| AFUDC |
Allowance for funds used during construction |
| AGIA |
Alaska Gasline Inducement Act |
| Alaska Pipeline Project |
A proposed natural gas pipeline extending from a new natural gas treatment plant at Prudhoe Bay, Alaska to Alberta |
| Alberta System |
A natural gas transmission system in Alberta |
| American Natural Resources (ANR) |
A natural gas transmission system extending from producing fields located primarily in Oklahoma, Texas, Louisiana and the Gulf of Mexico to markets located primarily in Wisconsin, Michigan, Illinois, Ohio and Indiana, and regulated underground natural gas storage facilities in Michigan |
| ANR Pipeline |
ANR Pipeline Company |
| APG |
Aboriginal Pipeline Group |
| AUC |
Alberta Utilities Commission |
| B.C. |
British Columbia |
| Bbl/d |
Barrels per day |
| Bcf |
Billion cubic feet |
| Bcf/d |
Billion cubic feet per day |
| Bear Creek |
A natural gas-fired cogeneration plant near Grande Prairie, Alberta |
| Bécancour |
A natural gas-fired cogeneration plant near Trois-Rivières, Québec |
| Bison |
A proposed pipeline from the Powder River Basin in Wyoming to the Northern Border system in North Dakota |
| BPC |
BPC Generation Infrastructure Trust |
| Broadwater |
A proposed offshore LNG project located in the New York waters of Long Island Sound |
| Bruce A |
A partnership interest in the nuclear power generation facilities of Bruce Power A L.P. |
| Bruce B |
A partnership interest in the nuclear power generation facilities of Bruce Power L.P |
| Bruce Power |
Bruce A and Bruce B, collectively |
| Calpine |
Calpine Corporation |
| Cameco |
Cameco Corporation |
| Canadian Mainline |
A natural gas transmission system extending from the Alberta/Saskatchewan border east into Québec |
| Cancarb |
A waste-heat fuelled power plant at the Cancarb thermal carbon black facility in Medicine Hat, Alberta |
| CAPLA |
Canadian Alliance of Pipeline Landowners' Associations |
| Carseland |
A natural gas-fired cogeneration plant located near Carseland, Alberta |
| Cartier Wind |
Six wind farms in Gaspé, Québec, three of which have been built |
| Chinook |
A proposed HVDC transmission project that will originate in Montana and terminate in Nevada |
| CICA |
Canadian Institute of Chartered Accountants |
| CO2 |
Carbon dioxide |
| Coolidge |
A simple-cycle, natural gas-fired peaking power generation station under development in Coolidge, Arizona |
| CrossAlta |
An underground natural gas storage facility near Crossfield, Alberta |
| DRP |
Dividend Reinvestment and Share Purchase Plan |
| Edson |
A natural gas storage facility near Edson, Alberta |
| FAS |
Financial Accounting Standard |
| FCM |
Forward Capacity Market |
| FERC |
U.S. Federal Energy Regulatory Commission |
| Foothills |
A natural gas transmission system extending from central Alberta to the B.C./U.S. border and to the Saskatchewan/U.S. border |
| Framework |
Regulatory Framework for Air Emissions |
| GAAP |
Generally accepted accounting principles |
| Gas Pacifico |
A natural gas transmission system extending from Loma de la Lata, Argentina to Concepción, Chile |
| GHG |
Greenhouse gas |
| GJ |
Gigajoule |
| Grandview |
A natural gas-fired cogeneration plant near Saint John, New Brunswick |
| Great Lakes |
A natural gas transmission system that connects to the Canadian Mainline and serves markets in Eastern Canada and the northeastern and midwestern U.S. |
| Gas Transmission Network (GTN) |
GTN System and North Baja, collectively |
| GTNC |
Gas Transmission Northwest Corporation |
| GTN System |
A natural gas transmission system extending from the B.C./Idaho border to the Oregon/California border, traversing Idaho, Washington and Oregon |
| GWh |
Gigawatt hours |
| Halton Hills |
A natural gas-fired, combined-cycle power plant near Toronto, Ontario |
| HS&E |
Health, Safety and Environment |
| HVDC |
High voltage direct current |
| IASB |
International Accounting Standards Board |
| IFRS |
International Financial Reporting Standards |
| INNERGY |
An industrial natural gas marketing company based in Concepción, Chile |
| Iroquois |
A natural gas transmission system that connects with the Canadian Mainline near Waddington, New York, and delivers natural gas to the northeastern U.S. |
| ISO |
International Organization of Standardization |
| ISO-NE |
Independent System Operator New England |
| Keystone |
