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

|  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 and six months ended June 30, 2008 and      2007                    | 4             |
|                   | Consolidated      Statement of Comprehensive Income – Three and six months ended June      30, 2008      and 2007 | 4             |
|                   | Consolidated      Balance Sheet – June 30, 2008 and December 31, 2007                                             | 5             |
|                   | Consolidated      Statement of Cash Flows – Six months ended June 30, 2008 and      2007                     | 6             |
|                   | Consolidated      Statement of Changes in Partners’ Equity – Six months ended June 30,      2008            | 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                                                                                   | 18            |
|                   | Liquidity      and Capital Resources of TC PipeLines                                                                         | 23            |
|                   | Liquidity      and Capital Resources of our Pipeline Systems                                                                 | 24            |
|                   |                                                                                                                         |          |
| Item      3.           | Quantitative      and Qualitative Disclosures About Market Risk                                                              | 26            |
|                   |                                                                                                                         |          |
| Item      4.           | Controls      and Procedures                                                                                                 | 27            |
|                   |                                                                                                                         |          |
| PART      II           | OTHER      INFORMATION                                                                                                       |          |
|                   |                                                                                                                         |          |
| Item      1A.          | Risk      Factors                                                                                                            | 28            |
|                   |                                                                                                                         |          |
| Item      6.           | Exhibits                                                                                                                     | 30            |

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| ANR  ……………………………...... | ANR      Pipeline Company                             |
|----------------------------------------------------------------------------------------------------|-------------------------------------------------------|
| Bcf/d……………………………......           | Billion      cubic feet per day                       |
| Bison……………………………......      | Bison      Pipeline Project                           |
| DCF……………………………........           | Discounted      cash flow                             |
| Dth/d……………………………......           | Dekatherms      per day                               |
| FASB…………………………..........               | Financial      Accounting Standards Board             |
| FERC…………………………..........               | Federal      Energy Regulatory Commission             |
| GAAP…………………………........                 | U.S.      generally accepted accounting principles    |
| Great      Lakes……………………........                   | Great      Lakes Gas Transmission Limited Partnership |
| GTN……………………………........           | Gas      Transmission Northwest Corporation           |
| LIBOR…………………………........                | London      Interbank Offered Rate                    |
| MLP……………………………........           | Master      Limited Partnership                       |
| MMcf/d……………………….........                     | Million      cubic feet per day                       |
| NOPR………………………….........                | Notice      of Proposed Rulemaking                    |
| Northern      Border……………….......                              | Northern      Border Pipeline Company                 |
| Our      pipeline systems………….......                                       | Great      Lakes, Northern Border and Tuscarora       |
| Partnership…………………............                      | TC      PipeLines, LP and its subsidiaries            |
| REX      East…………………………...        | Eastern      segment of the Rockies Express Pipeline  |
| REX      West…………………………..              | Western      segment of the Rockies Express Pipeline  |
| ROE……………………………........           | Return      on equity                                 |
| SEC…………………………….........          | Securities      and Exchange Commission               |
| SFAS…………………………..........               | Statement      of Financial Accounting Standards      |
| TC      Pipelines………………………..            | TC      PipeLines, LP and its subsidiaries            |
| TCNB………………………….........                | TransCanada      Northern Border Inc.                 |
| 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 June 30, |   | Six      months ended June 30, |   |
|----------------------------------------------------------------|--------|---------------------------------------|--------|-------------------------------------|--------|
| (millions      of dollars except per common unit amounts)      |   | 2008                                  |   |                                | 2007   |   |   | 2008 |   |   | 2007 |   |
|                                                           |   |                                  |   |                                |   |   |   |   |   |   |   |   |
| Equity      income from investment in Great Lakes (Note 2)     |   |                                  | 13.8   |                                |   |   | 13.1 |   |   |   | 32.4 |   |   |   | 20.1 |   |
| Equity      income from investment in Northern Border (Note 3) |   |                                  | 8.7    |                                |   |   | 10.3 |   |   |   | 28.2 |   |   |   | 28.1 |   |
| Transmission      revenues                                     |   |                                  | 8.2    |                                |   |   | 6.7 |   |   |   | 15.1 |   |   |   | 13.6 |   |
| Operating      expenses                                        |   |                                  | (2.3   | )                                   |   |   | (2.2 | ) |   |   | (4.5 | ) |   |   | (4.2 | ) |
| Depreciation                                                   |   |                                  | (1.7   | )                                   |   |   | (1.5 | ) |   |   | (3.3 | ) |   |   | (3.1 | ) |
| Financial      charges, net and other                          |   |                                  | (7.5   | )                                   |   |   | (8.7 | ) |   |   | (15.1 | ) |   |   | (16.8 | ) |
| Net      income                                                |   |                                  | 19.2   |                                |   |   | 17.7 |   |   |   | 52.8 |   |   |   | 37.7 |   |
|                                                           |   |                                  |   |                                |   |   |   |   |   |   |   |   |   |   |   |   |
| Net      income allocation                                     |   |                                  |   |                                |   |   |   |   |   |   |   |   |   |   |   |   |
| Common      units                                              |   |                                  | 16.4   |                                |   |   | 15.6 |   |   |   | 47.4 |   |   |   | 34.6 |   |
| General      partner                                           |   |                                  | 2.8    |                                |   |   | 2.1 |   |   |   | 5.4 |   |   |   | 3.1 |   |
|                                                           |   |                                  | 19.2   |                                |   |   | 17.7 |   |   |   | 52.8 |   |   |   | 37.7 |   |
|                                                           |   |                                  |   |                                |   |   |   |   |   |   |   |   |   |   |   |   |
| Net      income per common unit (Note 6)                       |   | $                                     | 0.47   |                                |   | $ | 0.45 |   |   | $ | 1.36 |   |   | $ | 1.16 |   |
|                                                           |   |                                  |   |                                |   |   |   |   |   |   |   |   |   |   |   |   |
| Weighted average common units      outstanding (millions)      |   |                                  | 34.9   |                                |   |   | 34.9 |   |   |   | 34.9 |   |   |   | 29.8 |   |
|                                                           |   |                                  |   |                                |   |   |   |   |   |   |   |   |   |   |   |   |
| Common units outstanding, end      of the period (millions)    |   |                                  | 34.9   |                                |   |   | 34.9 |   |   |   | 34.9 |   |   |   | 34.9 |   |

