----

| Delaware                                                            |   | 52-2135448                                   |
|---------------------------------------------------------------------|--------|----------------------------------------------|
| (State      or other jurisdiction of incorporation or organization) |   | (I.R.S.      Employer Identification Number) |
|                                                                |   |                                         |

|  13710      FNB Parkway                  |   |            |
|-----------------------------------------------|--------|-----------------|
|  Omaha, Nebraska                         |   | 68154-5200      |
| (Address      of principal executive offices) |   | (Zip      code) |

|   |  877-290-2772                                              |   |
|--------|-----------------------------------------------------------------|--------|
|   |  (Registrant's      telephone number, including area code) |   |

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|                   |                                                                                                                 | Page      No. |
|------------------------|----------------------------------------------------------------------------------------------------------------------|---------------|
| TABLE      OF CONTENTS |
|                   |                                                                                                                 |          |
| PART      I            | FINANCIAL      INFORMATION                                                                                           |          |
|                   |                                                                                                                 |          |
|                   | Glossary                                                                                                             | 3             |
|                   |                                                                                                                 |          |
| Item      1.           | Financial      Statements                                                                                            |          |
|                   |                                                                                                                 |          |
|                   | Consolidated      Statement of Income – Three months ended March 31, 2009 and      2008         | 4             |
|                   | Consolidated      Statement of Comprehensive Income – Three months ended March 31, 2009 and      2008          | 4             |
|                   | Consolidated      Balance Sheet – March 31, 2009 and December 31, 2008                                         | 5             |
|                   | Consolidated      Statement of Cash Flows – Three months ended March 31, 2009 and      2008               | 6             |
|                   | Consolidated      Statement of Changes in Partners’ Equity – Three months ended March      31, 2009 | 7             |
|                   | Notes      to Consolidated Financial Statements                                                                      | 8             |
|                   |                                                                                                                 |          |
| Item      2.           | Management’s      Discussion and Analysis of Financial Condition and Results of      Operations                | 14            |
|                   |                                                                                                                 |          |
|                   | Results      of Operations of TC PipeLines                                                                           | 19            |
|                   | Liquidity      and Capital Resources of TC PipeLines                                                                 | 22            |
|                   | Liquidity      and Capital Resources of our Pipeline Systems                                                         | 23            |
|                   |                                                                                                                 |          |
| Item      3.           | Quantitative      and Qualitative Disclosures About Market Risk                                                      | 25            |
|                   |                                                                                                                 |          |
| Item      4.           | Controls      and Procedures                                                                                         | 27            |
|                   |                                                                                                                 |          |
| PART      II           | OTHER      INFORMATION                                                                                               |          |
|                   |                                                                                                                 |          |
| Item      1A.          | Risk      Factors                                                                                                    | 27            |
|                   |                                                                                                                 |          |
| Item      6.           | Exhibits                                                                                                             | 28            |

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| Collar      Agreement........................                        | Northern      Border's interest rate collar agreement                                                                                                                                                                                                 |
|----------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| EPA.......................................       | United      States Environmental Protection Agency                                                                                                                                                                                                    |
| FASB........................................         | Financial      Accounting Standards Board                                                                                                                                                                                                             |
| FERC........................................         | Federal      Energy Regulatory Commission                                                                                                                                                                                                             |
| GAAP......................................           | U.S.      generally accepted accounting principles                                                                                                                                                                                                    |
| GLGT..........................................                   | Great      Lakes Gas Transmission Limited Partnership                                                                                                                                                                                                 |
| Great      Lakes......................................                                       | Great      Lakes Gas Transmission Limited Partnership                                                                                                                                                                                            |
| IDRs......................................           | Incentive      Distribution Rights                                                                                                                                                                                                                    |
| LIBOR......................................          | London      Interbank Offered Rate                                                                                                                                                                                                                    |
| MMcf/d....................................               | Million      cubic feet per day                                                                                                                                                                                                                       |
| NBPC........................................             | Northern      Border Pipeline Company                                                                                                                                                                                                                 |
| Net      WCSB Flows to Markets..........                                                     | Net      of the supply of and demand for WCSB natural gas that is available for      transportation to downstream markets; where supply represents WCSB      production adjusted for injections into and withdrawals from WCSB      storage |
| Northern      Border.........................                        | Northern      Border Pipeline Company                                                                                                                                                                                                                 |
| Our      pipeline systems...................                                 | Great      Lakes, Northern Border and Tuscarora                                                                                                                                                                                                       |
| Partnership.................................                | TC      PipeLines, LP and its subsidiaries                                                                                                                                                                                                            |
| PipeLP      ...............................................                                  | TC      PipeLines, LP and its subsidiaries                                                                                                                                                                                                            |
| REX      East.................................  | Eastern      segment of the Rockies Express Pipeline                                                                                                                                                                                                  |
| REX      West................................        | Western      segment of the Rockies Express Pipeline                                                                                                                                                                                                  |
| Senior      Credit Facility...................                           | TC      PipeLine's revolving credit and term loan agreement                                                                                                                                                                                           |
| SFAS........................................         | Statement      of Financial Accounting Standards                                                                                                                                                                                                      |
| TC      PipeLines..........................             | TC      PipeLines, LP and its subsidiaries                                                                                                                                                                                                            |
| TGTC..................................................                                       | Tuscarora      Gas Transmission Company                                                                                                                                                                                                               |
| TransCanada.............................                         | TransCanada      Corporation and its subsidiaries                                                                                                                                                                                                     |
| Tuscarora.................................               | Tuscarora      Gas Transmission Company                                                                                                                                                                                                               |
| U.S...........................................   | United      States of America                                                                                                                                                                                                                         |
| WCSB......................................           | Western      Canada Sedimentary Basin                                                                                                                                                                                                                 |