A pipeline under construction that will transport crude oil from Hardisty, Alberta, to U.S. markets at Wood River and Patoka in Illinois, and to Cushing, Oklahoma |
| Keystone partnerships |
TransCanada Keystone Pipeline Limited Partnership and TransCanada Keystone Pipeline, LP, collectively |
| Kibby Wind |
A wind power project located in Kibby and Skinner Townships in northwestern Franklin County, Maine |
| km |
Kilometres |
| kV |
Kilovolt |
| LIBOR |
London Interbank Offered Rate |
| LNG |
Liquefied natural gas |
| MacKay River |
A natural gas-fired cogeneration plant located near Fort McMurray, Alberta |
| MD&A |
Management's Discussion and Analysis |
| Mackenzie Gas Pipeline (MGP) |
A proposed natural gas pipeline to be constructed from a point near Inuvik, Northwest Territories to the northern border of Alberta |
| 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 hours |
| NEB |
National Energy Board of Canada |
| Net earnings |
Net income from continuing operations |
| North Baja |
A natural gas transmission system extending from Arizona to the Baja California, Mexico/California border |
| Northern Border |
A natural gas transmission system extending from a point near Monchy, Saskatchewan, to the U.S. Midwest |
| NorthernLights |
A proposed HVDC electric transmission line running from central Alberta to a terminal in southern Alberta and interconnecting with the Pacific Northwest |
| NYISO |
New York Independent System Operator |
| OM&A |
Operating, maintenance and administration |
| OPA |
Ontario Power Authority |
| Ocean State Power (OSP) |
A natural gas-fired, combined-cycle plant in Burrillville, Rhode Island |
| Palomar |
A proposed pipeline extending from the GTN System to the Columbia River northwest of Portland |
| Pathfinder |
A proposed pipeline from Meeker, Colorado to the Northern Border system in North Dakota |
| PipeLines LP |
TC PipeLines, LP |
| PNGTS |
Portland Natural Gas Transmission System |
| Portland |
A natural gas transmission system that extends from a point near East Hereford, Québec to the northeastern U.S. |
| Portlands Energy |
A combined-cycle natural gas cogeneration plant near downtown Toronto, Ontario |
| PPA |
Power purchase arrangement |
| Ravenswood |
A natural gas and oil-fired generating facility consisting of multiple units employing steam turbine, combined cycle and combustion turbine technology located in Queens, New York |
| Redwater |
A natural gas-fired cogeneration plant located near Redwater, Alberta |
| RGGI |
Regional Greenhouse Gas Initiative |
| ROE |
Rate of return on common equity |
| Salt River Project |
Salt River Project Agricultural Improvement and Power District |
| SEC |
U.S. Securities and Exchange Commission |
| Sempra |
Sempra Pipelines and Storage |
| Sheerness |
A coal-fired power generating facility located near Hanna, Alberta |
| STEP 2008 |
Storage enhancement project |
| Sundance A |
A coal-fired power generating facility located near Wabamun, Alberta |
| Sundance B |
A coal-fired power generating facility located near Wabamun, Alberta |
| Sunstone |
A proposed pipeline from Wyoming to Stanfield, Oregon |
| Tamazunchale |
A natural gas transmission system in Mexico extending from Naranjos, Veracruz to Tamazunchale, San Luis Potosi |
| TC Hydro |
Hydroelectric generation assets located in New Hampshire, Vermont and Massachusetts |
| TCPL |
TransCanada PipeLines Limited |
| TCPM |
TransCanada Power Marketing Ltd. |
| Trans Québec & Maritimes (TQM) |
A natural gas transmission system that connects with the Canadian Mainline and transports natural gas in Québec, from Montreal to the Portland system and to Québec City |
| TransCanada or the Company |
TransCanada Corporation |
| TransGas |
A natural gas transmission system, extending from Mariquita in the central region of Colombia to Cali in the southwest region of Colombia |
| Tuscarora |
A natural gas transmission system extending from Malin, Oregon to Wadsworth, Nevada |
| U.S. |
United States |
| VaR |
Value-at-Risk methodology |
| Ventures LP |
Natural gas transmission systems in Alberta that supply natural gas to the oil sands region of northern Alberta and to a petrochemical complex at Joffre, Alberta |
| WCI |
Western Climate Initiative |
| WCSB |
Western Canada Sedimentary Basin |
| Williams |
Williams Gas Pipeline Company, LLC |
| Zephyr |
A proposed HVDC transmission project that will originate in Wyoming and terminate in Nevada |
