<Page>
                                                                          [LOGO]

                           NOTICE OF 2004 ANNUAL AND
                        SPECIAL MEETING OF SHAREHOLDERS

                                 APRIL 23, 2004

                           MANAGEMENT PROXY CIRCULAR

                               FEBRUARY 24, 2004
<Page>
                               TABLE OF CONTENTS

<Table>
<Caption>
                                                                 PAGE
                                                               --------
                                                            
NOTICE OF ANNUAL AND SPECIAL MEETING........................          2

MANAGEMENT PROXY CIRCULAR...................................          3

  General Information.......................................          3

  Information on Voting.....................................          3

BUSINESS TO BE TRANSACTED AT THE MEETING....................          5

    1.  Financial Statements................................          5

    2.  Election of Directors...............................          5

    3.  Appointment of Auditors.............................          9

    4.  Amendments to the Stock Option Plan.................         10

    5.  Approval of the Shareholder Rights Plan.............         11

    6.  Shareholder Proposals...............................         11

COMPENSATION AND OTHER INFORMATION..........................         11

    Compensation of Directors...............................         11

    Compensation of Officers................................         13

    Pension and Retirement Benefits.........................         16

    Employment Contracts....................................         18

    Composition of the Human Resources Committee............         18

    Report on Executive Compensation........................         18

    Performance Graph.......................................         23

    Corporate Governance....................................         23

    Directors' and Officers' Liability Insurance............         27

DIRECTORS' APPROVAL.........................................         27

CERTIFICATE.................................................         27

Schedule "A" -- Stock Option Plan Ordinary Resolution.......        A-1

Schedule "B" -- Shareholder Rights Plan Ordinary
  Resolution................................................        B-1

Schedule "C" -- Statement of Corporate Governance
  Practices.................................................        C-1
</Table>

i  TRANSCANADA CORPORATION
<Page>
                                                                          [LOGO]

March 15, 2004

Dear Shareholder:

You are invited to attend the Annual and Special Meeting of the holders of
common shares of TransCanada Corporation to be held in the Imperial Ballroom at
the Hyatt Regency Calgary Downtown, 700 Centre Street S.E., Calgary, Alberta, on
Friday, April 23, 2004 at 10:30 a.m. (Mountain Daylight Time).

In addition to attending to regular annual meeting business, shareholders will
be requested to approve resolutions to amend the Stock Option Plan and to
continue and ratify, confirm and approve the Shareholder Rights Plan.

The Management Proxy Circular and other enclosed information contain a detailed
description of the matters on which you will be requested to vote. Please give
this material your careful consideration.

Please complete and return the enclosed form of proxy in accordance with the
instructions provided, which will allow for your representation at the meeting.
If you are a registered owner and are able to attend the meeting, you may revoke
your proxy by providing notice at the meeting.

Yours very truly,

/s/ Harold N. Kvisle

Harold N. Kvisle
President and Chief Executive Officer

The Hyatt Regency is conveniently located next to the C-Train platform at Centre
Street N.E. (eastbound trains) and down the street from Olympic Plaza (westbound
trains), which is located between 1st and 2nd Street S.E. Complimentary parking
will be available for TransCanada shareholders at the Telus Convention Centre.
Access to the Telus Convention Centre underground parking garage (clearance
approx. 2 metres) is located at 727 - 1st Street S.E. just as you pass over the
C-Train tracks on the right hand side. Please tell the garage attendant that you
are attending the TransCanada shareholders meeting upon departure.

                                                      TRANSCANADA CORPORATION  1
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                                                                          [LOGO]

                      NOTICE OF ANNUAL AND SPECIAL MEETING

NOTICE IS HEREBY GIVEN that the Annual and Special Meeting (the "Meeting") of
the holders of common shares (the "common shares") of TransCanada Corporation
("TransCanada") will be held in the Imperial Ballroom at the Hyatt Regency
Calgary Downtown, 700 Centre Street S.E., Calgary, Alberta, on Friday,
April 23, 2004 at 10:30 a.m. (Mountain Daylight Time).

    HOLDERS OF COMMON SHARES ARE INVITED TO ATTEND THE MEETING FOR THE FOLLOWING
PURPOSES:

    (1) to receive the consolidated financial statements for the year ended
       December 31, 2003 and the auditors' report thereon;

    (2) to elect the directors;

    (3) to appoint the auditors and authorize the directors to fix their
       remuneration;

    (4) to consider and, if deemed appropriate, to pass, with or without
       variation, an ordinary resolution to amend the Stock Option Plan, as
       described in the enclosed Management Proxy Circular;

    (5) to consider and, if deemed appropriate, to pass, with or without
       variation, an ordinary resolution to continue and ratify, confirm and
       approve the Shareholder Rights Plan, as described in the enclosed
       Management Proxy Circular; and

    (6) to transact such other business as may properly come before the Meeting
       or any adjournment thereof.

Shareholders of record at the close of business on March 5, 2004 will be
entitled to vote at the Meeting. TransCanada will prepare, no later than
10 days following the record date, an alphabetical list of shareholders who are
entitled to vote as of the record date, showing the number of common shares held
by each such shareholder. Each person named on the list of shareholders is
entitled to one vote for each share held.

Shareholders are requested to complete, date, sign and return (in the envelope
provided for that purpose) the accompanying form of proxy for use at the
Meeting. Such proxies must be received before 4:30 p.m. (Eastern Daylight Time)
on Wednesday, April 21, 2004 by TransCanada's transfer agent, Computershare
Trust Company of Canada, Stock Transfer Services, 9th Floor, 100 University
Avenue, Toronto, Ontario, M5J 2Y1. Shareholders may also cast their vote
electronically by following the instructions provided on the form of proxy.

The 2003 Annual Report, the Management Proxy Circular and a form of proxy
accompany this Notice of Meeting.

<Table>
                                              
By Order of the Board of Directors,

/s/ Rhondda E.S. Grant
RHONDDA E.S. GRANT
Vice-President and Corporate Secretary
Calgary, Alberta
March 15, 2004
</Table>

                                                      TRANSCANADA CORPORATION  2
<Page>
                                                                          [LOGO]

                           MANAGEMENT PROXY CIRCULAR

                              GENERAL INFORMATION

    THIS MANAGEMENT PROXY CIRCULAR ("PROXY CIRCULAR") IS FURNISHED IN CONNECTION
    WITH THE SOLICITATION OF PROXIES BY MANAGEMENT OF TRANSCANADA CORPORATION
    ("TRANSCANADA") TO BE USED AT THE ANNUAL AND SPECIAL MEETING (THE "MEETING")
    OF HOLDERS OF COMMON SHARES TO BE HELD IN CALGARY, ALBERTA ON FRIDAY,
    APRIL 23, 2004 AND AT ANY ADJOURNMENT THEREOF, FOR THE PURPOSES SET OUT IN
    THE ACCOMPANYING NOTICE OF ANNUAL AND SPECIAL MEETING (THE "NOTICE OF
    MEETING").

    The commencement of mailing to shareholders of this Proxy Circular,
    TransCanada's 2003 Annual Report and the form of proxy for shareholders will
    be March 15, 2004. The cost of soliciting proxies will be borne by
    TransCanada. While most proxies will be solicited by mail only, some
    shareholders may also be contacted by TransCanada employees personally or by
    telephone. In addition, TransCanada has retained Georgeson Shareholder
    Communications Canada, 66 Wellington Street West, T-D Tower, Suite 5210,
    Toronto Dominion Centre, P.O. Box 240, Toronto, Ontario, M5K 1J3 at a fee of
    approximately $40,000 plus out-of-pocket expenses to aid in the solicitation
    of proxies from individual and institutional investors in Canada and the
    U.S.

    TransCanada will provide proxy materials to brokers, custodians, nominees
    and fiduciaries and will request that such materials be promptly forwarded
    to the beneficial owners of common shares registered in the names of such
    brokers, custodians, nominees and fiduciaries.

    Unless otherwise stated, the information contained in this Proxy Circular is
    given as of the date hereof and all dollar amounts are in Canadian dollars.

    For those shareholders who cannot attend the Meeting in person, TransCanada
    has made arrangements to provide a live webcast of the Meeting. Details on
    how shareholders may listen to and view the proceedings on the webcast will
    be found on TransCanada's website at www.transcanada.com and will be
    provided in a news release prior to the Meeting.

    TransCanada's principal corporate and executive offices are located at
    450 - 1st Street S.W., Calgary, Alberta, T2P 5H1.

                             INFORMATION ON VOTING

RECORD DATE FOR NOTICE OF MEETING AND PROVISIONS RELATING TO VOTING

    The Board has fixed March 5, 2004 as the record date for the purpose of
    determining shareholders entitled to receive the Notice of Meeting.
    TransCanada will prepare, no later than 10 days following the record date,
    an alphabetical list of shareholders who are entitled to vote as of the
    record date, showing the number of common shares held by each such
    shareholder. Each person named on the list of shareholders is entitled to
    one vote for each share held. The list is available for inspection during
    usual business hours at the office of Computershare Trust Company of Canada
    ("Computershare"), Suite 600, 530 - 8th Avenue S.W., Calgary, Alberta,
    T2P 3S8 and will be available for inspection at the Meeting.

APPOINTMENT OF PROXY HOLDERS

    Shareholders wishing to be represented by proxy at the Meeting must deposit
    a properly executed proxy with Computershare prior to 4:30 p.m. (Eastern
    Daylight Time) on Wednesday, April 21, 2004.

                                                      TRANSCANADA CORPORATION  3
<Page>
    All common shares represented by a properly executed and deposited form of
    proxy will be voted or withheld from voting on the matters identified in the
    Notice of Meeting in accordance with the instructions of the shareholder as
    specified on the form of proxy.

    IF YOU HAVE APPOINTED A PERSON DESIGNATED BY TRANSCANADA TO ACT AND VOTE ON
    YOUR BEHALF AS PROVIDED IN THE ENCLOSED FORM OF PROXY AND YOU DO NOT PROVIDE
    ANY INSTRUCTIONS CONCERNING ANY MATTER IDENTIFIED IN THE NOTICE OF MEETING,
    THE COMMON SHARES REPRESENTED BY SUCH PROXY WILL BE VOTED:

       (i) FOR THE ELECTION OF THE PERSONS NOMINATED FOR ELECTION AS DIRECTORS;

       (ii) FOR THE APPOINTMENT OF KPMG LLP, CHARTERED ACCOUNTANTS, AS AUDITORS
           AND THE AUTHORIZATION OF THE DIRECTORS TO SET THEIR REMUNERATION;

       (iii) FOR THE APPROVAL OF AMENDMENTS TO THE STOCK OPTION PLAN, AS
           DESCRIBED IN THIS PROXY CIRCULAR; AND

       (iv) FOR THE CONTINUANCE AND RATIFICATION, CONFIRMATION AND APPROVAL OF
           THE SHAREHOLDER RIGHTS PLAN, AS DESCRIBED IN THIS PROXY CIRCULAR.

    The enclosed form of proxy, when properly signed, confers discretionary
    authority on the person or persons named to vote on any amendment to matters
    identified in the Notice of Meeting and on any other matter properly coming
    before the Meeting. Management is not aware of any such amendment or other
    matter. If, however, any such amendment or other matter properly comes
    before the Meeting, the proxies will be voted at the discretion of the
    person or persons named therein. The persons named in the form of proxy are
    either officers or directors of TransCanada.

VOTING ADVICE TO BENEFICIAL HOLDERS

    The information set forth in this section is of significant importance to
    many shareholders who do not hold their common shares in their own name.
    Only proxies deposited by shareholders whose names appear on the records of
    TransCanada as the registered holders of common shares can be recognized and
    acted upon at the Meeting. If common shares are listed in your account
    statement provided by your broker, then, in almost all cases, those common
    shares will not be registered in your name on the records of TransCanada.
    Such common shares will likely be registered under the name of your broker
    or an agent of that broker. In Canada, the vast majority of such shares are
    registered under the name of CDS & Co., the registration name for The
    Canadian Depository for Securities Limited, which acts as nominee for many
    Canadian brokerage firms. Common shares held by your broker or its nominee
    can only be voted upon your instructions. Without specific instructions,
    your broker, its agent or its nominee is prohibited from voting your common
    shares.

    THEREFORE, BENEFICIAL SHAREHOLDERS SHOULD ENSURE THAT INSTRUCTIONS
    RESPECTING THE VOTING OF THEIR COMMON SHARES ARE COMMUNICATED TO THE
    APPROPRIATE PERSON.

    Applicable regulatory policy requires your broker to seek voting
    instructions from you in advance of a shareholder meeting. Every broker has
    its own mailing procedures and provides its own return instructions, which
    you should carefully follow in order to ensure that your common shares are
    voted at the Meeting. Often, the form of proxy supplied by your broker is
    identical to the form of proxy provided to registered shareholders. However,
    its purpose is limited to instructing the registered shareholder how to vote
    on your behalf. The majority of brokers now delegate responsibility for
    obtaining instructions from clients to ADP Investor Communications ("ADP").
    ADP mails a voting instruction form in lieu of the form of proxy provided by
    TransCanada. The voting instruction form will name the same persons as the
    proxy to represent the shareholder at the Meeting. A shareholder has the
    right to appoint a person (who need not be a shareholder of TransCanada)
    other than the persons designated in the voting instruction form, to
    represent the shareholder at the Meeting. To exercise this right, the
    shareholder should insert the name of the desired representative in the
    blank space provided in the voting instruction form. You are asked to
    complete and return the voting instruction form to ADP by mail or facsimile.
    Alternately, you can call ADP's toll-free telephone number or access ADP's
    internet website to vote your common shares. ADP then tabulates the results
    of all instructions received and provides appropriate instructions
    respecting the voting of common

4  TRANSCANADA CORPORATION
<Page>
    shares to be represented at the Meeting. IF YOU RECEIVE A VOTING INSTRUCTION
    FORM FROM ADP, IT CANNOT BE USED AS A PROXY TO VOTE COMMON SHARES DIRECTLY
    AT THE MEETING AS THE VOTING INSTRUCTION FORM MUST BE RETURNED TO ADP WELL
    IN ADVANCE OF THE MEETING IN ORDER TO HAVE THE COMMON SHARES VOTED OR TO
    APPOINT AN ALTERNATIVE REPRESENTATIVE TO ATTEND AT THE MEETING IN PERSON TO
    VOTE SUCH COMMON SHARES.

    IF YOU ARE A BENEFICIAL SHAREHOLDER AND WISH TO VOTE IN PERSON AT THE
    MEETING, PLEASE CONTACT YOUR BROKER OR AGENT WELL IN ADVANCE OF THE MEETING
    TO DETERMINE HOW YOU CAN DO SO.

REVOCABILITY OF PROXIES

    A shareholder may revoke a proxy by depositing an instrument in writing
    executed by such shareholder or such shareholder's attorney authorized in
    writing (or, in the case of a corporation, by a duly authorized officer or
    attorney), either at the registered office of TransCanada, 450 - 1st Street
    S.W., Calgary, Alberta, T2P 5H1, Attention: Corporate Secretary, at any time
    up to and including the last business day preceding the day of the Meeting
    or any adjournment thereof, or with the Chair of the Meeting on the day of
    the Meeting or an adjournment thereof, or in any other manner permitted by
    law.

VOTING SHARES AND PRINCIPAL SHAREHOLDERS

    At February 24, 2004, there were 483,330,775 common shares outstanding. Each
    common share carries the right to one vote on any matter properly coming
    before the Meeting. The common shares are TransCanada's only class of
    outstanding shares.

    To the knowledge of the directors and officers of TransCanada, based on
    information at February 24, 2004, no individual or corporation beneficially
    owned, directly or indirectly, or exercised control or direction over, more
    than 10% of the outstanding common shares.

                    BUSINESS TO BE TRANSACTED AT THE MEETING

    This Proxy Circular contains information relating to the receipt of
    TransCanada's audited consolidated financial statements, the election of
    directors, the appointment of auditors, the approval of amendments to the
    Stock Option Plan, and the continuation and ratification, confirmation and
    approval of the Shareholder Rights Plan.

1.  FINANCIAL STATEMENTS

    The audited consolidated financial statements of TransCanada for the year
    ended December 31, 2003 and the report of the auditors thereon will be
    placed before the Meeting. These audited consolidated financial statements
    form part of the 2003 Annual Report of TransCanada, which was mailed to
    shareholders with the Notice of Meeting and Proxy Circular. Additional
    copies of the 2003 Annual Report, in English or French, may be obtained from
    the Corporate Secretary of TransCanada upon request and will be available at
    the Meeting.

2.  ELECTION OF DIRECTORS

    TransCanada's articles of incorporation provide for the Board to consist of
    a minimum of 10 and a maximum of 20 directors. The number of directors
    presently in office is 12. Mr. J.D. Thompson will retire effective
    April 23, 2004 and Mr. P.L. Joskow has been named as a new nominee for
    election.

    The Board has set the number of directors to be elected at the Meeting at
    12. The nominees for election as directors of TransCanada are:

<Table>
                                  
D.D. Baldwin                         P.L. Joskow
W.K. Dobson                          H.N. Kvisle
P. Gauthier                          D.P. O'Brien
R.F. Haskayne                        J.R. Paul
K.L. Hawkins                         H.G. Schaefer
S.B. Jackson                         W.T. Stephens
</Table>

                                                      TRANSCANADA CORPORATION  5
<Page>
    The Governance Committee of the Board reviews annually the qualifications of
    persons proposed for election to the Board and submits its recommendations
    to the Board for consideration. The persons proposed for nomination are, in
    the opinion of the Board, well qualified to act as directors for the ensuing
    year. Each nominee has established his or her eligibility and willingness to
    serve as a director if elected. Each director elected will hold office until
    the next annual meeting or until his or her successor is earlier elected or
    appointed.

    THE PERSONS NAMED IN THE FORM OF PROXY ARE EITHER OFFICERS OR DIRECTORS OF
    TRANSCANADA WHO INTEND TO VOTE AT THE MEETING FOR THE ELECTION OF THE
    NOMINEES WHOSE NAMES ARE SET FORTH ABOVE UNLESS SPECIFICALLY INSTRUCTED ON
    THE FORM OF PROXY TO WITHHOLD SUCH VOTE.

    Set forth in tabular form are the names of the 12 proposed nominees; their
    municipalities of residence; all positions and offices held by them with
    TransCanada; their principal occupations or employment during the past five
    years; the year from which each has continually served as a director of
    TransCanada, or TransCanada PipeLines Limited ("TCPL") prior to the 2003
    arrangement, or NOVA Corporation ("NOVA") prior to the 1998 merger, as
    applicable; and the number of each class of securities of TransCanada or any
    of its affiliates owned by each of them or over which control or direction
    is exercised by each of them:

<Table>
<Caption>
                                                                                                              SECURITIES OWNED,
                                                                                                                CONTROLLED OR
         PROPOSED NOMINEE(1)        PRINCIPAL OCCUPATION DURING THE PAST FIVE YEARS       DIRECTOR SINCE        DIRECTED(2)(3)
    ------------------------------  -----------------------------------------------      -----------------   --------------------
                                                                                                    

                                    Chairman, Talisman Energy Inc. (oil and gas) since         1999           225,865(4)(7)(10)
      [DOUGLAS D. BALDWIN PHOTO]    May 2003. President and Chief Executive Officer,
                                    TCPL, from August 1999 to April 2001. Director,
         Douglas D. Baldwin,        Calgary Airport Authority, Citadel Group of Funds,
               P. Eng.              Resolute Energy Inc. and UTS Energy Corporation.
           Calgary, Alberta         Member, Board of Governors, University of Calgary.