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| (unaudited)                                                    |   | Three      months ended March 31, |   |
|----------------------------------------------------------------|--------|-----------------------------------|--------|
| (millions      of dollars except per common unit amounts)      |   | 2009                              |   |   | 2008 |   |
|                                                           |   |                              |   |   |   |   |
| Equity      income from investment in Great Lakes (Note 2)     |   |                              | 19.5   |   |   |   | 18.6 |   |
| Equity      income from investment in Northern Border (Note 3) |   |                              | 15.6   |   |   |   | 19.5 |   |
| Transmission      revenues                                     |   |                              | 8.4    |   |   |   | 6.9 |   |
| Operating      expenses                                        |   |                              | (2.6   | ) |   |   | (2.2 | ) |
| Depreciation                                                   |   |                              | (1.8   | ) |   |   | (1.6 | ) |
| Financial      charges, net and other                          |   |                              | (7.3   | ) |   |   | (7.6 | ) |
| Net      income                                                |   |                              | 31.8   |   |   |   | 33.6 |   |
|                                                           |   |                              |   |   |   |   |   |   |
| Net      income allocation                                     |   |                              |   |   |   |   |   |   |
| Common      units                                              |   |                              | 28.5   |   |   |   | 30.4 |   |
| General      partner                                           |   |                              | 3.3    |   |   |   | 3.2 |   |
|                                                           |   |                              | 31.8   |   |   |   | 33.6 |   |
|                                                           |   |                              |   |   |   |   |   |   |
| Net income per common      unit (Note 6)                       |   | $                                 | 0.82   |   |   | $ | 0.87 |   |
|                                                           |   |                              |   |   |   |   |   |   |
| Weighted average common units      outstanding (millions)      |   |                              | 34.9   |   |   |   | 34.9 |   |
|                                                           |   |                              |   |   |   |   |   |   |
| Common units outstanding, end      of the period (millions)    |   |                              | 34.9   |   |   |   | 34.9 |   |
|                                                           |   |                              |   |   |   |   |   |   |

| (unaudited)                                                                                       |   | Three      months ended March 31, |   |
|---------------------------------------------------------------------------------------------------|--------|-----------------------------------|--------|
| (millions      of dollars)                                                                        |   | 2009                              |   |   | 2008 |   |
|                                                                                              |   |                              |   |   |   |   |
| Net      income                                                                                   |   |                              | 31.8   |   |   |   | 33.6 |   |
| Other      comprehensive income/(loss)                                                            |   |                              |   |   |   |   |   |   |
|    Change      associated with hedging transactions (Note 9)                       |   |                              | 1.4    |   |   |   | (12.3 | ) |
|    Change      associated with hedging transactions of investees                   |   |                              | (0.1   | ) |   |   | (1.6 | ) |
|                                                                                              |   |                              | 1.3    |   |   |   | (13.9 | ) |
| Total      comprehensive income                                                                   |   |                              | 33.1   |   |   |   | 19.7 |   |
|                                                                                              |   |                              |   |   |   |   |   |   |
| The      accompanying notes are an integral part of these consolidated financial      statements. |   |                              |   |   |   |

----

| (unaudited)                                                                                       |   |                |    |   |                   |   |
|---------------------------------------------------------------------------------------------------|--------|---------------------|---------|--------|------------------------|--------|
| (millions      of dollars)                                                                        |   | March      31, 2009 |    |   | December      31, 2008 |   |
| ASSETS                                                                                            |   |                |    |   |                   |   |
| Current      Assets                                                                               |   |                |    |   |                   |   |
|      Cash      and cash equivalents                                      |   |                | 13.0    |   |                   |   | 8.4 |   |
|      Accounts      receivable and other                                  |   |                | 2.8     |   |                   |   | 3.4 |   |
|                                                                                              |   |                | 15.8    |   |                   |   | 11.8 |   |
| Investment      in Great Lakes (Note 2)                                                           |   |                | 711.5   |   |                   |   | 704.5 |   |
| Investment      in Northern Border (Note 3)                                                       |   |                | 510.5   |   |                   |   | 514.8 |   |
| Plant,      property and equipment (net of $70.3 accumulated                                      |   |                | 132.5   |   |                   |   | 134.2 |   |
|      depreciation,      2008 - $68.5)                                    |   |                |    |   |                   |   |   |   |
| Goodwill                                                                                          |   |                | 81.7    |   |                   |   | 81.7 |   |
| Other      assets                                                                                 |   |                | 1.4     |   |                   |   | 1.5 |   |
|                                                                                              |   |                | 1,453.4 |   |                   |   | 1,448.5 |   |
|                                                                                              |   |                |    |   |                   |   |   |   |
| LIABILITIES      AND PARTNERS' EQUITY                                                             |   |                |    |   |                   |   |   |   |
| Current      Liabilities                                                                          |   |                |    |   |                   |   |   |   |
|      Accounts      payable                                               |   |                | 2.2     |   |                   |   | 2.2 |   |
|      Accrued      interest                                               |   |                | 2.9     |   |                   |   | 2.1 |   |
|      Current      portion of long-term debt (Note 5)                     |   |                | 4.4     |   |                   |   | 4.4 |   |
|      Current      portion of fair value of derivative contracts (Note 9) |   |                | 12.0    |   |                   |   | 11.8 |   |
|                                                                                              |   |                | 21.5    |   |                   |   | 20.5 |   |
| Fair      value of derivative contracts and other (Note 9)                                        |   |                | 18.5    |   |                   |   | 20.0 |   |
| Long-term      debt (Note 5)                                                                      |   |                | 532.4   |   |                   |   | 532.4 |   |
|                                                                                              |   |                | 572.4   |   |                   |   | 572.9 |   |
| Partners'      Equity                                                                             |   |                |    |   |                   |   |   |   |
|      Common      units                                                   |   |                | 895.4   |   |                   |   | 891.4 |   |
|      General      partner                                                |   |                | 19.2    |   |                   |   | 19.1 |   |
|      Accumulated      other comprehensive loss                           |   |                | (33.6   | )      |                   |   | (34.9 | ) |
|                                                                                              |   |                | 881.0   |   |                   |   | 875.6 |   |
|                                                                                              |   |                | 1,453.4 |   |                   |   | 1,448.5 |   |
|                                                                                              |   |                |    |   |                   |   |   |   |
| Subsequent      events (Note 12)                                                                  |   |                |    |   |                   |   |   |   |
|                                                                                              |   |                |    |   |                   |   |   |   |
| The      accompanying notes are an integral part of these consolidated financial      statements. |   |                |    |   |                   |

