  , 0 , STATCAP , 2021-01-012021-12-31 C000524 OHTCo-Baseline , 2944119.57 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche G, 4.01% , 42170 2021-12-31 C000524 OH Transco Work , 1270438.07ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ScheduleSalesForResaleAbstract 2021-01-012021-12-31 C000524 0275 June Road 138kV Extension, North, , 1, 0.116 2021-01-012021-12-31 C000524 SUNNYSIDE - OH, Transmission, , 138 , 70.5 , 13.09 , 130 ,  , 1 2021-01-012021-12-31 C000524 20210525-5244, 44341, ER17-406 2021-01-012021-12-31 C000524 Salerno 138kV Sta Install 380 , 1121857.69ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:OperatingUtilityMember 2020-12-31 C000524 BIXBY - OH, Transmission, , 345 , 138 , 34.5 , 2700 ,  , 12 2021-12-31 C000524 0029 VASSELL EXT WEST, , 1, 0.9, 954 KCM ACSR 2021-01-012021-12-31 C000524 ADOBE SWITCH - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 2020 PJM Transmission True-upAmortization Period 01/2022 - 12/2022 2021-01-012021-12-31 C000524 Notes Payable to Associated Companies - Issued 2020-01-012020-12-31 C000524 Audit Services, AEPSC 2021-01-012021-12-31 C000524 HARRISON - OH, Transmission, , 69 ,  ,  ,  , REACTIVE SPECIAL , 2021-12-31 C000524 Ohio Transco work , 2167515.29 2021-01-012021-12-31 C000524 Insurance Receivable 2020-01-012020-12-31 C000524 ScheduleElectricPlantHeldForFutureUseAbstract 2021-01-012021-12-31 C000524 Acquired Assets 2021-01-012021-12-31 C000524 0174 REXFORD EXT, , 1, 0.76, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo-Baseline , 2944119.57 2021-01-012021-12-31 C000524 0157 YAGER, DESERT ROAD, 2, 0.17, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0158 NORTH PROCTORVILLE, BUS TIE, 1, 0.09, (2) 1590 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Ohio Transco work , 7879797.59 2021-12-31 C000524 ScheduleMonthlyPeakAndOutputAbstract 2021-01-012021-12-31 C000524 0280 Clinton County (Duke), Hillsboro, 1, 17.3, 1033 KCM ACSR 2021-01-012021-12-31 C000524 transmission line., Total shown in column j-p, , , 2021-01-012021-12-31 C000524 3% 2021-01-012021-12-31 C000524 ferc:OtherStateTaxMember 2021-01-012021-12-31 C000524 0187 WEST BELLAIRE, BRUES, 3, 3.95, 556 KCM ACSR 2021-01-012021-12-31 C000524 350 (Rights) , 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2020 2021-01-012021-12-31 C000524 0215 TRIMBLE EXTENSION, , 1, 1.25, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Senior Notes, Series A, Tranche A, 3.30% 2021-12-31 C000524 SchedulePurchasesSalesOfAncillaryServicesAbstract 2021-01-012021-12-31 C000524 AZALEA SW STATION - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 ferc:OtherStateTaxMember 2020-12-31 C000524 Ohio Transco work , 11106542.27 2021-01-012021-12-31 C000524 0ferc:Quarter4Member 2021-01-012021-12-31 C000524 0344 Babbitt Bus Tie No. 2, , 1, 0.23, (2) 1033 KCM ACSS 2021-01-012021-12-31 C000524 NEWCOMERSTOWN - OH, Transmission, , 138 , 70.5 , 13.09 , 78 ,  , 1 2021-12-31 C000524 COLE (CS) - OH, Transmission, , 138 , 70.5 , 36.2 , 54 ,  , 1 2021-12-31 C000524 0276 June Road EXT South, , 1, 0.12, 1351 KCM ACSR 2021-01-012021-12-31 C000524 0202 HERLAN, BLUE RACER, 1, 0.49, 1033 KCM ACSR 2021-01-012021-12-31 C000524 T/OH/Ohio Transco work , 6500430.63 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo Supplemental , 1234297.86 2021-01-012021-12-31 C000524 8020 POSTON, HARRISON, 1, 0.02, 636 KCM ACSR 2021-01-012021-12-31 C000524 VASSELL - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-01-012021-12-31 C000524 0182 SOUTH CANTON, WEST CANTON, 3, 2.58, 795 KCM ACSR 2021-01-012021-12-31 C000524 0165 ARENDS RIDGE SW, DEVOLA, 1, 3.42, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0113 TIMBER SWITCH, HAVILAND, 1, 11, 1233 KCM ACSR 2021-01-012021-12-31 C000524 Property