EXHIBIT 4
                                                                       ---------


                             UNDERWRITING AGREEMENT

                                                                   July 11, 2005

Harvest Energy Trust
Harvest Operations Corp.
#2100, 330 - 5th Avenue S.W.
Calgary, Alberta     T2P 0L4


Attention: Mr. Jacob Roorda, President

Dear Sirs:

Re:      Offering of Subscription Receipts and 6.5% Convertible Extendible
         Unsecured Subordinated Debentures of Harvest Energy Trust

1.       Proposed Offering

         National Bank Financial Inc., TD Securities Inc., CIBC World Markets
Inc., Scotia Capital Inc., Canaccord Capital Corporation, GMP Securities Ltd.,
FirstEnergy Capital Corp., Tristone Capital Inc., Haywood Securities Inc. and
Raymond James Ltd. (collectively, the "Underwriters") understand that Harvest
Energy Trust (the "Trust") proposes to issue and sell 6,505,600 Subscription
Receipts (as defined herein) (the "Offered Receipts") and 75,000 Debentures (as
defined herein) (the "Offered Debentures") with a face value of $1,000 principal
amount per Offered Debenture, a coupon of 6.5% per annum, payable semi-annually
in arrears on June 30 and December 31 of each year commencing December 31, 2005.

         Each Subscription Receipt will entitle the holder either:

         (a)      if the closing of the Acquisition (as defined herein) takes
                  place by 5:00 p.m. (Calgary time) on September 30, 2005, to
                  receive one Trust Unit (as defined herein), together with the
                  Special Interest (as defined herein), if applicable, without
                  payment of additional consideration or further action,
                  forthwith upon the closing of the Acquisition; or

         (b)      if the closing of the Acquisition does not take place by 5:00
                  p.m. (Calgary time) on September 30, 2005, the Acquisition is
                  terminated at any earlier time or the Trust has advised the
                  Underwriters or announced to the public that it does not
                  intend to proceed with the Acquisition (in any case, the
                  "Termination Time"), to have the full purchase price of the
                  Subscription Receipts returned, plus the pro rata portion of
                  the interest earned by the Escrow Agent (as defined herein) on
                  such funds, calculated from the Closing Date to and including
                  the Termination Time.

         If the closing of the Acquisition takes place by the Termination Time,
the Offered Debentures shall be convertible into Trust Units (as defined herein)
at a conversion price of $31.00 per Trust Unit at any time prior to the earlier
of the close of business on the date on which the Offered Debentures mature (the
"Maturity Date") and the business day immediately preceding the date\



specified by the Trust for redemption of the Offered Debentures, subject to
adjustment in certain circumstances, and shall otherwise have such attributes as
are described in the Prospectus (as defined herein).

         If closing of the Acquisition does not take place by the Termination
Time, the Maturity Date will be September 30, 2005 (the "Initial Maturity
Date"). Upon the closing of the Acquisition, the Maturity Date will be
automatically extended to December 31, 2010 (the "Final Maturity Date").

         Subject to the terms and conditions hereof, the Underwriters hereby
severally, and not jointly, agree to purchase from the Trust the Offered
Receipts and the Offered Debentures at the Closing Time (as defined herein) in
the respective percentages set forth in paragraph 19 hereof, and the Trust
hereby agrees to issue and sell to the Underwriters at the Closing Time all, but
not less than all, of the Offered Receipts and the Offered Debentures at the
purchase price of $26.90 per Subscription Receipt and $1,000 per Offered
Debenture, for an aggregate purchase price of $250,000,640.

2.       Definitions

         In this agreement:

         (a)      "8% Debentures" means the 8% convertible unsecured
                  subordinated debentures of the Trust;

         (b)      "8% Debenture Indenture Supplement" means the supplement to
                  the 9% Debenture Trust Indenture dated July 30, 2004 governing
                  the terms of the 8% Debentures;

         (c)      "9% Debentures" means the 9% convertible unsecured
                  subordinated debentures of the Trust;

         (d)      "9% Debenture Trust Indenture" means the trust indenture dated
                  January 29, 2004 among the Trust, Harvest and Valiant Trust
                  Company governing the terms and conditions of the 9%
                  Debentures;

         (e)      "ABCA" means the BUSINESS CORPORATIONS ACT (Alberta), R.S.A.
                  2000, c. B-9, as amended, including the regulations
                  promulgated thereunder;

         (f)      "Acquisition" means the acquisition by HBT1 and HBT2 of the
                  New Properties pursuant to the Acquisition Agreement;

         (g)      "Acquisition Agreement" means the partnership interest
                  purchase and sale agreement dated June 24, 2005 between the
                  Vendor, as vendor, and HBT1 and HBT2, as purchasers;

         (h)      "AIF" means the renewal annual information form of the Trust
                  dated March 30, 2005;

         (i)      "Applicable Securities Laws" means all applicable Canadian
                  securities, corporate and other laws, rules, regulations,
                  notices and policies in the Qualifying Provinces;

         (j)      "ASC" means the Alberta Securities Commission;

         (k)      "BRP" means Breeze Resources Partnership, a general
                  partnership formed under the laws of Alberta;

         (l)      "Business Day" means a day which is not Saturday or Sunday or
                  a legal holiday in the City of Calgary, Alberta;

         (m)      "Closing Date" means August 2, 2005 or such other date as the
                  parties hereto may agree, but in any event, not later than
                  August 25, 2005;

         (n)      "Closing Time" means 6:30 a.m. (Calgary time) or such other
                  time, on the Closing Date, as the Underwriters and the Trust
                  may agree;



         (o)      "Debenture Trust Indenture" means, collectively, the 9%
                  Debenture Trust Indenture as supplemented by the 8% Debenture
                  Indenture Supplement and the supplemental indenture thereto to
                  be dated on or before the Closing Date between the Trust and
                  Valiant Trust Company, governing the terms and conditions of
                  the Offered Debentures;

         (p)      "Debentures" means the 6.5% convertible extendible unsecured
                  subordinated debentures of the Trust having the rights and
                  entitlements set forth in this agreement and otherwise as
                  being provided in the supplemental indenture governing the
                  terms and conditions of the Offered Debentures to be dated on
                  or before the Closing Date;

         (q)      "distribution" means "distribution" or "distribution to the
                  public", as the case may be, as defined under the Applicable
                  Securities Laws and "distribute" has a corresponding meaning;

         (r)      "Documents" means, collectively, the documents
                  incorporated by reference in the Prospectuses and any
                  Supplementary Material including, without limitation:
                  (i)   the AIF;
                  (ii)  the Trust Financial Statements;
                  (iii) the Information Circular - Proxy Statement of the Trust
                  dated March 16, 2005 in connection with the annual and special
                  meeting of unitholders of the Trust held on May 4, 2005
                  (excluding those portions thereof which, pursuant to NI
                  44-101, are not required to be incorporated by reference in
                  the Prospectuses);
                  (iv)  the Storm Financial Statements;
                  (v)   the EnCana Financial Statements; and
                  (vi)  the material change reports of the Trust subsequent to
                  December 31, 2004;

         (s)      "Due Diligence Session" means, collectively, the management
                  due diligence session to be held with the Underwriters prior
                  to the filing of the Preliminary Prospectus, together with any
                  updates or bring-down sessions held prior to the Closing Time;

         (t)      "Engineers" means collectively, McDaniel, GLJ and Paddock;

         (u)      "EnCana Financial Statements" means, collectively, (i) the
                  audited schedule of revenues, royalties and expenses of the
                  EnCana Properties for the years ended December 31, 2003 and
                  2002, (ii) the unaudited interim schedule of revenues,
                  royalties and expenses of the EnCana Properties for the six
                  month period ended June 30, 2004, which financial statements
                  are attached to the Exchange Offer Prospectus;

         (v)      "EnCana Properties' auditors" means PricewaterhouseCoopers
                  LLP, chartered accountants, Calgary, Alberta;

         (w)      "EnCana Properties" means the petroleum and natural gas
                  properties and related assets indirectly acquired by HBT1 and
                  HBT2 from a subsidiary of EnCana Corporation on September 2,
                  2004;

         (x)      "Escrow Agent" means Valiant Trust Company in its capacity as
                  escrow agent pursuant to the Subscription Receipt Agreement;

         (y)      "Exchange" means the Toronto Stock Exchange;

         (z)      "Exchange Offer Prospectus" means the short form prospectus of
                  Harvest dated January 10, 2005 in respect of an exchange offer
                  for the then-outstanding 7(7)/8 % senior notes of Harvest due
                  2011, unconditionally guaranteed by the Trust;

         (aa)     "GLJ" means Gilbert Laustsen Jung Associates Ltd., independent
                  petroleum consultants of Calgary, Alberta;

         (bb)     "Harvest" means Harvest Operations Corp., a corporation
                  amalgamated pursuant to



                  the ABCA and a wholly-owned subsidiary of the Trust;

         (cc)     "HBT1" means Harvest Breeze Trust No. 1, a trust established
                  pursuant to the laws of Alberta and which is a wholly-owned
                  subsidiary of HST;

         (dd)     "HBT2" means Harvest Breeze Trust No. 2, a trust established
                  pursuant to the laws of Alberta and which is a wholly-owned
                  subsidiary of the Trust;

         (ee)     "Harvest Exchangeable Shares" means exchangeable shares,
                  series 1 of Harvest;

         (ff)     "HST" means Harvest Sask Energy Trust, a trust established
                  under the laws of the Province of Alberta and a wholly-owned
                  subsidiary of the Trust;

         (gg)     "Material Agreements" means, collectively, the Acquisition
                  Agreement, the Trust Indenture, the Subscription Receipt
                  Agreement, the Debenture Trust Indenture, the Administration
                  Agreement, the Voting Trust Agreement and the NPI Agreements;

         (hh)     "material change", "material fact" and "misrepresentation"
                  shall have the meanings ascribed thereto under the Applicable
                  Securities Laws;

         (ii)     "McDaniel" means McDaniel & Associates Consultants Ltd.,
                  independent oil and natural gas reservoir engineers, Calgary,
                  Alberta;

         (jj)     "MRRS Procedures" means the mutual reliance review system and
                  procedures provided for by National Policy 43-201 of the
                  Canadian Securities Administrators relating to the Mutual
                  Reliance Review System, as amended or replaced;

         (kk)     "New Properties" means the petroleum and natural gas
                  properties and related assets owned by the Vendor that HBT1
                  and HBT2 will own following completing of the Acquisition;

         (ll)     "New Properties' auditors" means Deloitte & Touche LLP,
                  chartered accountants, Calgary, Alberta;

         (mm)     "New Properties Financial Statements" means, collectively, (i)
                  the audited schedule of revenues, royalties and operating
                  expenses for the New Properties for each of the years ended
                  December 31, 2004 and 2003, together with the report of the
                  New Properties' auditors thereon and notes thereto, and (ii)
                  the unaudited interim schedule of revenues, royalties and
                  operating expenses for the New Properties for the three month
                  period ended March 31, 2005, together with the notes thereto;

         (nn)     "NI 44-101" means National Instrument 44-101 of the Canadian
                  Securities Administrators, as amended or replaced;

         (oo)     "Offered Securities" means, collectively, the Offered Receipts
                  and the Offered Debentures;

         (pp)     "Operating Subsidiaries" means, collectively, Harvest, HST,
                  Red Earth Energy Inc.,



                  Red Earth Partnership, BRP, HBT1 and HBT2 and "Operating
                  Subsidiary" means any of the Corporation, HST, Red Earth
                  Energy Inc., Red Earth Partnership, BRP, HBT1 or HBT2;

         (qq)     "Paddock" means Paddock Lindstrom & Associates Ltd.,
                  independent petroleum consultants of Calgary, Alberta;

         (rr)     "Preliminary Prospectus" means the preliminary short form
                  prospectus of the Trust to be dated July 11, 2005 and any
                  amendments thereto, in respect of the distribution of the
                  Offered Securities, including the documents incorporated by
                  reference therein;

         (ss)     "Prospectus" means the (final) short form prospectus of the
                  Trust and any amendments thereto, in respect of the
                  distribution of the Offered Securities, including the
                  documents incorporated by reference therein;

         (tt)     "Prospectuses" means, collectively, the Preliminary Prospectus
                  and the Prospectus;

         (uu)     "Public Record" means all information filed by or on behalf of
                  the Trust and Harvest with the Securities Commissions,
                  including without limitation, the Documents, the Exchange
                  Offer Prospectus, the Prospectuses, any Supplementary Material
                  and any other information filed with any Securities Commission
                  in compliance, or intended compliance, with any Applicable
                  Securities Laws;

         (vv)     "Qualifying Provinces" means each of the provinces of Canada
                  other than Quebec;

         (ww)     "Reserve Report" means the independent engineering evaluation
                  dated January 1, 2005 of the oil and natural gas reserves of
                  the Operating Subsidiaries as at December 31, 2004 conducted
                  by the Engineers on behalf of the Trust;

         (xx)     "Securities Commissions" means the securities commissions or
                  similar regulatory authorities in the Qualifying Provinces;

         (yy)     "Selling Dealer Group" means the dealers and brokers other
                  than the Underwriters who participate in the offer and sale of
                  the Offered Securities pursuant to this agreement;

         (zz)     "Special Interest" means an amount per Subscription Receipt
                  equal to the amount per Trust Unit of any cash distributions
                  on the Trust Units for which record dates have occurred during
                  the period from the Closing Date to and including the date
                  immediately preceding the date the Trust Units are issued
                  pursuant to the Subscription Receipts;

         (aaa)    "Sproule Report" means, the independent engineering
                  evaluations dated March 31, 2005 of the oil and natural gas
                  reserves associated with the New Properties as at March 31,
                  2005 conducted by Sproule on behalf of the Vendor;

         (bbb)    "Storm" means Storm Energy Ltd., a corporation incorporated
                  under the ABCA and amalgamated with Harvest on June 30, 2004
                  pursuant to the Storm Arrangement;



         (ccc)    "Storm Arrangement" means the arrangement under the provisions
                  of Section 193 of the ABCA involving Storm, Storm Exploration
                  Inc., the Trust and Harvest, on the terms and conditions set
                  forth in the Plan of Arrangement pursuant to which,
                  inter-alia, all shares of Storm were transferred to Harvest
                  and Storm became a wholly-owned subsidiary of Harvest;

         (ddd)    "Storm Financial Statements" means, collectively, (i) the
                  audited comparative consolidated financial statements of Storm
                  for the year ended December 31, 2003, together with the report
                  of Storm's auditors thereon and the notes thereto, and (ii)
                  the unaudited interim comparative consolidated financial
                  statements of Storm as at and for the three months ended March
                  31, 2004, together with the notes thereto, which financial
                  statements are attached to the Exchange Offer Prospectus;

         (eee)    "Storm's auditors" means Deloitte & Touche LLP, chartered
                  accountants, Calgary, Alberta;

         (fff)    "Subscription Receipt Agreement" means the agreement to be
                  dated the Closing Date and made between the Trust, the
                  Underwriters and the Escrow Agent governing the terms and
                  conditions of the Subscription Receipts;

         (ggg)    "Subscription Receipts" means the subscription receipts having
                  the rights and entitlements set forth in this agreement and
                  otherwise being as provided in the Subscription Receipt
                  Agreement;

         (hhh)    "subsidiary" has the meaning assigned thereto in the ABCA and,
                  in respect of the Trust includes the Operating Subsidiaries;

         (iii)    "Supplementary Material" means, collectively, any amendment to
                  the Preliminary Prospectus or Prospectus, any amended or
                  supplemented Preliminary Prospectus or Prospectus or any
                  ancillary material, information, evidence, return, report,
                  application, statement or document which may be filed by or on
                  behalf of the Trust under the Applicable Securities Laws;

         (jjj)    "Tax Act" means the Income Tax Act (Canada) and the
                  regulations thereunder;

         (kkk)    "Trust Assets" means, collectively, the Direct Royalties, the
                  NPI, the Subsequent Investments (as defined in the Trust
                  Indenture), the Permitted Investments (as defined in the Trust
                  Indenture) and cash;

         (lll)    "Trust Financial Statements" means, collectively:

                  (i)      the audited comparative consolidated financial
                           statements of the Trust as at and for the years ended
                           December 31, 2004 and 2003, together with the report
                           of the Trust's auditors thereon and the notes thereto
                           and management's discussion and analysis of the
                           financial condition and results of operations of the
                           Trust for the year ended December 31, 2004;

                  (ii)     the unaudited interim comparative consolidated
                           financial statements of the Trust as at and for the
                           three month periods ended March 31, 2005 and 2004,



                           together with the notes thereto and management's
                           discussion and analysis of the financial condition
                           and results of operations of the Trust for the three
                           months ended March 31, 2005;

         (mmm)    "Trust Indenture" means the Amended and Restated Trust
                  Indenture dated January 1, 2004 pursuant to which the Trust
                  has been established, as such indenture may be further amended
                  by supplemental indentures from time to time;

         (nnn)    "Trust Units" means units of the Trust, each unit representing
                  an equal fractional undivided beneficial interest in the
                  Trust;

         (ooo)    "Trust's auditors" means KPMG LLP, chartered accountants,
                  Calgary, Alberta;

         (ppp)    "Trust's counsel" means Burnet, Duckworth & Palmer LLP or such
                  other legal counsel as the Trust, with the consent of the
                  Underwriters, may appoint;

         (qqq)    "Trustee" means Valiant Trust Company and its successors, as
                  trustee of the Trust;

         (rrr)    "U.S. Memorandum" means the U.S. Private Placement Memorandum
                  and any amendments thereto, to be attached to all copies of
                  the Prospectus to be delivered in connection with the offer
                  and sale of the Offered Securities in the United States and
                  referred to in Schedule "A" hereto;

         (sss)    "Underwriters' counsel" means Blake, Cassels & Graydon LLP or
                  such other legal counsel as the Underwriters, with the consent
                  of the Trust may appoint;

         (ttt)    "Unitholders" means the holders from time to time of Trust
                  Units;

         (uuu)    "Vendor" means Nexen Inc. and certain corporations and
                  partnerships controlled by it; and

         (vvv)    "Voting Trust Agreement" means the voting and exchange trust
                  agreement dated June 30, 2004 among the Trust, Harvest
                  Exchangeco Ltd. and Valiant Trust Company, as trustee.