| (unaudited)                                                                     |   | Three      months ended June 30, |   |   | Six      months ended June 30, |   |
|---------------------------------------------------------------------------------|--------|---------------------------------------|--------|--------|-------------------------------------|--------|
| (millions      of dollars)                                                      |   | 2008                                  |   |   | 2007                                |   |   | 2008 |   |   | 2007 |   |
|                                                                            |   |                                  |   |   |                                |   |   |   |   |   |   |   |
| Net      income                                                                 |   |                                  | 19.2   |   |                                |   | 17.7 |   |   |   | 52.8 |   |   |   | 37.7 |   |
| Other      comprehensive income/(loss)                                          |   |                                  |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |
|    Change      associated with hedging transactions (Note 9)     |   |                                  | 11.9   |   |                                |   | 5.9 |   |   |   | (0.4 | ) |   |   | 4.7 |   |
|    Change      associated with hedging transactions of investees |   |                                  | 1.9    |   |                                |   | (0.1 | ) |   |   | 0.3 |   |   |   | (0.4 | ) |
|                                                                            |   |                                  | 13.8   |   |                                |   | 5.8 |   |   |   | (0.1 | ) |   |   | 4.3 |   |
| Total      comprehensive income                                                 |   |                                  | 33.0   |   |                                |   | 23.5 |   |   |   | 52.7 |   |   |   | 42.0 |   |
|                                                                            |   |                                  |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |
| See      accompanying notes to the consolidated financial    statements.        |   |                                  |   |   |                                |   |   |   |   |   |   |   |   |
|                                                                            |   |                                  |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |

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| (unaudited)                                                                                                   |   |               |    |   |                   |   |
|---------------------------------------------------------------------------------------------------------------|--------|--------------------|---------|--------|------------------------|--------|
| (millions      of dollars)                                                                                    |   | June      30, 2008 |    |   | December 31,      2007 |   |
| ASSETS                                                                                                        |   |               |    |   |                   |   |
| Current      Assets                                                                                           |   |               |    |   |                   |   |
|      Cash      and short-term investments                                            |   |               | 1.1     |   |                   |   | 7.5 |   |
|      Accounts      receivable and other                                              |   |               | 3.6     |   |                   |   | 4.2 |   |
|                                                                                                          |   |               | 4.7     |   |                   |   | 11.7 |   |
| Investment      in Great Lakes (Note 2)                                                                       |   |               | 717.8   |   |                   |   | 721.1 |   |
| Investment      in Northern Border (Note 3)                                                                   |   |               | 521.1   |   |                   |   | 541.9 |   |
| Plant,      property and equipment (net of $65.0 million accumulated depreciation,      2007 - $61.7 million) |   |               | 136.4   |   |                   |   | 134.1 |   |
| Goodwill                                                                                                      |   |               | 81.7    |   |                   |   | 81.7 |   |
| Other      assets                                                                                             |   |               | 1.7     |   |                   |   | 2.1 |   |
|                                                                                                          |   |               | 1,463.4 |   |                   |   | 1,492.6 |   |
|                                                                                                          |   |               |    |   |                   |   |   |   |
|                                                                                                          |   |               |    |   |                   |   |   |   |
| LIABILITIES      AND PARTNERS' EQUITY                                                                         |   |               |    |   |                   |   |   |   |
| Current      Liabilities                                                                                      |   |               |    |   |                   |   |   |   |
|      Bank      indebtedness                                                          |   |               | -       |   |                   |   | 1.4 |   |
|      Accounts      payable                                                           |   |               | 2.0     |   |                   |   | 4.8 |   |
|      Accrued      interest                                                           |   |               | 2.2     |   |                   |   | 3.0 |   |
|      Current      portion of long-term debt (Note 5)                                 |   |               | 4.5     |   |                   |   | 4.6 |   |
|                                                                                                          |   |               | 8.7     |   |                   |   | 13.8 |   |
| Other      long-term liabilities                                                                              |   |               | 10.3    |   |                   |   | 9.9 |   |
| Long-term      debt (Note 5)                                                                                  |   |               | 544.6   |   |                   |   | 568.8 |   |
|                                                                                                          |   |               | 563.6   |   |                   |   | 592.5 |   |
| Partners'      Equity                                                                                         |   |               |    |   |                   |   |   |   |
|      Common      units                                                               |   |               | 892.1   |   |                   |   | 892.3 |   |
|      General      partner                                                            |   |               | 19.1    |   |                   |   | 19.1 |   |
|      Accumulated      other comprehensive loss                                       |   |               | (11.4   | )      |                   |   | (11.3 | ) |
|                                                                                                          |   |               | 899.8   |   |                   |   | 900.1 |   |
|                                                                                                          |   |               | 1,463.4 |   |                   |   | 1,492.6 |   |
|                                                                                                          |   |               |    |   |                   |   |   |   |
| Subsequent      events (Note 12)                                                                              |   |               |    |   |                   |   |   |   |
|                                                                                                          |   |               |    |   |                   |   |   |   |
| See      accompanying notes to the consolidated financial    statements.                                      |   |               |    |   |                   |   |   |   |

