ALLEGHENY ENERGY, INC. and its SUBSIDIARIES' CORPORATE STRUCTURE Allegheny Allegheny Allegheny Monongahela The Potomac West Penn Ohio Valley Energy Energy Allegheny Green Valley Energy Power Edison Power Electric Service Supply Ventures, Inc. Hydro, LLC Transmission, Company Company Company Corporation Corporation Company, LLC (See Note 4) LLC Allegheny Allegheny Allegheny See See Trans-Allegheny Pittsburgh Pittsburgh Pittsburgh AET PATH Page 2 Page 3 Interstate Line Coal Coal Coal Company, LLC Company Company Company for Chart for Chart Company (See Note 1) (See Note 1) (See Note 1) Allegheny The West Generating PE Transferring Virginia Power & Agent, LLC Transmission Company Potomac-Appalachian Transmission Highline, LLC (See Note 2) Company Mon Power Virginia Capital, WPP Ohio Series West Virginia AYE Renaissance, L.L.C. Renaissance (See Note 5) Series Series LLC (See Note 3) Funding, LLC (See Note 5) Allegheny PATH Ohio PATH West PATH Energy OVEC PE Renaissance WPP Funding, Transmission Virginia Allegheny Supply Funding, LLC LLC Company, LLC Transmission Transmission Company, LLC Company, LLC Company, LLC PATH PATH - WV Allegheny PE Allegheny Land Energy Supply Environmental Virginia Acquisition Transmission Southwest, LLC Funding LLC Company Corporation PATH - PATH Allegheny MP Allegheny MP Renaissance Maryland Land Environmental Funding, LLC Transmission Acquisition Funding LLC Company, LLC Company (See Note 6) PATH Allegheny Maryland Transmission All companies are 100% owned by their parent Company, LLC corporation unless otherwise indicated by footnote. (See Note 6) Note 1: 25% owned by Monongahela Note 2: 40.62% owned by Note 3: .90% owned by The Note 4: 3.5% owned by Allegheny Note 5: AET PATH Company, LLC 50% Note 6: PATH Allegheny Transmission Company, LLC 95% Power Company, 25% owned by The Monongahela Power Company and Potomac Edison Company and Energy, Inc. and 96.5% owned by AEP Transmission Holding Company, LLC 50% The Potomac Edison Company 5% Potomac Edison Company, and 50% 59.38% owned by Allegheny Energy 99.10% owned by non-system non-system companies owned by West Penn Power Company Supply Company, LLC companies 02/12/10 - Page 1 of 4 Allegheny Energy Supply Company, LLC a subsidiary of Allegheny Energy, Inc. Allegheny Allegheny Allegheny Mon Synfuel, Generating Energy Supply Energy Supply Development Renaissance, LLC Company (See Note 4) (See Note 1) Services, LLC LLC Allegheny NYC Acadia Bay AE Supply Energy Supply Energy LLC Energy Company, Renaissance Capital, LLC (See Note 2) LLC Southwest, LLC Buchanan Energy Company of Virginia, LLC Buchanan Generation, LLC (See Note 3) All companies are 100% owned by their parent corporation unless otherwise indicated by footnote. Note 1: 40.62% owned Note 2: 50% owned by Note 3: 50% owned by Note 4: 2.45% owned by by Monongahela Power Allegheny Energy Supply Buchanan Energy Company Allegheny Energy Supply Company and 59.38% Development Services, of Virginia, LLC and 50% Company, LLC and 97.55% owned by Allegheny LLC and 50% owned by owned by non-system owned by non-system Energy Supply Company, non-system company company company LLC 02/12/10 - Page 2 of 4 Allegheny Ventures, Inc. a subsidiary of Allegheny Energy, Inc. Allegheny Allegheny AYP Utility Communications Energy Energy, Inc. Associates, Inc. Connect, Inc. Solutions, Inc. (See Note 5) Allegheny AFN Finance Communications APS Constellation, Company Connect of L.L.C. No. 2, LLC (See Note 3) Pennsylvania, LLC Allegheny MABCO Steam AFN, LLC Communications Company, LLC (See Note 1) Connect of Virginia, (See Note 4) Inc. Odyssey Communications, LLC (See Note 2) All companies are 100% owned by their parent corporation unless otherwise indicated by footnote. Footnotes referenced above are found on page 4 of 4. 02/12/10 - Page 3 of 4 ALLEGHENY VENTURES, INC. Notes for Organization Chart Note 1: AFN, LLC is 45.43% owned by Allegheny Communications Connect, Inc. and 54.6% owned by non-system companies. Note 2: Odyssey Communications, LLC is 40% owned by Allegheny Communications Connect, Inc. and 60% owned by non- system individuals. Note 3: APS Constellation, L.L.C. is 50% owned by Allegheny Ventures, Inc. and 50% owned by a non-system company. (Name changed 12/31/05). Note 4: MABCO Steam Company, LLC is 15.614% owned by Allegheny Ventures, Inc. and 84.386% owned by non-system companies. Note 5: Utility Associates, Inc. is 6.19% owned by Allegheny Ventures, Inc. and 93.81% owned by non-system individuals. 02/12/10 – Page 4 of 4 .