Tax, Property Tax, OH, 2021 2021-01-012021-12-31 C000524 Sales and Use Tax, Sales And Use Tax, OH, 2020 2021-12-31 C000524 0269 BABBITT LOOP, , 1, 0.12, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 KIRK - OH, Transmission, , 345 , 138 , 34.5 ,  ,  , 1 2021-12-31 C000524 0278 HUTCHINGS TAP, MIDDLEBORO SW, 2, 15, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:OtherUtilityMember 2021-12-31 C000524 ferc:ElectricUtilityMember OHTCo Baseline , 5417020.9 2021-12-31 C000524 0207 WEST BELLAIRE EXT, , 1, 0.58, 1033 KCM ACSR 2021-01-012021-12-31 C000524 GRISTMILL - OH, Transmission, , 345 , 138 , 13.8 ,  ,  , 1 2021-12-31 C000524 Supplemental Ohio TransCo Work , 7501456.61 2021-01-012021-12-31 C000524 ferc:OtherUtilityMember Other (Specify) 2020-12-31 C000524 ferc:ElectricUtilityMember Provision for Revenue Refund 2020-12-31 C000524 Increases (Decreases) Due to Miscellaneous Paid-In Capital 2021-01-012021-12-31 C000524 STERLING - OH, Transmission, , 34.5 ,  ,  ,  , STATCAP , 2021-12-31 C000524 ferc:ElectricUtilityMember OH Transco , 5359340.99 2021-01-012021-12-31 C000524 FERC OATT, PJM Interconnection LLC - Attachment H-20, ER17-406 2021-01-012021-12-31 C000524 ferc:OtherUtilityMember Other (Specify) 2021-12-31 C000524 ADAMS (CSP) - OH, Transmission, , 138 , 69 , 13 , 60 ,  , 4 2021-01-012021-12-31 C000524 Other Accounts (Specify, provide details in footnote): 2021-01-012021-12-31 C000524 OH Transco Work , 4449281.48 2021-01-012021-12-31 C000524 0099 POSTON, ROSEWOOD, 1, 0.41, 1272 KCM ACSR 2021-01-012021-12-31 C000524 0270 EAST LIMA, SORENSON, 3, 29.13, (2) 954 KCM ACSS 2021-01-012021-12-31 C000524 FOSTORIA CENTRAL - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 2021-01-012021-12-31 C000524 Senior Notes, Series A, Tranche A, 3.30% 2021-01-012021-12-31 C000524 CONTINENTAL - OH, Distribution, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 0186 GLENCOE, WEST BELLAIRE, 1, 5.59, 1033 KCM ACSR 2021-01-012021-12-31 C000524 SOUTH BALTIMORE - OH, Transmission, , 138 , 70.5 , 13.09 , 90 ,  , 1 2021-12-31 C000524 Line Costs and expenses are, not available by individual, , , 2021-01-012021-12-31 C000524 YAGER - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Bluffton Supp Transco CI , 4065199.76 2021-01-012021-12-31 C000524 0247 HEPPNER, LICK, 2, 0.23, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember SS-CI-OH-Transco GEN PLT , 1496428.98 2021-12-31 C000524 FREEBYRD - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 ferc:PropertyTaxMember 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Lick Rebuild - Transco CI , 2253202.95 2021-01-012021-12-31 C000524 OH Transco Work , 3639086.46ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 , Federal Tax, ,ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 CLOUSE - OH, Distribution, , 138 , 69 , 13.09 , 130 ,  , 1 2021-01-012021-12-31 C000524 ScheduleTransmissionServiceAndGenerationInterconnectionStudyCostsAbstract 2021-01-012021-12-31 C000524 HIGHLAND (CS) - OH, Distribution, , 138 , 69 , 12 , 90 ,  , 1 2021-12-31 C000524 0203 SUMMERFIELD, BERNE, 1, 3.35, 1033 KCM ACSR 2021-01-012021-12-31 C000524 COLE (CS) - OH, Transmission, , 138 , 13.8 ,  , 50 ,  , 1 2021-12-31 C000524 Senior Notes, Series E, 4.00% , 42695 2021-12-31 C000524 0026 YELLOW CREEK EXT, , 1, 0.41, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Senior Notes, Series C, Tranche F, 3.81% , 41957 2021-12-31 C000524 OH TRANSCo Pre Eng Parent , 16845960.82ferc:ElectricUtilityMember 2021-12-31 C000524 FOSTORIA CENTRAL - OH, Transmission, , 345 , 138 , 13.8 , 450 ,  , 1 2021-12-31 C000524 SOUTH FULTONHAM - OH, Distribution, ,  ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Supplemental Ohio TransCo Work , 7501456.61 2021-12-31 C000524 OHIO