         In addition, unless otherwise defined herein capitalized terms shall
have the meanings ascribed thereto in the Prospectuses.

3.       Underwriting Fee

         In consideration for their services in underwriting the distribution of
and purchasing the Offered Securities, the Trust agrees to pay the Underwriters:

         (a)      at the Closing Time a fee of $0.6725 per Offered Receipt
                  for each Offered Receipt purchased and $40 per Offered
                  Debenture (being an aggregate amount of $7,375,016; and

         (b)      at the time of release of the funds held by the Escrow Agent
                  to the Trust pursuant to the Subscription Receipt Agreement,
                  if applicable, a fee of $0.6725 per Offered Receipt purchased
                  (being an aggregate amount of $4,375,016), payable from the
                  funds



                  held by the Escrow Agent pursuant to the Subscription Receipt
                  Agreement.

         The foregoing fees (collectively, the "Underwriting Fee") may, at the
sole option of the Underwriters, be deducted from the aggregate gross proceeds
of the sale of the Offered Securities and withheld for the account of the
Underwriters. For greater certainty, the services provided by the Underwriters
in connection herewith will not be subject to the Goods and Services Tax
provided for in the EXCISE TAX ACT (Canada) and taxable supplies provided will
be incidental to the exempt financial services provided. However, in the event
that Revenue Canada, Taxation, Customs and Excise determines that Goods and
Services Tax provided for in the EXCISE TAX ACT (Canada) is exigible on the
Underwriting Fee, the Trust agrees to pay the amount of Goods and Services Tax
forthwith upon the request of the Underwriters. The Trust also agrees to pay the
Underwriters' expenses as set forth in paragraph 11 hereof.

4.       Qualification for Sale

         (a)      The Trust represents and warrants to the Underwriters that it
                  is eligible to use the prompt offering qualification system
                  described in NI 44-101 for the distribution of the Offered
                  Securities.

         (b)      The Trust shall:

                  (i)      not later than 5:00 p.m. (Calgary time) on July 11,
                           2005, have prepared and filed the Preliminary
                           Prospectus and other documents required under the
                           Applicable Securities Laws with the Securities
                           Commissions and designated the ASC as the principal
                           regulator; and

                  (ii)     have obtained from the ASC a preliminary MRRS
                           decision document dated not later than July 11, 2005,
                           evidencing that a receipt has been issued for the
                           Preliminary Prospectus in each Qualifying Province;

                  (iii)    forthwith after any comments with respect to the
                           Preliminary Prospectus have been received from the
                           Securities Commissions:

                           (A)      but not later than July 20, 2005 (or such
                                    later date as may be agreed to in writing by
                                    the Trust, Harvest and the Underwriters),
                                    have prepared and filed the Prospectus and
                                    other documents required under the
                                    Applicable Securities Laws with the
                                    Securities Commissions; and

                           (B)      have obtained from the ASC a final MRRS
                                    decision document dated not later than July
                                    20, 2005 (or such later date as may be
                                    agreed to in writing by the Trust, Harvest
                                    and the Underwriters), evidencing that a
                                    receipt has been issued for the Prospectus
                                    in each Qualifying Province, or otherwise
                                    obtained a receipt for the Prospectus from
                                    each of the Securities Commissions;

           and otherwise fulfilled all legal requirements to enable the Offered
           Securities to be offered and sold to the public in each of the
           Qualifying Provinces through the Underwriters or any other investment
           dealer or broker registered in the applicable Qualifying Province;
           and

                  (iv)     until the completion of the distribution of the
                           Offered Securities, promptly take all additional
                           steps and proceedings that from time to time may be
                           required under the Applicable Securities Laws in each
                           Qualifying Province to continue to qualify the
                           Offered Securities for distribution or, in the event
                           that the Offered



                           Securities have, for any reason, ceased to so
                           qualify, to again qualify the Offered Securities for
                           distribution and to ensure the Trust Units issuable
                           pursuant to the Offered Receipts are freely tradeable
                           in the Qualifying Provinces, save and except for a
                           trade that is a control distribution.

         (c)      Prior to the filing of the Prospectuses and, during the period
                  of distribution of the Offered Securities, prior to the filing
                  with any Securities Commissions of any Supplementary Material,
                  the Trust shall have allowed the Underwriters and the
                  Underwriters' counsel to participate fully in the preparation
                  of, and to approve the form of, such documents (including,
                  without limitation the U.S. Memorandum) and to have reviewed
                  any documents incorporated by reference therein.

         (d)      During the period from the date hereof until completion of the
                  distribution of the Offered Securities, the Trust shall allow
                  the Underwriters to conduct all due diligence which they may
                  reasonably require in order to fulfil their obligations as
                  underwriters and in order to enable the Underwriters
                  responsibly to execute the certificates required to be
                  executed by them in the Prospectuses or in any Supplementary
                  Material.

         (e)      The Trust shall take or cause to be taken all such other steps
                  and proceedings, including fulfilling all legal, regulatory
                  and other requirements, as required under Applicable
                  Securities Laws to qualify the Offered Securities for
                  distribution to the public in the Qualifying Provinces, to
                  ensure that Trust Units issuable pursuant to the Offered
                  Receipts are freely tradeable in the Qualifying Provinces,
                  save and except for a trade that is a control distribution,
                  and to qualify the Offered Securities for sale in transactions
                  exempt from registration under the United States SECURITIES
                  ACT OF 1933 (the "U.S. Act") and on a "private placement"
                  basis in the United States and for sale internationally as
                  permitted by applicable laws.

5.       Delivery of Prospectus and Related Documents

         The Trust shall deliver or cause to be delivered without charge to the
Underwriters and the Underwriters' counsel the documents set out below at the
respective times indicated:

         (a)      prior to or contemporaneously, as nearly as practicable, with
                  the filing with the Securities Commissions of each of the
                  Preliminary Prospectus and the Prospectus:

                  (i)          copies of the Preliminary Prospectus and the
                               Prospectus, signed as required by the Applicable
                               Securities Laws;

                  (ii)         copies of the U.S. Memorandum if required by the
                               Underwriters; and

                  (iii)        copies of any documents incorporated by reference
                               therein which have not previously been delivered
                               to the Underwriters;

                  as soon as they are available and in any event, not later than
                  one Business Day following the filing with the Securities
                  Commissions of the Preliminary Prospectus or the Prospectus,
                  as the case may be;



         (b)      as soon as they are available, copies of any Supplementary
                  Material, as required, signed as required by the Applicable
                  Securities Laws and including, in each case, copies of any
                  documents incorporated by reference therein which have not
                  been previously delivered to the Underwriters;

         (c)      prior to the filing of the Prospectus with the Securities
                  Commissions, a "comfort letter" from each of the Trust's
                  auditors, the New Properties' auditors, Storm's auditors and
                  the EnCana Properties' auditors, dated the date of the
                  Prospectus, addressed to the Underwriters and reasonably
                  satisfactory in form and substance to the Underwriters and the
                  Underwriters' counsel, to the effect that they have carried
                  out certain procedures performed for the purposes of comparing
                  certain specified financial information and percentages
                  appearing in the Prospectus and the documents incorporated
                  therein by reference with indicated amounts in the financial
                  statements or accounting records of the Trust, Harvest, the
                  New Properties, Storm and the EnCana Properties, as
                  applicable, and have found such information and percentages to
                  be in agreement, which comfort letter shall be based on the
                  Trust's auditors, the New Properties' auditors, Storm's
                  auditors and the EnCana Properties' auditors review having a
                  cut-off date of not more than two Business Days prior to the
                  date of the Prospectus;


         Opinions and comfort letters similar to the foregoing shall be provided
to the Underwriters with respect to any Supplemental Material and any other
relevant document at the time the same is presented to the Underwriters for
their signature or, if the Underwriters' signature is not required, at the time
the same is filed. All such letters shall be in form and substance acceptable to
the Underwriters and the Underwriters' counsel, acting reasonably.

         Such deliveries shall also constitute the Trust's consent to the use by
the Underwriters and other members of the Selling Dealer Group of the Documents,
the Prospectuses, the U.S. Memorandum and any Supplementary Material in
connection with the offering and sale of the Offered Securities.

6.       Commercial Copies

         (a)      The Trust shall, as soon as possible but in any event not
                  later than noon (local time at the place of delivery) on the
                  Business Day following the date of the filing of the
                  Preliminary Prospectus or the Prospectus, as the case may be,
                  with the Securities Commissions and no later than noon (local
                  time) on the first Business Day after the execution of any
                  Supplementary Material in connection with the Prospectuses
                  cause to be delivered to the Underwriters, without charge,
                  commercial copies of the Preliminary Prospectus, the
                  Prospectus or such Supplementary Material in such numbers and
                  in such cities as the Underwriters may reasonably request by
                  oral or written instructions to the Trust or the printer
                  thereof given no later than the time when the Trust authorizes
                  the printing of the commercial copies of such documents.

         (b)      The Trust shall cause to be provided to the Underwriters such
                  number of copies of any documents incorporated by reference in
                  the Preliminary Prospectus, the Prospectus or



                  any Supplemental Materials as the Underwriters may reasonably
                  request.

7.       Material Change

         (a)      During the period of distribution of the Offered Securities,
                  the Trust and Harvest will promptly inform the Underwriters of
                  the full particulars of:

                  (i)      any material change (actual, anticipated or
                           threatened) in or affecting the business,
                           operations, revenues, capital, properties,
                           assets, liabilities (absolute, accrued,
                           contingent or otherwise), condition (financial or
                           otherwise) or results of operations of the Trust
                           and its subsidiaries, taken as a whole, or
                           affecting the ability of Harvest to manage the
                           Trust or the other Operating Subsidiaries;

                  (ii)     any change in any material fact contained or
                           referred to in the Preliminary Prospectus, the
                           Prospectus or any Supplementary Material; and

                  (iii)    the occurrence of a material fact or event which,
                           in any such case, is, or may be, of such a nature
                           as to:

                           (A)      render the Preliminary Prospectus, the
                                    Prospectus or any Supplementary Material
                                    untrue, false or misleading in any material
                                    respect;
                           (B)      result in a misrepresentation in the
                                    Preliminary Prospectus, the Prospectus or
                                    any Supplementary Material; or
                           (C)      result in the Preliminary Prospectus, the
                                    Prospectus or any Supplementary Material not
                                    complying in any material respect with the
                                    Applicable Securities Laws,

         provided that if the Trust or Harvest is uncertain as to whether a
         material change, change, occurrence or event of the nature referred to
         in this paragraph has occurred, the Trust and Harvest shall promptly
         inform the Underwriters of the full particulars of the occurrence
         giving rise to the uncertainty and shall consult with the Underwriters
         as to whether the occurrence is of such nature.

         (b)      During the period of distribution of the Offered
                  Securities, the Trust and Harvest will promptly inform the
                  Underwriters of the full particulars of:

                  (i)      any request of any Securities Commission for any
                           amendment to the Preliminary Prospectus, the
                           Prospectus or any other part of the Public Record or
                           for any additional information;

                  (ii)     the issuance by any Securities Commission or similar
                           regulatory authority, the Exchange or any other
                           competent authority of any order to cease or suspend
                           trading of any securities of the Trust or Harvest or
                           of the institution or threat of institution of any
                           proceedings for that purpose; and

                  (iii)    the receipt by the Trust or Harvest of any
                           communication from any



                           Securities Commission or similar regulatory
                           authority, the Exchange or any other competent
                           authority relating to the Preliminary Prospectus, the
                           Prospectus, any other part of the Public Record or
                           the distribution of the Offered Securities or the
                           Trust Units issuable pursuant to the Offered Receipts
                           or the Trust Units issuable on the conversion or
                           redemption of the Offered Debentures.

         (c)      The Trust and Harvest will promptly comply to
                  the reasonable satisfaction of the Underwriters and the
                  Underwriters' counsel with Applicable Securities Laws with
                  respect to any material change, change, occurrence or event of
                  the nature referred to in paragraphs 7(a) or 6(b) above and
                  the Trust and Harvest will prepare and file promptly at the
                  Underwriters' request any amendment to the Prospectus or
                  Supplementary Material as may be required under Applicable
                  Securities Laws; provided that the Trust and Harvest shall
                  have allowed the Underwriters and the Underwriters' counsel to
                  participate fully in the preparation of any Supplementary
                  Material, to have reviewed any other documents incorporated by
                  reference therein and conduct all due diligence investigations
                  which the Underwriters may reasonably require in order to
                  fulfill their obligations as underwriters and in order to
                  enable the Underwriters responsibly to execute the certificate
                  required to be executed by them in, or in connection with, any
                  Supplementary Material, such approval not to be unreasonably
                  withheld and to be provided in a timely manner. The Trust
                  shall further promptly deliver to each of the Underwriters and
                  the Underwriters' counsel a copy of each Supplementary
                  Material as filed with the Securities Commissions, and of
                  opinions and letters with respect to each such Supplementary
                  Material substantially similar to those referred to in
                  paragraph 5 above.

         (d)      During the period of distribution of the Offered Securities,
                  the Trust will promptly provide to the Underwriters, for
                  review by the Underwriters and the Underwriters' counsel,
                  prior to filing or issuance:

                  (i)      any publicly released financial statement of the
                           Trust;

                  (ii)     any proposed document, including without limitation
                           any amendment to the AIF, new annual information
                           form, material change report, interim report, or
                           information circular, which may be incorporated, or
                           deemed to be incorporated, by reference in the
                           Prospectus; and

                  (iii)    any press release of the Trust.

8.       Representations and Warranties of the Trust and Harvest

         (a)      Each delivery of the Preliminary Prospectus, the Prospectus
                  and any Supplementary Material pursuant to paragraph 5 above
                  shall constitute a joint and several representation and
                  warranty to the Underwriters by each of the Trust and Harvest
                  (and each of the Trust and Harvest hereby acknowledges that
                  each of the Underwriters is relying on such representations
                  and warranties in entering into this agreement) that:

                  (i)      all of the information and statements (except
                           information and statements furnished by and relating
                           solely to the Underwriters) contained in the



                           Preliminary Prospectus, the Prospectus or any
                           Supplementary Material, as applicable, including,
                           without limitation, the documents incorporated by
                           reference, as the case may be:

                           (A)      are at the respective dates of such
                                    documents, true and correct in all material
                                    respects;

                           (B)      contain no misrepresentation; and

                           (C)      constitute full, true and plain disclosure
                                    of all material facts relating to the Trust
                                    and its subsidiaries (taken as a whole) and
                                    the Offered Securities;

                  (ii)     the Preliminary Prospectus, the Prospectus, or any
                           Supplementary Material, as applicable, including,
                           without limitation, the documents incorporated by
                           reference, as the case may be, complies in all
                           material respects with the Applicable Securities
                           Laws, including without limitation NI 44-101; and

                  (iii)    except as is disclosed in the Public Record, there
                           has been no intervening material change (actual,
                           proposed or prospective, whether financial or
                           otherwise), from the date of the Preliminary
                           Prospectus, the Prospectus and any Supplementary
                           Material to the time of delivery thereof, in the
                           business, operations, revenues, capital, properties,
                           assets, liabilities (absolute, accrued, contingent or
                           otherwise), condition (financial or otherwise) or
                           results of operations, or ownership of the Trust and
                           its subsidiaries, taken as a whole.