                                    Professor, Rotman School of Management and                 1992           21,965(5)(7)
         [WENDY DOBSON PHOTO]       Director, Institute for International Business,
                                    University of Toronto (education). Director,
           Wendy K. Dobson          MDS Inc., The Toronto-Dominion Bank and Vice Chair,
          Uxbridge, Ontario         Canadian Public Accountability Board.

                                    Senior Partner, Desjardins Ducharme Stein Monast           2002           9,052(7)
        [PAULE GAUTHIER PHOTO]      (law firm). Director, Royal Bank of Canada, The
                                    Royal Trust Corporation of Canada, The Royal Trust
       The Hon. Paule Gauthier,     Company, Rothmans Inc. and Metro Inc. Chair,
        P.C., O.C., O.Q., Q.C.      Security Intelligence Review Committee. President,
            Quebec, Quebec          Fondation de la Maison Michel Sarrazin and
                                    President, Institut Quebecois des Hautes Etudes
                                    Internationales, Laval University.
</Table>

6  TRANSCANADA CORPORATION
<Page>

<Table>
<Caption>
                                                                                                              SECURITIES OWNED,
                                                                                                                CONTROLLED OR
         PROPOSED NOMINEE(1)        PRINCIPAL OCCUPATION DURING THE PAST FIVE YEARS       DIRECTOR SINCE        DIRECTED(2)(3)
    ------------------------------  -----------------------------------------------      -----------------   --------------------
                                                                                                    

                                    Chairman of the Board, TransCanada. Prior to               1998           198,144(6)
     [RICHARD F. HASKAYNE PHOTO]    February 19, 2003, Chairman, Fording Inc. (coal      (director of NOVA
                                    and wollastonite). Director, EnCana Corporation and     since 1991)
         Richard F. Haskayne,       Weyerhaeuser Company.
             O.C., F.C.A.
           Calgary, Alberta

                                    President, Cargill Limited (grain handlers,                1996           22,152(7)(8)
       [KERRY L. HAWKINS PHOTO]     merchants, transporters, processors of agricultural
                                    products and gas marketers). Director, NOVA
           Kerry L. Hawkins         Chemicals Corporation, Shell Canada Limited and
          Winnipeg, Manitoba        Hudson's Bay Company.

                                    Chairman, Resolute Energy Inc. (oil and gas) since         2002           32,031(7)(9)
       [S. BARRY JACKSON PHOTO]     2002 and Chairman, Deer Creek Energy Limited since
                                    2001 (oil and gas). President and Chief Executive
           S. Barry Jackson         Officer, Crestar Energy Inc. (oil and gas), from
           Calgary, Alberta         1993 to 2000. Director, Nexen Inc.

                                    Professor, Department of Economics, Massachusetts          2004           5,000
        [PAUL L. JOSKOW PHOTO]      Institute of Technology (education). Director,
                                    National Grid Transco PLC and Whitehead Institute
            Paul L. Joskow          for Biomedical Research. Trustee of Putnam Mutual
       Cambridge, Massachusetts     Funds and President, Yale University Council.
</Table>

                                                      TRANSCANADA CORPORATION  7
<Page>

<Table>
<Caption>
                                                                                                              SECURITIES OWNED,
                                                                                                                CONTROLLED OR
         PROPOSED NOMINEE(1)        PRINCIPAL OCCUPATION DURING THE PAST FIVE YEARS       DIRECTOR SINCE        DIRECTED(2)(3)
    ------------------------------  -----------------------------------------------      -----------------   --------------------
                                                                                                    
                                    President and Chief Executive Officer, TCPL, since         2001           555,484(10)(11)
       [HAROLD N. KVISLE PHOTO]     May 2001 and TransCanada since May 2003. Executive
                                    Vice-President, Trading and Business Development,
          Harold N. Kvisle,         TCPL, from June 2000 to April 2001. Senior Vice-
               P. Eng.              President, Trading and Business Development, TCPL,
           Calgary, Alberta         from April 2000 to June 2000. Senior Vice-President
                                    and President, Energy Operations, TCPL, from
                                    September 1999 to April 2000. Prior to
                                    September 1999, President, Fletcher Challenge
                                    Energy Canada Inc. (oil and gas). Director, Norske
                                    Skog Canada Limited, PrimeWest Energy Inc.,
                                    TransCanada Power, L.P., Chair, Interstate National
                                    Gas Association of America and Chair, Mount
                                    Royal College.

                                    Chairman, EnCana Corporation since April 2002 (oil         2001           18,052(7)
       [DAVID P. O'BRIEN PHOTO]     and gas). Chairman and Chief Executive Officer,
                                    PanCanadian Energy Corporation (oil and gas), from
           David P. O'Brien         October 2001 to April 2002. Chairman, President and
           Calgary, Alberta         Chief Executive Officer, Canadian Pacific Limited,
                                    from May 1996 to October 2001 (energy,
                                    transportation and hotels). Director, Royal Bank of
                                    Canada, Fairmont Hotels & Resorts Inc., Inco
                                    Limited, Molson Inc., Profico Energy Management
                                    Ltd. and The E & P Limited Partnership.

                                    Chairman, James and Associates (private investment         1996           18,610(7)
        [JAMES R. PAUL PHOTO]       firm). Member of the Advisory Board, AMEC PLC.
            James R. Paul
           Kingwood, Texas

                                    President, Schaefer & Associates (business advisory        1987           37,826(7)(12)
      [HARRY G. SCHAEFER PHOTO]     services). Vice-Chairman of the Board, TransCanada,
                                    since 1998. Chairman, Crestar Energy Inc. (oil and
          Harry G. Schaefer,        gas), from May 1996 to November 2000. Director,
                F.C.A.              Agrium Inc. and Fording Canadian Coal Trust.
           Calgary, Alberta         Chairman, Alberta Chapter, Institute of Corporate
                                    Directors and Chair, The Mount Royal College
                                    Foundation.
</Table>

8  TRANSCANADA CORPORATION
<Page>

<Table>
<Caption>
                                                                                                              SECURITIES OWNED,
                                                                                                                CONTROLLED OR
         PROPOSED NOMINEE(1)        PRINCIPAL OCCUPATION DURING THE PAST FIVE YEARS       DIRECTOR SINCE        DIRECTED(2)(3)
    ------------------------------  -----------------------------------------------      -----------------   --------------------
                                                                                                    

                                    Corporate Director. Chief Executive Officer,               1999           22,800(7)
      [W. THOMAS STEPHENS PHOTO]    MacMillan Bloedel Limited (forest products), from
                                    October 1997 to October 1999. Director, Xcel
          W. Thomas Stephens        Energy Inc., Norske Skog Canada Limited, Qwest
     Greenwood Village, Colorado    Communications International Inc. and The Putnam
                                    Funds.
</Table>

    NOTES:

      (1) WITH THE EXCEPTION OF MESSRS. JOSKOW, PAUL, AND STEPHENS, WHO ARE
        U.S. RESIDENTS, ALL NOMINEES ARE CANADIAN RESIDENTS.

      (2) THE INFORMATION AS TO SHARES BENEFICIALLY OWNED OR OVER WHICH CONTROL
        OR DIRECTION IS EXERCISED, NOT BEING WITHIN THE KNOWLEDGE OF
        TRANSCANADA, HAS BEEN FURNISHED BY EACH OF THE NOMINEES. EXCEPT AS
        INDICATED IN THESE NOTES, THE NOMINEES HAVE SOLE VOTING AND DISPOSITIVE
        POWER WITH RESPECT TO THE SECURITIES LISTED ABOVE. AS TO EACH CLASS OF
        SHARES OF TRANSCANADA, THE PERCENTAGE OF OUTSTANDING SHARES BENEFICIALLY
        OWNED BY ANY ONE DIRECTOR OR NOMINEE OR BY ALL DIRECTORS AND OFFICERS OF
        TRANSCANADA AS A GROUP DOES NOT EXCEED 1% OF THE CLASS OUTSTANDING.

      (3) VOTING SECURITIES INCLUDE COMMON SHARES THAT CERTAIN OF THE DIRECTORS
        HAVE A RIGHT TO ACQUIRE THROUGH THE EXERCISE OF STOCK OPTIONS THAT ARE
        VESTED UNDER THE STOCK OPTION PLAN (SEE NOTES 6 AND 10), AND COMMON
        SHARES WHICH ELIGIBLE DIRECTORS MAY ACQUIRE UNDER THE SHARE UNIT PLAN
        FOR NON-EMPLOYEE DIRECTORS (1998) (SEE NOTE 7), BOTH OF WHICH PLANS ARE
        DESCRIBED ELSEWHERE IN THIS PROXY CIRCULAR.

      (4) THE SHARES LISTED ALSO INCLUDE 100 CUMULATIVE REDEEMABLE FIRST
        PREFERRED SHARES SERIES U AND 500 CUMULATIVE REDEEMABLE FIRST PREFERRED
        SHARES, SERIES Y OF TCPL, AND 2,000 UNITS OF TRANSCANADA POWER, L.P.

      (5) THE SHARES LISTED INCLUDE 1,000 UNITS OF TRANSCANADA POWER, L.P.

      (6) PART OF THE COMPENSATION OF THE DIRECTORS WHO WERE FORMERLY DIRECTORS
        OF NOVA WAS THE GRANTING OF OPTIONS UNDER NOVA'S STOCK OPTION PLAN. AS
        PART OF THE 1998 MERGER WITH NOVA, ALL NOVA OPTIONS WERE CONVERTED INTO
        OPTIONS OF BOTH NOVA CHEMICALS CORPORATION (A SEPARATE PUBLIC COMMODITY
        CHEMICALS COMPANY) AND TCPL. AS A RESULT, THE DIRECTORS WHO WERE
        FORMERLY DIRECTORS OF NOVA HOLD OPTIONS UNDER THE STOCK OPTION PLAN,
        WHICH IS OTHERWISE RESTRICTED TO EMPLOYEES OF TRANSCANADA. UNDER THE
        STOCK OPTION PLAN, MR. HASKAYNE HAS THE RIGHT TO ACQUIRE 39,072 SHARES.

      (7) UNDER THE SHARE UNIT PLAN FOR NON-EMPLOYEE DIRECTORS (1998), THESE
        DIRECTORS MAY ACQUIRE THE FOLLOWING COMMON SHARES: MR. BALDWIN -- 8,052
        SHARES, MS. DOBSON -- 17,965 SHARES, MRS. GAUTHIER -- 8,052 SHARES,
        MR. HAWKINS -- 18,355 SHARES, MR. JACKSON -- 3,031 SHARES,
        MR. O'BRIEN -- 8,052 SHARES AND MR. SCHAEFER -- 9,610 SHARES. MR. PAUL
        AND MR. STEPHENS, AS U.S. RESIDENTS, ARE INSTEAD ENTITLED TO RECEIVE THE
        CASH EQUIVALENT TO 9,610 AND 20,800 SHARES, RESPECTIVELY. A DIRECTOR
        CANNOT REDEEM DEFERRED SHARE UNITS UNTIL THE DIRECTOR CEASES TO BE A
        MEMBER OF THE BOARD.

      (8) THE SHARES LISTED INCLUDE 2,500 SHARES HELD BY MR. HAWKINS' WIFE.

      (9) THE SHARES LISTED INCLUDE 5,000 UNITS OF TRANSCANADA POWER, L.P. AND
        8,000 COMMON SHARES HELD BY MR. JACKSON'S WIFE.

     (10) MR. KVISLE, AS AN EMPLOYEE OF TRANSCANADA, HAS THE RIGHT TO ACQUIRE
        516,667 COMMON SHARES UNDER VESTED STOCK OPTIONS, WHICH AMOUNT IS
        INCLUDED IN THIS COLUMN. MR. BALDWIN, AS FORMER PRESIDENT AND CHIEF
        EXECUTIVE OFFICER OF TCPL, ALSO HAS THE RIGHT TO ACQUIRE 200,000 COMMON
        SHARES UNDER VESTED STOCK OPTIONS, WHICH AMOUNT IS INCLUDED IN THIS
        COLUMN.

     (11) MR. KVISLE, AS AN EMPLOYEE OF TRANSCANADA, PARTICIPATES IN THE
        EMPLOYEE STOCK SAVINGS PLAN WHICH IS DESCRIBED ELSEWHERE IN THIS PROXY
        CIRCULAR; HIS HOLDINGS IN THIS PLAN AND 1,000 UNITS OF TRANSCANADA
        POWER, L.P. ARE INCLUDED IN THIS COLUMN.

     (12) THE SHARES LISTED INCLUDE 700 COMMON SHARES HELD BY MR. SCHAEFER'S
        WIFE AND 5,500 COMMON SHARES HELD BY A COMPANY CONTROLLED BY
        MR. SCHAEFER'S WIFE. MR. SCHAEFER DISCLAIMS BENEFICIAL OWNERSHIP OF SUCH
        SHARES.

    Mr. Joseph D. Thompson will retire from the Board effective April 23, 2004.
    Management and the Board acknowledge with gratitude the valuable
    contributions of Mr. Thompson over the past nine years to the TransCanada
    board of directors. Mr. Paul L. Joskow has been named as a new nominee for
    election.

3.  APPOINTMENT OF AUDITORS

    The Board recommends that KPMG LLP, Chartered Accountants, be reappointed as
    TransCanada's auditors to hold office until the close of the next annual
    meeting and that the directors be authorized to fix their remuneration as
    such. KPMG LLP have served as the auditors of TransCanada since 1956. The

                                                      TRANSCANADA CORPORATION  9
<Page>
    appointment of auditors will be decided by a simple majority of votes cast
    by holders of common shares at the Meeting.

    The aggregate fees for professional services rendered by KPMG LLP for the
    TransCanada group of companies for the 2003 and 2002 fiscal years are shown
    in the table below:

<Table>
<Caption>
                                                                    2003       2002
                                                                  --------   --------
                                                                   Fees in millions
                                                                      of dollars
                                                                       
    Audit Fees..................................................   $1.80      $1.80
    Audit-Related Fees(1).......................................    0.05       0.02
    Tax Fees(2).................................................    0.06       0.10
    All Other Fees(3)...........................................    0.05       --
                                                                   -----      -----
    Total.......................................................   $1.96      $1.92
                                                                   =====      =====
</Table>

    NOTES:

      (1) AUDIT-RELATED FEES PRIMARILY RELATE TO AUDITS OF COMPANY APPROVED
        PENSION PLANS.

      (2) TAX FEES PRIMARILY RELATE TO TAX ADVICE AND COMPLIANCE.

      (3) ALL OTHER FEES PRIMARILY RELATE TO SARBANES-OXLEY ACT OF 2002
        COMPLIANCE WORK.

    Representatives of KPMG LLP will be present at the Meeting, will be given
    the opportunity to make a statement if they so wish and will respond to
    appropriate questions.

4.  AMENDMENTS TO THE STOCK OPTION PLAN

    In 1995 TCPL established the Key Employee Stock Incentive Plan (1995) (the
    "1995 Option Plan"). The 1995 Option Plan was subsequently amended, with the
    approval of the shareholders of that company, on May 19, 1998. As part of
    the Arrangement with TCPL effective May 15, 2003, a stock option plan (the
    "Stock Option Plan") was adopted by TransCanada with substantially the same
    terms and conditions as the 1995 Option Plan, as amended.

    The Toronto Stock Exchange (the "TSX") requires that a share compensation
    arrangement be affirmed by the affirmative votes of a simple majority of
    votes cast at the Meeting, excluding votes attaching to the common shares
    beneficially owned by insiders to whom the common shares may be issued
    pursuant to the Stock Option Plan and associates of these insiders. To the
    best of TransCanada's knowledge, 713,560 of the common shares are held by
    such insiders and their associates and will not be counted for the purpose
    of determining whether the required level of shareholder approval has been
    obtained.

    Shareholders will be asked at the Meeting to consider and, if deemed
    advisable, to approve, by a simple majority of votes cast at the Meeting
    (other than votes attaching to the common shares beneficially owned by
    insiders to whom the common shares may be issued pursuant to the Stock
    Option Plan, or associates of such insiders) a resolution, the text of which
    is set out in Schedule "A" of this Proxy Circular (the "Option Plan
    Resolution") to approve certain amendments to the Stock Option Plan. See
    "Report on Executive Compensation -- Long-Term Incentive Plans -- Stock
    Option Plan". If the Option Plan Resolution is not passed, the Stock Option
    Plan will continue on the same terms as it was the day before the Meeting.

    The Board of Directors has approved, subject to shareholder approval,
    certain amendments to the Stock Option Plan, the effects of which are as
    follows:

     i) to confirm the Stock Option Plan in place until the close of business on
        the date of TransCanada's 2007 annual meeting of common shareholders.
        Currently, the Stock Option Plan has an expiry date of December 31,
        2004; and

     ii) to increase by 1,000,000 the total number of common shares reserved for
         issuance under the Stock Option Plan.

    When it was established, 10,000,000 common shares were reserved for issuance
    under the 1995 Option Plan. An additional 15,000,000 common shares were
    reserved for issuance under the 1995 Option Plan at the time

10  TRANSCANADA CORPORATION
<Page>
    of the merger with NOVA Corporation on July 2, 1998. There are currently
    3,675,445 common shares reserved for issuance under future awards of options
    under the Stock Option Plan.

    Shareholders are being requested to approve an increase in the number of
    common shares reserved for issuance under the Stock Option Plan by
    1,000,000. This is considered a sufficient number of common shares to
    adequately provide for all option awards for the next three years.
    Shareholders will be asked to approve the Stock Option Plan in another three
    years.

    The Board of Directors unanimously recommends that shareholders vote in
    favour of the Option Plan Resolution.

5.  APPROVAL OF THE SHAREHOLDER RIGHTS PLAN

    On December 2, 1994, TCPL implemented its Shareholder Rights Plan (the
    "Shareholder Rights Plan"). The Shareholder Rights Plan was subsequently
    amended, with the approval of the shareholders of that company, as of
    April 7, 1995, May 19, 1998, and April 27, 2001. As part of the Arrangement
    with TCPL effective May 15, 2003, the Shareholder Rights Plan was adopted by
    TransCanada with substantially the same terms and conditions as the TCPL
    Shareholder Rights Plan.

    Shareholders will be asked at the Meeting to consider and, if deemed
    advisable, to approve, by a simple majority of votes cast at the Meeting, a
    resolution, the text of which is set forth in Schedule "B" of this Proxy
    Circular (the "Rights Plan Resolution"), to continue and ratify, confirm and
    approve the Shareholder Rights Plan. For the Shareholder Rights Plan to
    continue in effect after the Meeting, the Rights Plan Resolution must be
    passed by a majority vote of common shareholders represented at the Meeting.
    If the Rights Plan Resolution is not passed, the Rights Plan will terminate.

    The Board of Directors has determined that the Shareholder Rights Plan
    continues to be in the best interests of TransCanada and the shareholders.
    The Board of Directors unanimously recommends that shareholders vote in
    favour of the Rights Plan Resolution. A summary of the Shareholder Rights
    Plan is also set out in Schedule "B" to this Proxy Circular.

6.  SHAREHOLDER PROPOSALS

    Pursuant to Canadian law, shareholder proposals to be considered for
    inclusion in the management proxy circular for the 2005 annual meeting of
    holders of common shares must be received by the Corporate Secretary of
    TransCanada on or before the close of business on December 24, 2004. No
    shareholder proposals were received in respect of the Meeting.

                       COMPENSATION AND OTHER INFORMATION

COMPENSATION OF DIRECTORS

    TransCanada's directors also serve as directors of TCPL. An aggregate fee is
    paid for serving on the board of TransCanada and for serving on the board of
    TCPL. Since TransCanada does not hold any assets directly other than the
    common shares of TCPL and does not raise public debt, all directors' costs
    are assumed by TCPL according to a management services agreement between the
    two companies.