CENTRAL - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-01-012021-12-31 C000524 0188 GEORGE WASHINGTON, DILLES BOTTOM, 1, 0.05, 1233 KCM ACSS 2021-01-012021-12-31 C000524 Transco Work CI , 15548009.57ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0276 June Road 138kV Extension, South, , 1, 0.122 2021-01-012021-12-31 C000524 DeCliff_LaRue Transco CI , 12367699.73ferc:ElectricUtilityMember 2021-12-31 C000524 Senior Notes, Series L, 3.15% , 43719 2021-01-012021-12-31 C000524 DSIT Entry-Normalized 2021-01-012021-12-31 C000524 DILLES BOTTOM - OH, Distribution, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 BIXBY - OH, Transmission, , 345 ,  ,  , 675 ,  , 3 2021-01-012021-12-31 C000524 0133 Bell Ridge Sw, Rouse Sw, 1, 3.63, 795 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Bluffton Supp Transco CI , 4065199.76 2021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Work , 22748354.13 2021-12-31 C000524 ferc:OtherTaxesAndFeesMember 2020-12-31 C000524 YAGER - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Capital Contributions from Parent 2020-01-012020-12-31 C000524 NEW LIBERTY - OH, Transmission, , 138 , 70.5 , 36.2 , 432 ,  , 8 2021-01-012021-12-31 C000524 0197 HAVILAND, NORTH DELPHOS, 1, 31.6, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Work , 17080564.17 2021-12-31 C000524 Zanesville Area TTMP TC380 CI , 1133409.9 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2020ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ELLIOTT - OH, Transmission, , 138 , 70.5 , 13.09 , 78 ,  , 1 2021-12-31 C000524 OH-Transco Line Rebuild-OHTC , 29763962.28 2021-01-012021-12-31 C000524 Other Minor Projects Under $1,000,000 , 20112676.64 2021-01-012021-12-31 C000524 , Income Tax, , 2021-12-31 C000524 SOUTH BALTIMORE - OH, Transmission, , 138 , 70.5 , 13.09 , 90 ,  , 1 2021-01-012021-12-31 C000524 0290 GEMINI, GRISTMILL, 1, 3.97, 795 KCM ACSR 2021-01-012021-12-31 C000524 Regulatory Services, AEPSC 2021-01-012021-12-31 C000524 HANGING ROCK 765KV - OH, Transmission, , 765 ,  ,  ,  , REACTOR ,  , 3 2021-01-012021-12-31 C000524 Increases (Decreases) from Donations Received from Stockholders 2021-01-012021-12-31 C000524 BABBITT - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Ohio TansCo Work , 4807967ferc:ElectricUtilityMember 2021-12-31 C000524 ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 T/OH Trans/Transco Wrk , 18414832.82ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0106 POLO ROAD TAP, INTERCO FIRST ENERGY, 1, 1.3, 795 KCM ACSR 2021-01-012021-12-31 C000524 Billings and Deferred Projects 2021-12-31 C000524 0247 HEPPNER, LICK, 1, 0.76, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ScheduleDistributionOfSalariesAndWagesAbstract 2021-01-012021-12-31 C000524 Other (provide details in footnote): 2021-01-012021-12-31 C000524 2020 PJM Transmission True-upAmortization Period 01/2022 - 12/2022 2021-12-31 C000524 BABBITT - OH, Transmission, , 345 , 138 , 34.5 ,  ,  , 1 2021-01-012021-12-31 C000524 Corporate Planning & Budgeting, AEPSC 2021-01-012021-12-31 C000524 358 , 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Accrued Companywide Incentive Compensation 2021-12-31 C000524 ScheduleAccumulatedDeferredInvestmentTaxCreditsAbstract 2021-01-012021-12-31 C000524 Transco Work CI , 15548009.57ferc:ElectricUtilityMember 2021-12-31 C000524 T/OHTC/NERC Physical Security , 22016896.02ferc:ElectricUtilityMember 2021-12-31 C000524 COLE (CS) - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-12-31 C000524 ferc:ElectricUtilityMember OH Transco Work , 17080564.17 2021-01-012021-12-31 C000524 EAST WILLARD - OH, Distribution, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 0192 WEST MOUNT VERNON, NORTH WALDO, 1, 2.43, 1033 KCM ACSR 2021-01-012021-12-31 