UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G
                    Under the Securities Exchange Act of 1934
                                 Amendment No. 6


                                TC PipeLines, LP
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                                (Name of Issuer)



        Common Units representing limited partner interests, no par value
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                         (Title of Class of Securities)


                                    87233Q108
                  --------------------------------------------
                                 (CUSIP Number)





                                December 31, 2004
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             (Date of Event Which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X] Rule 13d-1(b)

[_] Rule 13d-1(c)

[_] Rule 13d-1(d)



                                Page 1 of 8 pages

----------------------- CUSIP No. 87233Q108 13G ----------------------- ------------------------------------------------------------------------------ 1. Name of Reporting Person I.R.S. Identification No. of above Person Goldman, Sachs & Co. ------------------------------------------------------------------------------ 2. Check the Appropriate Box if a Member of a Group (a) [_] (b) [_] ------------------------------------------------------------------------------ 3. SEC Use Only ------------------------------------------------------------------------------ 4. Citizenship or Place of Organization New York ------------------------------------------------------------------------------ 5. Sole Voting Power Number of 0 Shares ---------------------------------------------------------- 6. Shared Voting Power Beneficially 4,770 Owned by ---------------------------------------------------------- Each 7. Sole Dispositive Power Reporting 0 Person ---------------------------------------------------------- 8. Shared Dispositive Power With: 1,555,183 ------------------------------------------------------------------------------ 9. Aggregate Amount Beneficially Owned by Each Reporting Person 1,555,183 ------------------------------------------------------------------------------ 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares [_] ------------------------------------------------------------------------------ 11. Percent of Class Represented by Amount in Row (9) 8.9% ------------------------------------------------------------------------------ 12. Type of Reporting Person BD-PN-IA ------------------------------------------------------------------------------ Page 2 of 8 pages

----------------------- CUSIP No. 87233Q108 13G ----------------------- ------------------------------------------------------------------------------ 1. Name of Reporting Person I.R.S. Identification No. of above Person The Goldman Sachs Group, Inc. ------------------------------------------------------------------------------ 2. Check the Appropriate Box if a Member of a Group (a) [_] (b) [_] ------------------------------------------------------------------------------ 3. SEC Use Only ------------------------------------------------------------------------------ 4. Citizenship or Place of Organization Delaware ------------------------------------------------------------------------------ 5. Sole Voting Power Number of 0 Shares ---------------------------------------------------------- 6. Shared Voting Power Beneficially 4,770 Owned by ---------------------------------------------------------- Each 7. Sole Dispositive Power Reporting 0 Person ---------------------------------------------------------- 8. Shared Dispositive Power With: 1,555,183 ------------------------------------------------------------------------------ 9. Aggregate Amount Beneficially Owned by Each Reporting Person 1,555,183 ------------------------------------------------------------------------------ 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares [_] ------------------------------------------------------------------------------ 11. Percent of Class Represented by Amount in Row (9) 8.9% ------------------------------------------------------------------------------ 12. Type of Reporting Person HC-CO ------------------------------------------------------------------------------ Page 3 of 8 pages

Item 4. Ownership.* (a). Amount beneficially owned: See the response(s) to Item 9 on the attached cover page(s). (b). Percent of Class: See the response(s) to Item 11 on the attached cover page(s). (c). Number of shares as to which such person has: (i). Sole power to vote or to direct the vote: See the response(s) to Item 5 on the attached cover page(s). (ii). Shared power to vote or to direct the vote: See the response(s) to Item 6 on the attached cover page(s). (iii). Sole power to dispose or to direct the disposition of: See the response(s) to Item 7 on the attached cover page(s). (iv). Shared power to dispose or to direct the disposition of: See the response(s) to Item 8 on the attached cover page(s). Item 10. Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. -------------------------- * In accordance with the Securities and Exchange Commission (the "SEC") Release No. 34-39538 (January 12, 1998), this filing reflects the securities beneficially owned by the investment banking division ("IBD") of The Goldman Sachs Group, Inc. and its subsidiaries and affiliates (collectively, "GSG"). This filing does not reflect securities, if any, beneficially owned by any other operating unit of GSG. IBD disclaims beneficial ownership of the securities beneficially owned by (i) any client accounts with respect to which IBD or its employees have voting or investment discretion, or both and (ii) certain investment entities, of which IBD is the general partner, managing general partner or other manager, to the extent interests in such entities are held by persons other than IBD. Page 4 of 8 pages