         (b)      In addition to the representations and warranties contained in
                  clause 8(a) hereof, each of the Trust and Harvest jointly and
                  severally represents and warrants to the Underwriters, and
                  acknowledges that each of the Underwriters is relying upon
                  such representations and warranties in entering into this
                  agreement that:

                  (i)      the Trust has been properly created and organized and
                           is a valid and subsisting trust under the laws of the
                           Province of Alberta, having Valiant Trust Company as
                           its duly appointed trustee, and has all requisite
                           trust authority and power to carry on its business as
                           described in the Prospectuses including, without
                           limitation, to perform its obligations under the
                           Material Agreements to which it is a party and to own
                           and administer its properties and assets including,
                           without limitation, the Trust Assets;

                  (ii)     each of the Operating Subsidiaries has been duly
                           incorporated or otherwise created, as applicable, and
                           organized and is valid and subsisting in good
                           standing under the laws of its jurisdiction of
                           incorporation or creation, as applicable, and has all
                           requisite corporate or trust authority, as
                           applicable, and power to carry on its business as
                           described in the Prospectuses and to own, lease and
                           operate its properties and assets as described in the
                           Prospectuses including, without limitation, to
                           perform its obligations under the Material Agreements
                           to which it is a party;

                  (iii)    each of the Operating Subsidiaries is qualified to
                           carry on business and is



                           validly subsisting under the laws of each
                           jurisdiction in which it carries on its business and
                           the Trust is qualified to carry on its activities
                           including, without limitation, owning the Trust
                           Assets in each jurisdiction where it carries on such
                           activities;

                  (iv)     except as described in the Prospectuses, neither the
                           Trust nor Harvest has any material subsidiaries and
                           neither the Trust nor Harvest is "affiliated" with or
                           a "holding corporation" of any body corporate (within
                           the meaning of those terms in the ABCA);

                  (v)      the Trust is a "unit trust" and a "mutual fund trust"
                           under the Tax Act and the Trust shall at all times
                           conduct its affairs so as to continue to enable the
                           Trust to qualify as a "unit trust" and a "mutual fund
                           trust", including by limiting its activities to
                           investing the property of the Trust in the Trust
                           Assets and other property in which a "mutual fund
                           trust" is permitted by the Tax Act to invest, and
                           will not carry on any other business;

                  (vi)     to the knowledge of the Trust and Harvest, after
                           reasonable inquiry, non-residents of Canada (as that
                           term is used in the Tax Act) do not beneficially own
                           more than 20% of the issued and outstanding Trust
                           Units;

                  (vii)    all of the issued and outstanding shares and trust
                           units in the capital of each of the Operating
                           Subsidiaries, as applicable, are fully paid and
                           non-assessable and, other than the Harvest
                           Exchangeable Shares and the Red Earth Partnership,
                           legally and beneficially wholly-owned (directly or
                           indirectly) by the Trust free and clear of all
                           mortgages, liens, charges, pledges, security
                           interests, encumbrances, claims or demands whatsoever
                           (other than as provided in the credit facilities of
                           the Trust or Harvest and as described in the Trust
                           Financial Statements) and no person holds any
                           securities convertible into or exchangeable for
                           issued or unissued shares or trust units, as
                           applicable, of any of the Operating Subsidiaries or
                           has any agreement, warrant, option, right or
                           privilege (whether pre-emptive or contractual) being
                           or capable of becoming an agreement warrant, option
                           or right for the acquisition of any unissued or
                           issued securities of any of the Operating
                           Subsidiaries;

                  (viii)   the Trust has full power and authority to issue the
                           Offered Receipts, the Offered Debentures, the Trust
                           Units issuable pursuant to the Offered Receipts and
                           the Trust Units issuable on the conversion or
                           redemption of the Offered Debentures and, at the
                           Closing Date (a) the Offered Receipts, the Offered
                           Debentures and the Trust Units issuable pursuant to
                           the Offered Receipts and the Trust Units issuable
                           upon conversion or redemption of the Offered
                           Debentures will be duly and validly authorized,
                           allotted and reserved for issuance in accordance with
                           the Subscription Receipt Agreement, the Debenture
                           Trust Indenture and the Trust Indenture, as
                           applicable, and, upon receipt of the purchase price
                           therefor, the Offered Receipts and the Offered
                           Debentures will be duly and validly



                           issued as fully paid and nonassessable, and (b) the
                           Trust Units issuable pursuant to the Offered Receipts
                           and the Trust Units issuable on the conversion or
                           redemption of the Offered Debentures will be duly and
                           validly authorized, allotted and reserved for
                           issuance, and upon the issuance of such Trust Units
                           in accordance with the terms of the Subscription
                           Receipt Agreement, the Debenture Trust Indenture and
                           the Trust Indenture, as applicable, such Trust Units
                           will be duly and validly issued as fully paid and
                           nonassessable;

                  (ix)     none of the Trust or any Operating Subsidiary is in
                           default or breach of, and the execution and delivery
                           of, and the performance of and compliance with the
                           terms of this agreement, the Subscription Receipt
                           Agreement or the Debenture Trust Indenture by the
                           Trust and Harvest or any of the transactions
                           contemplated hereby or thereby does not and will not
                           result in any breach of, or constitute a default
                           under, and does not and will not create a state of
                           facts which, after notice or lapse of time or both,
                           would result in a breach of or constitute a default
                           under, (i) the Trust Indenture, (ii) any term or
                           provision of the articles, bylaws or constating
                           documents of the Trust or any Operating Subsidiary,
                           as applicable, (iii) any resolutions of the
                           unitholders or the directors (or any committee
                           thereof) or shareholders of the Trust or any
                           Operating Subsidiary, as applicable, (iv) any
                           indenture, mortgage, note, contract, agreement
                           (written or oral), instrument, lease or other
                           document including, without limitation, any Material
                           Agreement to which the Trust or any Operating
                           Subsidiary is a party or by which any of the Trust or
                           any Operating Subsidiary is bound, or (v) any
                           judgment decree, order, statute, rule or regulation
                           applicable to the Trust or any Operating Subsidiary,
                           which default or breach might reasonably be expected
                           to materially adversely affect the business,
                           operations, capital, properties, assets, liabilities
                           (absolute, accrued, contingent or otherwise),
                           ownership or condition (financial or otherwise) or
                           results of operations of the Trust, Harvest and their
                           subsidiaries (taken as a whole);

                  (x)      each of the Trust and Harvest has full trust or
                           corporate power and authority to enter into this
                           agreement, the Subscription Receipt Agreement and the
                           Debenture Trust Indenture, as the case may be, and to
                           perform its obligations set out herein and therein
                           and this agreement has been and, at the Closing Time,
                           the Subscription Receipt Agreement and the Debenture
                           Trust Indenture will be duly authorized, executed and
                           delivered by the Trust and Harvest, as the case may
                           be, and this agreement is and, at the Closing Time,
                           the Subscription Receipt Agreement and the Debenture
                           Trust Indenture will be a legal, valid and binding
                           obligation of the Trust and Harvest, as the case may
                           be, enforceable against the Trust and Harvest, as the
                           case may be, in accordance with its terms subject to
                           the general qualifications set forth in the opinion
                           of the Trust's counsel to be delivered pursuant to
                           paragraph 13(a)(viii);



                  (xi)     there has not been any material change in the
                           capital, assets, liabilities or obligations
                           (absolute, accrued, contingent or otherwise) of the
                           Trust and the Operating Subsidiaries (taken as a
                           whole) from the position set forth in the Trust
                           Financial Statements except as contemplated by the
                           Prospectuses and the Public Record and there has not
                           been any adverse material change in the business,
                           operations, capital, properties, assets, liabilities
                           (absolute, accrued, contingent or otherwise),
                           condition (financial or otherwise) or results of
                           operations of the Trust, Harvest and their
                           subsidiaries (taken as a whole) since March 31, 2005
                           except as disclosed in the Prospectuses and the
                           Public Record; and since that date there have been no
                           material facts, transactions, events or occurrences
                           which could materially adversely affect the business,
                           operations, capital, properties, assets, liabilities
                           (absolute, accrued, contingent or otherwise),
                           condition (financial or otherwise) or results of
                           operations of the Trust, Harvest and their
                           subsidiaries (taken as a whole) which have not been
                           disclosed in the Prospectuses and the Public Record;

                  (xii)    to the knowledge of the Trust and Harvest, after due
                           enquiry, the EnCana Properties Financial Statements
                           fairly present in all material respects, in
                           accordance with generally accepted accounting
                           principles in Canada, consistently applied, the
                           revenues and expenses attributable to the EnCana
                           Properties and the other information purported to be
                           shown therein of the EnCana Properties as at the
                           dates thereof and for the periods then ended and
                           reflect all revenues, royalties and operating
                           expenses in respect of the EnCana Properties as at
                           the dates thereof required to be disclosed by
                           generally accepted accounting principles in Canada,
                           and include all adjustments necessary for a fair
                           presentation;

                  (xiii)   to the knowledge of the Trust and Harvest, after due
                           enquiry, the Storm Financial Statements fairly
                           present, in all material respects, in accordance with
                           generally accepted accounting principles in Canada,
                           consistently applied, the financial position and
                           condition, the results of operations, cash flows and
                           the other information purported to be shown therein
                           of Storm as at the dates thereof and for the periods
                           then ended and reflect all assets, liabilities and
                           obligations (absolute, accrued, contingent or
                           otherwise) of Storm as at the dates thereof required
                           to be disclosed by generally accepted accounting
                           principles in Canada, and include all adjustments
                           necessary for a fair presentation;

                  (xiv)    to the knowledge of the Trust and Harvest, the New
                           Properties Financial Statements fairly present in all
                           material respects, in accordance with generally
                           accepted accounting principles in Canada,
                           consistently applied, the revenues and expenses
                           attributable to the New Properties and the other
                           information purported to be shown therein of the New
                           Properties as at the dates thereof and for the
                           periods then ended and reflect all revenues,
                           royalties and operating expenses in respect of the
                           New Properties as at the dates thereof required to be
                           disclosed by generally accepted accounting



                           principles in Canada, and include all adjustments
                           necessary for a fair presentation;

                  (xv)     the Trust Financial Statements fairly present, in
                           accordance with generally accepted accounting
                           principles in Canada, consistently applied, except as
                           disclosed therein, the financial position and
                           condition, the results of operations, cash flows and
                           the other information purported to be shown therein
                           of the Trust, Harvest and their subsidiaries on a
                           consolidated basis as at the dates thereof and for
                           the periods then ended and reflect all assets,
                           liabilities and obligations (absolute, accrued,
                           contingent or otherwise) of the Trust, Harvest and
                           their subsidiaries on a consolidated basis as at the
                           dates thereof required to be disclosed by generally
                           accepted accounting principles in Canada, and include
                           all adjustments necessary for a fair presentation;

                  (xvi)    the pro forma financial statements, including the
                           notes thereto, of the Trust contained in the
                           Prospectuses have been prepared in accordance with
                           Canadian generally accepted accounting principles,
                           consistently applied, have been prepared and
                           presented in accordance with Applicable Securities
                           Laws, and include all adjustments necessary for a
                           fair presentation; the assumptions contained in such
                           pro forma financial statements are suitably supported
                           and consistent with the financial results of the
                           Trust, Storm, the EnCana Properties and the New
                           Properties and such statements provide a reasonable
                           basis for the compilation of the pro forma financial
                           statements and such pro forma financial statements
                           accurately reflect such assumptions;

                  (xvii)   no authorization, approval or consent of any court or
                           governmental authority or agency is required to be
                           obtained by the Trust or Harvest in connection with
                           the sale and delivery of the Offered Securities or
                           the Trust Units issuable pursuant to the Offered
                           Receipts or the Trust Units issuable upon the
                           conversion or redemption of the Offered Debentures
                           hereunder, except such as may be required by the
                           Exchange or under the Applicable Securities Laws;

                  (xviii)  to the knowledge of the Trust and Harvest after due
                           enquiry, there are no actions, suits, proceedings or
                           inquiries pending or (as far as the Trust or Harvest
                           are aware) threatened against or affecting the Trust,
                           Harvest or their subsidiaries at law or in equity or
                           before or by any federal provincial, municipal or
                           other governmental department, commission, board,
                           bureau, agency or instrumentality which in any way
                           materially adversely affects, or may in any way
                           materially adversely affect, the business,
                           operations, capital, properties, assets, liabilities
                           (absolute, accrued, contingent or otherwise),
                           condition (financial or otherwise) or results of
                           operations of the Trust, Harvest and their
                           subsidiaries (taken as a whole) or which affects or
                           may affect the distribution of the Offered
                           Securities, the Trust Units issuable pursuant to the
                           Offered Receipts or the Trust Units issuable on the



                           conversion or redemption of the Offered Debentures;

                  (xix)    each of the Trust and the Operating Subsidiaries has
                           conducted and is conducting its business in all
                           material respects in compliance with all applicable
                           laws, rules and regulations of each jurisdiction in
                           which it carries on business and holds all material
                           licences, registrations and qualifications in all
                           jurisdictions in which it carries on business
                           necessary to carry on its business as now conducted
                           and as contemplated to be conducted in the
                           Prospectuses, including, without limitation,
                           performing its obligations under the Material
                           Agreements to which it is a party, except where such
                           non-compliance or lack of license, registration or
                           qualification, in aggregate, would not have a
                           material adverse affect on the capital, assets,
                           liabilities (absolute, accrued, contingent or
                           otherwise), business, operations or condition
                           (financial or otherwise) or the results of the
                           operations of the Trust, Harvest and their
                           subsidiaries (taken as a whole);

                  (xx)     each of the Material Agreements is properly described
                           as to parties, dates, terms, conditions and
                           amendments thereto, each of such agreements is a
                           legal, valid and binding obligation of the Trust and
                           the Operating Subsidiaries, as the case may be,
                           enforceable against such parties in accordance with
                           its terms subject to the general qualifications set
                           forth in the opinion of the Trust's counsel to be
                           delivered pursuant to paragraph 13(a)(viii) and each
                           of the Trust and the Operating Subsidiaries, as
                           applicable, are in compliance with the terms of such
                           Material Agreements except where such noncompliance,
                           in aggregate, would not have a material adverse
                           affect on the capital, assets, liabilities (absolute,
                           accrued, contingent or otherwise), business,
                           operations or condition (financial or otherwise) or
                           the results of the operations of the Trust, Harvest
                           and their subsidiaries (taken as a whole) and neither
                           the Trust or Harvest is aware of any default or
                           breach of a material nature under any such Material
                           Agreements by any other party thereto;

                  (xxi)    the information and statements set forth in the
                           Public Record to the extent incorporated by reference
                           in the Prospectuses were true, correct, and complete
                           in all material respects and did not contain any
                           misrepresentation, as of the date of such information
                           or statements;

                  (xxii)   the authorized capital of the Trust consists of an
                           unlimited number of Trust Units of which 43,813,598
                           Trust Units were issued and outstanding, as at July
                           8, 2005;

                  (xxiii)  no person holds any securities convertible into or
                           exchangeable for Trust Units or has any agreement,
                           warrant, option, right or privilege being or capable
                           of becoming an agreement, warrant, option or right
                           for the acquisition of any unissued Trust Units or
                           other securities of the Trust except for (a)
                           1,537,025 Trust Units issuable on exercise of rights
                           granted to directors, officers and employees of
                           Harvest pursuant to the Trust's Unit



                           Incentive Plan, (b) 10,930 Trust Units issuable
                           pursuant to the Trust's Unit Award Incentive Plan,
                           (c) Trust Units issuable from time to time pursuant
                           to the Trust's DRIP Plan, (d) any Trust Units that
                           may be issued from time to time pursuant to the
                           Equity Bridge Notes, (e) Trust Units issuable in
                           accordance with the terms of 239,882 Harvest
                           Exchangeable Shares which as at July 8, 2005 were
                           outstanding, (f) Trust Units issuable on the
                           conversion or redemption of the $2,601,000 principal
                           amount of 9% Debentures which as at July 8, 2005 were
                           outstanding, (g) Trust units issuable on the
                           conversion or redemption of the $7,573,000 principal
                           amount of 8% Debentures which as at July 8, 2005 were
                           outstanding, and (h) Trust Units issuable from time
                           to time pursuant to the Trust's Unit Award Incentive
                           Plan;

                  (xxiv)   no Securities Commission, the Exchange or similar
                           regulatory authority has issued any order preventing
                           or suspending trading in any securities of the Trust
                           and no proceedings, investigations or inquiries for
                           such purpose are pending or contemplated or (as far
                           as the Trust or Harvest are aware) threatened;

                  (xxv)    Valiant Trust Company at its principal office in the
                           cities of Calgary, Alberta and Toronto, Ontario is
                           the duly appointed registrar and transfer agent of
                           the Trust with respect to the Trust Units;

                  (xxvi)   Valiant Trust Company will on the Closing Date be the
                           duly appointed transfer agent of the Subscription
                           Receipts, escrow agent under the Subscription Receipt
                           Agreement, trustee under the Debenture Trust
                           Indenture, and, at its principal office in the cities
                           of Calgary and Toronto will on the Closing Date be
                           the duly appointed registrar and transfer agent of
                           the Trust with respect to the Offered Debentures;