GENERAL

    TransCanada's directors' compensation practices are designed to reflect the
    size and complexity of TransCanada and to reinforce the emphasis TransCanada
    places on shareholder value by linking a portion of directors' compensation
    to the value of common shares. TransCanada requires each director to acquire
    and hold a minimum number of common shares equal in value to five times the
    director's annual cash retainer fee. Directors have a maximum of five years
    to reach this level of share ownership. The level of ownership can be
    achieved by direct purchase of common shares, by participation in the
    TransCanada Dividend Reinvestment Plan or by means of directing cash
    retainer fees into, or otherwise acquiring units under, the Share Unit Plan
    for Non-Employee Directors (1998) (the "DSU Plan"), described elsewhere in
    this Proxy Circular. All directors hold the minimum number of common shares.

                                                     TRANSCANADA CORPORATION  11
<Page>
BOARD AND COMMITTEE REMUNERATION

    For the financial year ended December 31, 2003, each director who was not an
    employee of TransCanada, other than the Chair, was paid in quarterly
    instalments in arrears as follows:

<Table>
                                                           
Retainer fee................................................  $27,000 per annum
Committee retainer fee......................................  $3,000 per annum
Committee Chair retainer fee................................  $4,000 per annum
Board and Committee attendance fee..........................  $1,500 per meeting
Committee Chair attendance fee..............................  $1,500 per meeting
</Table>

    The Chair, who was paid none of the directors' fees outlined above, was paid
    a retainer fee of $300,000 per annum in respect of his duties as Chair,
    $3,000 per chaired board meeting, and was reimbursed for certain office and
    other expenses. The Vice-Chair was paid a retainer fee of $12,000 per annum
    in respect of his duties as Vice-Chair, in addition to his other director's
    fees as outlined above. Additionally, directors other than the Chair and any
    director who is an employee of TransCanada, receive in respect of their
    service as directors, an annual grant of units under the DSU Plan. See
    "Deferred Share Unit Plan for Directors". Fees are paid quarterly and are
    pro-rated from the date of the director's appointment to the Board and the
    relevant committees.

    TransCanada pays a travel fee of $1,500 per meeting for which round trip
    travel time exceeds three hours, and reimburses the directors for
    out-of-pocket expenses incurred in attending such meetings. Directors who
    are U.S. residents are paid the same amounts as outlined above in
    U.S. dollars.

                     CASH FEES PAID TO DIRECTORS IN 2003(1)

<Table>
<Caption>
                                              COMMITTEE     COMMITTEE        BOARD      COMMITTEE
                                   RETAINER   RETAINER    CHAIR RETAINER   ATTENDANCE   ATTENDANCE    TRAVEL    TOTAL FEES
    NAME                             FEE         FEE           FEE            FEE          FEE         FEE         PAID
    ----                           --------   ---------   --------------   ----------   ----------   --------   ----------
                                                                                           
    Douglas Baldwin(2)...........  $ 27,000    $6,000         $4,000         $16,500     $16,500     $ 1,500     $ 71,500
    Wendy Dobson(2)..............    27,000     6,000          4,000          16,500      12,000       9,000       74,500
    Paule Gauthier...............    27,000     6,000            N/A          18,000      13,500      10,500       75,000
    Richard Haskayne(3)..........   339,000       N/A            N/A             N/A         N/A       1,500      340,500
    Kerry Hawkins(2).............    27,000     6,000          4,000          18,000      19,500      12,000       86,500
    Barry Jackson................    27,000     6,000            N/A          19,500      13,500       1,500       67,500
    David O'Brien................    27,000     6,000            N/A          13,500       4,500       1,500       52,500
    James Paul(4)................    27,000     6,000            N/A          19,500      12,000      10,500       75,000
    Harry Schaefer(2)(5).........    39,000     6,000         25,647          19,500      21,000         N/A       89,500
    W. Thomas Stephens(4)........    27,000     6,000            N/A          19,500       9,000      12,000       73,500
    Joseph Thompson..............    27,000     6,000            N/A          18,000      10,500      12,000       73,500
</Table>

    NOTES:

     (1)  FEES ARE AGGREGATE AMOUNTS RESPECTING DUTIES PERFORMED ON BOTH
        TRANSCANADA AND TCPL BOARDS.

     (2)  THE COMMITTEE CHAIR RETAINER FEE AMOUNT INCLUDES FEES PAID IN ADDITION
        TO THE COMMITTEE RETAINER FEE IN RESPECT OF DUTIES PERFORMED AND
        MEETINGS HELD IN PREPARATION FOR COMMITTEE MEETINGS.

     (3)  THE RETAINER FEE AMOUNT INCLUDES THE FEE OF $3,000 IN RESPECT OF EACH
        BOARD MEETING CHAIRED.

     (4)  U.S. DIRECTORS ARE PAID THESE DOLLAR AMOUNTS IN U.S. DOLLARS.

     (5)  THE RETAINER FEE AMOUNT INCLUDES THE FEE OF $12,000 IN RESPECT OF
        DUTIES PERFORMED AS VICE-CHAIR.

DEFERRED SHARE UNIT PLAN FOR DIRECTORS

    The Share Unit Plan for Non-Employee Directors (1998) was established in
    1998 and was amended and restated in October 2000. The DSU Plan allows
    eligible Board members, on a quarterly basis, to direct their annual
    directors' retainer fee or, at the discretion of the Governance Committee,
    other board-related fees, to acquire units representing the right to acquire
    common shares. The DSU Plan also allows for grants of units as additional
    directors' compensation; these grants are made annually to the directors
    other than the

12  TRANSCANADA CORPORATION
<Page>
    Chair and the President and Chief Executive Officer. In September 2003, a
    grant of 3,000 DSU units per eligible director was made.

    Initially the value of a DSU unit is equal to the market value of a common
    share at the time the directors are credited with the units. Thus the grant
    of 3,000 DSU units in September 2003 had an initial cash value of
    approximately $75,390. The value of a DSU unit, when redeemed, is equivalent
    to the market value of a common share at the time the redemption takes
    place. In addition, at the time dividends are declared on the common shares
    each DSU unit accrues an amount equal to such dividends, which amount is
    then reinvested at such time in additional DSU units at a price equal to the
    market value of a common share. DSU units do not vest until the director
    ceases to be a member of the Board.

COMPENSATION OF OFFICERS

    TransCanada's officers also serve as officers of TCPL. An aggregate
    remuneration is paid for serving as an officer of TransCanada and for
    serving as an officer of TCPL. Since TransCanada does not hold any assets
    directly other than the common shares of TCPL and does not raise public
    debt, all officers' costs are assumed by TCPL according to a management
    services agreement between the two companies.

SUMMARY COMPENSATION TABLE

    The following table provides a summary of the remuneration earned by the
    President and Chief Executive Officer and the four other most highly
    compensated policy-making executive officers of TransCanada serving at
    December 31, 2003 (collectively, the "Named Executive Officers"), for
    services rendered in all capacities during the financial years ended
    December 31, 2003, 2002 and 2001. The summary of the remuneration also
    includes stock options awarded under the Stock Option Plan and units awarded
    under the Executive Share Unit Plan on February 23, 2004 which awards are
    attributable, in part, to 2003 performance. Specific aspects of this
    compensation are described in the following tables.

<Table>
<Caption>
    ------------------------------------------------------------------------------------------------------------------------------
                                                ANNUAL COMPENSATION                    LONG-TERM COMPENSATION
                                 -------------------------------------------------   ---------------------------
                                                                                               AWARDS
                                                                                     ---------------------------
                                                                                     SECURITIES
                                                                        OTHER          UNDER
    NAME AND PRINCIPAL POSITION                                        ANNUAL         OPTIONS       RESTRICTED        ALL OTHER
    OF THE NAMED EXECUTIVE                   SALARY    BONUS(1)    COMPENSATION(2)   GRANTED(3)   SHARE UNITS(4)   COMPENSATION(5)
    OFFICERS                       YEAR       ($)         ($)            ($)            (#)            ($)               ($)
                                                                                              
    ------------------------------------------------------------------------------------------------------------------------------
    H.N. Kvisle                    2003     772,503      900,000        69,108       165,000         1,961,538          53,915
    President and                  2002     726,252    1,000,000        93,230       200,000         1,095,000               0
    Chief Executive Officer        2001     627,091      959,000        32,999       250,000(6)              0               0
    ------------------------------------------------------------------------------------------------------------------------------
    R.K. Girling                   2003     443,751      430,000        39,611       60,000            784,570          21,566
    Executive Vice-President,      2002     420,003      480,000        26,904       80,000            438,000           6,575
    Corporate Development and      2001     395,001      440,000        26,812       65,000                  0           6,561
      Chief Financial Officer
    ------------------------------------------------------------------------------------------------------------------------------
    A.J. Pourbaix                  2003     382,506      430,000        51,638       60,000            700,552          21,566
    Executive Vice-President,      2002     322,500      480,000        14,790       80,000            438,000           6,575
    Power                          2001     290,001      440,000        13,487       65,000                  0               0
    ------------------------------------------------------------------------------------------------------------------------------
    R.J. Turner                    2003     447,501      300,000        64,233       40,000            577,272          16,175
    Executive Vice-President,      2002     436,254      340,000        41,420       60,000            328,500               0
    Gas Transmission               2001     412,503      340,000        45,453       50,000                  0               0
    ------------------------------------------------------------------------------------------------------------------------------
    D.J. McConaghy                 2003     337,506      400,000        43,595       60,000            616,534          16,175
    Executive Vice-President,      2002     322,500      310,000        56,043       60,000            328,500               0
    Gas Development                2001     265,000      260,000        34,970       45,000                  0               0
    ------------------------------------------------------------------------------------------------------------------------------
</Table>

    NOTES:

     (1)  AMOUNTS REFERRED TO IN THIS TABLE AS "BONUS" ARE PAID PURSUANT TO
        TRANSCANADA'S INCENTIVE COMPENSATION PROGRAM. SEE "REPORT ON EXECUTIVE
        COMPENSATION -- SHORT-TERM INCENTIVE COMPENSATION".

                                                     TRANSCANADA CORPORATION  13
<Page>
     (2)  THE AMOUNTS IN THIS COLUMN INCLUDE THE VALUE OF SALARY PAID IN LIEU OF
        VACATION AND THESE NAMED EXECUTIVES OFFICERS RECEIVED THE FOLLOWING IN
        2003: MR. KVISLE -- $28,270, MR. TURNER -- $42,308; AND IN 2002:
        MR. KVISLE -- $53,848 AND MR. MCCONAGHY -- $24,231. ALSO, THIS COLUMN
        INCLUDES AMOUNTS PAID TO THE NAMED EXECUTIVE OFFICERS BY WAY OF FLEX
        BENEFIT CREDITS APPLIED TO THE EMPLOYEE STOCK SAVINGS PLAN,
        SPECIFICALLY, IN 2003: MR. KVISLE -- $31,772, MR. POURBAIX -- $14,771
        AND MR. TURNER -- $17,388; AND IN 2002: MR. KVISLE -- $32,135 AND
        MR. MCCONAGHY -- $14,200. IN ADDITION, THE AMOUNTS INCLUDE PAYMENTS MADE
        TO THE NAMED EXECUTIVE OFFICERS BY SUBSIDIARIES AND AFFILIATES OF
        TRANSCANADA (INCLUDING DIRECTORS' FEES PAID BY AFFILIATES AND AMOUNTS
        PAID FOR SERVING ON MANAGEMENT COMMITTEES OF PARTNERSHIPS IN WHICH
        TRANSCANADA HOLDS AN INTEREST), SPECIFICALLY: MR. POURBAIX -- $22,917
        (DIRECTORS' FEES PAID BY AN AFFILIATE).

     (3)  THIS COLUMN SHOWS THE NUMBER OF STOCK OPTIONS AWARDED UNDER THE STOCK
        OPTION PLAN TO EACH OF THE NAMED EXECUTIVE OFFICERS FOR EACH OF THE
        FINANCIAL YEARS. A SIMILAR NUMBER OF PERFORMANCE UNITS WERE GRANTED IN
        2002 AND 2001 UNDER THE PERFORMANCE UNIT PLAN. SEE "REPORT ON EXECUTIVE
        COMPENSATION -- PERFORMANCE UNIT PLAN". FOR THE MOST RECENT YEAR, THE
        STOCK OPTION AWARD WAS APPROVED IN FEBRUARY 2004 AND IS ATTRIBUTABLE TO
        THE NAMED EXECUTIVE OFFICER'S 2003 AND EXPECTED FUTURE CONTRIBUTIONS; NO
        CORRESPONDING PERFORMANCE UNITS WERE GRANTED. OPTIONS AWARDED FOR THE
        2002 AND 2001 CALENDAR YEARS ARE DESCRIBED IN THE MANAGEMENT PROXY
        CIRCULAR DATED FEBRUARY 25, 2003 AND FEBRUARY 26, 2002, RESPECTIVELY.
        THE STOCK OPTION PLAN IS DESCRIBED UNDER "REPORT ON EXECUTIVE
        COMPENSATION -- STOCK OPTION PLAN".

     (4)  THE AMOUNTS IN THIS COLUMN WERE REPORTED IN THE COLUMN "ALL OTHER
        COMPENSATION" IN PREVIOUS YEARS AND REFLECT THE DOLLAR VALUE OF UNITS
        AWARDED UNDER THE EXECUTIVE SHARE UNIT PLAN TO EACH OF THE NAMED
        EXECUTIVE OFFICERS FOR EACH OF THE FINANCIAL YEARS. THE DOLLAR VALUE IS
        DETERMINED BY MULTIPLYING THE NUMBER OF UNITS AWARDED BY THE CLOSING
        MARKET PRICE OF THE COMMON SHARES ON THE DATE OF THE AWARD. IN ADDITION,
        AT THE TIME DIVIDENDS ARE DECLARED ON THE COMMON SHARES EACH UNIT
        ACCRUES AN AMOUNT EQUAL TO SUCH DIVIDENDS, WHICH AMOUNT IS THEN
        REINVESTED AT SUCH TIME IN ADDITIONAL UNITS AT A PRICE EQUAL TO THE
        MARKET VALUE OF A COMMON SHARE. FOR THE MOST RECENT YEAR, THE AWARD OF
        UNITS WAS APPROVED IN FEBRUARY 2004 AT AN AWARD PRICE OF $26.80. THE
        INITIAL AWARD OF UNITS UNDER THE EXECUTIVE SHARE UNIT PLAN APPROVED IN
        FEBRUARY 2003 IS DESCRIBED IN THE MANAGEMENT PROXY CIRCULAR DATED
        FEBRUARY 25, 2003. VESTING OF ANY OR ALL OF THESE UNITS IS PERFORMANCE
        BASED, AND AS SUCH A DISCOUNT FACTOR WAS APPLIED WHEN DETERMINING THE
        NUMBER OF UNITS AWARDED FOR EACH OF THE FINANCIAL YEARS. SEE "REPORT ON
        EXECUTIVE COMPENSATION -- EXECUTIVE SHARE UNIT PLAN". THE AGGREGATE
        NUMBER OF UNITS HELD AT DECEMBER 31, 2003 AND THEIR VALUES AT THEIR
        RESPECTIVE AWARD DATES ARE AS FOLLOWS:

<Table>
<Caption>
          ---------------------------------------------------------------------------------------------------------
                                                              RESTRICTED SHARE UNITS                VALUE AT
                                                            HELD AT DECEMBER 31, 2003              AWARD DATE
                                                                        #                              $
                                                                                       
          ---------------------------------------------------------------------------------------------------------
          H.N. Kvisle                                             52,210                           $1,148,915
          ---------------------------------------------------------------------------------------------------------
          R.K. Girling                                            20,884                              459,566
          ---------------------------------------------------------------------------------------------------------
          A.J. Pourbaix                                           20,884                              459,566
          ---------------------------------------------------------------------------------------------------------
          R.J. Turner                                             15,663                              344,675
          ---------------------------------------------------------------------------------------------------------
          D.J. McConaghy                                          15,663                              344,675
          ---------------------------------------------------------------------------------------------------------
</Table>

     (5)  THE AMOUNTS IN THE COLUMN "RESTRICTED SHARE UNITS" WERE REPORTED IN
        THIS COLUMN IN THE MANAGEMENT PROXY CIRCULAR DATED FEBRUARY 25, 2003.
        FOR 2003, THE AMOUNTS IN THIS COLUMN INCLUDE THE VALUE OF ADDITIONAL
        UNITS ACQUIRED THROUGH THE REINVESTMENT OF DIVIDEND EQUIVALENTS ACCRUED
        ON OUTSTANDING UNITS UNDER THE EXECUTIVE SHARE UNIT PLAN. FOR 2002 AND
        2001, THE AMOUNTS IN THIS COLUMN ALSO INCLUDE AMOUNTS CONTRIBUTED BY
        TRANSCANADA TO THE NAMED EXECUTIVE OFFICER UNDER THE DEFINED
        CONTRIBUTION PENSION PLAN. SEE "PENSION AND RETIREMENT BENEFITS".

     (6)  MR. KVISLE WAS APPOINTED PRESIDENT AND CHIEF EXECUTIVE OFFICER OF TCPL
        ON MAY 1, 2001 AND RECEIVED AN AWARD OF 100,000 STOCK OPTIONS UPON
        APPOINTMENT.

LONG-TERM INCENTIVE PLANS

PERFORMANCE UNIT PLAN ACCRUALS FOR 2003

    The following table sets forth information regarding Performance Unit Plan
    awards made to the Named Executive Officers. Effective December 31, 2002 no
    further awards will be made under the Performance Unit Plan. The estimated
    future payouts set out in the table include all accruals up to and including
    the

14  TRANSCANADA CORPORATION
<Page>
    accrual approved on February 23, 2004 which accrual is attributable to 2003
    performance. See "Report on Executive Compensation -- Performance Unit Plan"
    for information with respect to this plan.