----

| (unaudited)                                                                                       |   | Three      months ended March 31, |   |
|---------------------------------------------------------------------------------------------------|--------|-----------------------------------|--------|
| (millions      of dollars)                                                                        |   | 2009                              |   |   | 2008 |   |
|                                                                                              |   |                              |   |   |   |   |
| CASH      GENERATED FROM OPERATIONS                                                               |   |                              |   |   |   |   |
| Net      income                                                                                   |   |                              | 31.8   |   |   |   | 33.6 |   |
| Depreciation                                                                                      |   |                              | 1.8    |   |   |   | 1.6 |   |
| Amortization      of other assets                                                                 |   |                              | 0.1    |   |   |   | 0.1 |   |
| Equity      income in excess of distributions received from GreatLakes                            |   |                              | (7.0   | ) |   |   | (7.0 | ) |
| Increase      in long-term liabilities                                                            |   |                              | -      |   |   |   | 0.1 |   |
| Equity      allowance for funds used during construction                                          |   |                              | -      |   |   |   | (0.2 | ) |
| Decrease/(increase)      in operating working capital (Note 10)                                   |   |                              | 1.5    |   |   |   | (0.2 | ) |
|                                                                                              |   |                              | 28.2   |   |   |   | 28.0 |   |
|                                                                                              |   |                              |   |   |   |   |   |   |
| INVESTING      ACTIVITIES                                                                         |   |                              |   |   |   |   |   |   |
| Cumulative      distributions in excess of equity earnings:                                       |   |                              |   |   |   |   |   |   |
|      Northern      Border                                                |   |                              | 8.6    |   |   |   | 3.6 |   |
| Investment      in Northern Border (Note 3)                                                       |   |                              | (4.3   | ) |   |   | - |   |
| Capital      expenditures                                                                         |   |                              | (0.1   | ) |   |   | (4.5 | ) |
| (Increase)/decrease      in investing working capital (Note 10)                                   |   |                              | (0.1   | ) |   |   | 0.6 |   |
|                                                                                              |   |                              | 4.1    |   |   |   | (0.3 | ) |
|                                                                                              |   |                              |   |   |   |   |   |   |
| FINANCING      ACTIVITIES                                                                         |   |                              |   |   |   |   |   |   |
| Distributions      paid (Note 7)                                                                  |   |                              | (27.7  | ) |   |   | (25.6 | ) |
| Long-term      debt repaid (Note 5)                                                               |   |                              | -      |   |   |   | (8.0 | ) |
|                                                                                              |   |                              | (27.7  | ) |   |   | (33.6 | ) |
|                                                                                              |   |                              |   |   |   |   |   |   |
| Increase/(decrease)      in cash and cash equivalents                                             |   |                              | 4.6    |   |   |   | (5.9 | ) |
| Cash      and cash equivalents, beginning of period                                               |   |                              | 8.4    |   |   |   | 7.5 |   |
|                                                                                              |   |                              |   |   |   |   |   |   |
| Cash      and cash equivalents, end of period                                                     |   |                              | 13.0   |   |   |   | 1.6 |   |
|                                                                                              |   |                              |   |   |   |   |   |   |
| Interest      payments made                                                                       |   |                              | 3.2    |   |   |   | 7.0 |   |
|                                                                                              |   |                              |   |   |   |   |   |   |
| The      accompanying notes are an integral part of these consolidated financial      statements. |   |
|                                                                                              |   |                              |   |   |   |   |   |   |

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| (unaudited)                                                                                                                                                                                                                                                                                                                                                                                                                               |   | Common      Units |   |      | General      Partner |      | Accumulated      Other Comprehensive (Loss)/Income      (1) |      | Partners'      Equity |   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------|--------|-----------|----------------------|-----------|-------------------------------------------------------------|-----------|-----------------------|--------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   | (millions         |   | (millions |                 | (millions |                                                        | (millions |                  |   | (millions |   | (millions |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   | of      units)    |   |      | of      dollars)     |      | of      dollars)                                            |      | of      dollars)      |   |   | of      units) |   |   | of      dollars) |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |              |   |      |                 |      |                                                        |      |                  |   |   |   |   |   |   |   |   |   |
| Partners'      equity at December 31, 2008                                                                                                                                                                                                                                                                                                                                                                                                |   |              | 34.9   |      |                 |      | 891.4                                                       |      |                  |   | 19.1 |   |   |   | (34.9 | ) |   |   | 34.9 |   |   |   | 875.6 |   |
| Net      income                                                                                                                                                                                                                                                                                                                                                                                                                           |   |              | -      |      |                 |      | 28.5                                                        |      |                  |   | 3.3 |   |   |   | - |   |   |   | - |   |   |   | 31.8 |   |
| Distributions      paid                                                                                                                                                                                                                                                                                                                                                                                                                   |   |              | -      |      |                 |      | (24.5                                                       | )         |                  |   | (3.2 | ) |   |   | - |   |   |   | - |   |   |   | (27.7 | ) |
| Other      comprehensive income                                                                                                                                                                                                                                                                                                                                                                                                           |   |              | -      |      |                 |      | -                                                           |      |                  |   | - |   |   |   | 1.3 |   |   |   | - |   |   |   | 1.3 |   |
| Partners'      equity at March 31, 2009                                                                                                                                                                                                                                                                                                                                                                                                   |   |              | 34.9   |      |                 |      | 895.4                                                       |      |                  |   | 19.2 |   |   |   | (33.6 | ) |   |   | 34.9 |   |   |   | 881.0 |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |              |   |      |                 |      |                                                        |      |                  |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (1)      TC PipeLines, LP uses derivatives to assist in managing its exposure to      interest rate risk. Based on interest rates at March 31, 2009, the amount      of losses related to cash flow hedges reported in accumulated other      comprehensive income that will be reclassified to net income in the next      12 months is $12.0 million, which will be offset by a reduction to      interest expense of a similar amount. |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |              |   |      |                 |      |                                                        |      |                  |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| The      accompanying notes are an integral part of these consolidated financial      statements.                                                                                                                                                                                                                                                                                                                                         |   |              |   |      |                 |      |                                                        |      |                  |
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |              |   |      |                 |      |                                                        |      |                  |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |              |   |      |                 |      |                                                        |      |                  |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |

----

| Summarized      Consolidated Great Lakes Income Statement |   |                                    |   |   |   |   |
|-----------------------------------------------------------|--------|-----------------------------------------|--------|--------|--------|--------|
|                                                      |   |                                    |   |
| (unaudited)                                               |   |  Three      months ended March 31, |   |
| (millions      of dollars)                                |   | 2009                                    |   |   | 2008   |   |
| Transmission      revenues                                |   |                                    | 82.5   |   |   |   | 79.7 |   |
| Operating      expenses                                   |   |                                    | (16.0  | )      |   |   | (15.1 | ) |
| Depreciation                                              |   |                                    | (14.6  | )      |   |   | (14.6 | ) |
| Financial      charges, net and other                     |   |                                    | (8.2   | )      |   |   | (8.2 | ) |
| Michigan      business tax                                |   |                                    | (1.8   | )      |   |   | (1.7 | ) |
| Net      income                                           |   |                                    | 41.9   |   |   |   | 40.1 |   |
|                                                      |   |                                    |   |   |   |   |   |   |
|                                                      |   |                                    |   |   |   |   |   |   |

----

| Summarized      Consolidated Great Lakes Balance Sheet |   |           |    |   |              |   |
|--------------------------------------------------------|--------|----------------|---------|--------|-------------------|--------|
| (unaudited)                                            |   | March      31, |    |   | December      31, |   |
| (millions      of dollars)                             |   | 2009           |    |   | 2008              |   |
| Assets                                                 |   |           |    |   |              |   |
| Cash      and cash equivalents                         |   |           | 3.1     |   |              |   | 1.6 |   |
| Other      current assets                              |   |           | 93.0    |   |              |   | 80.2 |   |
| Plant,      property and equipment, net                |   |           | 909.8   |   |              |   | 923.4 |   |
|                                                   |   |           | 1,005.9 |   |              |   | 1,005.2 |   |
| Liabilities      and Partners' Equity                  |   |           |    |   |              |   |   |   |
| Current      liabilities                               |   |           | 37.4    |   |              |   | 43.0 |   |
| Deferred      credits                                  |   |           | 2.7     |   |              |   | 2.3 |   |
| Long-term      debt, including current maturities      |   |           | 421.0   |   |              |   | 430.0 |   |
| Partners'      capital                                 |   |           | 544.8   |   |              |   | 529.9 |   |
|                                                   |   |           | 1,005.9 |   |              |   | 1,005.2 |   |
|                                                   |   |           |    |   |              |   |   |   |

| Summarized Northern Border      Income Statement |   |                              |   |   |   |   |
|--------------------------------------------------|--------|-----------------------------------|--------|--------|--------|--------|
| (unaudited)                                      |   | Three      months ended March 31, |   |
| (millions      of dollars)                       |   | 2009                              |   |   | 2008   |   |
| Transmission      revenues                       |   |                              | 74.5   |   |   |   | 83.8 |   |
| Operating      expenses                          |   |                              | (18.5  | )      |   |   | (19.4 | ) |
| Depreciation                                     |   |                              | (15.3  | )      |   |   | (15.2 | ) |
| Financial      charges, net and other            |   |                              | (9.1   | )      |   |   | (9.7 | ) |
| Net      income                                  |   |                              | 31.6   |   |   |   | 39.5 |   |
|                                             |   |                              |   |   |   |   |   |   |
|                                             |   |                              |   |   |   |   |   |   |

| Summarized      Northern Border Balance Sheet                           |   |           |    |   |              |   |
|-------------------------------------------------------------------------|--------|----------------|---------|--------|-------------------|--------|
| (unaudited)                                                             |   | March      31, |    |   | December      31, |   |
| (millions      of dollars)                                              |   | 2009           |    |   | 2008              |   |
| Assets                                                                  |   |           |    |   |              |   |
| Cash      and cash equivalents                                          |   |           | 23.1    |   |              |   | 21.6 |   |
| Other      current assets                                               |   |           | 30.2    |   |              |   | 39.1 |   |
| Plant,      property and equipment, net                                 |   |           | 1,379.8 |   |              |   | 1,390.8 |   |
| Other      assets                                                       |   |           | 24.9    |   |              |   | 24.5 |   |
|                                                                    |   |           | 1,458.0 |   |              |   | 1,476.0 |   |
| Liabilities      and Partners' Equity                                   |   |           |    |   |              |   |   |   |
| Current      liabilities                                                |   |           | 44.1    |   |              |   | 48.7 |   |
| Deferred      credits and other                                         |   |           | 11.1    |   |              |   | 11.2 |   |
| Long-term      debt, including current maturities                       |   |           | 625.5   |   |              |   | 630.4 |   |
| Partners'      equity                                                   |   |           |    |   |              |   |   |   |
|      Partners'      capital                    |   |           | 783.2   |   |              |   | 791.4 |   |
|      Accumulated      other comprehensive loss |   |           | (5.9    | )      |              |   | (5.7 | ) |
|                                                                    |   |           | 1,458.0 |   |              |   | 1,476.0 |   |
|                                                                    |   |           |    |   |              |   |   |   |