                  (xxvii)  the record or minute books of the Trust and the
                           Operating Subsidiaries are true and correct and at
                           the Closing Date will contain the minutes of all
                           meetings (either executed or in draft form) and all
                           resolutions of the trustees and of the directors,
                           shareholders and unitholders of the Trust and the
                           Operating Subsidiaries;

                  (xxviii) other than as provided for in this agreement, neither
                           the Trust nor any of the Operating Subsidiaries has
                           incurred any obligation or liability (absolute,
                           accrued, contingent or otherwise) for brokerage fees,
                           finder's fees, agent's commission or other similar
                           forms of compensation with respect to the offering
                           contemplated herein;

                  (xxix)   the issued and outstanding Trust Units are listed and
                           posted for trading on the Exchange and the Offered
                           Receipts, the Offered Debentures and the Trust Units
                           issuable pursuant to the Offered Receipts and the
                           Trust Units issuable on the conversion or redemption
                           of the Offered Debentures will be listed and posted
                           for trading on the Exchange upon the Trust complying



                           with the usual conditions imposed by the Exchange
                           with respect thereto;

                  (xxx)    the Trust is a "reporting issuer" in the provinces of
                           British Columbia, Alberta, Saskatchewan, Ontario,
                           Quebec, New Brunswick, Newfoundland and Labrador and
                           Nova Scotia within the meaning of the Applicable
                           Securities Laws in such provinces and has equivalent
                           status in the provinces of Manitoba and Prince Edward
                           Island and is not in default of any requirement of
                           the Applicable Securities Laws;

                  (xxxi)   the definitive form of certificates for the Trust
                           Units are, and the definitive form of certificates
                           for the Offered Receipts and the Offered Debentures
                           will on the Closing Date be, in due and proper form
                           under the laws governing the Trust and in compliance
                           with the requirements of the Exchange;

                  (xxxii)  the Trust and Harvest have made available to the
                           Engineers, prior to the issuance of the Reserve
                           Report, for the purpose of preparing the Reserve
                           Report, all information requested by the Engineers,
                           which information did not contain any material
                           misrepresentation at the time such information was
                           provided. Except with respect to changes in the
                           prices of oil and gas, neither the Trust nor Harvest
                           has any knowledge of a material adverse change in any
                           production, operating expenses, reserves or other
                           relevant information provided to the Engineers (taken
                           as a whole) since the date that such information was
                           so provided. Each of the Trust and Harvest believes
                           that. taken as a whole, the Reserve Report reasonably
                           presents the quantity and pre-tax present worth
                           values of the oil and gas reserves attributable to
                           the crude oil, natural gas liquids and natural gas
                           properties evaluated in such report as at December
                           31, 2004 based upon information available at the time
                           such reserves information was prepared, and the Trust
                           and Harvest believe that at the date of such reports
                           they did not (and as of the date hereof, except as
                           may be attributable to production since the date of
                           such reports does not) overstate the aggregate
                           quantity or pre-tax present worth values of such
                           reserves or the estimated monthly production volumes
                           therefrom;

                  (xxxiii) neither the Trust nor Harvest has any knowledge of a
                           material adverse change in any reserves information
                           contained in the Sproule Report and the Trust and
                           Harvest believe that the Prospectuses reasonably
                           present the quantity and pre-tax present worth values
                           of the crude oil, natural gas liquids and natural gas
                           reserves attributable to the New Properties as at
                           March 31, 2005 (or as of the date hereof, except as
                           may be attributable to production since the
                           respective date of each such report) based upon
                           information available at the time such information
                           was prepared;

                  (xxxiv)  neither the Trust nor Harvest is aware of any
                           defects, failures or impairments in the title of
                           Harvest or any of the Operating Subsidiaries to the
                           crude oil, natural gas liquids and natural gas
                           properties disclosed in the



                           Prospectuses, whether or not an action, suit,
                           proceeding or inquiry is pending or threatened or
                           whether or not discovered by any third party, which
                           in aggregate could have a material adverse effect on:
                           (a) the quantity and pre-tax present worth values of
                           crude oil, natural gas liquids and natural gas
                           reserves of Harvest or the Operating Subsidiaries as
                           disclosed in the Prospectuses; (b) the current
                           production volumes of the Operating Subsidiaries; or
                           (c) the current cash flow of the Operating
                           Subsidiaries;

                  (xxxv)   neither the Trust nor Harvest is aware of any
                           defects, failures or impairments in the title the
                           Vendor or any of its subsidiaries to the New
                           Properties, whether or not an action, suit,
                           proceeding or inquiry is pending or threatened or
                           whether or not discovered by any third party which in
                           aggregate could have a material adverse effect on:
                           (A) the quantity and pre-tax present worth values of
                           the New Properties; (B) the current production
                           volumes of the New Properties; or (C) the current
                           cash flow of the New Properties;

                  (xxxvi)  to the knowledge of the Trust and Harvest, the Trust
                           has good and marketable title to the Trust Assets,
                           free and clear of all liens, charges, encumbrances
                           and security interests of any nature or kind, except
                           as described in the Prospectuses or the Trust
                           Financial Statements;

                  (xxxvii) each of the Trust and the Operating Subsidiaries have
                           been and are in material compliance with all
                           applicable federal, state, municipal and local laws,
                           statutes, ordinances, by-laws and regulations and
                           orders, directives and decisions rendered by any
                           ministry, department or administrative or regulatory
                           agency, domestic or foreign, ("Environmental Laws")
                           relating to the protection of the environment,
                           occupational health and safety or the processing,
                           use, treatment, storage, disposal, discharge,
                           transport or handling of any pollutants,
                           contaminants, chemicals or industrial, toxic or
                           hazardous wastes or substance;

                  (xxxviii)each of the Trust and the Operating Subsidiaries have
                           obtained all material licences, permits, approvals,
                           consents, certificates, registrations and other
                           authorizations under Environmental Laws (the
                           "Environmental Permits") necessary for the operation
                           of their projects as currently operated and each
                           Environmental Permit is valid, subsisting and in good
                           standing and the holders of the Environmental Permits
                           are not in default or breach thereof and no
                           proceeding is pending or threatened to revoke or
                           limit any Environmental Permit, except in each case
                           where the result would not have a material adverse
                           effect on either the Trust or the Operating
                           Subsidiaries;

                  (xxxix)  neither the Trust nor any Operating Subsidiary
                           (including, if applicable, any predecessor companies
                           thereof) have received any notice of, or been
                           prosecuted for an offence alleging, material
                           noncompliance with any Environmental Laws, and
                           neither the Trust nor any Operating Subsidiary
                           (including, if applicable, any predecessor companies)
                           have settled any



                           allegation of material non-compliance short of
                           prosecution. There are no order or directions
                           relating to environmental matters requiring any
                           material work, repairs, construction or capital
                           expenditures to be made with respect to any of the
                           assets of the Trust or any Operating Subsidiary, nor
                           has either the Trust or any Operating Subsidiary
                           received notice of any of the same and which orders
                           directions or notices remain outstanding as
                           unresolved;

                  (xl)     Harvest has the necessary power and authority to
                           execute and deliver the Prospectuses on behalf of the
                           Trust and all requisite action has been taken by
                           Harvest to authorize the execution and delivery by it
                           of the Prospectuses on behalf of the Trust;

                  (xli)    the Trust is not an "investment company" within the
                           meaning of that term under the United States
                           Investment Company Act of 1940 and the Trust has
                           complied and will comply with the representations,
                           warranties and covenants of the Trust set forth in
                           Schedule "A" hereto;

                  (xlii)   the attributes and characteristics of the Offered
                           Receipts, the Offered Debentures and the Trust Units
                           conform in all material respects to the attributes
                           and characteristics thereof described in the
                           Prospectuses; and

                  (xliii)  with such exceptions as are not material to the
                           Trust, Harvest and their subsidiaries (taken as a
                           whole), the Trust and each of the Operating
                           Subsidiaries has duly and on a timely basis filed all
                           tax returns required to be filed by it, has paid all
                           taxes due and payable by it and has paid all
                           assessments and reassessments and all other taxes,
                           governmental charges, penalties, interest and other
                           fines due and payable by it and which were claimed by
                           any governmental authority to be due and owing and
                           adequate provision has been made for taxes payable
                           for any completed fiscal period for which tax returns
                           are not yet required and there are no agreements,
                           waivers, or other arrangements providing for an
                           extension of time with respect to the filing of any
                           tax return or payment of any tax, governmental charge
                           or deficiency by the Trust or any of the Operating
                           Subsidiaries and to the best of the knowledge,
                           information and belief of the Trust and Harvest there
                           are no actions, suits, proceedings, investigations or
                           claims threatened or pending against the Trust or any
                           of the Operating Subsidiaries, in respect of taxes,
                           governmental charges or assessments or any matters
                           under discussion with any governmental authority
                           relating to taxes, governmental charges or
                           assessments asserted by any such authority;

                  (xliv)   the representations and warranties of HBT1 and HBT2
                           in the Acquisition Agreement, true copies of which
                           have been provided to the Underwriters, are true and
                           correct as of the date hereof, except as such would
                           not have a material adverse effect on the business,
                           operations, capital, properties, assets, liabilities
                           (absolute, accrued, contingent or otherwise),
                           condition (financial or otherwise) or results of
                           operations of the Trust, Harvest and their
                           subsidiaries (taken as a whole);



                  (xlv)    neither the Trust nor Harvest has any reason to
                           believe that the representations and warranties of
                           the Vendor in the Acquisition Agreement are not true
                           and correct as of the date hereof or that the Vendor,
                           is in breach of any covenants of the Vendor, in the
                           Acquisition Agreement, except, such as would not have
                           a material adverse effect on the business,
                           operations, capital, properties, assets, liabilities
                           (absolute, accrued, contingent or otherwise) or
                           results of operations of the New Properties, the
                           Trust or Harvest;

                  (xlvi)   to the knowledge of the Trust and Harvest, no event
                           has occurred or condition exists which will prevent
                           the Acquisition from being completed prior to 5:00
                           p.m. (Calgary time) on August 2, 2005; and

                  (xlvii)  the Trust shall pay the Special Interest on the Trust
                           Units issued upon exercise of the Offered Receipts.

9.       Indemnity

         (a)      Each of the Trust and Harvest, jointly and severally, shall
                  indemnify and save harmless each of the Underwriters, and each
                  of the Underwriters' agents, directors, officers, shareholders
                  and employees harmless against and from all liabilities,
                  claims, demands, losses (other than losses of profit in
                  connection with the distribution of the Offered Securities),
                  costs (including, without limitation, legal fees and
                  disbursements on a full indemnity basis), damages and expenses
                  to which the Underwriters, or any of the Underwriters' agents,
                  directors, officers, shareholders or employees may be subject
                  or which the Underwriters, or any of the Underwriters' agents,
                  directors, officers, shareholders or employees may suffer or
                  incur, whether under the provisions of any statute or
                  otherwise, in any way caused by, or arising directly or
                  indirectly from or in consequence of:

                  (i)      any information or statement contained in the
                           Preliminary Prospectus, the Prospectus, any
                           Supplementary Material or in any other document or
                           material filed or delivered pursuant hereto (other
                           than any information or statement relating solely to
                           the Underwriters and furnished to the Trust by the
                           Underwriters expressly for inclusion in the
                           Preliminary Prospectus, the Prospectus or any
                           Supplementary Material or in any other document or
                           material filed or delivered pursuant hereto) which is
                           or is alleged to be untrue or any omission or alleged
                           omission to provide any information or state any fact
                           (other than any information or fact relating solely
                           to the Underwriters) the omission of which makes or
                           is alleged to make any such information or statement
                           untrue or misleading in light of the circumstances in
                           which it was made;

                  (ii)     any misrepresentation or alleged misrepresentation
                           (except a misrepresentation which is based upon
                           information relating solely to the Underwriters and
                           furnished to the Trust by the Underwriters expressly
                           for inclusion in the Preliminary Prospectus, the
                           Prospectus or any Supplementary Materials or in any
                           other document or material filed or



                           delivered pursuant hereto) contained in the
                           Preliminary Prospectus, the Prospectus, any
                           Supplementary Materials or in any other document or
                           any other part of the Public Record filed by or on
                           behalf of the Trust;

                  (iii)    any misrepresentation or alleged misrepresentation
                           contained in the responses (taken as a whole)
                           provided to the Underwriters by the Trust, Harvest or
                           the directors of Harvest, any committee of the
                           directors of Harvest or any one member of such
                           committee, or officers of Harvest, in the Due
                           Diligence Session (other than any portion of such
                           responses that are forward-looking or related to
                           projections or forecasts);

                  (iv)     any prohibition or restriction of trading in the
                           securities of the Trust or any prohibition or
                           restriction affecting the distribution of the Offered
                           Securities or Trust Units issuable pursuant to the
                           Offered Receipts or the Trust Units issuable upon
                           conversion or redemption of the Offered Debentures
                           imposed by any competent authority if such
                           prohibition or restriction is based on any
                           misrepresentation or alleged misrepresentation of a
                           kind referred to in subparagraph 9(a)(ii);

                  (v)      any order made or any inquiry, investigation (whether
                           formal or informal) or other proceeding commenced or
                           threatened by any one or more competent authorities
                           (not based upon the activities or the alleged
                           activities of the Underwriters or their banking or
                           Selling Dealer Group members, if any) prohibiting,
                           restricting, relating to or materially affecting the
                           trading or distribution of the Offered Securities or
                           the Trust Units issuable pursuant to the Offered
                           Receipts or the Trust Units issuable upon the
                           conversion or redemption of the Offered Debentures;
                           or

                  (vi)     any breach of, default under or non-compliance by the
                           Trust or Harvest with any requirements of the
                           Applicable Securities Laws, the by-laws, rules or
                           regulations of the Exchange or any representation,
                           warranty, term or condition of this agreement or in
                           any certificate or other document delivered by or on
                           behalf of the Trust or Harvest hereunder or pursuant
                           hereto; provided, however, no party who has engaged
                           in any fraud, wilful misconduct, fraudulent
                           misrepresentation or negligence shall be entitled, to
                           the extent that the liabilities, claims, losses,
                           costs, damages or expenses were caused by such
                           activity, to claim indemnification from any person
                           who has not engaged in such fraud, wilful misconduct,
                           fraudulent misrepresentation or negligence (provided
                           that for greater certainty, the foregoing shall not
                           disentitle an Underwriter from claiming
                           indemnification hereunder to the extent that the
                           negligence, if any, relates to the Underwriter's
                           failure to conduct adequate "due diligence").

         (b)      If any claim contemplated by paragraph 9(a) shall be
                  asserted against any of the persons or corporations in respect
                  of which indemnification is or might reasonably be considered
                  to be provided for in such paragraphs, such person or
                  corporation (the "Indemnified Person") shall notify the Trust
                  and Harvest (collectively the "Indemnifying Parties")
                  (provided that failure to so notify the Indemnifying Parties
                  of the nature of such claim in a timely fashion shall relieve
                  the Indemnifying Parties of liability hereunder only if and to
                  the extent that such failure materially prejudices the
                  Indemnifying Parties' ability to defend such claim) as soon as
                  possible of the nature of such claim and the Indemnifying
                  Parties shall be entitled (but not required) to assume



                  the defence of any suit brought to enforce such claim,
                  provided however, that the defence shall be through legal
                  counsel selected by the Indemnifying Parties and acceptable to
                  the Indemnified Person acting reasonably and that no
                  settlement may be made by the Indemnifying Parties or the
                  Indemnified Person without the prior written consent of the
                  other, such consent not to be unreasonably withheld. The
                  Indemnified Person shall have the right to retain its own
                  counsel in any proceeding relating to a claim contemplated by
                  paragraph 9(a) if:

                  (i)      the Indemnified Person has been advised by counsel
                           that there may be a reasonable legal defense
                           available to the Indemnified Person which is
                           different from or additional to a defense available
                           to an Indemnifying Party and that representation of
                           the Indemnified Person and any one or more of the
                           Indemnifying Parties by the same counsel would be
                           inappropriate due to the actual or potential
                           differing interests between them (in which case the
                           Indemnifying Parties shall not have the right to
                           assume the defense of such proceedings on the
                           Indemnified Person's behalf);

                  (ii)     the Indemnifying Parties shall not have taken the
                           defense of such proceedings and employed counsel
                           within ten (10) business days after notice has been
                           given to the Indemnifying Parties of commencement of
                           such proceedings; or

                  (iii)    the employment of such counsel has been authorized by
                           the Indemnifying Parties in connection with the
                           defense of such proceedings;

                  and, in any such event, the reasonable fees and expenses of
                  such Indemnified Person's counsel (on a solicitor and his
                  client basis) shall be paid by the Indemnifying Parties,
                  provided that the Indemnifying Parties shall not, in
                  connection with any one such action or separate but
                  substantially similar or related actions in the same
                  jurisdiction arising out of the same general allegations or
                  circumstances, be liable for the fees and expenses of more
                  than one separate law firm (in addition to any local counsel)
                  for all such Indemnified Persons.