<Table>
<Caption>
    -----------------------------------------------------------------------------------------------------------------
                                                                                  ESTIMATED FUTURE PAYOUTS UNDER
                                                                                NON-SECURITIES PRICE-BASED PLANS(3)
                                                                              ---------------------------------------
                                       UNITS(1)         PERIOD UNTIL          THRESHOLD        TARGET        MAXIMUM
    NAME                                 (#)            MATURATION(2)         ($ OR #)        ($ OR #)         ($)
                                                                                              
    -----------------------------------------------------------------------------------------------------------------
    H.N. Kvisle                        150,000        February 25, 2012          N/A            N/A          305,250
                                       100,000        March 20, 2011             N/A            N/A          293,500
                                        42,500        February 27, 2011          N/A            N/A          124,738
                                        55,000        February 28, 2010          N/A            N/A          209,825
                                        50,000        February 1, 2010           N/A            N/A          190,750
                                        90,000        September 1, 2009          N/A            N/A          343,350
    -----------------------------------------------------------------------------------------------------------------
    R.K. Girling                        65,000        February 25, 2012          N/A            N/A          132,275
                                        45,000        February 27, 2011          N/A            N/A          132,075
                                        45,000        February 28, 2010          N/A            N/A          171,675
                                        50,000        February 1, 2010           N/A            N/A          190,750
                                        20,000        July 29, 2009              N/A            N/A           76,300
                                        25,000        March 1, 2009              N/A            N/A           95,375
                                        25,000        December 3, 2008           N/A            N/A           95,375
                                        25,162        December 9, 2007           N/A            N/A          126,439
    -----------------------------------------------------------------------------------------------------------------
    A.J. Pourbaix                       65,000        February 25, 2012          N/A            N/A          132,275
                                        35,000        February 27, 2011          N/A            N/A          102,725
                                        20,000        February 28, 2010          N/A            N/A           76,300
                                        20,000        February 1, 2010           N/A            N/A           76,300
                                        20,000        March 1, 2009              N/A            N/A           76,300
                                        17,500        December 3, 2008           N/A            N/A           66,763
    -----------------------------------------------------------------------------------------------------------------
    R.J. Turner                         50,000        February 25, 2012          N/A            N/A          101,750
                                        42,500        February 27, 2011          N/A            N/A          124,738
                                        35,000        February 28, 2010          N/A            N/A          133,525
                                        50,000        February 1, 2010           N/A            N/A          190,750
                                        20,000        July 29, 2009              N/A            N/A           76,300
                                        40,000        March 1, 2009              N/A            N/A          152,600
    -----------------------------------------------------------------------------------------------------------------
    D.J. McConaghy                      45,000        February 25, 2012          N/A            N/A           91,575
                                        35,000        February 27, 2011          N/A            N/A          102,725
                                        20,000        February 28, 2010          N/A            N/A           76,300
                                        20,000        February 1, 2010           N/A            N/A           76,300
                                        17,500        March 1, 2009              N/A            N/A           66,763
    -----------------------------------------------------------------------------------------------------------------
</Table>

    NOTES:

     (1)  AS NO FURTHER AWARDS WILL BE MADE UNDER THIS PLAN, IT WILL BE PHASED
        OUT OVER THE 10-YEAR LIFE OF THE OUTSTANDING UNITS.

     (2)  THE EXERCISE PERIOD FOR ALL UNITS COMMENCES UPON VESTING, WHICH IS THE
        THIRD ANNIVERSARY OF THE AWARD DATE AND EXPIRES ON THE TENTH ANNIVERSARY
        OF THE AWARD DATE, WITH THE EXCEPTION OF THE PERFORMANCE UNITS MATURING
        ON FEBRUARY 1, 2010 GRANTED UNDER A ONE TIME SPECIAL PERFORMANCE
        INCENTIVE PROGRAM, WHICH VESTED ON FEBRUARY 22, 2002. SEE "REPORT ON
        EXECUTIVE COMPENSATION -- PERFORMANCE UNIT PLAN".

     (3)  THE HUMAN RESOURCES COMMITTEE OF THE BOARD DETERMINED IN
        FEBRUARY 2004 THAT $1.06 WILL ACCRUE FOR 2003 IN RESPECT OF THE AWARDS
        MADE FROM 1995 TO 2002, WHICH AWARDS ARE REFERRED TO BEGINNING AT THE
        FIRST LINE FOR EACH NAMED EXECUTIVE OFFICER. THE AMOUNTS REFERRED TO
        HEREIN MAY NEVER BE RECEIVED BY THE NAMED EXECUTIVE OFFICERS. SEE
        "REPORT ON EXECUTIVE COMPENSATION -- PERFORMANCE UNIT PLAN".

OPTIONS GRANTED FOR 2003

    The following table sets forth the stock options under the Stock Option Plan
    earned and awarded to each of the Named Executive Officers for 2003 and for
    their expected future contributions. See "Report on Executive
    Compensation -- Stock Option Plan" for information with respect to this
    plan. Options awarded in 2003 and attributable to the executive's
    performance for the 2002 calendar year are reported in the

                                                     TRANSCANADA CORPORATION  15
<Page>
    Management Proxy Circular dated February 25, 2003 and in this Proxy Circular
    under "Compensation of Officers -- Summary Compensation Table".

<Table>
<Caption>
    -----------------------------------------------------------------------------------------------------------------
                                                                                MARKET VALUE OF
                                                   % OF TOTAL                    COMMON SHARES
                                  NUMBER OF          OPTIONS       EXERCISE        UNDERLYING
                                COMMON SHARES      GRANTED TO        PRICE       OPTIONS ON THE
                                UNDER OPTIONS     EMPLOYEES FOR    ($/COMMON     DATE OF GRANT
    NAME                          GRANTED(1)          2003         SHARE)(2)    ($/COMMON SHARE)     EXPIRATION DATE
                                                                                     
    -----------------------------------------------------------------------------------------------------------------
    H.N. Kvisle                    165,000            12.02          26.85           26.80          February 23, 2011
    -----------------------------------------------------------------------------------------------------------------
    R.K. Girling                    60,000             4.37          26.85           26.80          February 23, 2011
    -----------------------------------------------------------------------------------------------------------------
    A.J. Pourbaix                   60,000             4.37          26.85           26.80          February 23, 2011
    -----------------------------------------------------------------------------------------------------------------
    R.J. Turner                     40,000             2.91          26.85           26.80          February 23, 2011
    -----------------------------------------------------------------------------------------------------------------
    D.J. McConaghy                  60,000             4.37          26.85           26.80          February 23, 2011
    -----------------------------------------------------------------------------------------------------------------
</Table>

    NOTES:

     (1)  ANNUAL OPTION AWARDS UNDER THE STOCK OPTION PLAN AWARDED TO THE NAMED
        EXECUTIVE OFFICERS IN RELATION TO THE 2003 CALENDAR YEAR AND EXPECTED
        FUTURE CONTRIBUTIONS WERE APPROVED BY THE HUMAN RESOURCES COMMITTEE OF
        THE BOARD ON FEBRUARY 23, 2004 AND ARE REFLECTED IN THIS PROXY CIRCULAR.
        THESE OPTIONS VEST AND ARE EXERCISABLE AS TO 33 1/3% ON EACH ANNIVERSARY
        OF THE AWARD DATE FOR A PERIOD OF THREE YEARS.

     (2)  THE EXERCISE PRICE IS EQUAL TO THE HIGHER OF THE CLOSING PRICE OF
        COMMON SHARES ON THE AWARD DATE AND THE WEIGHTED AVERAGE CLOSING PRICE
        OF COMMON SHARES ON THE TSX DURING THE FIVE TRADING DAYS IMMEDIATELY
        PRIOR TO THE AWARD DATE OF THE OPTIONS.

AGGREGATE OPTION EXERCISES DURING 2003 AND 2003 YEAR-END OPTION VALUES

    The following table summarizes, for each of the Named Executive Officers,
    the number of stock options, if any, exercised during the financial year
    ended December 31, 2003, the aggregate value realized upon exercise, the
    total number of unexercised options, if any, and the value of unexercised
    "in-the-money" options at December 31, 2003. This table does not include the
    stock options awarded on February 23, 2004 which award is included in the
    Summary Compensation Table. The value of unexercised "in-the-money" options
    at the financial year end is the difference between the exercise price and
    the closing price of $27.88 per share of a common share on the TSX on
    December 31, 2003. The underlying options have not been and will not
    necessarily be exercised and the actual gains, if any, on exercise will
    depend on the value of common shares on the date of exercise.

<Table>
<Caption>
    ------------------------------------------------------------------------------------------------------------------------
                                                                                                    VALUE OF UNEXERCISED
                                      COMMON                       UNEXERCISED OPTIONS AT         IN-THE-MONEY OPTIONS AT
                                      SHARES       AGGREGATE         DECEMBER 31, 2003               DECEMBER 31, 2003
                                     ACQUIRED        VALUE                  (#)                             ($)
                                    ON EXERCISE    REALIZED     ----------------------------    ----------------------------
    NAME                                (#)           ($)       EXERCISABLE    UNEXERCISABLE    EXERCISABLE    UNEXERCISABLE
                                                                                             
    ------------------------------------------------------------------------------------------------------------------------
    H.N. Kvisle                             0             0       376,875         310,625        3,791,906       1,913,119
    ------------------------------------------------------------------------------------------------------------------------
    R.K. Girling                            0             0       256,412         123,750        2,723,443         764,662
    ------------------------------------------------------------------------------------------------------------------------
    A.J. Pourbaix                      20,000       309,030        96,250         121,250          702,737         739,988
    ------------------------------------------------------------------------------------------------------------------------
    R.J. Turner                        35,000       454,200       187,225          95,625        1,904,179         599,119
    ------------------------------------------------------------------------------------------------------------------------
    D.J. McConaghy                          0             0       153,624          91,250        1,619,927         564,488
    ------------------------------------------------------------------------------------------------------------------------
</Table>

PENSION AND RETIREMENT BENEFITS

    The Named Executive Officers participate in the Registered Pension Plan and
    the Executive Supplemental Pension Plan which are both non-contributory
    defined benefit pension plans. The Registered Pension Plan previously
    provided three benefit options, a defined benefit, a defined contribution
    and a combination option (defined benefit and defined contribution). The
    Registered Pension Plan was amended effective October 1, 2001 eliminating
    the combination option for new members. The Registered Pension Plan was
    amended January 1, 2003 to eliminate the defined contribution option.
    Credited service and benefits of all

16  TRANSCANADA CORPORATION
<Page>
    previous defined contribution participants has been recognized in the
    defined benefit plan as if such participant had always participated in the
    defined benefit plan.

    The defined benefit plan is integrated with Canada Pension Plan benefits.
    The benefit calculation is based on: 1.25% of a person's highest average
    pensionable earnings up to the Final Average Year's Maximum Pensionable
    Earnings; plus 1.75% of a person's highest average pensionable earnings in
    excess of the Final Average Year's Maximum Pensionable Earnings; multiplied
    by the total number of years credited in the Registered Pension Plan
    ("Credited Pensionable Service"). Pensionable earnings include base salary
    and actual incentive compensation payments to a targeted percentage for all
    employees. Highest average pensionable earnings are defined as the average
    annual pensionable earnings during the 36 consecutive months when earnings
    were highest in the last 15 years prior to termination of employment. Final
    Average Year's Maximum Pensionable Earnings are defined as the three-year
    average of the Year's Maximum Pensionable Earnings as determined in
    accordance with the CANADA PENSION PLAN ACT.

    Registered defined benefit pension plans are subject to a maximum annual
    benefit accrual provided for by the INCOME TAX ACT (Canada), currently
    $1,833 for each year of Credited Pensionable Service, with the result that
    benefits cannot be earned in the Registered Pension Plan on compensation
    above approximately $116,000 per annum.

    Under the Executive Supplemental Pension Plan, Named Executive Officers of
    TransCanada, among others, are entitled to supplementary pension benefits.
    Under this plan, the annual pension benefit is equal to the amount
    calculated using a formula of 1.75% multiplied by the officer's Credited
    Pensionable Service under the plan multiplied by the amount by which such
    officer's highest average annual pensionable earnings exceeds such officer's
    highest average annual Registered Pension Plan earnings.

    Under the Defined Benefit Plan and the Executive Supplemental Pension Plan,
    a Named Executive Officer will receive the following normal form of pension:

    (a) in respect of credited service prior to January 1, 1990, upon
       retirement, a monthly pension payable for life with 60% continuing
       thereafter to the participant's designated joint annuitant; and

    (b) in respect of credited service on and after January 1, 1990, upon
       retirement, a monthly pension as described in (a) above and for unmarried
       participants or married participants who have received spousal consent
       and who have so elected, a monthly pension payable for life with payments
       to the participant's estate guaranteed for the balance of 10 years if the
       participant dies within 10 years of retirement.

    In lieu of the normal form of pension, optional forms of pension payment may
    be chosen provided that any required waivers are completed.

    The following table sets out for the Named Executive Officers, the estimated
    annual Defined Benefit Plan benefits (based on the "joint and 60% survivor"
    method) payable for credited service under the Registered Pension Plan and
    the Executive Supplemental Pension Plan (excluding amounts payable under the
    Canada Pension Plan) in specified final average pensionable earnings and
    years of Credited Pensionable Service classifications.

                                                     TRANSCANADA CORPORATION  17
<Page>

<Table>
<Caption>
    -------------------------------------------------------------------------------------------------------------------
                                                       YEARS OF CREDITED PENSIONABLE SERVICE(1)
        FINAL AVERAGE           ---------------------------------------------------------------------------------------
    PENSIONABLE EARNINGS           10             15             20             25              30               35
                                                                                           
    -------------------------------------------------------------------------------------------------------------------
          $ 400,000             $ 68,000       $102,000       $136,000       $170,000       $  204,000       $  238,000
    -------------------------------------------------------------------------------------------------------------------
            600,000              103,000        155,000        206,000        258,000          309,000          361,000
    -------------------------------------------------------------------------------------------------------------------
            800,000              138,000        207,000        276,000        345,000          414,000          483,000
    -------------------------------------------------------------------------------------------------------------------
          1,000,000              173,000        260,000        346,000        433,000          519,000          606,000
    -------------------------------------------------------------------------------------------------------------------
          1,200,000              208,000        312,000        416,000        520,000          624,000          728,000
    -------------------------------------------------------------------------------------------------------------------
          1,400,000              243,000        365,000        486,000        608,000          729,000          851,000
    -------------------------------------------------------------------------------------------------------------------
          1,600,000              278,000        417,000        556,000        695,000          834,000          973,000
    -------------------------------------------------------------------------------------------------------------------
          1,800,000              313,000        470,000        626,000        783,000          939,000        1,096,000
    -------------------------------------------------------------------------------------------------------------------
          2,000,000              348,000        522,000        696,000        870,000        1,044,000        1,218,000
    -------------------------------------------------------------------------------------------------------------------
</Table>

    NOTE:

     (1)  ASSUMING THAT THE NAMED EXECUTIVE OFFICERS ABOVE REMAIN EMPLOYED BY
        TRANSCANADA UNTIL AGE 60 AND THAT THE REGISTERED PENSION PLAN AND THE
        EXECUTIVE SUPPLEMENTAL PENSION PLAN REMAIN IN FORCE SUBSTANTIALLY IN
        THEIR PRESENT FORMS, SUCH OFFICERS WILL HAVE APPROXIMATELY THE FOLLOWING
        LISTED NUMBER OF YEARS OF CREDITED PENSIONABLE SERVICE: H.N.
        KVISLE -- 23 YEARS, R.K. GIRLING -- 24 YEARS; R.J. TURNER -- 31 YEARS,
        A.J. POURBAIX -- 26 YEARS AND DENNIS J. MCCONAGHY -- 32 YEARS. SEE
        "EMPLOYMENT CONTRACTS". AMOUNTS ARE ROUNDED TO THE NEAREST ONE THOUSAND
        DOLLARS.

EMPLOYMENT CONTRACTS

    TransCanada has entered into an agreement with Mr. Kvisle to grant
    additional credited pensionable service. Upon his completion of five years
    of continuous service with TransCanada (the "Vesting Period"), he will be
    granted five years of additional credited pensionable service. Effective on
    each of the next five anniversaries of the Vesting Period, Mr. Kvisle will
    be granted one additional year of credited pensionable service. All such
    additional service is not to exceed ten additional years of credited
    pensionable service and is only to be recognized on that portion of his
    pensionable earnings which exceeds his annual Registered Pension Plan
    earnings, to be recognized in the TransCanada Executive Supplemental
    Pension Plan.

COMPOSITION OF THE HUMAN RESOURCES COMMITTEE

    The Human Resources Committee of the Board (the "Committee") is composed of
    five directors, K.L. Hawkins (Chair), W.K. Dobson, D.P. O'Brien,
    W.T. Stephens, and J.D. Thompson, who are neither officers nor former
    officers of TransCanada or any of its subsidiaries. The Committee is charged
    with the mandate described under "Compensation and Other
    Information -- Corporate Governance -- Human Resources Committee". The
    Committee reports to the Board on all material matters considered or
    recommended and approved by it.

REPORT ON EXECUTIVE COMPENSATION

    The Committee reviews overall compensation policies and approves the salary
    and other remuneration to be awarded to executive officers of TransCanada.
    TransCanada has adopted a market based compensation program which is
    designed to be competitive in attracting and retaining employees and to
    appropriately reward accomplishments and results through pay for
    performance. The program is comprised of four components: base salary,
    short-term, mid-term and long-term incentive compensation. The program
    provides for a combination of competitive base salary and performance-based
    incentive programs that focus on business achievements, fulfillment of
    individual objectives and overall job performance. There is a particular
    focus on reinforcing commitment to maximize shareholder value. Business and
    individual performance targets are set annually. If actual performance meets
    objectives, an individual's total direct compensation is designed to be
    comparable to the median of the market. If actual performance exceeds those
    targets, an individual's total direct compensation is designed to be
    competitive with compensation levels in other top performing companies
    within the comparator group.

18  TRANSCANADA CORPORATION
<Page>
    In addition, effective January 1, 2003, senior officers of TransCanada were
    given guidelines to achieve an ownership stake in TransCanada that is
    significant in relation to their base salary. Officers have five years to
    meet these ownership guidelines, which are:

<Table>
                                                                                         
                           President and Chief Executive Officer.........  3 times Base Salary
                           Executive Vice-Presidents.....................  2 times Base Salary
                           Certain Senior Executives.....................  1 times Base Salary
</Table>

    In calculating their ownership in TransCanada, officers are entitled to
    include the value of shares owned, and any units held under the Executive
    Share Unit Plan, described elsewhere in this Proxy Circular. Pursuant to
    TransCanada's stock ownership guidelines, as at December 31, 2003 the CEO
    held a current value of $2,543,073 in eligible shares. This is equivalent to
    3.24 times his 2003 base salary.

    The pay mix as between base salary and performance based incentive programs
    for the Named Executive Officers ranges from 26% to 37% of total direct
    compensation in base pay and 63% to 74% of total direct compensation in
    performance based incentives.

    When determining the level of individual executive compensation, the
    Committee considers market compensation data, which is provided by
    independent compensation consultants. This compensation data comprises
    aggregate compensation market data from other Canadian based companies (head
    office or subsidiary offices) of similar size and scope to TransCanada,
    determined by revenue, assets, market capitalization, number of employees
    and industry. The industry data utilized is derived from and includes oil
    and gas (upstream, downstream, heavy oil), pipeline, transportation and, for
    the power business, electric utilities. This group of companies is referred
    to in this report as the "comparator group".

    For 2003, TransCanada's objectives focused on the diligent and disciplined
    implementation of TransCanada's key strategies for growth and value
    creation. Performance against these strategies delivered strong financial
    results with an increase in earnings compared to 2002 and continued strong
    cash flows. Specifically:

    - Net income from continuing operations per share in 2003 was $1.66 compared
      to $1.56 in 2002;

    - Funds generated from continuing operations in 2003 were approximately
      $1.8 billion; and

    - Total shareholder return was 27% in 2003.

    BASE SALARIES

    Base salaries for the Named Executive Officers are considered against the
    market compensation data for similar roles and levels of responsibility
    within the comparator group. Individual salaries are based on the Named
    Executive Officer's performance contribution to TransCanada, as assessed by
    the President and Chief Executive Officer and the Committee, and approved by
    the Committee.

    SHORT-TERM INCENTIVE COMPENSATION

    Annual incentive compensation is designed to link total cash (base salary
    and short-term incentive awards combined) compensation levels to the
    achievement of business and individual goals. The plan provides for annual
    cash awards based on individual contribution to TransCanada's results,
    measured against objectives that are determined at the beginning of each
    year with an emphasis placed on the individual's performance or contribution
    toward financial objectives.

    If individual threshold performance levels are not reached, no incentive is
    payable; if target performance levels are reached, the notional market
    target award is payable. The plan also provides for incentive payments in
    excess of the notional market target award, at the discretion of the
    President and Chief Executive Officer and in consultation with the
    Committee, if performance in a year is superior or exceptional.