C000524 HANGING ROCK 765KV - OH, Transmission, , 765 ,  ,  ,  , REACTOR ,  , 3 2021-12-31 C000524 Purchases/Transfers:ferc:NitrogenOxideMember 2021-01-012021-12-31 C000524 Senior Notes, Series J, 4.25% , 43350 2021-12-31 C000524 0133 Bell Ridge Sw, Rouse Sw, 2, 8.9, 795 KCM ACSR 2021-01-012021-12-31 C000524 0189 DILLES BOTTOM, FE CORRIDOR, 3, 1.05, 1233 KCM ACSS/TW 2021-01-012021-12-31 C000524 HOLLOWAY - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-12-31 C000524 0286 Guernsey EXT EAST, , 1, 0.33, (4) 954 KCM ACSR 2021-01-012021-12-31 C000524 A (2): Transmission, 1 item under $50,000 2021-01-012021-12-31 C000524 HOLLOWAY - OH, Transmission, , 345 , 138 , 34.5 , 405 ,  , 1 2021-01-012021-12-31 C000524 Transco Work , 17647512.17 2021-01-012021-12-31 C000524 STERLING - OH, Transmission, , 34.5 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Other State Tax, Other State Tax, OH, 2020 2020-12-31 C000524 ScheduleCapitalStockExpenseAbstract 2021-01-012021-12-31 C000524 0168 DEVOLA, MILL CREEK, 1, 0.41, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0142 MELMORE, TIFFIN CENTER, 1, 7.1, 477 KCM ACSR 2021-01-012021-12-31 C000524 SOUTHEAST CANTON - OH, Transmission, , 345 , 138 , 34.5 , 675 ,  , 1 2021-12-31 C000524 353.16 , 2021-01-012021-12-31 C000524 0079 MUSKINGUM, TIDD, 3, 13.15, 1851 KCM ACCR 2021-01-012021-12-31 C000524 DON MARQUIS (OP-CS) (OVEC) - OH, Transmission, , 765 , 345 , 34.5 , 2250 ,  , 3 2021-12-31 C000524 Legal GC/Administration, AEPSC 2021-01-012021-12-31 C000524 VASSELL - OH, Transmission, , 138 , 35.4 , 13.8 , 30 ,  , 1 2021-01-012021-12-31 C000524 Senior Notes, Series B, Tranche F, 5.52% , 41942 2021-12-31 C000524 SWITZER - OH, Transmission, , 138 , 69 , 34.5 , 50 ,  , 1 2021-01-012021-12-31 C000524 ScheduleEnergyStorageOperationsLargePlantsAbstract 2021-01-012021-12-31 C000524 0271 SARDINIA EXTENSION, , 1, 3.8, 556 KCM ACSR 2021-01-012021-12-31 C000524 0136 SOUTH OLIVE SW, MACKSBURG, 1, 3.27, 1033 KCM ACSR 2021-01-012021-12-31 C000524 2021-12-31 C000524 Corp Prgrm Billing - AEP OH Tr , 3029042.27 2021-01-012021-12-31 C000524 Other Deferred Credits 2020-12-31 C000524 0044 SPEIDEL, BARNESVILLE, 1, 3.82, 1233 KCM ACSS 2021-01-012021-12-31 C000524 0160 LEVEE EXTENSION, , 1, 0.18, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ScheduleMonthlyTransmissionSystemPeakLoadAbstract 2021-01-012021-12-31 C000524 , Local Tax, OH, 2017 2021-12-31 C000524 BABBITT - OH, Transmission, , 138 ,  ,  ,  , AIR CORE REACTOR , 2021-01-012021-12-31 C000524 ANGUIN - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0088 TIDD, SUNNYSIDE, 1, 30.56, 1233 KCM ACSS 2021-01-012021-12-31 C000524 0164 FREEBYRD, SOUTH CADIZ, 2, 2.3, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember T/OH/Ohio Transco work , 6500430.63 2021-01-012021-12-31 C000524 ferc:OtherUtilityMember Other (Specify) 2021-01-012021-12-31 C000524 ADAMS (CSP) - OH, Transmission, , 138 , 69 , 13.09 , 60 ,  , 4 2021-01-012021-12-31 C000524 Lines Under 138KV, , , 628.08, 2021-01-012021-12-31 C000524 Senior Notes, Series K, 3.80% , 43628 2021-12-31 C000524 2020-01-012020-12-31 C000524 ferc:ElectricUtilityMember Lick Rebuild - Transco CI , 2253202.95 2021-12-31 C000524 Information Technology, AEPSC 2021-01-012021-12-31 C000524 0280 Clinton County (Duke), Hillsboro, 1, 17.3 2021-01-012021-12-31 C000524 Allowances Usedferc:NitrogenOxideMember 2021-01-012021-12-31 C000524 0060 LIMA, STERLING, 1, 5.87, 795 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Other Minor Projects Under $1,000,000 , 20112676.64 2021-12-31 C000524 Senior Notes, Series D, 3.10% , 161540 2021-01-012021-12-31 C000524 2020 PJM Transmission True-upAmortization Period 01/2022 - 12/2022 2020-12-31 C000524 ferc:ElectricUtilityMember DSIT