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February 7, 2005 THE GOLDMAN SACHS GROUP, INC. By:/s/ Ted Chang ---------------------------------------- Name: Ted Chang Title: Attorney-in-fact GOLDMAN, SACHS & CO. By:/s/ Ted Chang ---------------------------------------- Name: Ted Chang Title: Attorney-in-fact Page 5 of 8 pages

INDEX TO EXHIBITS Exhibit No. Exhibit ----------- ------- 99.1 Power of Attorney, dated December 12, 2003, relating to The Goldman Sachs Group, Inc. 99.2 Power of Attorney, dated November 19, 2003, relating to Goldman, Sachs & Co. Page 6 of 8 pages

EXHIBIT (99.1) POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS that THE GOLDMAN SACHS GROUP, INC. (the "Company") does hereby make, constitute and appoint each of Roger S. Begelman, Edward T. Joel, Saskia Brookfied Martin and Ted Chang, (and any other employee of The Goldman Sachs Group, Inc. or one of its affiliates designated in writing by one of the attorneys-in-fact), acting individually, its true and lawful attorney, to execute and deliver in its name and on its behalf whether the Company is acting individually or as representative of others, any and all filings required to be made by the Company under the Securities Exchange Act of 1934, (as amended, the "Act"), with respect to securities which may be deemed to be beneficially owned by the Company under the Act, giving and granting unto each said attorney-in-fact power and authority to act in the premises as fully and to all intents and purposes as the Company might or could do if personally present by one of its authorized signatories, hereby ratifying and confirming all that said attorney-in-fact shall lawfully do or cause to be done by virtue hereof. THIS POWER OF ATTORNEY shall remain in full force and effect until either revoked in writing by the undersigned or until such time as the person or persons to whom power of attorney has been hereby granted cease(s) to be an employee of The Goldman Sachs Group, Inc. or one of its affiliates. IN WITNESS WHEREOF, the undersigned has duly subscribed these presents as of December 12th, 2003. THE GOLDMAN SACHS GROUP, INC. By: /s/ Gregory K. Palm ------------------------------------ Name: Gregory K. Palm Title: Executive Vice President and General Counsel Page 7 of 8 pages

EXHIBIT 99.2 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS that GOLDMAN, SACHS & CO. (the "Company") does hereby make, constitute and appoint each of Roger S. Begelman, Edward T. Joel, Saskia Brookfied Martin and Ted Chang, (and any other employee of The Goldman Sachs Group, Inc. or one of its affiliates designated in writing by one of the attorneys-in-fact), acting individually, its true and lawful attorney, to execute and deliver in its name and on its behalf whether the Company is acting individually or as representative of others, any and all filings required to be made by the Company under the Securities Exchange Act of 1934, (as amended, the "Act"), with respect to securities which may be deemed to be beneficially owned by the Company under the Act, giving and granting unto each said attorney-in-fact power and authority to act in the premises as fully and to all intents and purposes as the Company might or could do if personally present by one of its authorized signatories, hereby ratifying and confirming all that said attorney-in-fact shall lawfully do or cause to be done by virtue hereof. THIS POWER OF ATTORNEY shall remain in full force and effect until either revoked in writing by the undersigned or until such time as the person or persons to whom power of attorney has been hereby granted cease(s) to be an employee of The Goldman Sachs Group, Inc. or one of its affiliates. IN WITNESS WHEREOF, the undersigned has duly subscribed these presents as of November 19th, 2003. GOLDMAN, SACHS & CO. By: /s/ Gregory K. Palm ---------------------------- Name: Gregory K. Palm Title: Managing Director Page 8 of 8 pages