                                                     TRANSCANADA CORPORATION  19
<Page>
    MID-TERM INCENTIVE PROGRAM

      EXECUTIVE SHARE UNIT PLAN

    The Named Executive Officers participate in a mid-term incentive program,
    the Executive Share Unit Plan (the "ESU Plan") implemented on February 24,
    2003. The ESU Plan is an integral part of TransCanada's competitive
    compensation program and is performance driven in that it aligns the
    individual performance of TransCanada's officers, including the Named
    Executive Officers, with the achievement of TransCanada's financial
    objectives and shareholder interests. Under the ESU Plan, the Named
    Executive Officers are eligible for an annual award of a certain number of
    units as determined at the discretion of the Committee. The Committee will
    consider an individual's performance, level of responsibility, number of
    stock options awarded, the market value of TransCanada's ESU and stock
    option awards in comparison to the market data of its competitors, and the
    degree to which each executive's potential and contribution will be key to
    the success of TransCanada in determining the size of the unit award for
    each individual executive officer.

    At the time of an award, each ESU unit represents one common share and,
    during the three year vesting cycle, at the time dividends are declared on
    the common shares each unit accrues an amount equal to such dividends, which
    amount is then reinvested at such time in additional units at a price equal
    to the market value of a common share. At the end of three years, provided
    that the pre-determined corporate performance criteria (as discussed below)
    are met, the units will vest. Upon vesting, the units held will be valued
    based on the current share price (a weighted average closing price on the
    Toronto Stock Exchange ("TSX") during the five trading days immediately
    prior to the valuation date) of the common shares.

    At the time of an award, the Committee will set predetermined corporate
    performance criteria as a target and a threshold. If at the end of the
    three year term the target is achieved or exceeded, 100% of the units held
    will vest and, if only the threshold is achieved, 50% of the units held will
    vest. If the threshold is not achieved, none of the units held will vest. In
    the event that the threshold is exceeded but the target is not achieved, the
    Committee will have the discretion to determine on a PRO RATA basis the
    number of units that vest. Awards are based on the target and threshold and
    are measured with respect to the absolute total shareholder return ("TSR"),
    the relative TSR as compared to other specified comparison companies
    (these include Canadian and U.S. organizations with comparable business
    models and a sample of the Standard & Poor's ("S&P")/TSX 60 index companies)
    and corporate financial performance (earnings per share (EPS) and funds
    generated from continuing operations).

    LONG-TERM INCENTIVE PROGRAM

      STOCK OPTION PLAN

    The Named Executive Officers, as well as other key employees, are eligible
    to participate in the Stock Option Plan. See "Business to be Transacted at
    the Meeting -- Amendments to the Stock Option Plan.

    The Stock Option Plan is a component of the Named Executive Officers' total
    compensation program. The Stock Option Plan is intended to reinforce
    executive officer commitment to the long-term growth and profitability of
    TransCanada and shareholder value. The size of the annual stock option award
    to individual executive officers is determined by considering individual
    performance, level of responsibility, authority and overall importance to
    the current welfare of TransCanada, and the degree to which each executive
    officer's long-term potential and contribution will be key to the long-term
    success of TransCanada. The Committee has flexibility in the determination
    of the size of the award, the vesting date and expiry date for any options
    awarded; and, when making its decisions, takes into account all relevant
    circumstances (including the value of TransCanada's stock option awards in
    comparison with its competitors and the number of units awarded under the
    ESU Plan). In the case of stock options, executive officers benefit only if
    the market value of the stock subject to the option at the time of exercise
    is greater than that at the time of the award.

    The Stock Option Plan is administered by the Committee. The exercise price
    of options is determined by the Committee at the time options are awarded
    and is equal to the higher of the closing price of common shares on the date
    of the award and the weighted average closing price of the common shares on
    the TSX during the five trading days immediately preceding the date of the
    award. Options awarded under the Stock Option Plan up to and including the
    2002 award vest as to 25% on the date of award and then 25% on each

20  TRANSCANADA CORPORATION
<Page>
    anniversary thereafter for a period of three years and will be eligible to
    be exercised until their expiry date, which is generally ten years from the
    date on which they were awarded. Options awarded under the Stock Option Plan
    since 2003 will vest as to 33 1/3% on each anniversary of the date of award
    for a period of three years. Such options will be eligible to be exercised
    until their expiry, which will generally be seven years from the date on
    which they were granted.

    The total number of common shares originally reserved for issuance under the
    1995 Option Plan was 25,000,000. As at December 31, 2003, approximately
    10,355,000 common shares were issuable under outstanding options under the
    Stock Option Plan. As at February 24, 2004, approximately 11,555,000 common
    shares were issuable under outstanding options under the Stock Option Plan.
    Exercise prices for unexercised, issued options range from $10.03 to $26.85,
    with expiry periods ranging from March 4, 2004 to February 25, 2012.

      PERFORMANCE UNIT PLAN

    The Performance Unit Plan was established in 1995, has been amended from
    time to time and is administered by the Committee. The Named Executive
    Officers, as well as other key employees, participate in the plan. In
    July 2002, the Committee amended the plan to provide that no further units
    would be granted under the plan. Accruals on outstanding performance units,
    however, will continue in accordance with the plan until 2012.

    Under the Performance Unit Plan, a unit accrues annually a cash amount which
    is no greater than the dividends paid on a common share for the preceding
    financial year if TransCanada's total shareholder return is equal to or
    greater than that of the peer group index for such financial year. If
    TransCanada's total shareholder return is less than that of the peer group
    index for such year, the Committee may award a lesser amount.

    A performance unit may be redeemed for the dollar value accrued on the unit
    beginning on the third anniversary of the award date, the vesting date, and
    is deemed to be automatically redeemed on the tenth anniversary of the award
    date. However, at the time of exercise the market price of a common share
    plus the amount accrued on the unit must be equal to or greater than the
    market price of a common share on the award date of the unit, and the Stock
    Option awarded on the same date as the unit must have been previously
    exercised provided such exercise was not prior to the unit's vesting date.

    As at December 31, 2003, approximately 7,550,000 units under the Performance
    Unit Plan were outstanding. As at February 24, 2004, approximately 7,519,000
    units under the Performance Unit Plan were outstanding.

    EMPLOYEE STOCK SAVINGS PLAN

    Named Executive Officers participate in the Employee Stock Savings Plan on
    the same basis as all other TransCanada employees. Each employee may direct
    a payroll deduction toward the purchase of common shares. TransCanada
    matches the employee-directed purchase in an amount equal to 25% of the
    employee amount to a maximum additional TransCanada contribution of 1% of
    the employee's base salary. The shares purchased and the dividends paid on
    those shares are allocated to the employee account and vest immediately.

    COMPENSATION OF THE PRESIDENT AND CHIEF EXECUTIVE OFFICER

    Mr. Kvisle's compensation is established with reference to the comparator
    group. The Committee makes recommendations to the Board regarding
    Mr. Kvisle's compensation on the same performance-related basis as for the
    other executive officers including a review of the CEO's success with
    respect to all of his personal objectives. There are no established
    weightings or formulaic calculations used in assessing Mr. Kvisle's
    performance against objectives. The Committee considered weightings but made
    a decision to use discretion instead, but place a higher emphasis on
    financial results such as EPS, earnings before interest, taxes, depreciation
    and amortization (EBITDA) and TEV/EBITDA (total enterprise value divided by
    EBITDA). Mr. Kvisle's compensation is comprised of base salary, incentive
    compensation and participation

                                                     TRANSCANADA CORPORATION  21
<Page>
    in the ESU Plan, Stock Option Plan, Performance Unit Plan, Employee Stock
    Savings Plan, and Registered Pension Plan and Executive Supplemental Pension
    Plan. See "Compensation and Other Information -- Employment Contracts".

    The President and Chief Executive Officer's 2003 personal objectives focused
    on maximizing shareholder value by providing strong corporate leadership in
    the pursuit of growth and value creation through business development
    opportunities in the pipeline and power businesses; optimizing company
    assets through active portfolio management and adhering to operationally
    excellent business practices; and, building management teams at all levels
    of the organization capable of delivering business results in line with
    investors expectations. Advancing TransCanada's position in the overall
    energy value chain by building long-term winning relationships is an ongoing
    priority for Mr. Kvisle. In 2003, his attention was concentrated on eastern
    customers, members of the Canadian Association of Petroleum Producers
    (CAPP), and northern constituencies, and he was appointed as the first
    Canadian chair of the Board of Directors of the Interstate National Gas
    Association of America (INGAA).

    The level of focused and strategic leadership provided by Mr. Kvisle
    resulted in net income, earnings per share, and TSR in excess of objectives,
    positioning TransCanada to capture opportunities that create significant
    value for shareholders in the short term and over the long term.

    The Board is of the view that Mr. Kvisle's contribution to TransCanada's
    achievements in 2003 was superior, resulting in his compensation being in
    excess of the median of the comparator group. In the determination of
    Mr. Kvisle's total direct compensation for 2003, the Board considered the
    achievement of the corporate and personal objectives and goals (both
    financial and non-financial) as well as any significant economic,
    industrial, or market circumstances that influenced the performance of
    TransCanada. In this regard, the Board determined that all financial
    objectives of TransCanada were met with the majority exceeding target.

    Submitted by the Human Resources Committee of the Board:

<Table>
                                  
              K.L. Hawkins (Chair)      W.T. Stephens
              W.K. Dobson               J.D. Thompson
              D.P. O'Brien
</Table>

22  TRANSCANADA CORPORATION
<Page>
PERFORMANCE GRAPH

    The following chart compares the five-year cumulative total shareholder
return on the TransCanada (formerly TCPL) common shares to the S&P/TSX composite
index (assuming reinvestment of dividends and considering a $100 investment on
December 31, 1998 in common shares).

EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC

<Table>
<Caption>
                   TRANSCANADA    TSX
                          
December 31, 1998      $100.00  $100.00
December 31, 1999       $58.90  $131.70
December 31, 2000       $87.20  $141.50
December 31, 2001      $105.60  $123.70
December 31, 2002      $127.30  $108.30
December 31, 2003      $161.70  $137.20
</Table>

<Table>
<Caption>
         ----------------------------------------------------------------------------------------------------------------------
                                                                                                                    COMPOUND
                        DEC 31, 1998   DEC 31, 1999   DEC 31, 2000   DEC 31, 2001   DEC 31, 2002   DEC 31, 2003  ANNUAL GROWTH
                                                                                            
         ----------------------------------------------------------------------------------------------------------------------
         TransCanada        100            58.9           87.2          105.6          127.3          161.7          10.1%
         ----------------------------------------------------------------------------------------------------------------------
         TSX                100           131.7          141.5          123.7          108.3          137.2           6.5%
         ----------------------------------------------------------------------------------------------------------------------
</Table>

CORPORATE GOVERNANCE

    The Board and the members of TransCanada's management are committed to the
    highest standards of corporate governance. TransCanada is subject to a
    variety of corporate governance guidelines and requirements enacted by the
    Toronto Stock Exchange ("TSX"), the Canadian Securities Administrators
    ("CSA"), the New York Stock Exchange ("NYSE"), and by the U.S. Securities
    and Exchange Commission ("SEC") under its rules and those mandated by the
    United States Sarbanes-Oxley Act of 2002 ("SOX"). TransCanada's corporate
    governance practices comply with the TSX Company Manual Corporate Governance
    Guidelines (the "TSX Guidelines"), governance rules of the NYSE applicable
    to foreign issuers and applicable requirements of the CSA and the SEC. As a
    non-U.S. company, TransCanada is not required to comply with most of the
    NYSE corporate governance listing standards; however, except as summarized
    on its website at www.transcanada.com, TransCanada's governance practices
    are in compliance with the NYSE standards. TransCanada is also in
    substantial early compliance with the CSA's Multilateral Instrument 52-110
    pertaining to audit committees that comes into force on March 30, 2004 and
    is applicable in 2005 ("Canadian Audit Committee Rules"), and with proposed
    corporate governance guidelines released for comment by the CSA on
    January 16, 2004 which are expected to be in force in 2005 ("Proposed
    Canadian Governance Guidelines").

    TransCanada's principal objective in directing and managing its business and
    affairs is to enhance shareholder value. TransCanada believes that effective
    corporate governance improves corporate performance and benefits all
    shareholders. TransCanada also believes that director, management and
    employee honesty and integrity are important factors in ensuring good
    corporate governance. To that end, TransCanada has adopted codes of business
    ethics for its directors, its employees and its President and

                                                     TRANSCANADA CORPORATION  23
<Page>
    Chief Executive Officer, Chief Financial Officer and Controller.
    TransCanada's codes of business ethics may be viewed on TransCanada's
    website at www.transcanada.com.

    The "Statement of Corporate Governance Practices of TransCanada as Compared
    to the Current TSX Guidelines for Corporate Governance" is attached to this
    Proxy Circular as Schedule "C". It has been approved by the Governance
    Committee of the Board and by the Board as a whole. Additional information
    on TransCanada's Board of Directors and its committees is set forth below.

    The Board has formally adopted and published a set of Corporate Governance
    Guidelines, which affirm TransCanada's commitment to maintaining a high
    standard of corporate governance. The guidelines address the structure and
    composition of the board and its committees and also provide guidance to
    both the board and management in clarifying their respective
    responsibilities. The Board's strengths include an independent,
    non-executive Chair of the Board, well informed, and experienced directors
    who ensure that standards exist to promote ethical behaviour throughout
    TransCanada, effective board size, director share ownership-requirements and
    annual assessment of board, committee and individual director effectiveness.
    TransCanada's Corporate Governance Guidelines are available on TransCanada's
    website at www.transcanada.com.

    The Board discharges its responsibilities directly and through committees.
    At regularly scheduled meetings, members of the Board and management discuss
    a broad range of issues relevant to TransCanada's strategy and business
    interests and the Board is responsible for the approval of TransCanada's
    Strategic Plan. In addition, the Board receives reports from management on
    TransCanada's operational and financial performance. The Board had eight
    scheduled meetings in 2003. Unscheduled meetings are held from time to time
    as required; there were twelve meetings of the Board in 2003.

    BOARD, COMMITTEE AND INDIVIDUAL DIRECTOR ASSESSMENT

    The Governance Committee reports to the Board annually on the evaluation of
    the performance of the Board, each of its committees, and that of individual
    directors, based on the results of the directors' annual self-assessment
    questionnaire. In addition, formal interviews are undertaken annually by the
    Chair, based on the results of the questionnaire and TransCanada's
    Individual Director Terms of Reference, with each member of the Board and
    with each member of the executive leadership of TransCanada. The performance
    of the Chair is annually evaluated against his terms of reference by the
    Chair of the Governance Committee by means of formal interviews with each of
    the directors.

    INDEPENDENCE OF DIRECTORS

    The Board is comprised of 12 directors, of whom 11 have been determined by
    the Board to be outside, unrelated and independent directors. The Board
    annually determines the unrelated and independent status of each of its
    members based on a written set of criteria developed in accordance with the
    definition of "unrelated director" in the TSX Guidelines and the meaning of
    "independent" in the Canadian Audit Committee Rules and the Proposed
    Canadian Governance Guidelines. The independence criteria also conform with
    the applicable rules of the SEC, the NYSE and those set under SOX. The NYSE
    extended definitions of independence applicable to directors of U.S.
    companies are considered in the case of each director as well. The Board has
    determined that none of the directors who serve on its committees have a
    material relationship with TransCanada that could interfere with their
    ability to act in the best interests of TransCanada.

    DESCRIPTION OF BOARD COMMITTEES AND THEIR MANDATES

    The Board has four standing committees: the Audit Committee; the Governance
    Committee; the Health, Safety and Environment Committee; and the Human
    Resources Committee. The Board does not have an Executive Committee.
    Committees are composed entirely of unrelated and independent directors.

    Charters for each of the committees are in the course of revision to bring
    them in full compliance with the new Canadian and U.S. governance
    requirements as these requirements are finalized and come into force over
    the balance of 2004. The current charters are available on TransCanada's
    website

24  TRANSCANADA CORPORATION
<Page>
    at www.transcanada.com and are published in TransCanada's Annual Information
    Form for the year ended December 31, 2003 ("AIF").

    AUDIT COMMITTEE

    This committee is comprised of five unrelated and independent directors and
    is mandated to assist the Board in monitoring, among other things, the
    integrity of the financial statements of TransCanada, the compliance by
    TransCanada with legal and regulatory requirements, and the independence and
    performance of TransCanada's internal and external auditors. The committee
    is also mandated to review and recommend to the Board approval of
    TransCanada's audited annual and unaudited interim consolidated financial
    statements and related management discussion and analysis, and selected
    corporate disclosure documents including the annual information form, all
    prospectuses, other offering memoranda, and any financial statements
    required by regulatory authorities, before they are released to the public
    or filed with the appropriate regulatory authorities. In addition, the
    committee reviews and recommends to the Board the appointment and
    compensation of the external auditor, oversees the accounting, financial
    reporting, control and audit functions, and recommends funding of the
    Canadian pension plans.

    The committee reviews the audit plans of the internal and external auditors
    and meets with them at the time of each committee meeting, in each case
    independently of management. The committee receives and reviews annually the
    external auditor's formal written statement of independence delineating all
    relationships between itself and TransCanada and its report on
    recommendations to management regarding internal controls and procedures,
    and ensures the rotation of the lead audit partner having primary
    responsibility for the audit as required by law. The committee pre-approves
    all audit services and all permitted non-audit services. The committee
    oversees the operation of an anonymous and confidential toll free telephone
    number for employees, contractors and others to call with respect to
    accounting irregularities and ethical violations, and has set up a procedure
    for the receipt, retention, treatment and regular review of any such
    reported activities. This telephone number is published on TransCanada's
    website at www.transcanada.com, on its intranet for employees and in the
    company's Annual Report to shareholders. In addition, the committee
    discusses with management TransCanada's material financial risk exposures
    and the actions management has taken to monitor and control such exposures,
    reviews the internal control procedures to determine their effectiveness,
    monitors compliance with TransCanada's policies and codes of business
    ethics, and reports on these matters to the Board. The committee reviews and
    approves the investment objectives and choice of investment managers for the
    Canadian pension plans and considers and approves any changes to those plans
    relating to financial matters.

    The committee has authority in its discretion to retain advisors to assist
    it in the discharge of its responsibilities. The committee also reviews its
    charter at least annually and, as required, recommends changes to the
    Governance Committee and to the Board. The committee's performance is
    reviewed annually by the Board. There were six meetings of the committee in
    2003.

    CHAIR:  H.G. Schaefer, F.C.A.
    MEMBERS:  P. Gauthier, K.L. Hawkins, S.B. Jackson, J.R. Paul

    GOVERNANCE COMMITTEE

    This committee is comprised of five unrelated and independent directors and
    is mandated to enhance TransCanada's governance through a continuing
    assessment of TransCanada's approach to corporate governance. The committee
    is also mandated to identify qualified individuals to become board members,
    to recommend to the Board nominees for election as directors at each annual
    meeting of shareholders and to annually recommend to the Board placement of
    directors on committees. The committee annually reviews the independence and
    unrelated status of each director in accordance with written criteria
    described above, in order to provide the Board with guidance for its annual
    determination of director independence associated with the placement of
    committee members.

    The committee reviews the performance of individual directors, the Board as
    a whole and each of the committees, in conjunction with the Chair. As noted
    elsewhere in this Proxy Circular, the committee also monitors the
    relationship between management and the Board, and reviews TransCanada's
    structures to

                                                     TRANSCANADA CORPORATION  25
<Page>
    ensure that the Board is able to function independently of management. The
    committee chair annually reviews the performance of the Chair of the Board.
    The committee is also responsible for an annual review of director
    compensation and for the administration of the DSU Plan, including the
    granting of units under the plan.