----

| Summarized      Tuscarora Income Statement |   |                              |   |   |   |   |
|--------------------------------------------|--------|-----------------------------------|--------|--------|--------|--------|
| (unaudited)                                |   | Three      months ended March 31, |   |
| (millions      of dollars)                 |   | 2009                              |   |   | 2008   |   |
| Transmission      revenues                 |   |                              | 8.4    |   |   |   | 6.9 |   |
| Operating      expenses                    |   |                              | (1.4   | )      |   |   | (1.2 | ) |
| Depreciation                               |   |                              | (1.8   | )      |   |   | (1.6 | ) |
| Financial      charges, net and other      |   |                              | (1.1   | )      |   |   | (0.9 | ) |
| Net      income                            |   |                              | 4.1    |   |   |   | 3.2 |   |
|                                       |   |                              |   |   |   |   |   |   |
|                                       |   |                              |   |   |   |   |   |   |

| Summarized      Tuscarora Balance Sheet           |   |           |   |   |              |   |
|---------------------------------------------------|--------|----------------|--------|--------|-------------------|--------|
| (unaudited)                                       |   | March      31, |   |   | December      31, |   |
| (millions      of dollars)                        |   | 2009           |   |   | 2008              |   |
| Assets                                            |   |           |   |   |              |   |
| Other      current assets                         |   |           | 10.0   |   |              |   | 3.1 |   |
| Plant,      property and equipment, net           |   |           | 132.5  |   |              |   | 134.2 |   |
| Other      assets                                 |   |           | 0.3    |   |              |   | 0.3 |   |
|                                              |   |           | 142.8  |   |              |   | 137.6 |   |
| Liabilities      and Partners' Equity             |   |           |   |   |              |   |   |   |
| Current      liabilities                          |   |           | 3.1    |   |              |   | 2.0 |   |
| Long-term      debt, including current maturities |   |           | 61.8   |   |              |   | 61.8 |   |
| Partners'      capital                            |   |           | 77.9   |   |              |   | 73.8 |   |
|                                              |   |           | 142.8  |   |              |   | 137.6 |   |
|                                              |   |           |   |   |              |   |   |   |
|                                              |   |           |   |   |              |   |   |   |

| Summarized      Tuscarora Cash Flow Statement       |   |                              |   |   |   |   |
|-----------------------------------------------------|--------|-----------------------------------|--------|--------|--------|--------|
| (unaudited)                                         |   | Three      months ended March 31, |   |
| (millions      of dollars)                          |   | 2009                              |   |   | 2008   |   |
| Cash      flows provided by operating activities    |   |                              | 7.2    |   |   |   | 6.0 |   |
| Cash      flows used in investing activities        |   |                              | (0.2   | )      |   |   | (4.0 | ) |
| Cash      flows used in financing activities        |   |                              | (7.0   | )      |   |   | (8.1 | ) |
| Decrease      in cash and cash equivalents          |   |                              | -      |   |   |   | (6.1 | ) |
| Cash      and cash equivalents, beginning of period |   |                              | -      |   |   |   | 6.1 |   |
| Cash      and and cash equivalents, end of period   |   |                              | -      |   |   |   | - |   |
|                                                |   |                              |   |   |   |   |   |   |
|                                                |   |                              |   |   |   |   |   |   |

| (unaudited)                               |   | March      31, |   |   | December      31, |   |
|-------------------------------------------|--------|----------------|--------|--------|-------------------|--------|
| (millions      of dollars)                |   | 2009           |   |   | 2008              |   |
|                                      |   |           |   |   |              |   |
| Senior      Credit Facility               |   |           | 475.0  |   |              |   | 475.0 |   |
| 7.13%      Series A Senior Notes due 2010 |   |           | 51.3   |   |              |   | 51.3 |   |
| 7.99%      Series B Senior Notes due 2010 |   |           | 5.0    |   |              |   | 5.0 |   |
| 6.89%      Series C Senior Notes due 2012 |   |           | 5.5    |   |              |   | 5.5 |   |
|                                      |   |           | 536.8  |   |              |   | 536.8 |   |
|                                      |   |           |   |   |              |   |   |   |

----

| (unaudited)                |                                                                                                                                                                                                                                                                                                                                                                                          |
|----------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (millions      of dollars) |                                                                                                                                                                                                                                                                                                                                                                                          |
| 2009                       |                                                                4.4 |
| 2010                       |                                                              53.5            |
| 2011                       |                                                            475.8                       |
| 2012                       |                                                                3.1 |
|                       |                                                            536.8                       |

| (unaudited)                                                     |   | Three      months ended March 31, |   |
|-----------------------------------------------------------------|--------|----------------------------------------|--------|
| (millions      of dollars except per unit)                      |   | 2009                                   |   |   | 2008 |   |
| Net      income                                                 |   |                                   | 31.8   |   |   |   | 33.6 |   |
| Net      income allocated to general partner                    |   |                                   |   |   |   |   |   |   |
|    General      partner interest                 |   |                                   | (0.6   | ) |   |   | (0.7 | ) |
|    Incentive      distribution income allocation |   |                                   | (2.7   | ) |   |   | (2.5 | ) |
|                                                            |   |                                   | (3.3   | ) |   |   | (3.2 | ) |
| Net      income allocable to common units                       |   |                                   | 28.5   |   |   |   | 30.4 |   |
| Weighted      average common units outstanding (millions)       |   |                                   | 34.9   |   |   |   | 34.9 |   |
| Net      income per common unit                                 |   | $                                      | 0.82   |   |   | $ | 0.87 |   |
|                                                            |   |                                   |   |   |   |   |   |   |

----

| (unaudited)                                           |   | Three      months ended March 31, |   |
|-------------------------------------------------------|--------|----------------------------------------|--------|
| (millions      of dollars)                            |   | 2009                                   |   |   | 2008 |   |
|                                                  |   |                                   |   |   |   |   |
| Costs      charged by TransCanada and its affiliates: |   |                                   |   |   |   |   |
|      Great      Lakes        |   |                                   | 7.3    |   |   |   | 7.3 |   |
|      Northern      Border    |   |                                   | 6.3    |   |   |   | 6.8 |   |
|      Tuscarora               |   |                                   | 0.7    |   |   |   | 1.1 |   |
| Impact      on the Partnership's net income:          |   |                                   |   |   |   |   |   |   |
|      Great      Lakes        |   |                                   | 3.2    |   |   |   | 3.4 |   |
|      Northern      Border    |   |                                   | 2.9    |   |   |   | 3.3 |   |
|      Tuscarora               |   |                                   | 0.7    |   |   |   | 0.7 |   |
|                                                  |   |                                   |   |   |   |   |   |   |
|                                                  |   |                                   |   |   |   |   |   |   |
| (unaudited)                                           |   | March      31,                         |   |   | December      31, |   |
| (millions      of dollars)                            |   | 2009                                   |   |   | 2008 |   |
|                                                  |   |                                   |   |   |   |   |   |   |
| Amount      owed to TransCanada and its affiliates:   |   |                                   |   |   |   |   |   |   |
|      Great      Lakes        |   |                                   | 3.4    |   |   |   | 4.5 |   |
|      Northern      Border    |   |                                   | 2.8    |   |   |   | 2.8 |   |
|      Tuscarora               |   |                                   | 0.9    |   |   |   | 0.8 |   |
|                                                  |   |                                   |   |   |   |   |   |   |