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| (unaudited)                                                              |   | Six      months ended June 30, |   |
|--------------------------------------------------------------------------|--------|--------------------------------|--------|
| (millions      of dollars)                                               |   | 2008                           |   |   | 2007 |   |
|                                                                     |   |                           |   |   |   |   |
| CASH      GENERATED FROM OPERATIONS                                      |   |                           |   |   |   |   |
| Net      income                                                          |   |                           | 52.8   |   |   |   | 37.7 |   |
| Depreciation                                                             |   |                           | 3.3    |   |   |   | 3.1 |   |
| Amortization      of other assets                                        |   |                           | 0.2    |   |   |   | 0.2 |   |
| Non-controlling      interests                                           |   |                           | -      |   |   |   | 0.1 |   |
| Increase      in long-term liabilities                                   |   |                           | 0.1    |   |   |   | - |   |
| Equity      allowance for funds used during construction                 |   |                           | (0.2   | ) |   |   | - |   |
| (Increase)/decrease      in operating working capital (Note 10)          |   |                           | (4.4   | ) |   |   | 0.3 |   |
|                                                                     |   |                           | 51.8   |   |   |   | 41.4 |   |
|                                                                     |   |                           |   |   |   |   |   |   |
| INVESTING      ACTIVITIES                                                |   |                           |   |   |   |   |   |   |
| Return      of capital from Great Lakes (Note 2)                         |   |                           | 3.3    |   |   |   | 3.5 |   |
| Return      of capital from Northern Border (Note 3)                     |   |                           | 21.2   |   |   |   | 19.6 |   |
| Investment      in Great Lakes (Note 2)                                  |   |                           | -      |   |   |   | (736.3 | ) |
| Investment      in Northern Border (Note 3)                              |   |                           | -      |   |   |   | (7.5 | ) |
| Capital      expenditures                                                |   |                           | (5.4   | ) |   |   | (3.5 | ) |
| Other      assets                                                        |   |                           | -      |   |   |   | (1.1 | ) |
|                                                                     |   |                           | 19.1   |   |   |   | (725.3 | ) |
|                                                                     |   |                           |   |   |   |   |   |   |
| FINANCING      ACTIVITIES                                                |   |                           |   |   |   |   |   |   |
| Distributions      paid                                                  |   |                           | (53.0  | ) |   |   | (36.2 | ) |
| Equity      issuances, net                                               |   |                           | -      |   |   |   | 607.0 |   |
| Long-term      debt issued                                               |   |                           | -      |   |   |   | 141.0 |   |
| Long-term      debt repaid (Note 5)                                      |   |                           | (24.3  | ) |   |   | (24.4 | ) |
|                                                                     |   |                           | (77.3  | ) |   |   | 687.4 |   |
|                                                                     |   |                           |   |   |   |   |   |   |
| (Decrease)/increase      in cash and short-term investments              |   |                           | (6.4   | ) |   |   | 3.5 |   |
| Cash      and short-term investments, beginning of period                |   |                           | 7.5    |   |   |   | 4.6 |   |
|                                                                     |   |                           |   |   |   |   |   |   |
| Cash      and short-term investments, end of period                      |   |                           | 1.1    |   |   |   | 8.1 |   |
|                                                                     |   |                           |   |   |   |   |   |   |
| Interest      payments made                                              |   |                           | 14.3   |   |   |   | 15.9 |   |
|                                                                     |   |                           |   |   |   |   |   |   |
| See      accompanying notes to the consolidated financial    statements. |   |                           |   |   |   |   |   |   |

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|  (unaudited)                                                                                                                                                                                                                                                                                                                      |  Common      Units                                 |             |  General      Partner                                                                        |             | Accumulated      Other Comprehensive Loss (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, 2007                                                                                                                                                                                                                                                                                             |     34.9                            |             |         892.3                                             |             |           19.1                                  |                  |                    (11.3) |   |     34.9 |   |         900.1 |
| Net      income                                                                                                                                                                                                                                                                                                                        |          - |             |           47.4                                  |             |             5.4                       |                  |                           - |   |          - |   |           52.8 |
| Distributions      paid                                                                                                                                                                                                                                                                                                                |          - |             |          (47.6)                                      |             |            (5.4)                           |                  |                           - |   |          - |   |          (53.0) |
| Other      comprehensive loss                                                                                                                                                                                                                                                                                                          |          - |             |                 - |             |                 - |                  |                      (0.1) |   |          - |   |            (0.1) |
|                                                                                                                                                                                                                                                                                                                                   |                                                    |             |                                                                                              |             |                                                                                              |                  |   |   |   |   |   |
| Partners'      equity at June 30, 2008                                                                                                                                                                                                                                                                                                 |    34.9                                  |             |        892.1                                                   |             |          19.1                                        |                  |                   (11.4) |   |    34.9 |   |        899.8 |
|                                                                                                                                                                                                                                                                                                                                   |                                                    |             |                                                                                              |             |                                                                                              |                  |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                   |                                                    |             |                                                                                              |             |                                                                                              |                  |   |   |   |   |   |
| (1)      Based on interest rates at June 30, 2008, 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 $3.6 million,      which will be offset by a reduction to interest expense of a similar      amount. |
|                                                                                                                                                                                                                                                                                                                                   |                                                    |             |                                                                                              |             |                                                                                              |                  |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                   |                                                    |             |                                                                                              |             |                                                                                              |                  |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                   |                                                    |             |                                                                                              |             |                                                                                              |                  |   |   |   |   |   |
| See      accompanying notes to the consolidated financial    statements.                                                                                                                                                                                                                                                               |                                                    |             |                                                                                              |             |                                                                                              |                  |