    The committee has the authority in its discretion to retain advisors to
    assist it in the discharge of its responsibilities. The committee reviews
    its charter at least annually and, as required, recommends changes to the
    Board. The committee's performance is reviewed annually by the Board. There
    were two meetings of the committee in 2003.

    CHAIR:  W.K. Dobson
    MEMBERS:  D.D. Baldwin, D.P. O'Brien, J.R. Paul, H.G. Schaefer

    HUMAN RESOURCES COMMITTEE

    This committee is comprised of five unrelated and independent directors and
    is mandated to review the company's human resource policies and plans,
    monitor succession planning, and to assess the performance of the President
    and Chief Executive Officer and other senior officers of TransCanada and its
    major subsidiaries against set objectives. The committee approves the salary
    and other remuneration to be awarded to senior executive officers of
    TransCanada and its major subsidiaries. The committee reports to the Board
    with recommendations on the remuneration package for the President and Chief
    Executive Officer. The committee approves executive compensation plans and
    approves any major changes to TransCanada's compensation and benefit plans.
    The committee considers and approves any changes to TransCanada's Canadian
    pension plans relating to benefits aspects of these plans. Further, the
    committee administers or monitors the ESU Plan, the Restricted Share Unit
    Plan, the Stock Option Plan and the Performance Unit Plan.

    The committee has the authority to retain advisors in its discretion to
    assist it in the discharge of its responsibilities. The committee reviews
    its charter at least annually and, as required, recommends changes to the
    Governance Committee and the Board. The committee's performance is reviewed
    annually by the Board. There were four meetings of the committee in 2003.

    CHAIR:  K.L. Hawkins
    MEMBERS:  W.K. Dobson, D.P. O'Brien, W.T. Stephens, J.D. Thompson

    HEALTH, SAFETY AND ENVIRONMENT COMMITTEE

    This committee is comprised of five unrelated and independent directors and
    is mandated to monitor the health, safety and environmental practices and
    procedures of TransCanada and its subsidiaries for compliance with
    applicable legislation, conformity with industry standards and prevention or
    mitigation of losses. The committee also considers whether the
    implementation of TransCanada's policies related to health, safety and
    environmental matters are effective. The committee reviews reports and, when
    appropriate, makes recommendations to the Board on TransCanada's policies
    and procedures related to health, safety and the environment. This committee
    meets separately with officers of TransCanada and its business units who
    have responsibility for these matters and reports to the Board on such
    meetings.

    The committee has the authority to retain advisors in its discretion to
    assist it in the discharge of its responsibilities. The committee reviews
    its charter at least annually and, as required, recommends changes to the
    Governance Committee and the Board. The committee's performance is reviewed
    annually by the Board. There were four meetings of the committee in 2003.

    CHAIR:  D.D. Baldwin
    MEMBERS:  P. Gauthier, S.B. Jackson, W.T. Stephens, J.D. Thompson

    CHAIR'S PARTICIPATION IN COMMITTEES

    Mr. Haskayne, the Chair of the Board, is an unrelated and independent
    director and is a non-voting member of all committees of the Board.

26  TRANSCANADA CORPORATION
<Page>
DIRECTORS' AND OFFICERS' LIABILITY INSURANCE

    TransCanada has purchased, at its expense, Directors' and Officers'
    Liability Insurance with policy limits of U.S. $175 million in the
    aggregate, subject to a deductible in respect of corporate reimbursement of
    U.S. $2.5 million for each loss. Generally, under this insurance,
    TransCanada is reimbursed for payments made under corporate indemnity
    provisions on behalf of its directors and officers, and individual directors
    and officers (or their heirs and legal representatives) are covered for
    losses arising during the performance of their duties for which they are not
    indemnified by TransCanada. Major exclusions from coverage include claims
    arising from illegal acts, those acts which result in illegal personal
    profit, violation of any fiduciary duty under the U.S. EMPLOYEE RETIREMENT
    INCOME SECURITY ACT OF 1974, pollution damage (except for resultant
    shareholder actions) and claims brought by a director or officer against
    another director or officer or by TransCanada against a director or officer
    except for shareholder derivative actions. For the year ended December 31,
    2003, the total annual premium in respect of such insurance was $1,861,692
    which was paid entirely by TransCanada.

    Additionally, directors and officers of TransCanada are party to indemnity
    agreements with TransCanada pursuant to which TransCanada has agreed to
    indemnify such directors and officers from liability arising in connection
    with the performance of their duties. Such indemnity agreements conform with
    the provisions of the CANADIAN BUSINESS CORPORATIONS ACT.

                              DIRECTORS' APPROVAL

    The contents of this Proxy Circular, including the schedules hereto, and the
    sending thereof to shareholders entitled to receive notice of the Meeting,
    to each director, to the auditors of TransCanada and to the appropriate
    governmental agencies, have been approved by the Board of TransCanada.

                                  CERTIFICATE

    The foregoing contains no untrue statement of material fact and does not
    omit to state a material fact that is required to be stated or that is
    necessary to make a statement not misleading in light of the circumstances
    in which it was made.

<Table>
                                      
/s/ Harold N. Kvisle                     /s/ Russell K. Girling

Harold N. Kvisle                         Russell K. Girling
President and Chief Executive Officer    Executive Vice-President, Corporate
                                         Development
                                         and Chief Financial Officer
</Table>

    Dated at Calgary, Alberta
    February 24, 2004

                                                     TRANSCANADA CORPORATION  27
<Page>
                                  SCHEDULE "A"
                            TRANSCANADA CORPORATION
                               STOCK OPTION PLAN
                                   RESOLUTION

    BE IT RESOLVED as an ordinary resolution of TransCanada Corporation (the
"Company") that:

    1.  The number of common shares of TransCanada Corporation reserved for
       issuance pursuant to the exercise of stock options under TransCanada's
       Stock Option Plan is increased by an additional 1,000,000 common shares;

    2.  The Stock Option Plan is confirmed in effect until the close of business
       on the date of the Company's 2007 annual meeting of common shareholders;
       and

    3.  Any officer or director of the Company be and is hereby authorized for
       and on behalf of the Company, under corporate seal or otherwise, to do
       all such things and to execute all such documents or instruments as may
       be necessary or desirable to give effect to this resolution.

                                                    TRANSCANADA CORPORATION  A-1
<Page>
                                  SCHEDULE "B"
                            TRANSCANADA CORPORATION
                            SHAREHOLDER RIGHTS PLAN
                                   RESOLUTION

BE IT RESOLVED as an ordinary resolution of TransCanada Corporation (the
"Company") that:

    1.  The Shareholder Rights Plan of the Company be continued and the
       Shareholder Rights Plan Agreement (the "Rights Agreement") dated as of
       April 24, 2003 and amended and restated as of April 23, 2004 between the
       Company and Computershare Trust Company of Canada, as Rights Agent, be
       and it is hereby ratified, confirmed and approved;

    2.  The making on or prior to April 23, 2004 of any revisions to the Rights
       Agreement as may be required by any stock exchange or by professional
       commentators on shareholder rights plans to conform the Rights Agreement
       to versions of shareholder rights plans prevalent for public reporting
       issuers in Canada, as may be approved by any two of the Chair of the
       Board, the Chief Executive Officer, the Chief Financial Officer, any
       Vice-President or a director, is hereby approved;

    3.  The Rights Agreement, as amended in accordance with paragraph 2, is
       hereby ratified, confirmed and approved; and

    4.  Any officer or director of the Company be and is hereby authorized for
       and on behalf of the Company, under corporate seal or otherwise, to do
       all such things and to execute all such documents or instruments as may
       be necessary or desirable to give effect to this resolution.

                       SUMMARY OF SHAREHOLDER RIGHTS PLAN

    The following summarizes the principal terms of the Shareholder Rights Plan.

OBJECTIVES

    The primary objective of the Shareholder Rights Plan is to provide the board
of directors with sufficient time to explore and develop alternatives for
maximizing shareholder value if a take-over bid is made for TransCanada and to
provide every shareholder with an equal opportunity to participate in such a
bid. The Shareholder Rights Plan encourages a potential acquiror to proceed
either by way of a Permitted Bid (as defined in the Shareholder Rights Plan),
which requires the take-over bid to satisfy certain minimum standards designed
to promote fairness, or with the concurrence of the board.

EFFECTIVE DATE

    The Effective Date of the Shareholder Rights Plan is April 24, 2003.

TERM

    To the close of business on the date of the 2007 annual meeting of
shareholders of TransCanada.

ISSUE OF RIGHTS

    On May 15, 2003, one right (a "TransCanada Right") was issued and attached
to each common share outstanding and attached to each common share subsequently
issued.

TRANSCANADA RIGHTS EXERCISE PRIVILEGE

    The TransCanada Rights will separate from the common shares and will be
exercisable eight trading days (the "Separation Time") after a person has
acquired, or commences a take-over bid to acquire, 20% or more of the shares,
other than by an acquisition pursuant to a take-over bid permitted by the
Shareholder Rights Plan (a "Permitted Bid"). The acquisition by any person (an
"Acquiring Person") of 20% or more of the common shares, other than by way of a
Permitted Bid, is referred to as a "Flip-in Event". Any TransCanada Rights held

                                                    TRANSCANADA CORPORATION  B-1
<Page>
by an Acquiring Person will become void upon the occurrence of a Flip-in Event.
Eight trading days after the occurrence of the Flip-in Event, each TransCanada
Right, (other than those held by the Acquiring Person), will permit the purchase
of $200 worth of common shares for $100.

    The issue of the TransCanada Rights is not initially dilutive. Upon a
Flip-in Event occurring and the TransCanada Rights separating from the common
shares, reported earnings per share on a fully diluted or non-diluted basis may
be affected. Holders of TransCanada Rights not exercising their TransCanada
Rights upon the occurrence of a Flip-in Event may suffer substantial dilution.

LOCK-UP AGREEMENT

    A bidder may enter into lock-up agreements with TransCanada's shareholders
("Locked-up Persons") whereby such shareholders agree to tender their common
shares to the take-over bid (the "Subject Bid") without a Flip-in Event (as
referred to above) occurring. Any such agreement must contain a provision that
either permits the Locked-up Person to withdraw the common shares to tender to
another take-over or to support another transaction that will provide greater
value to the shareholder than the Subject Bid or permits the Locked-up Person to
withdraw the common shares to tender to another take-over bid or to support
another transaction that contains an offering price that exceeds the offering
price contained in the Subject Bid by a specified minimum amount not exceeding
7% of the offering price of the Subject Bid. For greater certainty, a Lock-up
Agreement may contain a right of first refusal or require a period of delay (or
other similar limitation) to give a bidder an opportunity to match a higher
price in another transaction as long as the shareholder can accept another bid
or tender to another transaction.

    As restated, the Shareholder Rights Plan requires that any Lock-up Agreement
be made available to TransCanada and the public and amends the definition of
Lock-up Agreement to also provide that under a Lock-up Agreement no "break up"
fees, "top up" fees, penalties, expenses reimbursement or other amounts that
exceed in aggregate the greater of: (i) 2 1/2% of the value payable under the
Subject Bid; and (ii) 50% of the amount by which the value received by a
Locked-up Person under another take-over bid or transaction exceeds what such
Locked-up Person would have received under the Subject Bid; can be payable by
such Locked-up Person if the Locked-up Person fails to deposit or tender common
shares to the Subject Bid or withdraws common shares previously tendered thereto
in order to deposit such common shares to another takeover bid or support
another transaction.

CERTIFICATES AND TRANSFERABILITY

    Prior to the Separation Time, the TransCanada Rights are evidenced by a
legend imprinted on certificates for the common shares issued from and after the
Effective Date and are not to be transferable separately from the common shares.
From and after the Separation Time, the TransCanada Rights will be evidenced by
TransCanada Rights certificates which will be transferable and traded separately
from the common shares.

PERMITTED BID REQUIREMENTS

    The requirements for a Permitted Bid include the following:

    (i) the take-over bid must be made by way of a take-over bid circular;

    (ii) the take-over bid must be made to all shareholders;

   (iii) the take-over bid must be outstanding for a minimum period of 60 days
         and common shares tendered pursuant to the take-over bid may not be
         taken up prior to the expiry of the 60 day period and only if at such
         time more than 50% of the common shares held by shareholders, other
         than the bidder, its affiliates and persons acting jointly or in
         concert and certain other persons (collectively, the "Independent
         Shareholders"), have been tendered to the take-over bid and not
         withdrawn; and

    (iv) if more than 50% of the common shares held by Independent Shareholders
         are tendered to the take-over bid within the 60 day period, the bidder
         must make a public announcement of that fact and the take-over bid must
         remain open for deposits of common shares for an additional 10 business
         days from the date of such public announcement.

B-2  TRANSCANADA CORPORATION
<Page>
    The Shareholder Rights Plan allows for a competing Permitted Bid (a
"Competing Permitted Bid") to be made while a Permitted Bid is in existence. A
Competing Permitted Bid must satisfy all the requirements of a Permitted Bid
except that it may expire on the same date as the Permitted Bid, subject to the
requirement that it be outstanding for a minimum period of 35 days. Prior to
restating the Shareholder Rights Plan, this time period was 21 days; the change
to 35 days conforms the time period to recent changes in securities legislation.

WAIVER

    The board of directors, acting in good faith, may, prior to the occurrence
of a Flip-in Event, waive the application of the Shareholder Rights Plan to a
particular Flip-in Event (an "Exempt Acquisition") where the take-over bid is
made by a take-over bid circular to all holders of common shares. Where the
board exercises the waiver power for one take-over bid, the waiver will also
apply to any other take-over bid for TransCanada made by a take-over bid
circular to all holders of common shares prior to the expiry of any other bid
for which the Shareholder Rights Plan has been waived.

REDEMPTION

    The board of directors with the approval of a majority vote of the votes
cast by shareholders (or the holders of TransCanada Rights if the Separation
Time has occurred) voting in person and by proxy, at a meeting duly called for
that purpose, may redeem the TransCanada Rights at $0.001 per TransCanada Right.
TransCanada Rights shall also be redeemed by the board without such approval
following completion of a Permitted Bid, Competing Permitted Bid or Exempt
Acquisition.

AMENDMENT

    The board of directors may amend the Shareholder Rights Plan with the
approval of a majority vote of the votes cast by shareholders (or the holders of
TransCanada Rights if the Separation Time has occurred) voting in person and by
proxy at a meeting duly called for that purpose. The directors without such
approval may correct clerical or typographical errors and, subject to approval
as noted above at the next meeting of the shareholders (or holders of
TransCanada Rights, as the case may be), may make amendments to the Shareholder
Rights Plan to maintain its validity due to changes in applicable legislation.

BOARD OF DIRECTORS

    The Shareholder Rights Plan will not detract from or lessen the duty of the
board to act honestly and in good faith with a view to the best interests of
TransCanada. The board, when a Permitted Bid is made, will continue to have the
duty and power to take such actions and make such recommendations to
shareholders as are considered appropriate.

EXEMPTIONS FOR INVESTMENT ADVISORS

    Investment advisors, trust companies (acting in their capacities as trustees
and administrators), statutory bodies whose business includes the management of
funds and administrators of registered pension plans acquiring greater than 20%
of the common shares are exempted from triggering a Flip-in Event, provided that
they are not making, or are not part of a group making, a takeover bid.

                                                    TRANSCANADA CORPORATION  B-3
<Page>
                                  SCHEDULE "C"
           STATEMENT OF CORPORATE GOVERNANCE PRACTICES OF TRANSCANADA
                   AS COMPARED TO THE CURRENT TSX GUIDELINES
                            FOR CORPORATE GOVERNANCE

<Table>
                         
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 1                 BOARD OF DIRECTORS SHOULD EXPLICITLY ASSUME RESPONSIBILITY FOR STEWARDSHIP OF THE
                            CORPORATION

Does TransCanada Align?     YES

Description of Approach     THE BOARD HAS RESPONSIBILITY FOR THE OVERALL STEWARDSHIP OF TRANSCANADA,
                            ESTABLISHING THE POLICIES AND STANDARDS OF TRANSCANADA IN THE OPERATION OF ITS
                            BUSINESSES AND REVIEWING AND APPROVING ITS STRATEGIC PLANS. THE BOARD HAS ADOPTED A
                            PUBLISHED SET OF CORPORATE GOVERNANCE GUIDELINES THAT ADDRESS THE STRUCTURE AND
                            COMPOSITION OF THE BOARD AND ITS COMMITTEES AND PROVIDES GUIDANCE TO BOTH THE BOARD
                            AND MANAGEMENT IN CLARIFYING THEIR RESPECTIVE RESPONSIBILITIES AND ENSURING
                            EFFECTIVE COMMUNICATION BETWEEN THE BOARD AND MANAGEMENT. TRANSCANADA'S CORPORATE
                            GOVERNANCE GUIDELINES ARE PUBLISHED ON THE COMPANY'S WEBSITE AT www.transcanada.com.

                            IN ADDITION, THE BOARD HAS COMMITTED ITSELF TO MAINTAINING A HIGH STANDARD OF
                            CORPORATE GOVERNANCE AND INTEGRITY; IT HAS ADOPTED A CODE OF BUSINESS ETHICS FOR
                            DIRECTORS WHICH INCORPORATES AS ITS BASIS, PRINCIPLES OF GOOD CONDUCT AND HIGH
                            ETHICAL BEHAVIOR. TRANSCANADA HAS ALSO ADOPTED CODES OF BUSINESS ETHICS FOR ITS
                            EMPLOYEES AND ONE APPLICABLE TO ITS PRESIDENT AND CHIEF EXECUTIVE OFFICER, CHIEF
                            FINANCIAL OFFICER AND CONTROLLER. THE CODES ARE PUBLISHED ON TRANSCANADA'S WEBSITE
                            AT www.transcanada.com.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 1 a               BOARD OF DIRECTORS SHOULD SPECIFICALLY ASSUME RESPONSIBILITY FOR THE ADOPTION OF A
                            STRATEGIC PLANNING PROCESS

Does TransCanada Align?     YES

Description of Approach     THE BOARD BELIEVES THAT MANAGEMENT IS PRIMARILY RESPONSIBLE FOR THE DEVELOPMENT OF
                            TRANSCANADA'S STRATEGIC PLAN. THE BOARD REVIEWS, QUESTIONS, VALIDATES AND APPROVES
                            TRANSCANADA'S STRATEGIC PLAN ON AN ANNUAL BASIS AND APPROVES ALL MATERIAL CHANGES.
                            THE BOARD BELIEVES THAT STRATEGY DEVELOPMENT IS AN INTERACTIVE PROCESS BETWEEN
                            MANAGEMENT AND THE BOARD AND AS SUCH, THE BOARD MEETS ANNUALLY WITH MANAGEMENT FOR A
                            COMPREHENSIVE STRATEGIC PLANNING SESSION. THE BOARD ALSO RECOGNIZES THAT STRATEGIC
                            PLANNING IS A CONTINUOUS PROCESS AND CONSEQUENTLY MEETS FROM TIME TO TIME DURING THE
                            YEAR AS PLANS EVOLVE WHICH REQUIRE ITS CONSIDERATION OR APPROVAL.