----

| (unaudited)                                           |   | Three      months ended March 31, |   |
|-------------------------------------------------------|--------|-----------------------------------|--------|
| (millions      of dollars)                            |   | 2009                              |   |   | 2008 |   |
|                                                  |   |                              |   |   |   |   |
| Decrease      in accounts receivable and other        |   |                              | 0.6    |   |   |   | 0.7 |   |
| Decrease      in bank indebtedness                    |   |                              | -      |   |   |   | (1.4 | ) |
| Increase      in accounts payable                     |   |                              | -      |   |   |   | 0.5 |   |
| Increase      in accrued interest                     |   |                              | 0.8    |   |   |   | 0.6 |   |
|                                                  |   |                              | 1.4    |   |   |   | 0.4 |   |
| (Increase)/decrease      in investing working capital |   |                              | (0.1   | ) |   |   | 0.6 |   |
| Decrease/(increase)      in operating working capital |   |                              | 1.5    |   |   |   | (0.2 | ) |
|                                                  |   |                              |   |   |   |   |   |   |

----

| ·   | the      ability of Great Lakes and Northern Border to continue to make      distributions at their currentlevels; |
|--------------------|--------------------------------------------------------------------------------------------------------------------|

| ·   | the      impact of unsold capacity on Great Lakes and Northern Border being greater      or less than expected; |
|--------------------|-----------------------------------------------------------------------------------------------------------------|

| ·   | competitive      conditions in our industry and the ability of our pipeline systems to      market pipeline capacity on favorable terms, which is affected      by: |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | future      demand for and prices of naturalgas; |
|---------------|--------------------------------------------------|

| o   | level      of natural gas basis differentials; |
|---------------|------------------------------------------------|

| o   | competitive      conditions in the overall natural gas and electricity    markets; |
|---------------|------------------------------------------------------------------------------------|

| o   | availability      of supplies of Canadian and United States (U.S.) natural gas,      including newly discovered natural gas developments such as the Horn      River and Montney shale gas developments in Western Canada, U.S. Rockies      and U.S. Mid-Continent shale gas developments, and the Marcellus shale gas      developments; |
|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | availability      of additional storage capacity and current storage  levels; |
|---------------|-------------------------------------------------------------------------------|

| o   | level      of liquefied natural gas imports; |
|---------------|----------------------------------------------|

| o   | weather      conditions that impact supply anddemand; |
|---------------|-------------------------------------------------------|

| o   | ability      of shippers to meet credit worthiness requirements;  and |
|---------------|-----------------------------------------------------------------------|

| o   | competitive      developments by Canadian and U.S. natural gas transmission      companies; |
|---------------|---------------------------------------------------------------------------------------------|

| ·   | changes      in relative cost structures of natural gas producing basins, such as      changes in royalty programs, that may prejudice the development of the      Western Canada Sedimentary Basin(WCSB); |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      decision by other pipeline companies to advance projects which will affect      our pipeline systems and the regulatory, financing and construction risks      related to construction of interstate natural gas    pipelines; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | performance      of contractual obligations by customers of our pipeline      systems; |
|--------------------|----------------------------------------------------------------------------------------|

| ·   | the      imposition of entity level taxation by states on    partnerships; |
|--------------------|----------------------------------------------------------------------------|

| ·   | operating      hazards, natural disasters, weather-related delays, casualty losses and      other matters beyond our control; |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      impact of current and future laws, rulings and governmental regulations,      particularly Federal Energy Regulatory Commission (FERC) regulations, and      proposed and pending legislation by Congress and the Environmental      Protection Agency (EPA) related to green house gas emissions on us and our      pipeline systems; |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | our      ability to control operating costs;and |
|--------------------|-------------------------------------------------|

| ·   | the      severity and length of the current economic downturn, which      impacts: |
|--------------------|------------------------------------------------------------------------------------|

| o   | the      debt and equity capital markets and our ability to access these      markets; |
|---------------|----------------------------------------------------------------------------------------|

| o   | the      overall demand for natural gas by end users;and |
|---------------|----------------------------------------------------------|