         (c)      Each of the Indemnifying Parties hereby waives its rights to
                  recover contribution from the Underwriters with respect to any
                  liability of the Indemnifying Party by reason of or arising
                  out of any misrepresentation in the Preliminary Prospectus,
                  the Prospectus, any Supplementary Material or any other part
                  of the Public Record provided, however, that such waiver shall
                  not apply in respect of liability caused or incurred by reason
                  of any misrepresentation which is based upon information
                  relating solely to the Underwriters contained in such document
                  and furnished to the Trust by the Underwriters expressly for
                  inclusion in the Preliminary Prospectus or the Prospectus.

         (d)      If any legal proceedings shall be instituted against an
                  Indemnifying Party in respect of the Preliminary Prospectus,
                  the Prospectus, any Supplementary Material or any other part
                  of the Public Record or the Offered Securities or the Trust
                  Units issuable pursuant to the Offered Receipts or if any
                  regulatory authority or stock exchange shall carry out an
                  investigation of an Indemnifying Party in respect of the
                  Preliminary Prospectus, the Prospectus, any Supplementary
                  Material or any other part of the Public Record or the Offered
                  Securities or the Trust Units issued pursuant to the Offered
                  Receipts and, in either case, any Indemnified Person is
                  required to testify, or respond to procedures



                  designed to discover information, in connection with or by
                  reason of the services performed by the Underwriters
                  hereunder, the Indemnified Persons may employ their own legal
                  counsel and the Indemnifying Parties shall pay and reimburse
                  the Indemnified Persons for the reasonable fees, charges and
                  disbursements (on a full indemnity basis) of such legal
                  counsel, the other expenses reasonably incurred by the
                  Indemnified Persons in connection with such proceedings or
                  investigation and a fee at the normal per diem rate for any
                  director, officer or employee of the Underwriters involved in
                  the preparation for or attendance at such proceedings or
                  investigation.

         (e)      The rights and remedies of the Indemnified Persons set
                  forth in paragraphs 9, 10 and 11 hereof are to the fullest
                  extent possible in law cumulative and not alternative and the
                  election by any Underwriter or other Indemnified Person to
                  exercise any such right or remedy shall not be, and shall not
                  be deemed to be, a waiver of any other rights and remedies.

         (f)      The Indemnifying Parties hereby acknowledge that the
                  Underwriters are acting as agents for the Underwriters'
                  respective agents, directors, officers, shareholders and
                  employees under this paragraph 9 and under paragraph 10 with
                  respect to all such agents, directors, officers, shareholders
                  and employees.

         (g)      The Indemnifying Parties waive any right they may have of
                  first requiring an Indemnified Person to proceed against or
                  enforce any other right, power, remedy or security or claim or
                  to claim payment from any other person before claiming under
                  this indemnity. It is not necessary for an Indemnified Person
                  to incur expense or make payment before enforcing such
                  indemnity.

         (h)      The rights of indemnity contained in this paragraph 9 shall
                  not apply if the Indemnifying Parties have complied with the
                  provisions of paragraphs 4 and 5 and the person asserting any
                  claim contemplated by this paragraph 9 was not provided with a
                  copy of the Prospectus or any amendment to the Prospectus or
                  other document which corrects any misrepresentation or alleged
                  misrepresentation which is the basis of such claim and which
                  was required, under Applicable Securities Laws, to be
                  delivered to such person by the Underwriters.

         (i)      If the Indemnifying Parties have assumed the defense of any
                  suit brought to enforce a claim hereunder, the Indemnified
                  Person shall provide the Indemnifying Parties copies of all
                  documents and information in its possession pertaining to the
                  claim, take all reasonable actions necessary to preserve its
                  rights to object to or defend against the claim, consult and
                  reasonably cooperate with the Indemnifying Parties in
                  determining whether the claim and any legal proceeding
                  resulting therefrom should be resisted, compromised or settled
                  and reasonably cooperate and assist in any negotiations to
                  compromise or settle, or in any defense of, a claim undertaken
                  by the Indemnifying Parties.

10.      Contribution

         In order to provide for just and equitable contribution in
circumstances in which the indemnification provided for in this agreement is due
in accordance with its terms but is, for any reason, held by a court to be
unavailable from one or more of the Indemnifying Parties on grounds of policy or
otherwise, the Indemnifying Parties and the party or parties seeking
indemnification shall contribute to the aggregate liabilities, claims, demands,
losses (other than losses of profit in connection with the distribution of the
Offered Securities), costs (including, without limitation, legal



fees and disbursements on a full indemnity basis), damages and expenses to which
they may be subject or which they may suffer or incur:

         (a)      in such proportion as is appropriate to reflect the relative
                  benefit received by the Indemnifying Parties on the one hand,
                  and by the Underwriters on the other hand, from the offering
                  of the Offered Securities; or

         (b)      if the allocation provided by paragraph 10(a) above is not
                  permitted by applicable law, in such proportion as is
                  appropriate to reflect not only the relative benefits referred
                  to in paragraph 10(a) above but also to reflect the relative
                  fault of the Underwriters on the one hand, and the
                  Indemnifying Parties, on the other hand, in connection with
                  the statements, commissions or omissions or other matters
                  which resulted in such liabilities, claims, demands, losses,
                  costs, damages or expenses, as well as any other relevant
                  equitable considerations.

         The relative benefits received by the Indemnifying Parties, on the one
hand, and the Underwriters, on the other hand, shall be deemed to be in the same
proportion that the total proceeds of the offering received by the Indemnifying
Parties (net of fees but before deducting expenses) bear to the fees received by
the Underwriters. In the case of liability arising out of the Preliminary
Prospectus, the Prospectus, any Supplementary Material or any other part of the
Public Record, the relative fault of the Indemnifying Parties, on the one hand,
and of the Underwriters, on the other hand, shall be determined by reference,
among other things, to whether the misrepresentation or alleged
misrepresentation, order, inquiry, investigation or other matter or thing
referred to in paragraph 9 relates to information supplied or which ought to
have been supplied by, or steps or actions taken or done on behalf of or which
ought to have been taken or done on behalf of, one or more of the Indemnifying
Parties or the Underwriters and the parties' relative intent knowledge, access
to information and opportunity to correct or prevent such misrepresentation or
alleged misrepresentation, order, inquiry, investigation or other matter or
thing referred to in paragraph 9.

         The amount paid or payable by an Indemnified Person as a result of
liabilities, claims, demands, losses (other than losses of profit in connection
with the distribution of the Offered Securities), costs, damages and expenses
(or claims, actions, suits or proceedings in respect thereof) referred to above
shall, without limitation, include any legal or other expenses reasonably
incurred by the Indemnified Person in connection with investigating or defending
such liabilities, claims, demands, losses, costs, damages and expenses (or
claims, actions, suits or proceedings in respect thereof) whether or not
resulting in any action, suit, proceeding or claim.

         Each of the Indemnifying Parties and the Underwriters agree that it
would not be just and equitable if contributions pursuant to this agreement were
determined by pro rata allocation or by any other method of allocation which
does not take into account the equitable considerations referred to in the
immediately preceding paragraphs. The rights to contribution provided in this
paragraph 10 shall be in addition to, and without prejudice to, any other right
to contribution which the Underwriters or other Indemnified Persons may have.

         Any liability of the Underwriters under this paragraph 10 shall be
limited to the amount actually received by the Underwriters under paragraph 2.

11.      Expenses



         (a)      Whether or not the transactions contemplated herein shall be
                  completed, subject to paragraph 11(b), all costs and expenses
                  (including applicable goods and services tax) of or incidental
                  to the transactions contemplated hereby including, without
                  limitation, those relating to the distribution of the Offered
                  Securities shall be borne by the Trust including, without
                  limitation, all costs and expenses of or incidental to the
                  preparation, filing and reproduction (including the commercial
                  copies thereof) of the Preliminary Prospectus, the Prospectus,
                  any Supplementary Material and the delivery thereof to the
                  Underwriters, the fees and expenses of the Trust's counsel,
                  the fees and expenses of agent counsel retained by the Trust
                  or the Trust's counsel, the fees and expenses of the Trust's
                  transfer agent, auditors, engineers and other outside
                  consultants, all stock exchange listing fees, the expenses
                  related to audio-visual and teleconference presentations,
                  including the costs associated with audio-visual personnel,
                  hotel, food and travel expenses incurred in connection with
                  marketing meetings, and reasonable hotel and travel expenses
                  for the Underwriters incurred in connection with the marketing
                  meetings, the reasonable fees and expenses of the
                  Underwriters' counsel, the fees and expenses related to any
                  newspaper advertisements, all reasonable out-ofpocket expenses
                  incurred by the Underwriters, the cost of preparing record
                  books for all of the parties to this agreement and their
                  respective counsel and all other costs and expenses relating
                  to this transaction.

         (b)      If the purchase and sale of the Offered Securities is not
                  completed in accordance with the terms hereof by reason of a
                  breach by or default of the Underwriters, the Underwriters
                  shall be responsible for all fees, disbursements and expenses
                  of the Underwriters set forth in paragraph 11(a).

12.      Termination

         (a)      The Underwriters, or any of them, may, without liability,
                  terminate their obligations hereunder, by written notice to
                  the Trust in the event that after the date hereof and at or
                  prior to the Closing Time:

                  (i)      any order to cease or suspend trading in any
                           securities of the Trust or Harvest or prohibiting or
                           restricting the distribution of any of the Offered
                           Securities, the Trust Units issuable pursuant to the
                           Offered Receipts or the Trust Units issuable upon the
                           conversion or redemption of the Offered Debentures is
                           made, or proceedings are announced, commenced or
                           threatened for the making of any such order, by any
                           securities commission or similar regulatory
                           authority, the Exchange or any other competent
                           authority, and has not been rescinded, revoked or
                           withdrawn;

                  (ii)     any inquiry, action, suit, investigation (whether
                           formal or informal) or other proceeding in relation
                           to the Trust or any of the Operating Subsidiaries or
                           any of the directors or senior officers of Harvest is
                           announced, commenced or threatened by any securities
                           commission or similar regulatory authority, the
                           Exchange or any other competent authority or there is
                           a change in law, regulation or policy or the
                           interpretation or administration thereof, if, in the
                           reasonable opinion of the Underwriters or any one of
                           them, the change, announcement, commencement or
                           threatening thereof is expected to adversely affect
                           the



                           trading or distribution of the Offered Securities,
                           the Trust Units issuable pursuant to the Offered
                           Receipts or the Trust Units issuable upon the
                           conversion or redemption of the Offered Debentures or
                           any other securities of the Trust or would be
                           expected to have a material adverse effect on the
                           market price or value of the Trust Units or other
                           securities of the Trust;

                  (iii)    there shall have occurred any adverse change, as
                           determined by the Underwriters or any one of them in
                           their sole discretion, acting reasonably, in the
                           senior management of Harvest, or in the business,
                           operations, capital or condition (financial or
                           otherwise), business or business prospects of the
                           Trust or any of the Operating Subsidiaries or the
                           respective properties, assets, liabilities or
                           obligations (absolute, accrued, contingent or
                           otherwise) of the Trust or any of the Operating
                           Subsidiaries which in the Underwriters' opinion,
                           could reasonably be expected to have a material
                           adverse effect on the market price or value of the
                           Offered Receipts, Offered Debentures, the Trust Units
                           issuable pursuant to the Offered Receipts or the
                           Trust Units issuable upon the conversion or
                           redemption of the Offered Debentures or any other
                           securities of the Trust or the investment quality or
                           marketability of the Offered Receipts, the Offered
                           Debentures, the Trust Units issuable pursuant to the
                           Offered Receipts or the Trust Units issuable upon the
                           conversion or redemption of the Offered Debentures;

                  (iv)     there should develop, occur or come into effect or
                           existence, or be announced, any event, action, state,
                           condition or occurrence of national or international
                           consequence, or any law, action, regulation or other
                           occurrence of any nature whatsoever, which, in the
                           sole opinion of the Underwriters or any one of them,
                           acting reasonably, materially adversely affects or
                           involves, or will materially adversely affect or
                           involve, the financial markets generally or the
                           business, operations or affairs of the Trust and its
                           Operating Subsidiaries on a consolidated basis;

                  (v)      the Underwriters shall become aware of any adverse
                           material change with respect to the Trust and its
                           Operating Subsidiaries (taken as a whole) which had
                           not been publicly disclosed or disclosed in writing
                           to the Underwriters at or prior to the date hereof;

                  (vi)     the Trust or Harvest shall be in breach or default
                           under or noncompliance with any representation,
                           warranty, term or condition of this agreement in any
                           material respect;

                  (vii)    there is announced any change or proposed change in
                           the income tax laws of Canada or the interpretation
                           or administration thereof and such change, which in
                           the sole opinion of the Underwriters, or any one of
                           them, acting reasonably, could be expected to have a
                           material adverse effect on the market price or value
                           of the Offered Receipts, the Offered Debentures or
                           the Trust Units; or

                  (viii)   the Acquisition Agreement is terminated or the Trust
                           has advised the Underwriters or announced to the
                           public that it does not intend to proceed with the
                           Acquisition.

         (b)      The Underwriters, or any of them, may exercise any or all of
                  the rights provided for in



                  paragraph 12(a) or paragraph 13 or 17 notwithstanding any
                  material change, change, event or state of facts and (except
                  where the Underwriter purporting to exercise any of such
                  rights is in breach of its obligations under this agreement)
                  notwithstanding any act or thing taken or done by the
                  Underwriters or any inaction by the Underwriters, whether
                  before or after the occurrence of any material change, change,
                  event or state of facts including, without limitation, any act
                  of the Underwriters related to the offering or continued
                  offering of the Offered Securities for sale and any act taken
                  by the Underwriters in connection with any amendment to the
                  Prospectus (including the execution of any amendment or any
                  other Supplementary Material) and the Underwriters shall only
                  be considered to have waived or be estopped from exercising or
                  relying upon any of their rights under or pursuant to
                  paragraph 12(a) or paragraph 13 or 17 if such waiver or
                  estoppel is in writing and specifically waives or estops such
                  exercise or reliance;

         (c)      Any termination pursuant to the terms of this agreement shall
                  be effected by notice in writing delivered to the Trust
                  provided that no termination shall discharge or otherwise
                  affect any obligation of the Trust or Harvest under paragraph
                  9, 10, 11 or 17. The rights of the Underwriters to terminate
                  their obligations hereunder are in addition to, and without
                  prejudice to, any other remedies they may have; and

         (d)      If an Underwriter elects to terminate its obligation to
                  purchase the Offered Securities as aforesaid, whether the
                  reason for such termination is within or beyond the control of
                  the Trust or Harvest the liability of the Trust and Harvest
                  hereunder shall be limited to the indemnity referred to in
                  paragraph 9, the contribution rights referred to in paragraph
                  9 and the payment of expenses referred to in paragraph 11.