                            IN ADDITION, THE BOARD HOLDS STRATEGIC ISSUES INFORMATION SESSIONS IN CONJUNCTION
                            WITH SCHEDULED BOARD MEETINGS TO DEVELOP A DEEPER UNDERSTANDING OF MATTERS STRATEGIC
                            TO TRANSCANADA. FOUR SUCH MEETINGS WERE HELD IN 2003 AND FOUR ARE SCHEDULED FOR
                            2004.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 1 b               BOARD OF DIRECTORS SHOULD SPECIFICALLY ASSUME RESPONSIBILITY FOR THE IDENTIFICATION
                            OF PRINCIPAL BUSINESS RISKS, AND IMPLEMENTATION OF RISK MANAGEMENT SYSTEMS

Does TransCanada Align?     YES

Description of Approach     THE BOARD IS RESPONSIBLE FOR UNDERSTANDING AND OVERSEEING COMPLIANCE WITH PROCESSES
                            THAT ARE IN PLACE TO MITIGATE THE PRINCIPAL RISKS ASSOCIATED WITH TRANSCANADA'S
                            BUSINESS ON AN ONGOING BASIS, AND IT IS THE RESPONSIBILITY OF MANAGEMENT TO ENSURE
                            THAT THE BOARD AND ITS COMMITTEES ARE KEPT WELL INFORMED OF THESE CHANGING RISKS ON
                            A TIMELY BASIS. THE PRINCIPAL RISKS OF TRANSCANADA ARE THOSE RELATED TO GAS
                            TRANSMISSION AND POWER GENERATION, OVERALL SUPPLY OF AND DEMAND FOR NATURAL GAS,
                            COMPETITION IN THE INDUSTRY SEGMENTS IN WHICH TRANSCANADA PARTICIPATES AND OTHER
                            MARKET AND FINANCIAL RISKS.

                            THE AUDIT COMMITTEE OF THE BOARD REVIEWS TRANSCANADA'S FINANCIAL RISK MANAGEMENT
                            POLICIES AND PROCEDURES AND REPORTS TO THE BOARD ON THESE MATTERS ON A QUARTERLY
                            BASIS. THE BOARD ALSO RECEIVES AND REVIEWS REPORTS FROM THE HEALTH, SAFETY AND
                            ENVIRONMENT COMMITTEE, WHICH INCLUDE RISKS WITHIN THE SCOPE OF ITS MANDATE, ON A
                            QUARTERLY BASIS.
- ----------------------------------------------------------------------------------------------------------------
</Table>

                                                    TRANSCANADA CORPORATION  C-1
<Page>

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<Caption>
- ----------------------------------------------------------------------------------------------------------------
                         
GUIDELINE 1 c               BOARD OF DIRECTORS SHOULD SPECIFICALLY ASSUME RESPONSIBILITY FOR SUCCESSION
                            PLANNING, INCLUDING APPOINTING, TRAINING AND MONITORING SENIOR MANAGEMENT

Does TransCanada Align?     YES

Description of Approach     THE BOARD BELIEVES THAT SUCCESSION PLANNING AND MANAGEMENT DEVELOPMENT ARE KEY TO
                            THE ONGOING PROCESS THAT CONTRIBUTES SUBSTANTIALLY TO THE SUCCESS OF TRANSCANADA. AN
                            ANNUAL REPORT ON SENIOR MANAGEMENT DEVELOPMENT AND SUCCESSION IS PREPARED ANNUALLY
                            FOR PRESENTATION AND DISCUSSION AT THE HUMAN RESOURCES COMMITTEE, WHICH REPORTS ON
                            THE MATTER TO THE BOARD. THE REPORT OUTLINES THE BACKGROUND AND QUALIFICATIONS
                            REQUIRED FOR EACH OF THE SENIOR EXECUTIVE OFFICER POSITIONS IN TRANSCANADA
                            (INCLUDING THAT OF THE CEO) AND FOR KEY OFFICER POSITIONS IN ITS MAJOR SUBSIDIARIES.
                            SEVERAL POTENTIAL INTERNAL SUCCESSORS FOR EACH POSITION ARE IDENTIFIED IN THE REPORT
                            AND THEIR QUALIFICATIONS AND DEVELOPMENT PLANS ARE DISCUSSED IN DETAIL WITH THE
                            COMMITTEE AND THE BOARD. POTENTIAL SUCCESSORS ARE INTRODUCED TO THE BOARD
                            PERIODICALLY.

                            THE HUMAN RESOURCES COMMITTEE ALSO CONDUCTS AN ANNUAL REVIEW AND ASSESSMENT OF THE
                            PERFORMANCE OF THE PRESIDENT AND CHIEF EXECUTIVE OFFICER AND THE SENIOR EXECUTIVE
                            OFFICERS OF TRANSCANADA.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 1 d               BOARD OF DIRECTORS SHOULD SPECIFICALLY ASSUME RESPONSIBILITY FOR COMMUNICATIONS
                            POLICY

Does TransCanada Align?     YES

Description of Approach     THE BOARD HAS PUT PROCESSES IN PLACE TO MONITOR EFFECTIVE, TIMELY AND NON-SELECTIVE
                            COMMUNICATIONS BETWEEN TRANSCANADA, ITS STAKEHOLDERS AND THE PUBLIC. THE BOARD, OR
                            THE APPROPRIATE COMMITTEE, REVIEWS THE CONTENT OF TRANSCANADA'S MAJOR COMMUNICATIONS
                            TO SHAREHOLDERS AND THE INVESTING PUBLIC, INCLUDING THE QUARTERLY AND ANNUAL
                            REPORTS, AND APPROVES THE MANAGEMENT PROXY CIRCULAR, THE ANNUAL INFORMATION FORM AND
                            ANY PROSPECTUSES THAT MAY BE ISSUED. THE INFORMATION IS THEN RELEASED THROUGH
                            MAILINGS TO SHAREHOLDERS, NEWS WIRE SERVICES, THE GENERAL MEDIA AND PUBLISHED ON
                            TRANSCANADA'S WEBSITE AT www.transcanada.com ON ITS HOME PAGE.

                            THE BOARD BELIEVES THAT IT IS THE FUNCTION OF MANAGEMENT TO SPEAK FOR TRANSCANADA IN
                            ITS COMMUNICATIONS WITH THE INVESTMENT COMMUNITY, THE MEDIA, CUSTOMERS, SUPPLIERS,
                            EMPLOYEES, GOVERNMENTS AND THE GENERAL PUBLIC. IT IS UNDERSTOOD THAT THE CHAIR OR
                            OTHER INDIVIDUAL DIRECTORS MAY, FROM TIME TO TIME, BE REQUESTED BY MANAGEMENT TO
                            ASSIST WITH SUCH COMMUNICATIONS. IF COMMUNICATIONS FROM STAKEHOLDERS ARE MADE TO THE
                            CHAIR OR TO OTHER INDIVIDUAL DIRECTORS, MANAGEMENT IS INFORMED AND CONSULTED TO
                            DETERMINE ANY APPROPRIATE RESPONSE.

                            TRANSCANADA HAS AN INVESTOR RELATIONS GROUP THAT RESPONDS TO ANALYST, INSTITUTIONAL
                            AND INDIVIDUAL SHAREHOLDER INQUIRIES AND MAINTAINS A TOLL-FREE TELEPHONE LINE FOR
                            EASE OF CONTACT. INDIVIDUAL QUERIES, COMMENTS OR SUGGESTIONS CAN BE MADE AT ANY TIME
                            BY CALLING OR WRITING DIRECTLY TO TRANSCANADA'S HEAD OFFICE IN CALGARY, ALBERTA. IN
                            ADDITION, TRANSCANADA HAS A COMMUNICATIONS GROUP TO RESPOND TO INQUIRIES FROM MEDIA,
                            GOVERNMENT AND THE PUBLIC. TOGETHER, THESE GROUPS DEAL WITH STAKEHOLDER CONCERNS AND
                            ENSURE THAT ALL INQUIRIES RECEIVE A FULL AND TIMELY RESPONSE.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 1 e               BOARD OF DIRECTORS SHOULD SPECIFICALLY ASSUME RESPONSIBILITY FOR THE INTEGRITY OF
                            INTERNAL CONTROL AND MANAGEMENT INFORMATION SYSTEMS

Does TransCanada Align?     YES

Description of Approach     THE AUDIT COMMITTEE REQUIRES MANAGEMENT TO IMPLEMENT AND MAINTAIN APPROPRIATE
                            SYSTEMS OF INTERNAL CONTROLS AND MEETS WITH TRANSCANADA'S DIRECTOR OF INTERNAL
                            AUDIT, IN EXECUTIVE SESSIONS AND WITH MANAGEMENT, ON AT LEAST A QUARTERLY BASIS TO
                            OVERSEE THE EFFECTIVENESS OF THESE SYSTEMS. IN ADDITION, TRANSCANADA'S PRESIDENT AND
                            CHIEF EXECUTIVE OFFICER AND EXECUTIVE VICE-PRESIDENT, CORPORATE DEVELOPMENT AND
                            CHIEF FINANCIAL OFFICER PROVIDE CERTIFICATES RELATING TO THE CONTENTS OF
                            TRANSCANADA'S QUARTERLY AND ANNUAL REPORTS, WHICH ARE FILED WITH SECURITIES
                            REGULATORY AUTHORITIES, STATING THAT THEY HAVE EVALUATED AND REPORTED ON THE
                            EFFECTIVENESS OF TRANSCANADA'S INTERNAL AND DISCLOSURE CONTROL PROCEDURES.
- ----------------------------------------------------------------------------------------------------------------
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C-2  TRANSCANADA CORPORATION
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<Caption>
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GUIDELINE 2                 MAJORITY OF DIRECTORS SHOULD BE "UNRELATED" (INDEPENDENT FROM MANAGEMENT AND FREE
                            FROM CONFLICTS OF INTEREST)

Does TransCanada Align?     YES

Description of Approach     THE GOVERNANCE COMMITTEE REVIEWS AT LEAST ANNUALLY THE EXISTENCE OF ANY
                            RELATIONSHIPS BETWEEN EACH DIRECTOR AND TRANSCANADA TO ENSURE THAT THE MAJORITY OF
                            DIRECTORS ARE UNRELATED TO AND INDEPENDENT OF TRANSCANADA.

                            THE BOARD BELIEVES THAT, AS A MATTER OF POLICY, THERE SHOULD BE A MAJORITY OF
                            OUTSIDE, UNRELATED AND INDEPENDENT DIRECTORS ON TRANSCANADA'S BOARD. THE BOARD IS
                            CHARGED WITH MAKING THIS DETERMINATION. THE DETERMINATION IS MADE ANNUALLY IN
                            ACCORDANCE WITH THE DEFINITION OF "UNRELATED DIRECTOR" IN THE TSX GUIDELINES AND THE
                            "MEANING OF INDEPENDENCE" IN THE CANADIAN AUDIT COMMITTEE RULES AND THE PROPOSED
                            CANADIAN GOVERNANCE GUIDELINES. THE INDEPENDENCE CRITERIA ALSO CONFORM WITH THE
                            APPLICABLE RULES OF THE SEC, THE NYSE AND THOSE SET OUT IN SOX. THE NYSE'S EXTENDED
                            DEFINITIONS OF INDEPENDENCE THAT APPLY TO DIRECTORS OF U.S. COMPANIES ARE CONSIDERED
                            IN THE CASE OF EACH DIRECTOR AS WELL.

                            IF THE PROPOSED DIRECTORS ARE ELECTED TO THE BOARD, ONLY HAROLD N. KVISLE, THE
                            PRESIDENT AND CHIEF EXECUTIVE OFFICER OF TRANSCANADA, IS A RELATED, NON-INDEPENDENT
                            DIRECTOR. THE BOARD HAS DETERMINED THAT THE REMAINING 11 PROPOSED NOMINEES FOR
                            ELECTION TO THE BOARD AT THE 2004 ANNUAL MEETING HAVE NO MATERIAL RELATIONSHIP WITH
                            TRANSCANADA AND ARE THEREFORE UNRELATED AND INDEPENDENT.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 3                 DISCLOSE FOR EACH DIRECTOR WHETHER HE OR SHE IS UNRELATED, AND HOW THAT CONCLUSION
                            WAS REACHED

Does TransCanada Align?     YES

Description of Approach     HAROLD N. KVISLE, PRESIDENT AND CHIEF EXECUTIVE OFFICER OF TRANSCANADA, IS NOT AN
                            UNRELATED AND INDEPENDENT DIRECTOR.

                            THE BOARD HAS DETERMINED THAT THE REMAINDER OF THE PROPOSED DIRECTORS ARE
                            NON-MANAGEMENT, UNRELATED AND INDEPENDENT DIRECTORS. THIS DETERMINATION WAS MADE
                            BASED ON THE CRITERIA REFERRED TO ABOVE, WITH THE RESULT THAT THE BOARD HAS
                            DETERMINED THAT THE FOLLOWING DIRECTORS HAVE NO INTEREST, BUSINESS OR OTHER
                            RELATIONSHIP THAT COULD OR COULD REASONABLY BE PERCEIVED TO MATERIALLY INTERFERE
                            WITH THEIR ABILITY TO ACT IN THE BEST INTERESTS OF TRANSCANADA. THE BOARD HAS ALSO
                            DETERMINED THAT, WITH THE EXCEPTION OF MR. KVISLE, ALL DIRECTORS PROPOSED FOR
                            ELECTION TO THE BOARD AT THE 2004 ANNUAL MEETING HAVE NO DIRECT OR INDIRECT MATERIAL
                            RELATIONSHIP WITH TRANSCANADA WHICH COULD REASONABLY INTERFERE WITH THEIR EXERCISE
                            OF INDEPENDENT JUDGMENT. ALTHOUGH SOME OF THE PROPOSED NOMINEES ARE ASSOCIATED WITH
                            COMPANIES THAT SHIP NATURAL GAS ON THE TRANSCANADA SYSTEM, TRANSCANADA AS A COMMON
                            CARRIER IN CANADA CANNOT UNDER ITS TARIFF DENY TRANSPORTATION SERVICE TO A
                            CREDIT-WORTHY SHIPPER. IN ADDITION, DUE TO THE SPECIALIZED NATURE OF THE INDUSTRY,
                            TRANSCANADA BELIEVES THAT IT IS IMPORTANT FOR ITS BOARD TO BE COMPOSED OF QUALIFIED
                            AND KNOWLEDGEABLE DIRECTORS. THE BOARD HAS TAKEN THESE FACTORS INTO CONSIDERATION IN
                            MAKING ITS DETERMINATION OF INDEPENDENCE. FURTHER, THE BOARD CONSIDERED WHETHER
                            DIRECTORS SERVING ON BOARDS OF NON-PROFIT ORGANIZATIONS WHICH RECEIVE DONATIONS FROM
                            TRANSCANADA WERE CONFLICTED. THE BOARD DETERMINED THAT SUCH RELATIONSHIPS, WHERE
                            THEY EXISTED, DID NOT INTERFERE WITH ANY SUCH DIRECTOR'S ABILITY TO ACT IN THE BEST
                            INTEREST OF TRANSCANADA, AS ALL DECISIONS ON PROVIDING DONATIONS TO NON-PROFIT
                            ORGANIZATIONS ARE MADE BY A MANAGEMENT COMMITTEE ON WHICH NO DIRECTORS SERVE. THE
                            BOARD ALSO CONSIDERED VARIOUS OTHER CRITERIA, SUCH AS FAMILY RELATIONSHIPS AND
                            PAYMENTS MADE TO TRANSCANADA, IN MAKING ITS DETERMINATION.

                            -- DOUGLAS D. BALDWIN -- UNRELATED AND INDEPENDENT
                            -- WENDY K. DOBSON -- UNRELATED AND INDEPENDENT
                            -- PAULE GAUTHIER -- UNRELATED AND INDEPENDENT
                            -- RICHARD F. HASKAYNE -- UNRELATED AND INDEPENDENT (CHAIR)
                            -- KERRY L. HAWKINS -- UNRELATED AND INDEPENDENT
                            -- S. BARRY JACKSON -- UNRELATED AND INDEPENDENT
                            -- PAUL L. JOSKOW -- UNRELATED AND INDEPENDENT
                            -- DAVID P. O'BRIEN -- UNRELATED AND INDEPENDENT
                            -- JAMES R. PAUL -- UNRELATED AND INDEPENDENT
                            -- HARRY G. SCHAEFER -- UNRELATED AND INDEPENDENT (VICE-CHAIR)
                            -- W. THOMAS STEPHENS -- UNRELATED AND INDEPENDENT
                            -- JOSEPH D. THOMPSON -- UNRELATED AND INDEPENDENT (RETIRING APRIL 23, 2004)
- ----------------------------------------------------------------------------------------------------------------
</Table>

                                                    TRANSCANADA CORPORATION  C-3
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<Caption>
- ----------------------------------------------------------------------------------------------------------------
                         
GUIDELINE 4                 APPOINT A COMMITTEE OF OUTSIDE DIRECTORS RESPONSIBLE FOR APPOINTMENT OF NEW NOMINEES
                            AND ONGOING ASSESSMENT OF DIRECTORS

Does TransCanada Align?     YES

Description of Approach     THE GOVERNANCE COMMITTEE IS RESPONSIBLE FOR PROPOSING NEW NOMINEES TO THE BOARD,
                            WHICH IN TURN IS RESPONSIBLE FOR IDENTIFYING SUITABLE CANDIDATES FOR ELECTION BY THE
                            SHAREHOLDERS. THE GOVERNANCE COMMITTEE ANNUALLY REVIEWS THE GENERAL AND SPECIFIC
                            CRITERIA APPLICABLE TO CANDIDATES TO BE CONSIDERED FOR NOMINATION. THE OBJECTIVE OF
                            THIS REVIEW IS TO MAINTAIN THE COMPOSITION OF THE BOARD IN A WAY THAT PROVIDES THE
                            BEST MIX OF SKILLS AND EXPERIENCE TO GUIDE THE LONG-TERM STRATEGY AND ONGOING
                            BUSINESS OPERATIONS OF TRANSCANADA. NEW NOMINEES MUST HAVE EXPERIENCE IN THE
                            INDUSTRY OR EXPERIENCE IN GENERAL BUSINESS MANAGEMENT OF SIMILAR SIZE AND SCOPE AS
                            TRANSCANADA'S, THE ABILITY TO DEVOTE THE TIME REQUIRED, AND A WILLINGNESS TO SERVE.
                            THE GOVERNANCE COMMITTEE ALSO ADVISES THE BOARD ON THE CRITERIA FOR, AND
                            DETERMINATION OF, THE INDEPENDENCE OF EACH DIRECTOR.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 5                 IMPLEMENT A COMMITTEE PROCESS FOR ASSESSING THE EFFECTIVENESS OF THE BOARD OF
                            DIRECTORS, ITS COMMITTEES AND THE CONTRIBUTION OF INDIVIDUAL DIRECTORS

Does TransCanada Align?     YES

Description of Approach     THE GOVERNANCE COMMITTEE IS RESPONSIBLE FOR MAKING AN ANNUAL ASSESSMENT OF THE
                            OVERALL PERFORMANCE OF THE BOARD, ITS COMMITTEES AND ITS INDIVIDUAL MEMBERS, AND
                            REPORTS ITS FINDINGS TO THE BOARD. AN ANNUAL QUESTIONNAIRE IS UTILIZED AS PART OF
                            THIS PROCESS.

                            THE QUESTIONNAIRE EXAMINES THE EFFECTIVENESS OF THE BOARD AS A WHOLE, AND OF EACH
                            COMMITTEE, AND SPECIFICALLY REVIEWS AREAS THAT THE BOARD AND/OR MANAGEMENT BELIEVE
                            COULD BE IMPROVED TO ENSURE THE CONTINUED EFFECTIVENESS OF THE BOARD AND ITS
                            COMMITTEES IN THE EXECUTION OF THEIR RESPONSIBILITIES.