| o   | natural      gas prices |
|---------------|-------------------------|

----

----

----

----

----

----

| The      shaded areas in the tables below disclose the results from Great Lakes and      Northern Border, representing 100 per cent of each entity's operations for      the given period.                                                                                                                         |   |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (unaudited)                                                                                                                                                                                                                                                                                                        |   | For      the three months ended March 31, 2009 |   |
| (millions      of dollars)                                                                                                                                                                                                                                                                                         |   | PipeLP |   |   | TGTC |   |   | Other |   |   | GLGT |   |   | NBPC(1) |   |
| Transmission      revenues                                                                                                                                                                                                                                                                                         |   |   | 8.4 |   |   |   | 8.4 |   |   |   | - |   |   |   | 82.5 |   |   |   | 74.5 |   |
| Operating      expenses                                                                                                                                                                                                                                                                                            |   |   | (2.6 | ) |   |   | (1.4 | ) |   |   | (1.2 | ) |   |   | (16.0 | ) |   |   | (18.5 | ) |
|                                                                                                                                                                                                                                                                                                               |   |   | 5.8 |   |   |   | 7.0 |   |   |   | (1.2 | ) |   |   | 66.5 |   |   |   | 56.0 |   |
| Depreciation                                                                                                                                                                                                                                                                                                       |   |   | (1.8 | ) |   |   | (1.8 | ) |   |   | - |   |   |   | (14.6 | ) |   |   | (15.3 | ) |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Financial      charges, net and other                                                                                                                                                                                                                                                                              |   |   | (7.3 | ) |   |   | (1.1 | ) |   |   | (6.2 | ) |   |   | (8.2 | ) |   |   | (9.1 | ) |
| Michigan      business tax                                                                                                                                                                                                                                                                                         |   |   | - |   |   |   | - |   |   |   | - |   |   |   | (1.8 | ) |   |   | - |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 41.9 |   |   |   | 31.6 |   |
| Equity      income                                                                                                                                                                                                                                                                                                 |   |   | 35.1 |   |   |   | - |   |   |   | - |   |   |   | 19.5 |   |   |   | 15.6 |   |
| Net      income                                                                                                                                                                                                                                                                                                    |   |   | 31.8 |   |   |   | 4.1 |   |   |   | (7.4 | ) |   |   | 19.5 |   |   |   | 15.6 |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (unaudited)                                                                                                                                                                                                                                                                                                        |   | For      the three months ended March 31, 2008 |   |
| (millions      of dollars)                                                                                                                                                                                                                                                                                         |   | PipeLP |   |   | TGTC |   |   | Other |   |   | GLGT |   |   | NBPC(1) |   |
| Transmission      revenues                                                                                                                                                                                                                                                                                         |   |   | 6.9 |   |   |   | 6.9 |   |   |   | - |   |   |   | 79.7 |   |   |   | 83.8 |   |
| Operating      expenses                                                                                                                                                                                                                                                                                            |   |   | (2.2 | ) |   |   | (1.2 | ) |   |   | (1.0 | ) |   |   | (15.1 | ) |   |   | (19.4 | ) |
|                                                                                                                                                                                                                                                                                                               |   |   | 4.7 |   |   |   | 5.7 |   |   |   | (1.0 | ) |   |   | 64.6 |   |   |   | 64.4 |   |
| Depreciation                                                                                                                                                                                                                                                                                                       |   |   | (1.6 | ) |   |   | (1.6 | ) |   |   | - |   |   |   | (14.6 | ) |   |   | (15.2 | ) |
| Financial      charges, net and other                                                                                                                                                                                                                                                                              |   |   | (7.6 | ) |   |   | (0.9 | ) |   |   | (6.7 | ) |   |   | (8.2 | ) |   |   | (9.7 | ) |
| Michigan      business tax                                                                                                                                                                                                                                                                                         |   |   | - |   |   |   | - |   |   |   | - |   |   |   | (1.7 | ) |   |   | - |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 40.1 |   |   |   | 39.5 |   |
| Equity      income                                                                                                                                                                                                                                                                                                 |   |   | 38.1 |   |   |   | - |   |   |   | - |   |   |   | 18.6 |   |   |   | 19.5 |   |
| Net      income                                                                                                                                                                                                                                                                                                    |   |   | 33.6 |   |   |   | 3.2 |   |   |   | (7.7 | ) |   |   | 18.6 |   |   |   | 19.5 |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (1)      TC PipeLines owns a 50 per cent general partner interest in Northern      Border. Equity income from Northern Border includes amortization of a      $10.0 million transaction fee paid to the operator of Northern Border at      the time of the additional 20 per cent acquisition in April      2006. |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |

----

| (unaudited)                                                  |   | Three      months ended March 31, |   |
|--------------------------------------------------------------|--------|-----------------------------------|--------|
| (millions      of dollars except per common unit amounts)    |   | 2009                              |   |   | 2008 |   |
| Net      Income                                              |   |                              | 31.8   |   |   |   | 33.6 |   |
| Add:                                                         |   |                              |   |   |   |   |   |   |
| Cash      flows provided by Tuscarora's operating activities |   |                              | 7.2    |   |   |   | 6.0 |   |
| Cash      distributions from Great Lakes (1)            |   |                              | 12.5   |   |   |   | 11.6 |   |
| Cash      distributions from Northern Border (1)             |   |                              | 24.2   |   |   |   | 23.1 |   |
|                                                         |   |                              | 43.9   |   |   |   | 40.7 |   |
| Less:                                                        |   |                              |   |   |   |   |   |   |
| Tuscarora's      net income                                  |   |                              | (4.1   | ) |   |   | (3.2 | ) |
| Equity      income from investment in Great Lakes            |   |                              | (19.5  | ) |   |   | (18.6 | ) |
| Equity      income from investment in Northern Border        |   |                              | (15.6  | ) |   |   | (19.5 | ) |
|                                                         |   |                              | (39.2  | ) |   |   | (41.3 | ) |
| Partnership      cash flows                                  |   |                              | 36.5   |   |   |   | 33.0 |   |
| Partnership      cash flows allocated to general partner (2) |   |                              | (3.2   | ) |   |   | (3.0 | ) |
| Partnership      cash flows allocated to common units        |   |                              | 33.3   |   |   |   | 30.0 |   |
| Cash      distributions declared                             |   |                              | (27.7  | ) |   |   | (27.4 | ) |
| Cash      distributions declared per common unit (3)         |   | $                                 | 0.705  |   |   | $ | 0.700 |   |
| Cash      distributions paid                                 |   |                              | (27.7  | ) |   |   | (25.6 | ) |
| Cash      distributions paid per common unit (3)             |   | $                                 | 0.705  |   |   | $ | 0.665 |   |
| Weighted      average common units outstanding (millions)    |   |                              | 34.9   |   |   |   | 34.9 |   |
|                                                         |   |                              |   |   |   |   |   |   |