Entry Normalized 2020-12-31 C000524 RHODES - OH, Transmission, , 138 , 69 , 13.09 , 720 ,  , 8 2021-12-31 C000524 DSIT Entry-Normalizedferc:ElectricUtilityMember 2021-12-31 C000524 DESERT ROAD SW - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-12-31 C000524 Senior Notes, Series B, Tranche D, 5.32% , 41585 2021-01-012021-12-31 C000524 NOL-Deferred Tax Asset 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember 7% 2021-01-012021-12-31 C000524 0213 RAIDER EXT, , 1, 0.05, 1033 KCM ACSR 2021-01-012021-12-31 C000524 Transmission Expenses - Operation, AEPSC 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMemberferc:GeneralPlantMember 2021-01-012021-12-31 C000524 OH Transco Work , 1270438.07 2021-01-012021-12-31 C000524 0216 SOUTH OLIVE SW, SOUTH OLIVE (WEC) TAP, 1, 0.07, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0089 STEAMTOWN, 138KV LOOP, 1, 0.86, 556 KCM ACSR 2021-01-012021-12-31 C000524 0321 Astor Extension, , 1, 0.18, 795 KCM ACSR 2021-01-012021-12-31 C000524 OHTCo-Supplemental , 5798030.74ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 0330 Hyatt, Delaware, 1, 0.1 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Provision for Revenue Refund 2021-01-012021-12-31 C000524 0, 0 2021-01-012021-12-31 C000524 , Income Tax, , 2020-12-31 C000524 0285 Guernsey EXT WEST, , 1, 0.29, (4) 954 KCM ACSR 2021-01-012021-12-31 C000524 8019 BIXBY, GROVES ROAD-ASTOR, 1, 4.35, 1926 KCM ACSR 2021-01-012021-12-31 C000524 0116 SCIPPO EXTENSION, , 1, 0.86, 1590 KCM ACSR 2021-01-012021-12-31 C000524 HERLAN SWITCH - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 OHTCo Supplemental , 1234297.86 2021-01-012021-12-31 C000524 8044 TRENT, DELAWARE, 3, 12.66, 1272 KCM ACSR 2021-01-012021-12-31 C000524 Senior Notes, Series E, 4.00% , 42695 2021-01-012021-12-31 C000524 DESERT ROAD SW - OH, Transmission, , 69 ,  ,  ,  , STATCAP , 2021-01-012021-12-31 C000524 Property Tax, Property Tax, OH, 2020 2021-01-012021-12-31 C000524 , Federal Tax, , 2021-01-012021-12-31 C000524 Senior Notes, Series M, 3.65% , 43922 2021-01-012021-12-31 C000524 OH Transco Work , 1270438.07ferc:ElectricUtilityMember 2021-12-31 C000524 0146 COLE, AMLIN, 3, 0, (2) 954 KCM ACSR 2021-01-012021-12-31 C000524 BIERS RUN - OH, Transmission, ,  ,  ,  , 0 , STATCAP , 2021-01-012021-12-31 C000524 SOUTH FULTONHAM - OH, Distribution, ,  ,  ,  ,  , STATCAP , 2021-12-31 C000524 Bluffton Transco CI , 1173370.3ferc:ElectricUtilityMember 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember OHTCo-Baseline , 2944119.57 2021-12-31 C000524 STEAMTOWN - OH, Transmission, , 138 ,  ,  ,  , STATCAP , 2021-12-31 C000524 0156 DENNISON, YAGER, 1, 1.81, 1033 KCM ACSR 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Corp Prgrm Billing - AEP OH Tr , 3029042.27 2021-01-012021-12-31 C000524 ferc:ElectricUtilityMember Crooksville-N.Newark Transco , 1172586.26 2021-01-012021-12-31 C000524 0359 Marysville, Peoria, 1, 0.17 2021-01-012021-12-31 C000524 , Local Tax, OH, 2019 2021-12-31 C000524 A (6): Other, 2 items under $50,000 2021-01-012021-12-31 C000524 B(4): Research Support to Others, 1 items under $50,000 2021-01-012021-12-31 C000524 Senior Notes, Series M, 3.65% , 43922 2021-12-31 C000524 0113 TIMBER SWITCH, HAVILAND, 1, 0.47, 1033 KCM ACSR 2021-01-012021-12-31 C000524 0330 Hyatt, Delaware, 1, 0.1, 795 KCM ACSS 2021-01-012021-12-31 C000524 0222 Seaman, Adams, 2, 0.39 2021-01-012021-12-31 C000524 0275 June Road EXT North, , 1, 0.12, 1351 KCM ACSR 2021-01-012021-12-31 C000524 Ohio Transco work , 3553267.65ferc:ElectricUtilityMember 2021-01-012021-12-31 utr:MW iso4217:USD utr:MVA iso4217:USD utr:kWh utr:kWh utr:mi utr:kV xbrli:pure utr:mi xbrli:pure utr:MWh
THIS FILING IS
Item 1:
An Initial (Original) Submission
OR
Resubmission No.