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| Summarized      Consolidated Great Lakes Income Statement |   |                                   |   |   |                      |   |   |                   |   |   |
|-----------------------------------------------------------|--------|----------------------------------------|--------|--------|---------------------------|--------|--------|------------------------|--------|--------|
|                                                      |   |                                   |   |   |                      |   |   |                   |   |   | For      the period |   |
|                                                      |   |                                   |   |   |                      |   |   | Six      months        |   |   | February      23 |   |
| (unaudited)                                          |   |  Three      months ended June 30, |   |   | ended      June 30,  |   |   | to      June 30,  |   |
| (millions      of dollars)                                |   | 2008                                   |   |   | 2007                      |   |   | 2008                   |   |   | 2007 |   |
| Transmission      revenues                                |   |                                   | 67.5   |   |                      |   | 66.2   |                   |   |   | 147.2 |   |   |   | 96.6 |   |
| Operating      expenses                                   |   |                                   | (13.7  | )      |                      |   | (15.3  | )                      |   |   | (28.8 | ) |   |   | (21.4 | ) |
| Depreciation                                              |   |                                   | (14.6  | )      |                      |   | (14.5  | )                      |   |   | (29.2 | ) |   |   | (20.4 | ) |
| Financial      charges, net and other                     |   |                                   | (8.2   | )      |                      |   | (8.0   | )                      |   |   | (16.4 | ) |   |   | (11.4 | ) |
| Michigan      business tax                                |   |                                   | (1.3   | )      |                      |   | -      |                   |   |   | (3.0 | ) |   |   | - |   |
| Net      income                                           |   |                                   | 29.7   |   |                      |   | 28.4   |                   |   |   | 69.8 |   |   |   | 43.4 |   |

----

| Summarized      Consolidated Great Lakes Balance Sheet |   |          |    |   |              |   |
|--------------------------------------------------------|--------|---------------|---------|--------|-------------------|--------|
| (unaudited)                                            |   | June      30, |    |   | December      31, |   |
| (millions      of dollars)                             |   | 2008          |    |   | 2007              |   |
| Assets                                                 |   |          |    |   |              |   |
| Cash      and short-term investments                   |   |          | 52.2    |   |              |   | 32.0 |   |
| Other      current assets                              |   |          | 45.4    |   |              |   | 55.5 |   |
| Plant,      property and equipment, net                |   |          | 945.4   |   |              |   | 969.2 |   |
|                                                   |   |          | 1,043.0 |   |              |   | 1,056.7 |   |
| Liabilities      and Partners' Equity                  |   |          |    |   |              |   |   |   |
| Current      liabilities                               |   |          | 44.1    |   |              |   | 50.7 |   |
| Deferred      credits                                  |   |          | 0.4     |   |              |   | 0.4 |   |
| Long-term      debt, including current maturities      |   |          | 440.0   |   |              |   | 440.0 |   |
| Partners'      capital                                 |   |          | 558.5   |   |              |   | 565.6 |   |
|                                                   |   |          | 1,043.0 |   |              |   | 1,056.7 |   |

| Summarized      Northern Border Income Statement |   |                             |   |   |                           |   |   |   |   |   |
|--------------------------------------------------|--------|----------------------------------|--------|--------|--------------------------------|--------|--------|--------|--------|--------|
| (unaudited)                                      |   | Three      months ended June 30, |   |   | Six      months ended June 30, |   |
| (millions      of dollars)                       |   | 2008                             |   |   | 2007                           |   |   | 2008   |   |   | 2007 |   |
| Transmission      revenues                       |   |                             | 61.3   |   |                           |   | 68.8   |   |   |   | 145.1 |   |   |   | 148.4 |   |
| Operating      expenses                          |   |                             | (18.8  | )      |                           |   | (22.3  | )      |   |   | (38.2 | ) |   |   | (40.1 | ) |
| Depreciation                                     |   |                             | (15.3  | )      |                           |   | (15.2  | )      |   |   | (30.5 | ) |   |   | (30.5 | ) |
| Financial      charges, net and other            |   |                             | (9.5   | )      |                           |   | (10.3  | )      |   |   | (19.2 | ) |   |   | (20.7 | ) |
| Net      income                                  |   |                             | 17.7   |   |                           |   | 21.0   |   |   |   | 57.2 |   |   |   | 57.1 |   |

| Summarized      Northern Border Balance Sheet                           |   |          |    |   |              |   |
|-------------------------------------------------------------------------|--------|---------------|---------|--------|-------------------|--------|
| (unaudited)                                                             |   | June      30, |    |   | December      31, |   |
| (millions      of dollars)                                              |   | 2008          |    |   | 2007              |   |
| Assets                                                                  |   |          |    |   |              |   |
| Cash      and short-term investments                                    |   |          | 17.3    |   |              |   | 22.9 |   |
| Other      current assets                                               |   |          | 28.1    |   |              |   | 39.8 |   |
| Plant,      property and equipment, net                                 |   |          | 1,407.3 |   |              |   | 1,428.3 |   |
| Other      assets                                                       |   |          | 26.9    |   |              |   | 23.9 |   |
|                                                                    |   |          | 1,479.6 |   |              |   | 1,514.9 |   |
| Liabilities      and Partners' Equity                                   |   |          |    |   |              |   |   |   |
| Current      liabilities                                                |   |          | 48.8    |   |              |   | 53.4 |   |
| Deferred      credits and other                                         |   |          | 9.3     |   |              |   | 8.1 |   |
| Long-term      debt, including current maturities                       |   |          | 626.4   |   |              |   | 615.3 |   |
| Partners'      equity                                                   |   |          |    |   |              |   |   |   |
|      Partners'      capital                    |   |          | 799.0   |   |              |   | 840.5 |   |
|      Accumulated      other comprehensive loss |   |          | (3.9    | )      |              |   | (2.4 | ) |
|                                                                    |   |          | 1,479.6 |   |              |   | 1,514.9 |   |