| (1)      In accordance with the cash distribution policies of the respective      pipeline assets, cash distributions from Great Lakes and Northern Border      are based on their respective prior quarter financial    results.                                                                                                                                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (2)      Partnership cash flows allocated to general partner represents the cash      distributions declared to the general partner with respect to its two per      cent interest plus an amount equal to incentive distributions. Previously,      Partnership cash flows allocated to general partner were based on the cash      distributions paid to the general partner during the quarter; however,      this has been changed to align with the requirements of EITF 07-4. As a      result, Partnership cash flows allocated to general partner in first      quarter of 2008 increased from $2.4 million to $3.0    million. |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (3)      Cash distributions declared per common unit and cash distributions paid      per common unit are computed by dividing cash distributions, after the      deduction of the general partner's allocation, by the number of common      units outstanding. The general partner's allocation is computed based upon      the general partner's two per cent interest plus an amount equal to      incentive distributions.                                                                                                                                                                                                         |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |   |   |   |   |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                | Payments      Due by Period                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------|
| (unaudited)                                                                     (millions      of dollars) |  Total                                                                                                                             |   |  Less      Than 1 Year |  Long-term      Portion |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                    |   |   |   |   |
| Senior      Credit Facility due 2011                                                                                                                                                                                                                                                                                                                                                                                                                                |                   475.0                       |   |                          - |   |                   475.0 |
| 7.13%      Series A Senior Notes due 2010                                                                                                                                                                                                                                                                                                                                                                                                                           |                     51.3            |   |                       3.1 |   |                     48.2 |
| 7.99%      Series B Senior Notes due 2010                                                                                                                                                                                                                                                                                                                                                                                                                           |                       5.0 |   |                       0.5 |   |                       4.5 |
| 6.89%      Series C Senior Notes due 2012                                                                                                                                                                                                                                                                                                                                                                                                                           |                       5.5 |   |                       0.8 |   |                       4.7 |
| Total                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                   536.8                       |   |                       4.4 |   |                   532.4 |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                    |   |   |   |   |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | Payments      Due by Period                                                                                                  |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------|
| (unaudited)                                                                      (millions      of dollars) |  Total                                                                                                                  |   |  Less      than 1 year |   |  Long-term      Portion |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                         |   |   |   |   |
| 8.74%      series Senior Notes due 2007 to 2011                                                                                                                                                                                                                                                                                                                                                                                                                           |                     30.0 |   |                     10.0 |   |                     20.0 |
| 6.73%      series Senior Notes due 2009 to 2018                                                                                                                                                                                                                                                                                                                                                                                                                           |                     81.0 |   |                       9.0 |   |                     72.0 |
| 9.09%      series Senior Notes due 2012 to 2021                                                                                                                                                                                                                                                                                                                                                                                                                           |                   100.0            |   |                          - |   |                   100.0 |
| 6.95%      series Senior Notes due 2019 to 2028                                                                                                                                                                                                                                                                                                                                                                                                                           |                   110.0            |   |                          - |   |                   110.0 |
| 8.08%      series Senior Notes due 2021 to 2030                                                                                                                                                                                                                                                                                                                                                                                                                           |                   100.0            |   |                          - |   |                   100.0 |
| Total                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                   421.0            |   |                     19.0 |   |                   402.0 |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                         |   |   |   |   |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | Payments      Due by Period                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------|
| (unaudited)                                                                      (millions      of dollars) |  Total                                                                                                       |   |  Less      than 1 year |   |  Long-term      Portion |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                              |   |   |   |   |
| 7.75%      senior notes due 2009                                                                                                                                                                                                                                                                                                                                                                                                                                          |                   200.0 |   |                   200.0 |   |                          - |
| 7.50%      senior notes due 2021                                                                                                                                                                                                                                                                                                                                                                                                                                          |                   250.0 |   |                          - |   |                   250.0 |
| $250      million credit agreement due 2012 (a)                                                                                                                                                                                                                                                                                                                                                                                                                           |                   176.0 |   |                          - |   |                   176.0 |
| Total                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                   626.0 |   |                   200.0 |   |                   426.0 |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                              |   |   |   |   |
| (a)      Northern Border is required to pay a facility fee of 0.05% on the      principal commitment amount of its credit agreement.                                                                                                                                                                                                                                                                                                                                      |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                              |   |   |   |   |

----

| ·   | Swaps      – contractual agreements between two parties to exchange streams of      payments over time according to specified terms. The Partnership and our      pipeline systems enter into interest rate swaps to mitigate the impact of      changes in interest rates. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Options      – contractual agreements to convey the right, but not the obligation, for      the purchaser to buy or sell a specific amount of a financial instrument      at a fixed price, either at a fixed date or at any time within a specified      period. The Partnership and our pipeline systems enter into option      agreements to mitigate the impact of changes in interest      rates. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

----

| 10.1 | Market      Center Service Agreement MC11987 between Great Lakes Gas Transmission      Limited Partnership and TransCanada Gas Storage USA Inc., dated February      27, 2009. |
|------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.2 | Transportation      Service Agreement IT11986 between Great Lakes Gas Transmission Limited      Partnership and TransCanada Gas Storage USA Inc., dated February 27,      2009. |
|------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 31.1 | Certification      of Principal Executive Officer pursuant to Section 302 of the      Sarbanes-Oxley Actof  2002. |
|------|-----------------------------------------------------------------------------------------------------------------------------|

| 31.2 | Certification      of Principal Financial Officer pursuant to Section 302 of the      Sarbanes-Oxley Act of 2002. |
|------|-------------------------------------------------------------------------------------------------------------------|

| 32.1 | Certification      of Principal Executive Officer pursuant to Section 906 of the      Sarbanes-Oxley Act of 2002. |
|------|-------------------------------------------------------------------------------------------------------------------|

| 32.2   | Certification      of Principal Financial Officer pursuant to Section 906 of the      Sarbanes-Oxley Act of 2002.             |
|------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 99.1 | Consolidated      Balance Sheets of TC PipeLines GP, Inc. as of December 31, 2008 and      2007.          |
|------|--------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | TC      PipeLines, LP                       |
|--------|---------------------------------------------|
|   | (a      Delaware Limited Partnership)  |
|   | By:                                         | TC      PipeLines GP, Inc., its general partner  |
| Date:  | April      30, 2009                         | By: | /s/  Russell      K. Girling Russell      K. GirlingChairman,      Chief Executive Officer and DirectorTC      PipeLines GP, Inc. (Principal Executive Officer)  |
| Date:  | April      30, 2009                         | By: | /s/  Amy W.      LeongAmy      W. LeongControllerTC      PipeLines GP, Inc. (Principal FinancialOfficer) |

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