FERC FINANCIAL REPORT
FERC FORM No. 1: Annual Report of
Major Electric Utilities, Licensees
and Others and Supplemental
Form 3-Q: Quarterly Financial Report

These reports are mandatory under the Federal Power Act, Sections 3, 4(a), 304 and 309, and 18 CFR 141.1 and 141.400. Failure to report may result in criminal fines, civil penalties and other sanctions as provided by law. The Federal Energy Regulatory Commission does not consider these reports to be of confidential nature
Exact Legal Name of Respondent (Company)

AEP Ohio Transmission Company, Inc.
Year/Period of Report

End of:
2021
/
Q4


INSTRUCTIONS FOR FILING FERC FORM NOS. 1 and 3-Q

GENERAL INFORMATION

  1. Purpose

    FERC Form No. 1 (FERC Form 1) is an annual regulatory requirement for Major electric utilities, licensees and others (18 C.F.R. § 141.1). FERC Form No. 3-Q ( FERC Form 3-Q) is a quarterly regulatory requirement which supplements the annual financial reporting requirement (18 C.F.R. § 141.400). These reports are designed to collect financial and operational information from electric utilities, licensees and others subject to the jurisdiction of the Federal Energy Regulatory Commission. These reports are also considered to be non-confidential public use forms.
  2. Who Must Submit

    Each Major electric utility, licensee, or other, as classified in the Commission’s Uniform System of Accounts Prescribed for Public Utilities, Licensees, and Others Subject To the Provisions of The Federal Power Act (18 C.F.R. Part 101), must submit FERC Form 1 (18 C.F.R. § 141.1), and FERC Form 3-Q (18 C.F.R. § 141.400).

    Note: Major means having, in each of the three previous calendar years, sales or transmission service that exceeds one of the following:
    1. one million megawatt hours of total annual sales,
    2. 100 megawatt hours of annual sales for resale,
    3. 500 megawatt hours of annual power exchanges delivered, or
    4. 500 megawatt hours of annual wheeling for others (deliveries plus losses).
  3. What and Where to Submit

    1. Submit FERC Form Nos. 1 and 3-Q electronically through the eCollection portal at https://eCollection.ferc.gov, and according to the specifications in the Form 1 and 3-Q taxonomies.
    2. The Corporate Officer Certification must be submitted electronically as part of the FERC Forms 1 and 3-Q filings.
    3. Submit immediately upon publication, by either eFiling or mail, two (2) copies to the Secretary of the Commission, the latest Annual Report to Stockholders. Unless eFiling the Annual Report to Stockholders, mail the stockholders report to the Secretary of the Commission at:
      Secretary
      Federal Energy Regulatory Commission 888 First Street, NE
      Washington, DC 20426
    4. For the CPA Certification Statement, submit within 30 days after filing the FERC Form 1, a letter or report (not applicable to filers classified as Class C or Class D prior to January 1, 1984). The CPA Certification Statement can be either eFiled or mailed to the Secretary of the Commission at the address above.

      The CPA Certification Statement should:
      1. Attest to the conformity, in all material aspects, of the below listed (schedules and pages) with the Commission's applicable Uniform System of Accounts (including applicable notes relating thereto and the Chief Accountant's published accounting releases), and
      2. Be signed by independent certified public accountants or an independent licensed public accountant certified or licensed by a regulatory authority of a State or other political subdivision of the U. S. (See 18 C.F.R. §§ 41.10-41.12 for specific qualifications.)

        Schedules
        Pages
        Comparative Balance Sheet 110-113
        Statement of Income 114-117
        Statement of Retained Earnings 118-119
        Statement of Cash Flows 120-121
        Notes to Financial Statements 122-123
    5. The following format must be used for the CPA Certification Statement unless unusual circumstances or conditions, explained in the letter or report, demand that it be varied. Insert parenthetical phrases only when exceptions are reported.

      “In connection with our regular examination of the financial statements of [COMPANY NAME] for the year ended on which we have reported separately under date of [DATE], we have also reviewed schedules [NAME OF SCHEDULES] of FERC Form No. 1 for the year filed with the Federal Energy Regulatory Commission, for conformity in all material respects with the requirements of the Federal Energy Regulatory Commission as set forth in its applicable Uniform System of Accounts and published accounting releases. Our review for this purpose included such tests of the accounting records and such other auditing procedures as we considered necessary in the circumstances.

      Based on our review, in our opinion the accompanying schedules identified in the preceding paragraph (except as noted below) conform in all material respects with the accounting requirements of the Federal Energy Regulatory Commission as set forth in its applicable Uniform System of Accounts and published accounting releases.” The letter or report must state which, if any, of the pages above do not conform to the Commission’s requirements. Describe the discrepancies that exist.
    6. Filers are encouraged to file their Annual Report to Stockholders, and the CPA Certification Statement using eFiling. Further instructions are found on the Commission’s website at https://www.ferc.gov/ferc-online/ferc-online/frequently-asked-questions-faqs-efilingferc-online.
    7. Federal, State, and Local Governments and other authorized users may obtain additional blank copies of FERC Form 1 and 3-Q free of charge from https://www.ferc.gov/general-information-0/electric-industry-forms.
  4. When to Submit

    FERC Forms 1 and 3-Q must be filed by the following schedule:

    1. FERC Form 1 for each year ending December 31 must be filed by April 18th of the following year (18 CFR § 141.1), and
    2. FERC Form 3-Q for each calendar quarter must be filed within 60 days after the reporting quarter (18 C.F.R. § 141.400).
  5. Where to Send Comments on Public Reporting Burden.