                            THE ANNUAL QUESTIONNAIRE AND THE DIRECTORS' TERMS OF REFERENCE ARE THEN USED IN THE
                            EVALUATION OF THE CONTRIBUTION OF INDIVIDUAL DIRECTORS. FORMAL INTERVIEWS WITH EACH
                            DIRECTOR AND EACH MEMBER OF TRANSCANADA'S EXECUTIVE LEADERSHIP TEAM ARE ALSO CARRIED
                            OUT BY THE CHAIR ANNUALLY WITH RESPECT TO THIS MATTER. THE CHAIR OF THE GOVERNANCE
                            COMMITTEE ALSO INTERVIEWS EACH DIRECTOR ANNUALLY ON HIS OR HER ASSESSMENT OF THE
                            CHAIR'S PERFORMANCE. ALL OF THESE ASSESSMENTS ARE REPORTED ANNUALLY TO THE FULL
                            BOARD.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 6                 PROVIDE ORIENTATION AND EDUCATION PROGRAMS FOR NEW RECRUITS TO THE BOARD OF
                            DIRECTORS

Does TransCanada Align?     YES

Description of Approach     NEW DIRECTORS ARE PROVIDED WITH AN ORIENTATION AND EDUCATION PROGRAM THAT INCLUDES A
                            DIRECTORS' MANUAL CONTAINING INFORMATION ABOUT THE DUTIES AND OBLIGATIONS OF
                            DIRECTORS, THE BUSINESS AND OPERATIONS OF TRANSCANADA AND DOCUMENTS FROM RECENT
                            BOARD MEETINGS. NEW DIRECTORS ARE GIVEN OPPORTUNITIES FOR MEETINGS AND DISCUSSION
                            WITH SENIOR MANAGEMENT AND OTHER DIRECTORS. THE DIRECTORS' MANUAL IS REVIEWED
                            ANNUALLY BY THE GOVERNANCE COMMITTEE. DIRECTORS ARE ALSO INVITED TO TOUR CERTAIN OF
                            TRANSCANADA'S FACILITIES ANNUALLY, AND SENIOR MANAGEMENT PRESENTATIONS ARE MADE TO
                            THE BOARD PERIODICALLY ON VARIOUS BUSINESS RELATED TOPICS. THE DETAILS OF THE
                            ORIENTATION OF EACH NEW DIRECTOR ARE TAILORED TO EACH DIRECTOR'S INDIVIDUAL NEEDS
                            AND AREAS OF INTEREST.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 7                 EXAMINE SIZE OF BOARD OF DIRECTORS, WITH A VIEW TO IMPROVING EFFECTIVE
                            DECISION-MAKING AND, IF APPROPRIATE, UNDERTAKE A PROGRAM TO REDUCE THE NUMBER OF
                            DIRECTORS

Does TransCanada Align?     YES

Description of Approach     THE GOVERNANCE COMMITTEE IS MANDATED TO REVIEW THE SIZE, COMPOSITION AND PROFILE OF
                            THE BOARD FROM TIME TO TIME, AND RECOMMENDS CHANGES TO THE BOARD WHEN APPROPRIATE.
                            ALTHOUGH THE MAXIMUM NUMBER OF DIRECTORS PERMITTED BY TRANSCANADA'S ARTICLES IS 20,
                            THE BOARD HAS DETERMINED THAT, AT PRESENT, IT IS IN THE BEST INTERESTS OF
                            TRANSCANADA TO MAINTAIN A SMALLER BOARD, IN THE RANGE OF 12 TO 14. IT IS THE BOARD'S
                            BELIEF THAT THIS RANGE IS CURRENTLY SUFFICIENT TO PROVIDE A DIVERSITY OF EXPERTISE
                            AND OPINIONS AND TO ALLOW EFFECTIVE COMMITTEE ORGANIZATION, YET SMALL ENOUGH FOR
                            EFFICIENT MEETINGS AND DECISION-MAKING.
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C-4  TRANSCANADA CORPORATION
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<Caption>
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GUIDELINE 8                 REVIEW ADEQUACY AND FORM OF COMPENSATION OF DIRECTORS TO ENSURE COMPENSATION
                            REFLECTS RISKS AND RESPONSIBILITIES

Does TransCanada Align?     YES

Description of Approach     THE GOVERNANCE COMMITTEE REVIEWS THE COMPENSATION OF THE DIRECTORS ON AN ANNUAL
                            BASIS, TAKING INTO ACCOUNT SUCH MATTERS AS TIME COMMITMENT, RESPONSIBILITY AND
                            COMPENSATION PROVIDED BY COMPARABLE COMPANIES, AND MAKES A RECOMMENDATION TO THE
                            BOARD FOR APPROVAL ANNUALLY. DIRECTORS MAY RECEIVE THEIR COMPENSATION IN THE FORM OF
                            CASH, DEFERRED SHARE UNITS OR A COMBINATION OF BOTH. DIRECTORS MUST HOLD A MINIMUM
                            OF FIVE TIMES THEIR ANNUAL CASH RETAINER FEE IN COMMON SHARES OR RELATED DEFERRED
                            SHARE UNITS OF TRANSCANADA. DIRECTORS HAVE A MAXIMUM OF FIVE YEARS TO REACH THIS
                            LEVEL OF SHARE OWNERSHIP. THE GOVERNANCE COMMITTEE'S REVIEW OF DIRECTOR COMPENSATION
                            IS BASED ON AN OUTSIDE REPORT ON COMPENSATION PAID IN COMPARABLE COMPANIES.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 9                 COMMITTEES SHOULD GENERALLY BE COMPOSED OF OUTSIDE DIRECTORS A MAJORITY OF WHOM ARE
                            UNRELATED

Does TransCanada Align?     YES

Description of Approach     THE BOARD BELIEVES THAT, AS A MATTER OF POLICY, THERE SHOULD BE A MAJORITY OF
                            OUTSIDE, UNRELATED AND INDEPENDENT DIRECTORS ON EACH OF THE COMMITTEES. THE AUDIT
                            COMMITTEE, GOVERNANCE COMMITTEE, HUMAN RESOURCES COMMITTEE AND HEALTH, SAFETY AND
                            ENVIRONMENT COMMITTEE ARE COMPOSED ENTIRELY OF OUTSIDE, UNRELATED AND INDEPENDENT
                            DIRECTORS. EACH COMMITTEE IS GOVERNED BY A CHARTER. COPIES OF THESE CHARTERS CAN BE
                            FOUND ON TRANSCANADA'S WEBSITE AT www.transcanada.com AND ARE PUBLISHED IN
                            TRANSCANADA'S AIF.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 10                APPOINT A COMMITTEE RESPONSIBLE FOR DEVELOPING AN APPROACH TO CORPORATE GOVERNANCE
                            ISSUES

Does TransCanada Align?     YES

Description of Approach     THE MANDATE OF THE GOVERNANCE COMMITTEE INCLUDES RESPONSIBILITY TO UNDERTAKE
                            INITIATIVES THAT ARE NEEDED TO HELP DELIVER PRE-EMINENT CORPORATE GOVERNANCE. THE
                            GOVERNANCE COMMITTEE IS RESPONSIBLE FOR REVIEWING THE OVERALL GOVERNANCE PRINCIPLES
                            OF THE COMPANY AND MONITORING TRANSCANADA'S DISCLOSURE, INCLUDING THIS STATEMENT OF
                            CORPORATE GOVERNANCE PRACTICES. THE GOVERNANCE COMMITTEE ALSO MONITORS BEST
                            PRACTICES AMONG MAJOR NORTH AMERICAN COMPANIES TO ENSURE THAT TRANSCANADA CONTINUES
                            TO CARRY OUT HIGH STANDARDS OF CORPORATE GOVERNANCE.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 11 a              DEFINE LIMITS TO MANAGEMENT'S RESPONSIBILITIES BY DEVELOPING POSITION DESCRIPTIONS
                            FOR:

                            (i) THE BOARD OF DIRECTORS

Does TransCanada Align?     YES

Description of Approach     THE BOARD OPERATES UNDER WRITTEN TERMS OF REFERENCE WHILE RETAINING PLENARY POWER.
                            ANY RESPONSIBILITY NOT DELEGATED TO MANAGEMENT OR A COMMITTEE OF THE BOARD REMAINS
                            WITH THE BOARD. CHARTERS HAVE BEEN ADOPTED FOR EACH OF THE COMMITTEES OUTLINING
                            THEIR PRINCIPAL RESPONSIBILITIES. EACH COMMITTEE REVIEWS ITS CHARTER ANNUALLY TO
                            ENSURE IT IS IN LINE WITH THE CURRENT DEVELOPMENTS IN CORPORATE GOVERNANCE. THE
                            CURRENT CHARTERS ARE AVAILABLE ON TRANSCANADA'S WEBSITE AT www.transcanada.com AND
                            ARE PUBLISHED IN THE AIF.
- ----------------------------------------------------------------------------------------------------------------
</Table>

                                                    TRANSCANADA CORPORATION  C-5
<Page>

<Table>
<Caption>
- ----------------------------------------------------------------------------------------------------------------
                         
                            (ii) THE PRESIDENT AND CHIEF EXECUTIVE OFFICER

Does TransCanada Align?     YES

Description of Approach     THE BOARD HAS APPROVED TERMS OF REFERENCE FOR THE POSITION OF THE PRESIDENT AND
                            CHIEF EXECUTIVE OFFICER, WHICH DEFINES THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S
                            DUTIES AND RESPONSIBILITIES. THESE DUTIES INCLUDE:

                            -- THE DEVELOPMENT AND RECOMMENDATION OF STRATEGIC PLANS TO THE BOARD THAT PROVIDE
                            FOR TRANSCANADA'S PROFITABLE GROWTH AND OVERALL SUCCESS, INCLUDING INVOLVING THE
                            BOARD IN THE EARLY STAGES OF STRATEGY DEVELOPMENT;

                            -- THE IMPLEMENTATION OF BUSINESS AND OPERATIONAL PLANS;

                            -- REPORTING REGULARLY TO THE BOARD ON THE OVERALL PROGRESS AND RESULTS AGAINST
                            OPERATING AND FINANCIAL OBJECTIVES;

                            -- THE AUTHORIZATION OF THE COMMITMENT OF FUNDS TO CAPITAL PROJECTS NOT INCLUDED IN
                            A PREVIOUSLY APPROVED BUDGET OR OTHERWISE BY THE BOARD, TO A MAXIMUM OF
                            $25 MILLION; AND

                            -- THE COMMITMENT OF CORPORATE RESOURCES AND ENTRANCE INTO AGREEMENTS IN THE
                            ORDINARY COURSE OF BUSINESS IN ORDER TO PURSUE THE APPROVED STRATEGIES OF
                            TRANSCANADA, WITH THE PROVISO THAT MAJOR COMMITMENTS, EXPOSURES AND RISKS ARE
                            REPORTED TO THE BOARD ON A REGULAR AND TIMELY BASIS.

                            THE HUMAN RESOURCES COMMITTEE AND THE BOARD ANNUALLY REVIEW AND APPROVE THE
                            PRESIDENT AND CHIEF EXECUTIVE OFFICER'S PERSONAL PERFORMANCE OBJECTIVES AND REVIEW
                            WITH HIM HIS PERFORMANCE AGAINST THE PREVIOUS YEAR'S OBJECTIVES.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 11 b              BOARD OF DIRECTORS SHOULD APPROVE OR DEVELOP CORPORATE OBJECTIVES WHICH THE
                            PRESIDENT AND CHIEF EXECUTIVE OFFICER IS RESPONSIBLE FOR MEETING

Does TransCanada Align?     YES

Description of Approach     THE HUMAN RESOURCES COMMITTEE CONDUCTS AN ANNUAL REVIEW OF THE PERFORMANCE OF
                            TRANSCANADA AND THE PRESIDENT AND CHIEF EXECUTIVE OFFICER AS MEASURED AGAINST
                            OBJECTIVES ESTABLISHED IN THE PRIOR YEAR BY THE BOARD, THE HUMAN RESOURCES COMMITTEE
                            AND THE PRESIDENT AND CHIEF EXECUTIVE OFFICER. THE RESULTS OF THIS ANNUAL REVIEW ARE
                            COMMUNICATED TO THE BOARD, WHICH THEN MAKES AN EVALUATION OF THE OVERALL PERFORMANCE
                            OF TRANSCANADA AND THE PRESIDENT AND CHIEF EXECUTIVE OFFICER. THE CHAIR AND THE
                            CHAIR OF THE HUMAN RESOURCES COMMITTEE COMMUNICATE THIS PERFORMANCE EVALUATION TO
                            THE PRESIDENT AND CHIEF EXECUTIVE OFFICER. THE EVALUATION IS USED BY THE HUMAN
                            RESOURCES COMMITTEE IN ITS DELIBERATIONS CONCERNING THE PRESIDENT AND CHIEF
                            EXECUTIVE OFFICER'S ANNUAL COMPENSATION. THE EVALUATION OF TRANSCANADA'S PERFORMANCE
                            AGAINST CORPORATE OBJECTIVES ALSO FORMS PART OF THE DETERMINATION OF THE ENTIRE
                            COMPENSATION OF ALL EMPLOYEES.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 12                ESTABLISH PROCEDURES TO ENABLE THE BOARD OF DIRECTORS TO FUNCTION INDEPENDENTLY OF
                            MANAGEMENT

Does TransCanada Align?     YES

Description of Approach     THE GOVERNANCE COMMITTEE HAS THE RESPONSIBILITY TO ENSURE THAT THE BOARD FUNCTIONS
                            INDEPENDENTLY OF MANAGEMENT. THE GOVERNANCE COMMITTEE'S RESPONSIBILITIES INCLUDE THE
                            REVIEW OF TRANSCANADA'S STRUCTURES AND PROCEDURES TO ENSURE THE BOARD IS ABLE TO
                            FUNCTION INDEPENDENTLY OF MANAGEMENT AND THAT IT DOES SO FUNCTION. IN ADDITION, THE
                            GOVERNANCE COMMITTEE MONITORS THE QUALITY OF THE RELATIONSHIP BETWEEN MANAGEMENT AND
                            THE BOARD AND RECOMMENDS IMPROVEMENTS AS DEEMED NECESSARY OR DESIRABLE.

                            AT THE CONCLUSION OF EACH BOARD MEETING, NON-MANAGEMENT DIRECTORS MEET WITHOUT THE
                            PRESENCE OF MANAGEMENT TO DISCUSS THE ISSUES THAT HAVE ARISEN AT THE MEETING AND
                            OTHER MATTERS OF INTEREST.

                            THE BOARD, AS A MATTER OF POLICY, APPOINTS THE CHAIR AND VICE-CHAIR IN A
                            NON-EXECUTIVE CAPACITY.
- ----------------------------------------------------------------------------------------------------------------
</Table>

C-6  TRANSCANADA CORPORATION
<Page>

<Table>
<Caption>
- ----------------------------------------------------------------------------------------------------------------
                         
GUIDELINE 13                ESTABLISH AN AUDIT COMMITTEE COMPOSED ONLY OF OUTSIDE DIRECTORS WITH SPECIFICALLY
                            DEFINED ROLES AND RESPONSIBILITIES

Does TransCanada Align?     YES

Description of Approach     ALL FIVE MEMBERS OF THE AUDIT COMMITTEE ARE OUTSIDE, UNRELATED AND INDEPENDENT
                            DIRECTORS. ALL MEMBERS OF THE AUDIT COMMITTEE ARE FINANCIALLY LITERATE AS DEFINED
                            UNDER THE CANADIAN AUDIT COMMITTEE RULES AND THE PROPOSED CANADIAN GOVERNANCE
                            GUIDELINES. IN ADDITION, IN ACCORDANCE WITH THE SEC RULES, THE BOARD HAS
                            SPECIFICALLY DETERMINED THAT IT HAS AT LEAST ONE AUDIT COMMITTEE FINANCIAL EXPERT
                            SERVING ON ITS AUDIT COMMITTEE. MR. HARRY G. SCHAEFER HAS BEEN DETERMINED TO BE SUCH
                            AUDIT COMMITTEE FINANCIAL EXPERT AND IS INDEPENDENT, AS THAT TERM IS DEFINED BY THE
                            NYSE'S LISTING STANDARDS APPLICABLE TO TRANSCANADA. THE SEC RULES PROVIDE THAT THE
                            DETERMINATION BY THE BOARD THAT MR. SCHAEFER IS AN "AUDIT COMMITTEE FINANCIAL
                            EXPERT" AS DEFINED UNDER THOSE RULES DOES NOT MAKE MR. SCHAEFER AN "EXPERT" FOR ANY
                            OTHER PURPOSE, NOR DOES IT IMPOSE A HIGHER DEGREE OF INDIVIDUAL RESPONSIBILITY OR
                            OBLIGATION ON MR. SCHAEFER THAN THAT IMPOSED ON ANY OTHER DIRECTOR. RATHER, THE ROLE
                            OF MR. SCHAEFER, LIKE THE ROLE OF ALL AUDIT COMMITTEE MEMBERS, IS TO OVERSEE THE
                            AUDIT PROCESS AND NOT TO CERTIFY OR GUARANTEE THE ACCURACY OR COMPLETENESS OF THE
                            INTERNAL OR EXTERNAL AUDIT OF TRANSCANADA'S FINANCIAL INFORMATION OR PUBLIC
                            DISCLOSURE.

                            THE CHARTER OF THE AUDIT COMMITTEE SPECIFICALLY DEFINES THE COMMITTEE'S ROLES AND
                            RESPONSIBILITIES AND IS SUMMARIZED ELSEWHERE IN THIS PROXY CIRCULAR. THE CURRENT
                            CHARTER IS PUBLISHED ON TRANSCANADA'S WEBSITE AT www.transcanada.com AND IN THE AIF.
- ----------------------------------------------------------------------------------------------------------------
GUIDELINE 14                IMPLEMENT A SYSTEM TO ENABLE INDIVIDUAL DIRECTORS TO ENGAGE OUTSIDE ADVISORS AT THE
                            CORPORATION'S EXPENSE

Does TransCanada Align?     YES

Description of Approach     TRANSCANADA RECOGNIZES THAT INDIVIDUAL DIRECTORS MAY DESIRE THE SERVICES OF AN
                            INDEPENDENT ADVISOR OR EXPERT TO ASSIST IN MATTERS INVOLVING THEIR RESPONSIBILITIES
                            AS BOARD OR COMMITTEE MEMBERS. THE BOARD HAS DETERMINED THAT ANY DIRECTOR WHO WISHES
                            TO ENGAGE AN OUTSIDE ADVISOR AT THE EXPENSE OF TRANSCANADA MAY DO SO IF HE OR SHE
                            FIRST ADVISES THE GOVERNANCE COMMITTEE. AS WELL, EACH COMMITTEE CHARTER SPECIFICALLY
                            AUTHORIZES SUCH COMMITTEE TO ENGAGE OUTSIDE EXPERTS AS IT DEEMS NECESSARY TO CARRY
                            OUT THEIR DUTIES.
- ----------------------------------------------------------------------------------------------------------------
</Table>

                                                    TRANSCANADA CORPORATION  C-7
<Page>
                             ADDITIONAL INFORMATION

Additional information relating to the company is on SEDAR at www.sedar.com.

Anyone wishing to receive a paper copy of this Proxy Circular or any document
referenced herein, may obtain one free of charge by contacting TransCanada's
Corporate Secretary at 450 - 1st Street S.W., Calgary, Alberta, Canada T2P 5H1,
telephone (403) 920-2000.

Financial information is provided in the company's comparative financial
statements and MD&A for its most recently completed financial year. Shareholders
may access the company website to obtain copies of the company's financial
statements and MD&A at www.transcanada.com.