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


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934


                                  Enbridge Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Shares
--------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    29250N105
                         ------------------------------
                                 (CUSIP Number)


                                October 17, 2003
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


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

[_]   Rule 13d-1(b)
[X]   Rule 13d-1(c)
[_]   Rule 13d-1(d)


----------
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                                      -2-

-------------------------------
     CUSIP No. 29250N105              13G
-------------------------------

--------------------------------------------------------------------------------
   1. NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

            Canada Pension Plan Investment Board / Not applicable

--------------------------------------------------------------------------------
   2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)(a) [_]
            Not applicable                                               (b) [_]

--------------------------------------------------------------------------------
   3. SEC USE ONLY

--------------------------------------------------------------------------------
   4. CITIZENSHIP OR PLACE OF ORGANIZATION
            Canada

--------------------------------------------------------------------------------
                    5.  SOLE VOTING POWER:
                              11,119,607
    NUMBER OF     --------------------------------------------------------------
     SHARES         6.  SHARED VOTING POWER:
  BENEFICIALLY                0
    OWNED BY      --------------------------------------------------------------
      EACH          7.  SOLE DISPOSITIVE POWER:
    REPORTING                 11,119,607
     PERSON       --------------------------------------------------------------
      WITH          8.  SHARED DISPOSITIVE POWER:
                              0
--------------------------------------------------------------------------------
   9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
               11,119,607
--------------------------------------------------------------------------------
  10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES   [_]

      (SEE INSTRUCTIONS)

--------------------------------------------------------------------------------


                                      -3-
--------------------------------------------------------------------------------
  11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            6.48%
--------------------------------------------------------------------------------
  12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
            CO
--------------------------------------------------------------------------------

Item 1(a).  Name of Issuer

               The name of the issuer is Enbridge Inc. (the "Company").

Item 1(b).  Address of Issuer's Principal Executive Offices

               The principal executive offices of the Company are located at
Suite 3000, 425 1st Street S.W., Calgary, Alberta T2P 3L8, Canada.

Item 2(a).  Name of Person Filing

               This statement is being filed by Canada Pension Plan Investment
Board ("CPP Investment Board").

Item 2(b).  Address of Principal Business Office or, if none, Residence

               The address of the principal business office of the reporting
person is One Queen Street East, Suite 2700, Toronto, Ontario M5C 2W5, Canada.

Item 2(c).  Citizenship

               Canada.

Item 2(d).  Title of Class of Securities

               The securities to which this statement relates are Common Shares
(the "Shares") of the Company.

Item 2(e).  CUSIP Number

               The CUSIP number of the Shares is 29250N105.

Item 3.     If this statement is filed pursuant to ss.ss. 240.13d-1(b) or
            240.13d-2(b) or (c), check whether the person filing is a:

               Not applicable.


                                      -5-
Item 4.     Ownership

                  (a) As of March 15, 2004, CPP Investment Board directly owned
            11,119,607 Shares.

                  (b) The Shares directly owned by CPP Investment Board
            represented approximately 6.48% of the issued and outstanding Shares
            as of March 15, 2004.

                  (c) As of March 15, 2004, CPP Investment Board had the sole
            power to vote or to direct the voting of the Shares and had the sole
            power to dispose of or to direct the disposition of the Shares.

Item 5.     Ownership of Five Percent or Less of a Class

               Not applicable.


Item 6.     Ownership of More than Five Percent on Behalf of Another Person

               Not applicable.


Item 7.     Identification and Classification of the Subsidiary Which
            Acquired the Security Being Reported on by the Parent Holding
            Company

               Not applicable.


Item 8.     Identification and Classification of Members of the Group

               Not applicable.


Item 9.     Notice of Dissolution of Group

               Not applicable.


Item 10.    Certification

               By signing below I certify that, to the best of my knowledge and
            belief, the securities referred to above 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.



                                      -6-


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. As of March 15, 2004


                                        Canada Pension Plan Investment Board


                                        By: /s/ J. H. Butler
                                        ----------------------------------------
                                        Name:J. H. Butler
                                        Title: Vice President - General Counsel
                                               and Corporate Secretary