    The public reporting burden for the FERC Form 1 collection of information is estimated to average 1,168 hours per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data-needed, and completing and reviewing the collection of information. The public reporting burden for the FERC Form 3-Q collection of information is estimated to average 168 hours per response.

    Send comments regarding these burden estimates or any aspect of these collections of information, including suggestions for reducing burden, to the Federal Energy Regulatory Commission, 888 First Street NE, Washington, DC 20426 (Attention: Information Clearance Officer); and to the Office of Information and Regulatory Affairs, Office of Management and Budget, Washington, DC 20503 (Attention: Desk Officer for the Federal Energy Regulatory Commission). No person shall be subject to any penalty if any collection of information does not display a valid control number (44 U.S.C. § 3512 (a)).

GENERAL INSTRUCTIONS

  1. Prepare this report in conformity with the Uniform System of Accounts (18 CFR Part 101) (USofA). Interpret all accounting words and phrases in accordance with the USofA.
  2. Enter in whole numbers (dollars or MWH) only, except where otherwise noted. (Enter cents for averages and figures per unit where cents are important. The truncating of cents is allowed except on the four basic financial statements where rounding is required.) The amounts shown on all supporting pages must agree with the amounts entered on the statements that they support. When applying thresholds to determine significance for reporting purposes, use for balance sheet accounts the balances at the end of the current reporting period, and use for statement of income accounts the current year's year to date amounts.
  3. Complete each question fully and accurately, even if it has been answered in a previous report. Enter the word "None" where it truly and completely states the fact.
  4. For any page(s) that is not applicable to the respondent, omit the page(s) and enter "NA," "NONE," or "Not Applicable" in column (d) on the List of Schedules, pages 2 and 3.
  5. Enter the month, day, and year for all dates. Use customary abbreviations. The "Date of Report" included in the header of each page is to be completed only for resubmissions (see VII. below).
  6. Generally, except for certain schedules, all numbers, whether they are expected to be debits or credits, must be reported as positive. Numbers having a sign that is different from the expected sign must be reported by enclosing the numbers in parentheses.
  7. For any resubmissions, please explain the reason for the resubmission in a footnote to the data field.
  8. Do not make references to reports of previous periods/years or to other reports in lieu of required entries, except as specifically authorized.
  9. Wherever (schedule) pages refer to figures from a previous period/year, the figures reported must be based upon those shown by the report of the previous period/year, or an appropriate explanation given as to why the different figures were used.
  10. Schedule specific instructions are found in the applicable taxonomy and on the applicable blank rendered form.
Definitions for statistical classifications used for completing schedules for transmission system reporting are as follows:

FNS - Firm Network Transmission Service for Self. "Firm" means service that can not be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Network Service" is Network Transmission Service as described in Order No. 888 and the Open Access Transmission Tariff. "Self" means the respondent.

FNO - Firm Network Service for Others. "Firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Network Service" is Network Transmission Service as described in Order No. 888 and the Open Access Transmission Tariff.

LFP - for Long-Term Firm Point-to-Point Transmission Reservations. "Long-Term" means one year or longer and” firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Point-to-Point Transmission Reservations" are described in Order No. 888 and the Open Access Transmission Tariff. For all transactions identified as LFP, provide in a footnote the termination date of the contract defined as the earliest date either buyer or seller can unilaterally cancel the contract.

OLF - Other Long-Term Firm Transmission Service. Report service provided under contracts which do not conform to the terms of the Open Access Transmission Tariff. "Long-Term" means one year or longer and “firm” means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. For all transactions identified as OLF, provide in a footnote the termination date of the contract defined as the earliest date either buyer or seller can unilaterally get out of the contract.

SFP - Short-Term Firm Point-to-Point Transmission Reservations. Use this classification for all firm point-to-point transmission reservations, where the duration of each period of reservation is less than one-year.

NF - Non-Firm Transmission Service, where firm means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions.

OS - Other Transmission Service. Use this classification only for those services which can not be placed in the above-mentioned classifications, such as all other service regardless of the length of the contract and service FERC Form. Describe the type of service in a footnote for each entry.

AD - Out-of-Period Adjustments. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment.

DEFINITIONS
  1. Commission Authorization (Comm. Auth.) -- The authorization of the Federal Energy Regulatory Commission, or any other Commission. Name the commission whose authorization was obtained and give date of the authorization.
  2. Respondent -- The person, corporation, licensee, agency, authority, or other Legal entity or instrumentality in whose behalf the report is made.