----

| Summarized      Tuscarora Income Statement |   |                             |   |   |                           |   |   |   |   |   |
|--------------------------------------------|--------|----------------------------------|--------|--------|--------------------------------|--------|--------|--------|--------|--------|
| (unaudited)                                |   | Three      months ended June 30, |   |   | Six      months ended June 30, |   |
| (millions      of dollars)                 |   | 2008                             |   |   | 2007                           |   |   | 2008   |   |   | 2007 |   |
| Transmission      revenues                 |   |                             | 8.2    |   |                           |   | 6.7    |   |   |   | 15.1 |   |   |   | 13.6 |   |
| Operating      expenses                    |   |                             | (1.1   | )      |                           |   | (1.3   | )      |   |   | (2.3 | ) |   |   | (2.5 | ) |
| Depreciation                               |   |                             | (1.7   | )      |                           |   | (1.5   | )      |   |   | (3.3 | ) |   |   | (3.1 | ) |
| Financial      charges, net and other      |   |                             | (1.1   | )      |                           |   | (1.2   | )      |   |   | (2.0 | ) |   |   | (2.4 | ) |
| Net      income                            |   |                             | 4.3    |   |                           |   | 2.7    |   |   |   | 7.5 |   |   |   | 5.6 |   |

| Summarized      Tuscarora Balance Sheet           |   |          |   |   |              |   |
|---------------------------------------------------|--------|---------------|--------|--------|-------------------|--------|
| (unaudited)                                       |   | June      30, |   |   | December      31, |   |
| (millions      of dollars)                        |   | 2008          |   |   | 2007              |   |
| Assets                                            |   |          |   |   |              |   |
| Cash      and short-term investments              |   |          | -      |   |              |   | 6.1 |   |
| Other      current assets                         |   |          | 7.5    |   |              |   | 2.6 |   |
| Plant,      property and equipment, net           |   |          | 136.4  |   |              |   | 134.1 |   |
| Other      assets                                 |   |          | 0.4    |   |              |   | 0.6 |   |
|                                              |   |          | 144.3  |   |              |   | 143.4 |   |
| Liabilities      and Partners' Equity             |   |          |   |   |              |   |   |   |
| Current      liabilities                          |   |          | 1.8    |   |              |   | 6.1 |   |
| Long-term      debt, including current maturities |   |          | 64.1   |   |              |   | 66.4 |   |
| Partners'      capital                            |   |          | 78.4   |   |              |   | 70.9 |   |
|                                              |   |          | 144.3  |   |              |   | 143.4 |   |

| Summarized      Tuscarora Cash Flow Statement               |                                                                                                                                              |   |                                                                                                                              |   |                                                                                                                                              |   |
|-------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| (unaudited)                                                 | Three      months ended June 30,                                                                                                                  |   | Six      months ended June 30,                                                                                                    |
| (millions      of dollars)                                  | 2008                                                                                                                                              |   | 2007                                                                                                                              |   | 2008                                                                                                                                              |   | 2007 |
| Cash      flows provided by operating activities            |                     4.1                       |   |                      3.2 |   |                   10.1                                  |   |                      8.9 |
| Cash      flows used in investing activities                |                   (3.9)                                 |   |                    (2.5)           |   |                   (7.9)                                 |   |                    (3.7) |
| Cash      flows used in financing activities                |                   (0.2)                                 |   |                    (2.4)           |   |                   (8.3)                                 |   |                    (2.4) |
| (Decrease)/increase      in cash and short-term investments |                         - |   |                    (1.7)           |   |                   (6.1)                                 |   |                      2.8 |
| Cash      and short-term investments, beginning of period   |                         - |   |                      7.4 |   |                     6.1                       |   |                      2.9 |
| Cash      and short-term investments, end of period         |                         - |   |                      5.7 |   |                         - |   |                      5.7 |
|                                                        |                                                                                                                                              |   |                                                                                                                              |   |                                                                                                                                              |   |   |
|                                                        |                                                                                                                                              |   |                                                                                                                              |   |                                                                                                                                              |   |   |

----

| (unaudited)                               |   | June      30, |   |   | December      31, |   |
|-------------------------------------------|--------|---------------|--------|--------|-------------------|--------|
| (millions      of dollars)                |   | 2008          |   |   | 2007              |   |
|                                      |   |          |   |   |              |   |
| Senior      Credit Facility               |   |          | 485.0  |   |              |   | 507.0 |   |
| 7.13%      Series A Senior Notes due 2010 |   |          | 52.9   |   |              |   | 54.5 |   |
| 7.99%      Series B Senior Notes due 2010 |   |          | 5.3    |   |              |   | 5.5 |   |
| 6.89%      Series C Senior Notes due 2012 |   |          | 5.9    |   |              |   | 6.4 |   |
|                                      |   |          | 549.1  |   |              |   | 573.4 |   |

|                                                            |   |                             |   |   |                           |   |   |   |   |   |   |   |
|-----------------------------------------------------------------|--------|----------------------------------|--------|--------|--------------------------------|--------|--------|--------|--------|--------|--------|--------|
| (unaudited)                                                     |   | Three      months ended June 30, |   |   | Six      months ended June 30, |   |
| (millions      of dollars except per unit amounts)              |   | 2008                             |   |   | 2007                           |   |   | 2008   |   |   | 2007   |   |
| Net      income                                                 |   |                             | 19.2   |   |                           |   | 17.7   |   |   |   | 52.8   |   |   |   | 37.7 |   |
| Net      income allocated to general partner                    |   |                             |   |   |                           |   |   |   |   |   |   |   |   |   |   |   |
|    General      partner interest                 |   |                             | (0.3   | )      |                           |   | (0.4   | )      |   |   | (1.0   | )      |   |   | (0.8 | ) |
|    Incentive      distribution income allocation |   |                             | (2.5   | )      |                           |   | (1.7   | )      |   |   | (4.4   | )      |   |   | (2.3 | ) |
|                                                            |   |                             | (2.8   | )      |                           |   | (2.1   | )      |   |   | (5.4   | )      |   |   | (3.1 | ) |
| Net      income allocable to common units                       |   |                             | 16.4   |   |                           |   | 15.6   |   |   |   | 47.4   |   |   |   | 34.6 |   |
| Weighted      average common units outstanding (millions)       |   |                             | 34.9   |   |                           |   | 34.9   |   |   |   | 34.9   |   |   |   | 29.8 |   |
| Net      income per common unit                                 |   | $                                | 0.47   |   |                           | $      | 0.45   |   |   | $      | 1.36   |   |   | $ | 1.16 |   |