13.      Closing Documents

         The obligations of the Underwriters hereunder, as to the Offered
Securities to be purchased at the Closing Time, shall be conditional upon all
representations and warranties and other statements of the Trust and Harvest
herein being, at and as of the Closing Time, true and correct in all material
respects, the Trust and Harvest having performed in all material respects, at
the Closing Time, all of their obligations hereunder theretofore to be performed
and the Underwriters receiving at the Closing Time:

         (a)      favourable legal opinions of the Trust's counsel and the
                  Underwriters' counsel addressed to the Underwriters, in form
                  and substance reasonably satisfactory to the Underwriters,
                  with respect to such matters as the Underwriters may
                  reasonably request relating to the offering of the Offered
                  Securities, the Trust, the Operating Subsidiaries and the
                  transactions contemplated hereby, including, without
                  limitation, that:

                  (i)      the Trust is valid and existing as a trust under the
                           laws of the Province of Alberta and having the
                           Trustee as its trustee;

                  (ii)     each of HST, HBT1 and HBT2 is valid and existing as a
                           trust under the



                           laws of the Province of Alberta;

                  (iii)    each of Red Earth Partnership and BRP is duly formed
                           and validly existing as a general partnership under
                           the laws of the Province of Alberta;

                  (iv)     each of Harvest and Red Earth Energy Inc. has been
                           duly incorporated and is validly subsisting under the
                           jurisdiction of its incorporation;

                  (v)      the Trust has all requisite power and authority to
                           own and lease its assets;

                  (vi)     each of the Operating Subsidiaries has the requisite
                           power and authority to own and lease its properties
                           and assets and to conduct its business and to own its
                           properties and assets under the laws of the
                           jurisdictions where it carries on a material part of
                           its business;

                  (vii)    the Trust is the registered and beneficial holder of
                           all issued and outstanding shares of Harvest (other
                           than the Harvest Exchangeable Shares) and trust units
                           of each of HST and HBT2, and HST is the registered
                           and beneficial owner of all issued and outstanding
                           trust units of HBT1, in each case all of which have
                           been duly authorized and validly issued as fully paid
                           and non-assessable;

                  (viii)   each of Harvest, on behalf of the trustee of the
                           Trust, Harvest (on its own behalf and as trustee of
                           HST), 1115638 Alberta Ltd. as trustee of HBTI,
                           1115650 Alberta Ltd. as trustee of HBT2 and the other
                           Operating Subsidiaries has all necessary trust or
                           corporate power and authority to enter into this
                           agreement, the Subscription Receipt Agreement, the
                           Debenture Trust Indenture and the Material Agreements
                           to which it is a party and to perform its obligations
                           set out herein and therein, as applicable, and each
                           of this agreement, the Subscription Receipt
                           Agreement, the Debenture Trust Indenture and the
                           Material Agreements have been duly authorized,
                           executed and delivered, as applicable, by Harvest, on
                           behalf of the trustee of the Trust, Harvest (on its
                           own behalf and as trustee of HST), 1115638 Alberta
                           Ltd. as trustee of HBT1, 1115650 Alberta Ltd. as
                           trustee of HBT2 and the other Operating Subsidiaries,
                           as applicable, and constitutes a legal, valid and
                           binding obligation of each of the Trust, Harvest and
                           the other Operating Subsidiaries enforceable against
                           the Trust, Harvest and the other Operating
                           Subsidiaries, as applicable, in accordance with their
                           terms except that the validity, binding effect and
                           enforceability of the terms of agreements and
                           documents are subject to the qualification that such
                           validity, binding effect and enforceability may be
                           limited by:

                           (A)      applicable bankruptcy, insolvency,
                                    moratorium, reorganization or other laws
                                    affecting creditors' rights generally;

                           (B)      general principles of equity, including the
                                    fact that equitable remedies, including the
                                    remedies of specific performance and
                                    injunctive relief, are available only in the
                                    discretion of the applicable court;

                           (C)      the statutory and inherent powers of a court
                                    to grant relief from forfeiture, to stay
                                    execution of proceedings before it and to
                                    stay executions on judgments; and

                           (D)      the applicable laws regarding limitations of
                                    actions.

                           Notwithstanding the foregoing:



                           (E)      no opinion shall be expressed as to the
                                    enforceability of provisions which purport
                                    to sever any provision which is prohibited
                                    or unenforceable under applicable law
                                    without affecting the enforceability or
                                    validity of the remainder of such documents
                                    would be determined only in the discretion
                                    of the court;
                           (F)      the enforceability of any provisions
                                    exculpating a party from liability or duty
                                    otherwise owed by it may be limited under
                                    applicable law; and
                           (G)      the enforceability of rights to indemnity,
                                    contribution and waiver under the documents
                                    may be limited or unavailable under
                                    applicable law;

                  (ix)     the execution and delivery of this agreement, the
                           Subscription Receipt Agreement and the Debenture
                           Trust Indenture and the fulfillment of the terms
                           hereof and thereof by each of the Trust and Harvest
                           and the performance of and compliance with the terms
                           of each of this agreement, the Subscription Receipt
                           Agreement and the Debenture Trust Indenture by
                           Harvest on behalf of the trustee of the Trust and
                           Harvest, on its own behalf, does not and will not
                           result in a breach of, or constitute a default under,
                           and does not create a state of facts which, after
                           notice or lapse of time or both, will result in a
                           breach of or constitute a default under, (i) any
                           applicable laws; (ii) any term or provision of the
                           Trust Indenture, (iii) the articles, by-laws or
                           constating documents of the Trust or Harvest, as
                           applicable, (iv) any resolutions of the unitholders
                           or the directors (or any committee thereof) or
                           shareholders of the Trust or Harvest, as applicable,
                           (v) any mortgage, note, indenture, contract,
                           agreement (written or oral), instrument, lease or
                           other document to which the Trust or Harvest is a
                           party or by which it is bound, of which such counsel
                           is aware including, without limitation, the Material
                           Agreements, or (vi) any judgment, order or decree of
                           any court, governmental agency or body or regulatory
                           authority having jurisdiction over or binding the
                           Trust or Harvest or their respective properties or
                           assets or the Offered Securities, of which such
                           counsel is aware;

                  (x)      the forms of the definitive certificate representing
                           the Offered Receipts, Offered Debentures and Trust
                           Units have been approved and adopted by the Trust and
                           comply with all legal requirements (including all
                           applicable requirements of the Exchange) relating
                           thereto;

                  (xi)     the Offered Receipts and the Offered Debentures have
                           been duly and validly created, allotted and issued as
                           fully paid and non-assessable Subscription Receipts
                           and Debentures, respectively, of the Trust;

                  (xii)    the Trust Units issuable pursuant to the Offered
                           Receipts and the Trust Units issuable upon conversion
                           or redemption of the Offered Debentures will, upon
                           issuance in accordance with the terms of the
                           Subscription Receipt Agreement, the Debenture Trust
                           Indenture and the Trust Indenture, as applicable, be
                           issued as fully paid and nonassessable Trust Units of
                           the Trust;

                  (xiii)   the Trust and the attributes of the Offered Receipts,
                           the Offered Debentures and the Trust Units issuable
                           pursuant to the Offered Receipts



                           or upon the conversion or redemption of the Offered
                           Debentures conform in all material respects with the
                           description thereof contained in the Prospectuses;

                  (xiv)    the Offered Receipts, the Offered Debentures and the
                           Trust Units issuable pursuant to the Offered Receipts
                           or upon the conversion or redemption of the Offered
                           Debentures are eligible investments as set out under
                           the heading "Eligibility for Investment" in the
                           Prospectuses;

                  (xv)     all necessary documents have been filed, all
                           necessary proceedings have been taken and all legal
                           requirements have been fulfilled as required under
                           the Applicable Securities Laws of each of the
                           Qualifying Provinces in order to qualify the Offered
                           Securities for distribution and sale to the public in
                           each of such Qualifying Provinces by or through
                           investment dealers and brokers duly registered under
                           the applicable laws of such provinces who have
                           complied with the relevant provisions of such
                           Applicable Securities Laws;

                  (xvi)    based on Applicable Securities Laws in effect as of
                           the Closing Date, neither the distribution of Trust
                           Units issuable pursuant to the Offered Receipts or on
                           the conversion or redemption of the Offered
                           Debentures, nor the first trade in such Trust Units,
                           will be subject to the prospectus requirements of
                           Applicable Securities Laws, and no other filing,
                           proceeding, approval, consent or authorization will
                           be required to be made, taken or obtained pursuant to
                           Applicable Securities Laws in connection with such
                           issuance or trade;

                  (xvii)   the Trust is a "reporting issuer" not in default of
                           any requirement of the Securities Act (Alberta) and
                           the regulations thereunder and has a similar status
                           under the Applicable Securities Laws of each of the
                           other Qualifying Provinces that have the "reporting
                           issuer" concept;

                  (xviii)  each of the Trust and Harvest have the necessary
                           power and authority to execute and deliver the
                           Prospectuses and all necessary action has been taken
                           by each of the Trust and Harvest to authorize the
                           execution and delivery by it of the Prospectuses and
                           the filing thereof, as the case may be, in each of
                           the Qualifying Provinces in accordance with
                           Applicable Securities Laws;

                  (xix)    subject to the qualifications set out therein, the
                           statements in the Prospectus under the heading
                           "Canadian Federal Income Tax Considerations"
                           constitute a fair summary of the principal Canadian
                           federal income tax consequences arising under the Tax
                           Act to persons referred to therein who hold Offered
                           Securities;

                  (xx)     the Offered Receipts, the Offered Debentures, the
                           Trust Units issuable pursuant to the Offered Receipts
                           and the Trust Units issuable upon the conversion or
                           redemption of the Offered Debentures are
                           conditionally listed on the Exchange and, upon
                           notification to the Exchange of the issuance and sale
                           thereof and fulfillment of the conditions of the
                           Exchange, will be posted for trading on the Exchange;



                  (xxi)    the authorized and issued capital of the Trust;

                  (xxii)   Valiant Trust Company at its principal offices in
                           Calgary, Alberta and Toronto, Ontario has been duly
                           appointed the transfer agent and registrar for the
                           Trust Units, the Offered Receipts and the Offered
                           Debentures, and has been duly appointed the trustee
                           under the Debenture Trust Indenture and the escrow
                           agent under the Subscription Receipt Agreement;

         and as to all other legal matters, including compliance with Applicable
Securities Laws in any way connected with the issuance, sale and delivery of the
Offered Securities as the Underwriters may reasonably request.

It is understood that the respective counsel may rely on the opinions of local
counsel acceptable to them as to matters governed by the laws of jurisdictions
other than where they are qualified to practice law, and on certificates of
officers of the Trust, Harvest, the transfer agent and the Trust's auditors as
to relevant matters of fact. It is further understood that the Underwriters'
counsel may rely on the opinion of the Trust's counsel as to matters which
specifically relate to the Trust, the Operating Subsidiaries or the Trust Units,
including the issuance of the Offered Securities;

         (b)      a certificate of each of the Trust and Harvest dated the
                  Closing Date addressed to the Underwriters and signed on
                  behalf of the Trust and Harvest by the President and Vice
                  President, Finance of Harvest or such other officers or
                  directors of Harvest satisfactory to the Underwriters, acting
                  reasonably, certifying that:

                  (i)          each of the Trust and Harvest has complied with
                               and satisfied in all material respects all terms
                               and conditions of this agreement on its part to
                               be complied with or satisfied at or prior to the
                               Closing Time;

                  (ii)         the representations and warranties of the Trust
                               and Harvest set forth in this agreement are true
                               and correct in all material respects at the
                               Closing Time, as if made at such time; and

                  (iii)        no event of a nature referred to in paragraph
                               7(a), 7(b), 12(a)(i), 12(a)(ii), 12(a)(iii) or
                               12(a)(vi) has occurred or to the knowledge of
                               such officer is pending, contemplated or
                               threatened;

and the Underwriters shall have no knowledge to the contrary;

         (c)      a comfort letter of each of the Trust's auditors, the New
                  Properties' auditors, Storm's auditors and the EnCana
                  Properties' auditors addressed to the Underwriters and dated
                  the Closing Date, satisfactory in form and substance to the
                  Underwriters, acting reasonably, bringing the information
                  contained in the comfort letter or letters referred to in
                  paragraph 5(c) hereof up to the Closing Time, which comfort
                  letter shall be not more than two Business Days prior to the
                  Closing Date;

         (d)      evidence satisfactory to the Underwriters that the Offered
                  Receipts, the Offered Debentures, the Trust Units issuable
                  pursuant to the Offered Receipts and the Trust Units issuable
                  on the conversion of the Offered Debentures have been
                  conditionally listed on the Exchange, in each case not later
                  than the close of business on the last



                  Business Day preceding the Closing Date, in the case of the
                  Offered Receipts and Offered Debentures, and upon notice to
                  the Exchange, in the case of the Trust Units issuable pursuant
                  to the Offered Receipts and the Trust Units issuable on the
                  conversion or redemption of the Offered Debentures, and shall
                  be posted for trading as at the opening of business on the
                  Closing Date or first trading date after notice of such
                  issuance, as applicable;

         (e)      evidence satisfactory to the Underwriters that the Special
                  Interest, if any, will be paid on the Trust Units issuable
                  pursuant to the Offered Receipts;

         (f)      evidence satisfactory to the Underwriters that the Acquisition
                  Agreement has not been terminated and that no event has
                  occurred or condition exists which will prevent the
                  Acquisition from being completed prior to 5:00 p.m. (Calgary
                  time) on September 30, 2005 substantially and in all material
                  respects as contemplated in the Acquisition Agreement, and as
                  such agreements are described in the Prospectus; and

         (g)      such other certificates and documents as the Underwriters may
                  request, acting reasonably.


14.      Deliveries

         (a)      The sale of the Offered Receipts and Offered Debentures to be
                  purchased hereunder shall be completed at the Closing Time at
                  the offices of the Trust's counsel in Calgary, Alberta or at
                  such other place as the Trust and the Underwriters may agree.
                  Subject to the conditions set forth in paragraph 13, the
                  Underwriters, on the Closing Date, shall deliver (A) to the
                  Trust the amount of $1,000 for each Offered Debenture (which
                  amount will be $75,000,000) by wire transfer, in respect of
                  the Offered Debentures); and (B) to the Escrow Agent, on
                  behalf of the Trust, the amount of $26.90 for each Offered
                  Receipt (which amount will be $175,000,640), by wire transfer,
                  against delivery by the Trust of:

                  (i)      the opinions, certificates and documents referred to
                           in paragraph 13;

                  (ii)     definitive certificates representing, in the
                           aggregate, all of the Offered Receipts and Offered
                           Debentures registered, subject to paragraph (b)
                           below, in the name of National Bank Financial Inc. or
                           in such name or names as the Underwriters shall
                           notify the Trust in writing not less than 24 hours
                           prior to the Closing Time; and

                  (iii)    payment to National Bank Financial Inc., by certified
                           cheque, bank draft or wire transfer or such other
                           means as Harvest and the Underwriters may agree, of
                           the fee provided for in paragraph 3(a) in respect of
                           the Offered Receipts and Offered Debentures, being an
                           aggregate fee of $7,375,016.


         (b)      If the Trust determines to issue the Offered Debentures as a
                  book-entry only security in accordance with the rules and
                  procedures of The Canadian Depository for Securities Limited
                  ("CDS"), then, as an alternative to the Trust delivering to
                  the



                  Underwriters definitive certificates representing the Offered
                  Debentures in the manner and at the times set forth in this
                  paragraph 14:

                  (i)          the Underwriters will provide a direction to CDS
                               with respect to the crediting of the Offered
                               Debentures to the accounts of the participants of
                               CDS as shall be designated by the Underwriters in
                               writing in sufficient time prior to the Closing
                               Date to permit such crediting; and

                  (ii)         the Trust shall cause Valiant Trust Company, as
                               registrar and transfer agent of the Offered
                               Debentures, to deliver to CDS, on behalf of the
                               Underwriters, one fully registered global
                               certificate for the Offered Debentures to be
                               purchased hereunder, registered in the name of
                               "CDS & Co." as the nominee of CDS, to be held by
                               CDS as a book-entry only security in accordance
                               with the rules and procedures of CDS.

15.      Restrictions on Offerings

         The Trust agrees that prior to 90 days after the Closing Date, it shall
not directly or indirectly, sell or offer to sell any Trust Units or debentures
having attributes similar to those of the Offered Debentures, or otherwise lend,
transfer or dispose of any securities exchangeable, convertible or exercisable
into Trust Units or debentures having attributes similar to those of the Offered
Debentures or enter into any swap or other arrangement that transfers to
another, in whole or in part, any of the economic consequences of ownership of
Trust Units or debentures having attributes similar to those of the Offered
Debentures, whether any such transaction is settled by delivery of Trust Units
or debentures having attributes similar to those of the Offered Debentures or
other such securities, in cash or otherwise, or announce any intention to do any
of the foregoing, without the consent of National Bank Financial Inc., on behalf
of the Underwriters, such consent not to be unreasonably withheld (provided that
the foregoing will not restrict the Trust from granting rights pursuant to the
Trust's Unit Incentive Plan or the Trust's Unit Award Incentive Plan or issuing
Trust Units pursuant to (a) the exercise of rights to purchase Trust Units
outstanding under the Unit Incentive Plan or the Trust's Unit Award Incentive
Plan, (b) the conversion or redemption of any of the 8% Debentures, the 9%
Debentures or the Offered Debentures, (c) the payment of interest on the 8%
Debentures, the 9% Debentures or the Offered Debentures, (d) pursuant to the
Trust's DRIP Plan, (e) an acquisition, merger, consolidation or amalgamation or
the issuance of Trust Units upon the exercise of currently existing rights or
instruments, or (f) pursuant to the terms of the Harvest Exchangeable Shares.