EXCERPTS FROM THE LAW

Federal Power Act, 16 U.S.C. § 791a-825r

Sec. 3. The words defined in this section shall have the following meanings for purposes of this Act, to with:

  1. ’Corporation' means any corporation, joint-stock company, partnership, association, business trust, organized group of persons, whether incorporated or not, or a receiver or receivers, trustee or trustees of any of the foregoing. It shall not include 'municipalities, as hereinafter defined;
  2. 'Person' means an individual or a corporation;
  3. 'Licensee, means any person, State, or municipality Licensed under the provisions of section 4 of this Act, and any assignee or successor in interest thereof;
  1. 'municipality means a city, county, irrigation district, drainage district, or other political subdivision or agency of a State competent under the Laws thereof to carry and the business of developing, transmitting, unitizing, or distributing power; ......
  1. "project' means. a complete unit of improvement or development, consisting of a power house, all water conduits, all dams and appurtenant works and structures (including navigation structures) which are a part of said unit, and all storage, diverting, or fore bay reservoirs directly connected therewith, the primary line or lines transmitting power there from to the point of junction with the distribution system or with the interconnected primary transmission system, all miscellaneous structures used and useful in connection with said unit or any part thereof, and all water rights, rights-of-way, ditches, dams, reservoirs, Lands, or interest in Lands the use and occupancy of which are necessary or appropriate in the maintenance and operation of such unit;

"Sec. 4. The Commission is hereby authorized and empowered
  1. 'To make investigations and to collect and record data concerning the utilization of the water 'resources of any region to be developed, the water-power industry and its relation to other industries and to interstate or foreign commerce, and concerning the location, capacity, development costs, and relation to markets of power sites; ... to the extent the Commission may deem necessary or useful for the purposes of this Act."

"Sec. 304.
  1. Every Licensee and every public utility shall file with the Commission such annual and other periodic or special* reports as the Commission may by rules and regulations or other prescribe as necessary or appropriate to assist the Commission in the proper administration of this Act. The Commission may prescribe the manner and FERC Form in which such reports shall be made, and require from such persons specific answers to all questions upon which the Commission may need information. The Commission may require that such reports shall include, among other things, full information as to assets and Liabilities, capitalization, net investment, and reduction thereof, gross receipts, interest due and paid, depreciation, and other reserves, cost of project and other facilities, cost of maintenance and operation of the project and other facilities, cost of renewals and replacement of the project works and other facilities, depreciation, generation, transmission, distribution, delivery, use, and sale of electric energy. The Commission may require any such person to make adequate provision for currently determining such costs and other facts. Such reports shall be made under oath unless the Commission otherwise specifies*.10
"Sec. 309.
  1. The Commission shall have power to perform any and all acts, and to prescribe, issue, make, and rescind such orders, rules and regulations as it may find necessary or appropriate to carry out the provisions of this Act. Among other things, such rules and regulations may define accounting, technical, and trade terms used in this Act; and may prescribe the FERC Form or FERC Forms of all statements, declarations, applications, and reports to be filed with the Commission, the information which they shall contain, and the time within which they shall be field..."

GENERAL PENALTIES

The Commission may assess up to $1 million per day per violation of its rules and regulations. See FPA § 316(a) (2005), 16 U.S.C. § 825o(a).


FERC FORM NO.
1

REPORT OF MAJOR ELECTRIC UTILITIES, LICENSEES AND OTHER
IDENTIFICATION
01 Exact Legal Name of Respondent

AEP Ohio Transmission Company, Inc.
02 Year/ Period of Report


End of:
2021
/
Q4
03 Previous Name and Date of Change (If name changed during year)

/
04 Address of Principal Office at End of Period (Street, City, State, Zip Code)

1 Riverside Plaza, 26th Flr, Columbus, Ohio 43215-2373
05 Name of Contact Person

Jason M.  Johnson
06 Title of Contact Person

Accountant
07 Address of Contact Person (Street, City, State, Zip Code)

1 Riverside Plaza, 26th Flr, Columbus, Ohio 43215-2373
08 Telephone of Contact Person, Including Area Code

(614) 716-1000
09 This Report is An Original / A Resubmission

(1)
An Original

(2)
A Resubmission
10 Date of Report (Mo, Da, Yr)

05/19/2022
Annual Corporate Officer Certification
The undersigned officer certifies that:

I have examined this report and to the best of my knowledge, information, and belief all statements of fact contained in this report are correct statements of the business affairs of the respondent and the financial statements, and other financial information contained in this report, conform in all material respects to the Uniform System of Accounts.

01 Name

Jeffrey W. Hoersdig
02 Title

Assistant Controller
03 Signature

Jeffrey W. Hoersdig
04 Date Signed (Mo, Da, Yr)

05/19/2022
Title 18, U.S.C. 1001 makes it a crime for any person to knowingly and willingly to make to any Agency or Department of the United States any false, fictitious or fraudulent statements as to any matter within its jurisdiction.