----

| (unaudited)                                                                                                                                                                                           |   | Three      months ended June 30, |   |   | Six      months ended June 30, |   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------------------|--------|--------|--------------------------------|--------|
| (millions      of dollars)                                                                                                                                                                            |   | 2008                             |   |   | 2007                           |   |   | 2008 |   |   | 2007(1) |   |
|                                                                                                                                                                                                  |   |                             |   |   |                           |   |   |   |   |   |   |   |
| Costs      charged by TransCanada and its affiliates:                                                                                                                                                 |   |                             |   |   |                           |   |   |   |   |   |
|      Great      Lakes                                                                                                                                                        |   |                             | 7.9    |   |                           |   | 12.9 |   |   |   | 15.2 |   |   |   | 17.0 |   |
|      Northern      Border                                                                                                                                                    |   |                             | 9.2    |   |                           |   | 7.5 |   |   |   | 16.0 |   |   |   | 7.5 |   |
|      Tuscarora                                                                                                                                                               |   |                             | 0.9    |   |                           |   | 0.8 |   |   |   | 2.0 |   |   |   | 0.9 |   |
| Impact      on the Partnership's net income:                                                                                                                                                          |   |                             |   |   |                           |   |   |   |   |   |   |   |   |   |   |   |
|      Great      Lakes                                                                                                                                                        |   |                             | 3.7    |   |                           |   | 6.0 |   |   |   | 7.1 |   |   |   | 7.9 |   |
|      Northern      Border                                                                                                                                                    |   |                             | 3.1    |   |                           |   | 3.8 |   |   |   | 6.4 |   |   |   | 3.8 |   |
|      Tuscarora                                                                                                                                                               |   |                             | 0.9    |   |                           |   | 0.8 |   |   |   | 2.0 |   |   |   | 0.9 |   |
|                                                                                                                                                                                                  |   |                             |   |   |                           |   |   |   |   |   |   |   |   |   |   |   |
| (1)      The amounts disclosed for Great Lakes are for the period February 23 to      June 30, 2007. The amounts disclosed for Northern Border are for the      period April 1 to June 30, 2007. |   |
|                                                                                                                                                                                                  |   |                             |   |   |                           |   |   |   |   |   |   |   |   |   |   |   |

| (unaudited)                                         |   | June      30, |   |   | December      31, |   |
|-----------------------------------------------------|--------|---------------|--------|--------|-------------------|--------|
| (millions      of dollars)                          |   | 2008          |   |   | 2007              |   |
|                                                |   |          |   |   |              |   |
| Amount      owed to TransCanada and its affiliates: |   |          |   |   |
|      Great      Lakes      |   |          | 5.7    |   |              |   | 1.9 |   |
|      Northern      Border  |   |          | 4.8    |   |              |   | 3.0 |   |
|      Tuscarora             |   |          | 0.6    |   |              |   | 3.5 |   |

----

| (unaudited)                                               |   | Six      months ended June 30, |   |
|-----------------------------------------------------------|--------|--------------------------------|--------|
| (millions      of dollars)                                |   | 2008                           |   |   | 2007 |   |
|                                                      |   |                           |   |   |   |   |
| Decrease/(increase)      in accounts receivable and other |   |                           | 0.6    |   |   |   | (0.7 | ) |
| Decrease      in bank indebtedness                        |   |                           | (1.4   | ) |   |   | - |   |
| Decrease      in accounts payable                         |   |                           | (2.8   | ) |   |   | (0.8 | ) |
| Decrease/(increase)      in accrued interest              |   |                           | (0.8   | ) |   |   | 1.8 |   |
|                                                      |   |                           | (4.4   | ) |   |   | 0.3 |   |

----

| ·   | the      ability of Great Lakes Gas Transmission Limited Partnership (Great Lakes)      and Northern Border Pipeline Company (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   | competitive      conditions in the overall natural gas and electricity    markets; |
|---------------|------------------------------------------------------------------------------------|

| o   | availability      of supplies of Canadian and United States (U.S.) natural    gas; |
|---------------|------------------------------------------------------------------------------------|
| o   | the      oversupply of natural gas in the Mid-continent  market;              |

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

| o   | weather      conditions; |
|---------------|--------------------------|

| o   | competitive      developments by Canadian and U.S. natural gas transmission companies,      including the construction of REX East to Clarington, Ohio;      and                                                                                                               |
|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| o   | development      of newly discovered natural gas plays such as the Horn River      and Montney shale gas plays in Western Canada, the Louisiana      Haynesville shale gas play, and the Marcellus shale gas play in West      Virginia, Pennsylvania, and NewYork.  |

| ·   | the      Alberta (Canada) government’s decision to implement a new royalty regime      effective January 2009 may affect the amount of exploration and      drilling in the Western Canada Sedimentary Basin(WCSB); |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·        | obtaining commercial      support for the Bison Pipeline Project and whether or not Northern Border      proceeds with the project;                                                                                       |

| ·   | the      decision by TransCanada to advance the Pathfinder  Project; |
|--------------------|----------------------------------------------------------------------|

| ·   | the      successful completion, timing, cost, scope and future financial      performance of expansion projects could differ materially from our      expectations due to availability of contractors or equipment, weather,      difficulties or delays in obtaining regulatory approvals or denied      applications, land owner opposition, the lack of adequate materials, labor      difficulties or shortages, expansion costs that are higher than      anticipated and numerous other factors beyond our  control; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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

| ·   | the      imposition of state income taxes 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, on      us and our pipeline systems; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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

| ·   | prevailing      economic conditions, including conditions of the capital and equity      markets and our ability to access thesemarkets. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------|