16.      Notices

         Any notice or other communication to be given hereunder shall, in the
case of notice to be given to the Trust or Harvest be addressed to Harvest, c/o
Mr. Jacob Roorda, President, at the above address, Fax No. (403) 265-3490 with a
copy to:

         Burnet, Duckworth & Palmer LLP
         1400, 350 - 7th Avenue S.W.
         Calgary, Alberta T2P 3N9
         Attention: Keith Greenfield Fax No.: (403) 260-0337



and, in the case of notice to be given to the Underwriters, be addressed to:

National Bank Financial Inc.
2802, 450 - 1st Street S.W.
Calgary, Alberta T2P 5H1
Attention: L. Trevor Anderson Fax No.: (403) 265-0543

TD Securities Inc.
800, 324 - 8th Avenue S.W.
Calgary, Alberta T2P 2Z2
Attention: Alec Clark Fax No.: (403) 292-2776

CIBC World Markets Inc.
900, 855 - 2nd Street S.W.
Calgary, Alberta T2P 4J7
Attention: T. Timothy Kitchen Fax No.: (403) 260-0524

Scotia Capital Inc.
2000, 700 - 2nd Street S.W.
Calgary, Alberta T2P 2N7
Attention: Mark Herman Fax No.: (403) 298-4099
Canaccord Capital Corporation
Suite 2200, 450 -1st Street S.W.
Calgary, AB T2P 5P8
Attention: Karl B. Staddon Fax No.: (403) 508-3866

GMP Securities Ltd.
Suite 1600, 500 - 4th Ave. S.W.
Calgary, Alberta T2P 2V6
Attention: Sandy Edmonstone Fax No.: (403) 543-3583

FirstEnergy Capital Corp.
1600, 333-7th Avenue S.W.
Calgary, Alberta T2P 2Z1
Attention: Nicholas J. Johnson Fax No.: (403) 262-0688

Tristone Capital Inc.
1800, 335 - 8th Avenue S.W.
Calgary, AB T2P 1C9
Attention: R. Bradley Hurtubise  Fax No.: (403) 539-4365

Haywood Securities Inc.
Suite 301, 808 -1st Street S.W.
Calgary, AB T2P 1M9
Attention: David McGorman Fax No.: (403) 509-1991



Raymond James Ltd.
Suite 2500, 707 - 8th Avenue SW
Calgary, Alberta T2P 1H5
Attention: Jason Holtby Fax No.: (403) 509-0535

and a copy to:

Blake, Cassels & Graydon LLP
3500, 855 - 2nd Street S.W.
Calgary, Alberta T2P 4J8
Attention: Scott R. Cochlan Fax No.: (403) 260-9700

or to such other address as the party may designate by notice given to the
other. Each communication shall be personally delivered to the addressee or sent
by facsimile transmission to the addressee, and:

         (a)      a communication which is personally delivered shall, if
                  delivered before 4:00 p.m. (local time at the place of
                  delivery) on a Business Day, be deemed to be given and
                  received on that day and, in any other case be deemed to be
                  given and received on the first Business Day following the day
                  on which it is delivered; and

         (b)      a communication which is sent by facsimile transmission shall,
                  if sent on a Business Day before 4:00 p.m. (local time at the
                  place of receipt), be deemed to be given and received on that
                  day and, in any other case, be deemed to be given and received
                  on the first Business Day following the day on which it is
                  sent.


17.      Conditions

         All terms, covenants and conditions of this agreement to be performed
by the Trust and Harvest, or either of them, shall be construed as conditions,
and any breach or failure to comply with any material terms and conditions which
are for the benefit of the Underwriters shall entitle the Underwriters to
terminate their obligations to purchase the Offered Securities, by written
notice to that effect given to the Trust prior to the Closing Time. The
Underwriters may waive in whole or in part any breach of, default under or
non-compliance with any representation, warranty, term or condition hereof, or
extend the time for compliance therewith, without prejudice to any of their
rights in respect of any other representation, warranty, term or condition
hereof or any other breach of, default under or non-compliance with any other
representation, warranty, term or condition hereof, provided that any such
waiver or extension shall be binding on the Underwriters only if the same is in
writing.

18.      Survival of Representations and Warranties

         All representations, warranties, terms and conditions herein
(including, without limitation, those contained in paragraph 8) or contained in
certificates or documents submitted pursuant to or in connection with the
transactions contemplated herein shall survive the payment by the Underwriters
for the Offered Securities, the termination of this agreement and the
distribution of the Offered



Securities pursuant to the Prospectus and shall continue in full force and
effect for the benefit of the Underwriters regardless of any investigation by or
on behalf of the Underwriters with respect thereto.

19.      Several Liability of Underwriters

         The Underwriters' rights and obligations under this agreement are
several and not joint and several including, without limitation, that:

         (a)      each of the Underwriters shall be obligated to purchase only
                  the percentage of the total number of Offered Securities set
                  forth opposite their names set forth in this paragraph 19; and

         (b)      if at the Closing Time any one or more of the Underwriters
                  shall fail or refuse to purchase its respective percentage set
                  forth below of the aggregate number of the Offered Securities
                  (other than in accordance with section 11) and the number of
                  such Offered Securities which such defaulting Underwriter or
                  Underwriters agreed but failed or refused to purchase is not
                  more than 7% of the aggregate number of Offered Securities to
                  be purchased on such date, the non-defaulting Underwriters
                  shall be obligated severally, in the proportions that the
                  respective percentage set forth below opposite the names of
                  all such non-defaulting Underwriters, to purchase the Offered
                  Securities which such defaulting Underwriter or Underwriters
                  agreed but failed or refused to purchase at such time; and

         (c)      if any one or more of the Underwriters shall not purchase its
                  applicable percentage of the Offered Securities at the Closing
                  Time and the number of such securities which such defaulting
                  Underwriters or Underwriters agreed but failed or refused to
                  purchase is more than 7% of the aggregate number Offered
                  Securities to be purchased at such time, then the other
                  Underwriters shall have the right, but shall not be obligated,
                  to purchase all of the percentage of Offered Securities which
                  would otherwise have been purchased by such one or more of the
                  Underwriters; the Underwriters exercising such right shall
                  purchase such Offered Securities pro rata to their respective
                  percentages aforesaid or in such other proportions as they may
                  otherwise agree. In the event such right is not exercised, the
                  Underwriters which are not in default shall be entitled by
                  written notice to the Trust to terminate this agreement
                  without liability.

         The applicable percentage of the total number Offered Securities which
each of the Underwriters shall be separately obligated to purchase is as
follows:


                  National Bank Financial Inc.              33.0%
                       TD Securities Inc.                   24.0%
                     CIBC World Markets Inc.                15.0%
                       Scotia Capital Inc.                  10.0%
                  Canaccord Capital Corporation             5.0%
                       GMP Securities Inc.                  5.0%
                    FirstEnergy Capital Corp.               3.0%
                      Tristone Capital Inc.                 3.0%



                     Haywood Securities Inc.                1.0%
                       Raymond James Ltd.                   1.0%

         Nothing in this agreement shall obligate the Trust to sell the
Underwriters less than all of the Offered Receipts and Offered Debentures or
shall relieve any Underwriter in default from liability to the Trust, Harvest or
any non-defaulting Underwriter in respect of the defaulting Underwriter's
default hereunder. In the event of a termination by the Trust or Harvest of
their obligations under this agreement there shall be no further liability on
the part of the Trust or Harvest to the Underwriters except in respect of any
liability which may have arisen or may thereafter arise under paragraphs 9, 10
and 11.

20.      Authority to Bind Underwriters

         The Trust and Harvest shall be entitled to and shall act on any notice,
waiver, extension or communication given by or on behalf of the Underwriters by
National Bank Financial Inc., which shall represent the Underwriters and which
shall have the authority to bind the Underwriters in respect of all matters
hereunder, except in respect of any settlement under paragraph 9 or 10, any
matter referred to in paragraph 12 or any agreement under paragraph 19. While
not affecting the foregoing, National Bank Financial Inc. shall consult with the
other Underwriters with respect to any such notice, waiver, extension or other
communication.

21.       Underwriters Covenants

Each of the Underwriters covenants and agrees with the Trust that it will:

         (a)      offer the Offered Securities for sale to the public in the
                  Qualifying Provinces and may, subject to the terms of this
                  agreement, offer them for sale in the United States in the
                  manner contemplated by Schedule "A" attached hereto;

         (b)      conduct activities in connection with the proposed offer and
                  sale of the Offered Securities in compliance with all the
                  Applicable Securities Laws and cause a similar covenant to be
                  contained in any agreement entered into with any Selling
                  Dealer Group established in connection with the distribution
                  of the Offered Securities;

         (c)      use all reasonable efforts to complete the distribution of
                  Offered Securities as soon as possible;

         (d)      not solicit subscriptions for the Offered Securities, trade in
                  Offered Securities or otherwise do any act in furtherance of a
                  trade of Offered Securities in any jurisdictions outside of
                  the Qualifying Provinces, except as contemplated in Schedule
                  "A" attached hereto or in such other jurisdictions outside of
                  Canada and the United States provided that such sales are made
                  in accordance with the applicable securities laws of such
                  jurisdictions and not engage in the Directed Selling Efforts
                  as described in Schedule "A";

         (e)      as soon as reasonably practicable after the Closing Date
                  provide the Trust with a break down of the number of Offered
                  Securities sold in each of the Qualifying Provinces and, upon
                  completion of the distribution of the Offered Securities,
                  provide to the Trust



                  and to the Securities Commissions notice to that effect, if
                  required by Applicable Securities Laws.

         No Underwriter will be liable to the Trust under this paragraph 20 with
respect to a default by any of the other Underwriters but will be liable to the
Trust only for its own default.

22.      Severance

         If one or more of the provisions contained herein shall, for any
reason, be held to be invalid, illegal or unenforceable in any respect, such
invalidity, illegality or unenforceability shall not affect any other provision
of this agreement, but this agreement shall be construed as if such invalid,
illegal or unenforceable provision or provisions had never been contained
herein.

23.      Relationship Between the Trust, Harvest and the Underwriters

         The Trust and Harvest: (i) acknowledge and agree that the Underwriters
have certain statutory obligations as registrants under the Applicable
Securities Laws and have fiduciary relationships with their clients; (ii)
acknowledge and agree that the Underwriters are neither the agents of the Trust
or Harvest nor otherwise fiduciaries of the Trust or Harvest; and (iii) consent
to the Underwriters acting hereunder while continuing to act for their clients.
To the extent that the Underwriters' statutory obligations as registrants under
the Applicable Securities Laws or fiduciary relationships with their clients
conflicts with their obligations hereunder the Underwriters shall be entitled to
fulfil their statutory obligations as registrants under the Applicable
Securities Laws and their duties to their clients. Nothing in this agreement
shall be interpreted to prevent the Underwriters from fulfilling their statutory
obligations as registrants under the Applicable Securities Laws or to act as a
fiduciary of their clients.

24.      Stabilization

         In connection with the distribution of the Offered Securities, the
Underwriters may over-allot or effect transactions which stabilize or maintain
the market price of the Offered Receipts, Offered Debentures and Trust Units at
levels other than those which might otherwise prevail in the open market, but in
each case only as permitted by applicable law. Such stabilizing transactions, if
any, may be discontinued at any time.

25.      Governing Law

         This agreement shall be governed by and construed in accordance with
the laws of the Province of Alberta and the laws of Canada applicable therein.
Each of the Trust, Harvest and the Underwriters hereby attorn to the
non-exclusive jurisdiction of the courts of the Province of Alberta.

26.      Time of the Essence

         Time shall be of the essence of this agreement.

27.      Counterpart Execution

         This agreement may be executed in one or more counterparts each of
which so executed shall



constitute an original and all of which together shall constitute one and the
same agreement. Delivery of counterparts may be effected by facsimile
transmission.

28.      Contractual Obligations of Trust

         The parties hereto acknowledge that the obligations of the Trust
hereunder shall not be personally binding upon the Trustee, or any of the
unitholders of the Trust and that any recourse against the Trust, the Trustee or
any unitholder in any manner in respect of any indebtedness, obligation or
liability of the Trust arising hereunder or arising in connection herewith or
from the matters to which this agreement relates, if any, including without
limitation claims based on negligence or otherwise tortious behaviour, shall be
limited to, and satisfied only out of, the Trust Fund, as defined in the Trust
Indenture, as amended or restated from time to time.

29.      Further Assurances

         Each party to this agreement covenants agrees that from time to time,
it will, at the request of the requesting party, execute and deliver all such
documents and do all such other acts and things as any party hereto, acting
reasonably, may from time to time request be executed or done in order to better
evidence or perfect or effectuate any provision of this agreement or of any
agreement or other document executed pursuant to this agreement or any of the
respective obligations intended to be created hereby or thereby.

30.      Use of Proceeds

         Each of Harvest and the Trust hereby covenant and agree to use the net
proceeds of the sale of the Offered Securities hereunder in accordance with the
disclosure in the Prospectus.

31.      Distributions

         The Trust agrees that it shall not prior to the Closing Date declare or
pay or establish a record date for any distributions to Unitholders of the Trust
prior to the Closing Date, other than the regular monthly distribution of $0.25
per Trust Unit (or such greater amount determined by the Board of Directors of
Harvest) which is payable on August 15, 2005 to Unitholders of record on July
29, 2005 and if the Closing Date is extended to August 31, 2005, the anticipated
regular monthly distribution of $0.25 per Unit (or such greater amount
determined by the Board of Directors of Harvest) which will be payable on or
about September 15, 2005 to Unitholders of record on August 25, 2005.

32.      U.S. Offers

         (a)      The Underwriters make the representations, warranties and
                  covenants applicable to them in Schedule "A" hereto and agree,
                  on behalf of themselves and their United States affiliates,
                  for the benefit of the Trust and Harvest, to comply with the
                  U.S. selling restrictions imposed by the laws of the United
                  States and set forth in Schedule "A" hereto, which forms part
                  of this agreement. Notwithstanding the foregoing provisions of
                  this paragraph, an Underwriter will not be liable to the Trust
                  under this paragraph or Schedule "A" with respect to a
                  violation by another Underwriter of the provisions of this
                  paragraph or Schedule "A" if the former Underwriter is not
                  itself also in violation.



         (b)      The Trust makes the representations, warranties and covenants
                  applicable to it in Schedule "A" hereto.


33.      Entire Agreement

         It is understood that the terms and conditions of this agreement
supersede any previous verbal or written agreement between the Underwriters and
the Trust or Harvest.



         If the foregoing is in accordance with your understanding and is agreed
to by you, please confirm your acceptance by signing the enclosed copies of this
letter at the place indicated and by returning the same to National Bank
Financial Inc.


NATIONAL BANK FINANCIAL INC.
By: "L. TREVOR ANDERSON"


CIBC WORLD MARKETS INC.
By: "T. TIMOTHY KITCHEN"


CANACCORD CAPITAL CORPORATION
By: "KARL B. STADDON"


TD SECURITIES INC.
By: ALEC W.G. CLARK"


SCOTIA CAPITAL INC.
By: "MARK HERMAN"


GMP SECURITIES LTD.
By: "SANDY L. EDMONSTONE"


TRISTONE CAPITAL INC.
By: "R. BRADLEY HURTUBISE"


RAYMOND JAMES LTD.
By: "JASON HOLTBY"




FIRSTENERGY CAPITAL CORP.
By: "NICHOLAS J. JOHNSON"


HAYWOOD SECURITIES INC.
By: "DAVID G. MCGORMAN"



ACCEPTED AND AGREED to as of the 11th day of July, 2005.


HARVEST ENERGY TRUST, by its attorney Harvest Operations Corp.
By: "DAVID J. RAIN"


HARVEST OPERATIONS CORP.
By: "DAVID J. RAIN"








                                  SCHEDULE "A"


             TERMS AND CONDITIONS FOR UNITED STATES OFFERS AND SALES

         THIS IS SCHEDULE "A" TO THE UNDERWRITING AGREEMENT AMONG NATIONAL BANK
         FINANCIAL INC., TD SECURITIES INC., CIBC WORLD MARKETS INC., SCOTIA
         CAPITAL INC., CANACCORD CAPITAL CORPORATION, GMP SECURITIES LTD.,
         FIRSTENERGY CAPITAL CORP., TRISTONE CAPITAL INC., HAYWOOD SECURITIES
         INC., RAYMOND JAMES LTD.., HARVEST ENERGY TRUST AND HARVEST OPERATIONS
         CORP. MADE AS OF JULY 11, 2005.

         As used in this Schedule "A", capitalized terms used herein and not
defined herein shall have the meanings ascribed thereto in the underwriting
agreement to which this Schedule is annexed and the following terms shall have
the meanings indicated:

         "Directed Selling Efforts" means directed selling efforts as that term
         is defined in Regulation S. Without limiting the foregoing, but for
         greater clarity in this Schedule, it means, subject to the exclusions
         from the definition of directed selling efforts contained in Regulation
         S, any activity undertaken for the purpose of, or that could reasonably
         be expected to have the effect of, conditioning the market in the
         United States for any of the Offered Securities and includes the
         placement of any advertisement in a publication with a general
         circulation in the United States that refers to the offering of the
         Offered Securities;

         "Institutional Accredited Investors" means institutional "accredited
         investors" as such term is defined in Rule 501(a)(1), (2), (3) or (7)
         of the U.S. Securities Act;

         "Qualified Institutional Buyer" means a qualified institutional buyer
         as that term is defined in Rule 144A;

         "Regulation D" means Regulation D adopted by the SEC under the U.S.
         Securities Act;

         "Regulation S" means Regulation S adopted by the SEC under the U.S.
         Securities Act;

         "Rule 144A" means Rule 144A adopted by the SEC under the U.S.
         Securities Act;

         "SEC" means the United States Securities and Exchange Commission;

         "Substantial U.S. Market Interest" means substantial U.S. market
         interest as that term is defined in Regulation S;

         "U.S. Exchange Act" means the United States Securities Exchange Act of
         1934, as amended;

         "U.S. Person" means a U.S. person as that term is defined in Regulation
         S; "U.S. Securities Act" means the United States Securities Act of
         1933, as amended; and

         "United States" means the United States of America, its territories and
         possessions, any state of the United States, and the District of
         Columbia.

