ACES Accelerated Clean Energy Supply  
  ANR The American Natural Resources Company and the ANR Storage Company, collectively  
  APG Aboriginal Pipeline Group  
  B.C. British Columbia  
  Bcf Billion cubic feet  
  Bcf/d Billion cubic feet per day  
  BPC BPC Generation Infrastructure Trust  
  Broadwater Broadwater Energy project  
  Bruce A Bruce Power A L.P.  
  Bruce B Bruce Power L.P.  
  Bruce Power The collective investments in Bruce A and Bruce B  
  Cacouna Cacouna Energy project  
  Calpine Calpine Corporation and certain of its subsidiaries  
  Cameco Cameco Corporation  
  CAPLA Canadian Alliance of Pipeline Landowners' Associations  
  CAPP Canadian Association of Petroleum Producers  
  CPPL ConocoPhillips Pipe Line Company  
  CrossAlta CrossAlta Gas Storage & Services Ltd.  
  DBRS Dominion Bond Rating Service Limited  
  DRP Dividend Reinvestment and Share Purchase Plan  
  EPCOR EPCOR Utilities Inc.  
  EUB Alberta Energy and Utilities Board  
  FCM Forward Capacity Market  
  FERC Federal Energy Regulatory Commission  
  Foothills Foothills Pipe Lines Ltd.  
  FT Firm transportation  
  GAAP Generally accepted accounting principles  
  Gas Pacifico Gasoducto del Pacifico S.A.  
  GJ Gigajoule  
  GRA General Rate Application  
  Great Lakes Great Lakes Gas Transmission Limited Partnership  
  GTA Greater Toronto Area  
  GTN Gas Transmission Northwest System and the North Baja system, collectively  
  GTNC Gas Transmission Northwest Corporation  
  GWh Gigawatt hours  
  INNERGY INNERGY Holdings S.A.  
  Iroquois Iroquois Gas Transmission System, L.P.  
  JRP Joint Review Panel  
  Keystone TransCanada Keystone Pipeline GP Ltd.  
  km Kilometres  
  LNG Liquefied natural gas  
  MD&A Management's Discussion and Analysis  
  MGP Mackenzie Gas Pipeline  
  Millennium Millennium Pipeline project  
  Mirant Mirant Corporation and certain of its subsidiaries  
  mmcf/d Million cubic feet per day  
  Moody's Moody's Investors Service  
  MW Megawatt  
  MWh Megawatt hour  
  NBV Net book value  
  NEB National Energy Board  
  Net earnings Net income from continuing operations  
  NEPOOL New England Power Pool  
  NGLs Natural gas liquids  
  Northern Border Northern Border Pipeline Company  
  NPA Northern Pipeline Act of Canada  
  OM&A Operating, maintenance and administration  
  OPA Ontario Power Authority  
  OSP Ocean State Power  
  Paiton Energy P.T. Paiton Energy Company  
  PG&E Pacific Gas & Electric Company  
  PipeLines LP TC PipeLines, LP  
  Portland Portland Natural Gas Transmission System  
  Portlands Energy Portlands Energy Centre L.P.  
  Power LP TransCanada Power, L.P.  
  PPA Power purchase arrangement  
  ROE Rate of return on common equity  
  S&P Standard & Poor's  
  SEC U.S. Securities and Exchange Commission  
  Shell Shell US Gas & Power LLC  
  TBO Transportation by Others  
  TCPL TransCanada PipeLines Limited  
  TCPM TransCanada Power Marketing Ltd.  
  TQM Trans Québec & Maritimes System  
  TransCanada or the Company TransCanada Corporation  
  TransGas TransGas de Occidente S.A.  
  Tuscarora Tuscarora Gas Transmission Company  
  U.S. United States  
  USGen USGen New England, Inc.  
  Ventures LP TransCanada Pipeline Ventures Limited Partnership  
  WCSB Western Canada Sedimentary Basin