----

----

----

----

----

|  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. |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                             |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                             |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                             |   | For      the three months ended June 30, 2008 |   | For      the six months ended June 30, 2008 |
| (unaudited)                                                                                                                                                                                      |   |   |   |   |   |   |   |   |   |  |   |   |   |   |   |   |   |   |   |
| (millions      of dollars)                                                                                                                                                                       |   | PipeLP |   | TGTC(1) |   | Other |   | GLGT(2) |   |        NBPC(3) |   | PipeLP |   | TGTC(1) |   | Other |   | GLGT(2) |   |        NBPC(3) |
| Transmission      revenues                                                                                                                                                                       |   |        8.2 |   |         8.2 |   |            - |   |       67.5 |   |       61.3 |   |      15.1 |   |       15.1 |   |            - |   |     147.2 |   |     145.1 |
| Operating      expenses                                                                                                                                                                          |   |      (2.3) |   |       (1.1) |   |       (1.2) |   |     (13.7) |   |     (18.8) |   |      (4.5) |   |       (2.3) |   |       (2.2) |   |     (28.8) |   |     (38.2) |
|                                                                                                                                                                                             |   |        5.9 |   |         7.1 |   |       (1.2) |   |       53.8 |   |       42.5 |   |      10.6 |   |       12.8 |   |       (2.2) |   |     118.4 |   |     106.9 |
| Depreciation                                                                                                                                                                                     |   |      (1.7) |   |       (1.7) |   |            - |   |     (14.6) |   |     (15.3) |   |      (3.3) |   |       (3.3) |   |            - |   |     (29.2) |   |     (30.5) |
| Financial      charges, net and other                                                                                                                                                            |      (7.5) |   |       (1.1) |   |       (6.4) |   |       (8.2) |   |       (9.5) |   |    (15.1) |   |       (2.0) |   |     (13.1) |   |     (16.4) |   |     (19.2) |
| Michigan      business tax                                                                                                                                                                       |   |            - |   |            - |   |            - |   |       (1.3) |   |            - |   |            - |   |            - |   |            - |   |       (3.0) |   |            - |
|                                                                                                                                                                                             |   |   |   |   |   |   |   |       29.7 |   |       17.7 |   |   |   |   |   |   |   |       69.8 |   |       57.2 |
| Equity      income                                                                                                                                                                               |   |      22.5 |   |            - |   |            - |   |       13.8 |   |         8.7 |   |      60.6 |   |            - |   |            - |   |       32.4 |   |       28.2 |
| Net      income                                                                                                                                                                                  |   |      19.2 |   |         4.3 |   |       (7.6) |   |       13.8 |   |         8.7 |   |      52.8 |   |         7.5 |   |     (15.3) |   |       32.4 |   |       28.2 |
|                                                                                                                                                                                             |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                             |   | For      the three months ended June 30, 2007 |   | For      the six months ended June 30, 2007 |
| (unaudited)                                                                                                                                                                                      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (millions      of dollars)                                                                                                                                                                       |   | PipeLP |   | TGTC(1) | Other |   | GLGT(2) |        NBPC(3) |   | PipeLP |   | TGTC(1) | Other |   | GLGT(2) | NBPC(3) |
| Transmission      revenues                                                                                                                                                                       |   |        6.7 |   |         6.7 |   |          - |   |       66.2 |   |       68.8 |   |      13.6 |   |       13.6 |   |            - |   |       96.6 |   |     148.4 |
| Operating      expenses                                                                                                                                                                          |   |      (2.2) |   |       (1.3) |   |       (0.9) |   |     (15.3) |   |     (22.3) |   |      (4.2) |   |       (2.5) |   |       (1.7) |   |     (21.4) |   |     (40.1) |
|                                                                                                                                                                                             |   |        4.5 |   |         5.4 |   |       (0.9) |   |       50.9 |   |       46.5 |   |        9.4 |   |       11.1 |   |       (1.7) |   |       75.2 |   |     108.3 |
| Depreciation                                                                                                                                                                                     |   |      (1.5) |   |       (1.5) |   |            - |   |     (14.5) |   |     (15.2) |   |      (3.1) |   |       (3.1) |   |            - |   |     (20.4) |   |     (30.5) |
| Financial      charges, net and other                                                                                                                                                            |      (8.7) |   |       (1.2) |   |       (7.5) |   |       (8.0) |   |     (10.3) |   |    (16.8) |   |       (2.4) |   |     (14.4) |   |     (11.4) |   |     (20.7) |
|                                                                                                                                                                                             |   |   |   |   |   |   |   |       28.4 |   |       21.0 |   |   |   |   |   |   |   |       43.4 |   |       57.1 |
| Equity      income                                                                                                                                                                               |   |      23.4 |   |            - |   |            - |   |       13.1 |   |       10.3 |   |      48.2 |   |            - |   |            - |   |       20.1 |   |       28.1 |
| Net      income                                                                                                                                                                                  |   |      17.7 |   |         2.7 |   |       (8.4) |   |       13.1 |   |       10.3 |   |      37.7 |   |         5.6 |   |     (16.1) |   |       20.1 |   |       28.1 |
|                                                                                                                                                                                             |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                             |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |

----

----

----

| (unaudited)                                                                                                                                                                                                                     |   | Three      months ended June 30, |   |   | Six      months ended June 30, |   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------------------|--------|--------|-------------------------------------|--------|
| (millions      of dollars except per common unit amounts)                                                                                                                                                                       |   | 2008                             |   |   | 2007                                |   |   | 2008 |   |   | 2007 |   |
| Net      Income                                                                                                                                                                                                                 |   |                             | 19.2   |   |                                |   | 17.7 |   |   |   | 52.8 |   |   |   | 37.7 |   |
|  Add:                                                                                                                                                                                                                      |   |                             |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                            |   |                             |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |
| Cash      flows provided by Tuscarora's operating activities                                                                                                                                                                    |   |                             | 4.1    |   |                                |   | 3.2 |   |   |   | 10.1 |   |   |   | 8.9 |   |
| Cash      distributions from Great Lakes                                                                                                                                                                                        |   |                             | 24.1   |   |                                |   | 23.6 |   |   |   | 35.7 |   |   |   | 23.6 |   |
| Cash      distributions from Northern Border                                                                                                                                                                                    |   |                             | 26.3   |   |                                |   | 25.5 |   |   |   | 49.4 |   |   |   | 47.7 |   |
| Less:                                                                                                                                                                                                                           |   |                             |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |
| Tuscarora's      net income                                                                                                                                                                                                     |   |                             | (4.3)  |   |                                |   | (2.7) |   |   |   | (7.5) |   |   |   | (5.6) |   |
| Equity      income from investment in Great Lakes                                                                                                                                                                               |   |                             | (13.8  | )      |                                |   | (13.1 | ) |   |   | (32.4 | ) |   |   | (20.1 | ) |
| Equity      income from investment in Northern Border                                                                                                                                                                           |   |                             | (8.7   | )      |                                |   | (10.3 | ) |   |   | (28.2 | ) |   |   | (28.1 | ) |
| Partnership      cash flows                                                                                                                                                                                                     |   |                             | 46.9   |   |                                |   | 43.9 |   |   |   | 79.9 |   |   |   | 64.1 |   |
| Partnership      cash flows allocated to general partner(1)                                                                                                                                                                     |   |                             | (3.0   | )      |                                |   | (2.2 | ) |   |   | (5.4 | ) |   |   | (3.0 | ) |
| Partnership      cash flows allocated to common units                                                                                                                                                                           |   |                             | 43.9   |   |                                |   | 41.7 |   |   |   | 74.5 |   |   |   | 61.1 |   |
| Cash      distributions declared                                                                                                                                                                                                |   |                             | (27.8  | )      |                                |   | (25.1 | ) |   |   | (55.2 | ) |   |   | (50.0 | ) |
| Cash      distributions declared per common unit                                                                                                                                                                                |   | $                                | 0.705  |   |                                | $      | 0.655 |   |   | $ | 1.405 |   |   | $ | 1.305 |   |
| Cash      distributions paid                                                                                                                                                                                                    |   |                             | (27.4  | )      |                                |   | (24.9 | ) |   |   | (53.0 | ) |   |   | (36.2 | ) |
| Cash      distributions paid per common unit                                                                                                                                                                                    |   | $                                | 0.700  |   |                                | $      | 0.65 |   |   | $ | 1.365 |   |   | $ | 1.25 |   |
|                                                                                                                                                                                                                            |   |                             |   |   |                                |   |   |   |   |   |   |   |   |   |   |   |
| (1)      Partnership cash flows allocated to general partner represents the cash      distributions paid to the general partner with respect to its two per cent      interest plus an amount equal to incentive distributions. |   |

----

|                                      | Payments      Due by Period                                                                                                             |
|-------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------|
| (millions      of dollars)                | Total                                                                                                                                   |   | Less      Than 1 Year | Long-term      Portion |
|                                      |                                                                                                                                    |   |   |   |   |
| Senior      Credit Facility               |                   485.0                       |   |                          - |   |                   485.0 |
| 7.13%      Series A Senior Notes due 2010 |                     52.9            |   |                       3.2 |   |                     49.7 |
| 7.99%      Series B Senior Notes due 2010 |                       5.3 |   |                       0.5 |   |                       4.8 |
| 6.89%      Series C Senior Notes due 2012 |                       5.9 |   |                       0.8 |   |                       5.1 |
| Total                                     |                   549.1                       |   |                       4.5 |   |                   544.6 |
|                                      |                                                                                                                                    |   |   |   |   |

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|                                            | Payments      Due by Period                                                                                                  |
|-------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------|
| (millions      of dollars)                      | Total                                                                                                                        |   | Less      than 1 year |   | Long-term      Portion |
|                                            |                                                                                                                         |   |   |   |   |
| 8.74%      series Senior Notes due 2008 to 2011 |                     40.0 |   |                     10.0 |   |                     30.0 |
| 9.09%      series Senior Notes due 2012 to 2021 |                   100.0            |   |                          - |   |                   100.0 |
| 6.73%      series Senior Notes due 2009 to 2018 |                     90.0 |   |                       9.0 |   |                     81.0 |
| 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                                           |                   440.0            |   |                     19.0 |   |                   421.0 |

|                                                                                                                                  | Payments      Due by Period                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------|
| (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)                                                                                       |                   177.0 |   |                          - |   |                   177.0 |
| Total                                                                                                                                 |                   627.0 |   |                         - |   |                   627.0 |
|                                                                                                                                  |                                                                                                              |   |   |   |   |
| (a)      Northern Border is required to pay a facility fee of 0.05% on the      principal commitment amount of its credit  agreement. |

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| 10.1 | Transportation      Service Agreement FT9141 between Great Lakes Gas Transmission Limited      Partnership and ANR Pipeline Company, dated March 12,  2008. |
|------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.2 | Transportation      Service Agreement FT9158 between Great Lakes Gas Transmission Limited      Partnership and ANR Pipeline Company, dated March 14,  2008. |
|------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.3 | Interconnect      Agreement between ANR Pipeline Company and Northern Border Pipeline      Company, dated June 9, 2008. |
|------|-------------------------------------------------------------------------------------------------------------------------|

| 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. |
|------------------|-------------------------------------------------------------------------------------------------------------------|

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|   | TC      PipeLines, LP                       |
|--------|---------------------------------------------|
|   | (a      Delaware Limited Partnership)  |
|   | By:                                         | TC      PipeLines GP, Inc., its general partner  |
| Date:  | August      5, 2008                         | By: | /s/  Russell      K. Girling Russell      K. GirlingChairman,      Chief Executive Officer and DirectorTC      PipeLines GP, Inc. (Principal Executive Officer)  |
| Date:  | August      5, 2008                         | By: | /s/  Amy W.      LeongAmy      W. LeongControllerTC      PipeLines GP, Inc. (Principal FinancialOfficer) |

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