         All other capitalized terms used but not otherwise defined in this
Schedule "A" shall have the meanings assigned to them in the Agreement to which
the Schedule "A" is attached.



REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE UNDERWRITERS

         Each Underwriter acknowledges that the Offered Securities have not been
and will not be registered under the U.S. Securities Act and may be offered and
sold only in transactions exempt from or not subject to the registration
requirements of the U.S. Securities Act. Accordingly, neither the Underwriter
nor any of its affiliates, nor any person acting on their behalf, has made or
will make any Directed Selling Efforts in the United States with respect to the
Offered Securities or the Trust Units issuable pursuant to the Offered Receipts
and the Trust Units issuable upon conversion or redemption of the Offered
Debentures.

         Each Underwriter represents and agrees to and with the Trust that:

1        It acknowledges that the Offered Securities, the Trust Units issuable
         pursuant to the Offered Receipts and the Trust Units issuable upon
         conversion or redemption of the Offered Debentures have not been and
         will not be registered under the U.S. Securities Act and may not be
         offered or sold within the United States except pursuant to an
         exemption from the registration requirements of the U.S. Securities
         Act. It has not offered and sold, and will not offer and sell, any
         Offered Securities forming part of its allotment except (a) in an
         offshore transaction in accordance with Rule 903 of Regulation S or (b)
         in the United States in accordance with a private placement exemption
         from registration as provided in paragraphs 3 through 8 below.

2        It has not entered and will not enter into any contractual arrangement
         with respect to the distribution of the Offered Securities, except with
         its affiliates, any selling group members or with the prior written
         consent of the Trust. It shall require each of its U.S. broker-dealer
         affiliates and each selling group member to agree, for the benefit of
         the Trust to comply with, and shall use its best efforts to ensure that
         each of its U.S. broker-dealer affiliates and each selling group member
         complies with, the same provisions of this Schedule as apply to such
         Underwriter as if such provisions applied to such U.S. broker-dealer
         affiliate and selling group member.

3        All offers and sales of Offered Securities in the United States shall
         be made through the U.S. registered broker-dealer affiliate of the
         applicable underwriter in compliance with all applicable U.S.
         broker-dealer requirements. Such broker-dealer affiliate is a Qualified
         Institutional Buyer, is a duly registered broker-dealer with the SEC,
         and is a member in good standing with the National Association of
         Securities Dealers, Inc.

4        Offers and sales of Offered Securities in the United States by the
         Underwriters or their U.S. registered broker-dealer affiliate shall not
         be made by any form of general solicitation or general advertising (as
         those terms are used in Regulation D) or in any manner involving a
         public offering within the meaning of Section 4(2) of the U.S.
         Securities Act.

5        Offers to sell and solicitations of offers to buy the Offered
         Securities shall be made to a limited number of Institutional
         Accredited Investors and in compliance with applicable state securities
         laws of the United States. Offers to sell and solicitations of offers
         to buy the Offered Securities by any Underwriter or its U.S. registered
         broker-dealer affiliate shall also be made only to persons that in
         purchasing such Offered Securities will be deemed to have represented
         and agreed as provided in paragraphs 7(A) through (G) below (to the
         extent such representations are applicable to the purchaser concerned).



6        All purchasers of the Offered Securities in the United States shall be
         informed by an Underwriter, or its U.S. registered broker-dealer
         affiliate, that the Offered Securities have not been and will not be
         registered under the U.S. Securities Act and are being offered and sold
         to such purchasers in reliance on an exemption from the registration
         requirements of the U.S. Securities Act.

7        Each offeree in the United States has been or shall be provided by the
         Underwriter through its U.S. registered broker-dealer affiliate, with a
         U.S. placement memorandum (the "U.S. Memorandum") including the
         Preliminary Prospectus and/or the Prospectus, as applicable, and each
         purchaser will have received at or prior to the time of purchase of any
         Offered Securities the U.S. Memorandum including the Prospectus. The
         U.S. Memorandum shall set forth the following:

         Each U.S. purchaser will, by its purchase of such Subscription Receipts
         or Debentures, as applicable, be required to represent and agree for
         the benefit of the Trust, the Underwriters and the U.S. Affiliates as
         follows:

         (A)      it is authorized to consummate the purchase of the
                  Subscription Receipts and Debentures, as applicable;

         (B)      it is an Institutional Accredited Investor and is acquiring
                  such Subscription Receipts and Debentures, as applicable, for
                  its own account or for one or more investor accounts for which
                  it is exercising sole investment discretion and each such
                  investor is an Institutional Accredited Investor;

         (C)      it has received a copy of the Final Short Form Prospectus
                  dated _________, 2005, together with a United States covering
                  memorandum relating to the offering in the United States (all
                  such documents, the "Offering Documents") and it has been
                  afforded the opportunity (i) to ask such questions as we have
                  deemed necessary of, and to receive answers from,
                  representatives of the Trust concerning the terms and
                  conditions of the offering of the Securities and (ii) to
                  obtain such additional information which the Trust possesses
                  or can acquire without unreasonable effort or expense that is
                  necessary to verify the accuracy and completeness of the
                  information contained in the Offering Documents and that it
                  has considered necessary in connection with our decision to
                  invest in the securities;

         (D)      it understands and acknowledges that the Subscription
                  Receipts, Debentures and Trust Units issuable pursuant thereto
                  or upon conversion thereof, as applicable, have not been and
                  will not be registered under the U.S. Securities Act or the
                  securities laws of any state of the United States, and are
                  therefore "restricted securities" within the meaning of the
                  Rule 144, and that if in the future it shall decide to resell,
                  pledge or otherwise transfer such Securities, the same may be
                  resold, pledged or otherwise transferred only (A) to the
                  Trust, (B) in the United States, in accordance with Rule 144A
                  to a person it reasonably believes is a "Qualified
                  Institutional Buyer" that purchases for its own account or for
                  the account of a Qualified Institutional Buyer and to whom
                  notice is given that the offer, sale or transfer is being made
                  in reliance on Rule 144A, and in compliance with any
                  applicable state securities laws of the United States, (C)
                  outside the United States, in accordance with Rule 904 of
                  Regulation S and in compliance with applicable local laws and
                  regulations, (D) in a transaction



                  exempt from registration under the U.S. Securities Act
                  pursuant to Rule 144 and in compliance with any applicable
                  state securities laws of the United States, or (E) in a
                  transaction that does not require registration under the U.S.
                  Securities Act or any applicable United States state
                  securities laws, and in the case of subparagraph (D) or (E),
                  it has furnished to the Trust an opinion of counsel of
                  recognized standing reasonably satisfactory to the Trust to
                  that effect;

         (E)      it understands that all Subscription Receipts, Debentures and
                  Trust Units issuable pursuant thereto or upon conversion
                  thereof, as applicable, sold in the United States as part of
                  this offering will bear a legend to the following effect:

                  THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED
                  UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED
                  (THE "SECURITIES ACT") OR STATE SECURITIES LAWS. THE HOLDER
                  HEREOF, BY PURCHASING SUCH SECURITIES, AGREES FOR THE BENEFIT
                  OF HARVEST ENERGY TRUST THAT SUCH SECURITIES MAY BE OFFERED,
                  SOLD OR OTHERWISE TRANSFERRED ONLY (A) TO HARVEST ENERGY
                  TRUST, (B) OUTSIDE THE UNITED STATES IN ACCORDANCE WITH RULE
                  904 OF REGULATION S UNDER THE SECURITIES ACT, (C) INSIDE THE
                  UNITED STATES IN ACCORDANCE WITH RULE 144A UNDER THE
                  SECURITIES ACT, (D) PURSUANT TO THE EXEMPTION FROM
                  REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144
                  THEREUNDER, OR (E) PURSUANT TO ANOTHER EXEMPTION FROM
                  REGISTRATION AFTER PROVIDING A LEGAL OPINION OR OTHER EVIDENCE
                  SATISFACTORY TO HARVEST ENERGY TRUST.
                  IF THESE SECURITIES ARE BEING SOLD IN COMPLIANCE WITH RULE 904
                  OF REGULATION S UNDER THE SECURITIES ACT AT A TIME WHEN
                  HARVEST ENERGY TRUST IS A "FOREIGN ISSUER" AS DEFINED IN
                  REGULATION S, A NEW CERTIFICATE BEARING NO LEGEND MAY BE
                  OBTAINED FROM VALIANT TRUST COMPANY UPON DELIVERY OF THIS
                  CERTIFICATE AND A DULY EXECUTED DECLARATION, IN A FORM
                  SATISFACTORY TO VALIANT TRUST COMPANY AND HARVEST ENERGY
                  TRUST, TO THE EFFECT THAT THE SALE OF THE SECURITIES
                  REPRESENTED HEREBY IS BEING MADE IN COMPLIANCE WITH RULE 904
                  OF REGULATION S UNDER THE SECURITIES ACT.

                  If the Subscription Receipts, Debentures or Trust Units
                  issuable pursuant thereto or upon conversion thereof, as
                  applicable are being sold in compliance with the requirements
                  of Rule 904 of Regulation S at a time when the Trust is a
                  "foreign issuer" as defined in Regulation S, the legend may be
                  removed by providing a declaration to Valiant Trust Company
                  substantially in the form of Exhibit II hereto, or as the
                  Trust may prescribe from time to time.

                  If the Subscription Receipts, Debentures or Trust Units
                  issuable pursuant thereto or upon conversion thereof, as
                  applicable are being sold under Rule 144 of the U.S.
                  Securities Act, the legend may be removed by delivery to
                  Valiant Trust Company of



                  an opinion of counsel of recognized standing and reasonably
                  satisfactory to the Trust, to the effect that such legend is
                  no longer required under the U.S. Securities Act or state
                  securities laws;

         (F)      it understands and acknowledges that it is making the
                  representations and warranties and agreements contained herein
                  with the intent that they may be relied upon by the Trust, the
                  Underwriters and the U.S. Affiliates in determining its
                  eligibility or (if applicable) the eligibility of others on
                  whose behalf it is contracting hereunder to purchase the
                  Subscription Receipts and Debentures; and
         (G)      it understands that it is required to sign and deliver a
                  purchaser's letter substantially in the form of Exhibit I
                  hereto in which it will agree to certain restrictions on the
                  transfer of the Subscription Receipts, Debentures or Trust
                  Units issuable pursuant thereto or upon conversion thereof, as
                  applicable.

8.       At closing, the Underwriters, together with their U.S. Affiliates
         selling Offered Securities in the United States, will provide a
         certificate, substantially in the form of Exhibit III to this Schedule
         relating to the manner of the offer and sale of the Offered Securities
         in the United States.

REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE TRUST

         The Trust represents, warrants, covenants and agrees that:

9.       (a) The Trust is a "foreign issuer" within the meaning of Regulation S
         and reasonably believes that there is no Substantial U.S. Market
         Interest in the Offered Securities or Trust Units issuable pursuant
         thereto or upon conversion thereof; (b) the Trust is not now and as a
         result of the sale of Offered Securities contemplated hereby will not
         be required to be registered as an "investment company" under the
         United States Investment Company Act of 1940, as amended; and (c) none
         of the Trust any of its affiliates, or any person acting on their
         behalf has made or will make any Directed Selling Efforts in the United
         States, or has engaged or will engage in any form of general
         solicitation or general advertising (as those terms are used in
         Regulation D) in connection with the offer or sale of the Offered
         Securities in the United States.




                                                                       Exhibit I



                         FORM OF U.S. PURCHASER'S LETTER

Dear Sirs:

         In connection with our proposed purchase of Subscription Receipts
("SUBSCRIPTION RECEIPTS") representing the right to receive Trust Units ("TRUST
UNITS") of Harvest Energy Trust or 6.50% Convertible Subordinated Debentures
(the "Debentures") of Harvest Energy Trust (the "Trust"), we confirm and agree
as follows:

         (a) we are authorized to consummate the purchase of the Subscription
Receipts and the Debentures, as applicable;

         (b) we understand that the Subscription Receipts, Debentures and Trust
Units issuable pursuant thereto or upon conversion or redemption thereof, as
applicable, have not been and will not be registered under the United States
Securities Act of 1933, as amended (the "Securities Act"), and that the sale
contemplated hereby is being made to Institutional Accredited Investors (as
defined in paragraph (c) below) in reliance on a private placement exemption
from registration under the Securities Act;

         (c) we are an institutional "accredited investor" within the meaning of
Rule 501(a)(1), (2), (3) or (7) under the Securities Act (an "Institutional
Accredited Investor") and are acquiring the Securities for our own account or
for one or more investor accounts for which we are exercising sole investment
discretion and each such investor account is an Institutional Accredited
Investor;

         (d) we agree that if we decide to offer, sell or otherwise transfer or
pledge all or any part of the Subscription Receipts, Debentures and Trust Units
issuable pursuant thereto or upon conversion or redemption thereof, as
applicable, we will not offer, sell or otherwise transfer or pledge any of such
securities (other than pursuant to an effective registration statement under the
Securities Act), directly or indirectly unless:

                  (i)      the sale is to the Trust; or

                  (ii)     the sale is made in accordance with Rule 144A under
                           the Securities Act to a person it reasonably believes
                           is a "qualified institutional buyer" (as such term is
                           defined in Rule 144A under the Securities Act) that
                           purchases for its own account or for the account of a
                           qualified institutional buyer and to whom notice is
                           given that the offer, sale or transfer is being made
                           in reliance on Rule 144A, and in compliance with
                           applicable state securities laws of the United
                           States; or

                  (iii)    the sale is made outside the United States in
                           accordance with the requirements of Rule 904 of
                           Regulation S under the Securities Act and in
                           compliance with



                           applicable local laws and regulations; or

                  (iv)     the sale is made pursuant to the exemption from
                           registration under the Securities Act provided by
                           Rule 144 thereunder, and in compliance with any
                           applicable state securities laws of the United
                           States; or

                  (v)      such securities are sold in a transaction that does
                           not require registration under the Securities Act or
                           any applicable United States state laws and
                           regulations governing the offer and sale of
                           securities;

                  and in the case of subparagraph (iv) or (v), we have furnished
                  to the Trust an opinion of counsel, of recognized standing
                  reasonably satisfactory to the Trust, to that effect;

         (e) we understand and acknowledge that the Subscription Receipts,
Debentures and Trust Units issuable pursuant thereto or upon conversion thereof,
as applicable, are "restricted securities" as defined in Rule 144 under the
Securities Act, and upon the original issuance thereof, and until such time as
the same is no longer required under applicable requirements of the Securities
Act or state securities laws, the certificates representing the Securities, and
all certificates issued in exchange therefor or in substitution thereof, shall
bear on the face of such certificates the following legend:

         THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
         UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
         ACT"), OR STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING SUCH
         SECURITIES, AGREES FOR THE BENEFIT OF HARVEST ENERGY TRUST THAT SUCH
         SECURITIES MAY BE OFFERED, SOLD OR OTHERWISE TRANSFERRED ONLY (A) TO
         HARVEST ENERGY TRUST, (B) OUTSIDE THE UNITED STATES IN ACCORDANCE WITH
         RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, (C) INSIDE THE
         UNITED STATES IN ACCORDANCE WITH RULE 144A UNDER THE SECURITIES ACT,
         (D) PURSUANT TO THE EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
         ACT PROVIDED BY RULE 144 THEREUNDER, OR (E) PURSUANT TO ANOTHER
         EXEMPTION FROM REGISTRATION AFTER PROVIDING A LEGAL OPINION OR OTHER
         EVIDENCE SATISFACTORY TO HARVEST ENERGY TRUST.

         IF THESE SECURITIES ARE BEING SOLD IN COMPLIANCE WITH RULE 904 OF
         REGULATION S UNDER THE SECURITIES ACT AT A TIME WHEN HARVEST ENERGY
         TRUST IS A "FOREIGN ISSUER" AS DEFINED IN REGULATION S, A NEW
         CERTIFICATE BEARING NO LEGEND MAY BE OBTAINED FROM VALIANT TRUST
         COMPANY UPON DELIVERY OF THIS CERTIFICATE AND A DULY EXECUTED
         DECLARATION, IN A FORM SATISFACTORY TO VALIANT TRUST COMPANY AND
         HARVEST ENERGY TRUST, TO THE EFFECT THAT THE SALE OF THE SECURITIES
         REPRESENTED HEREBY IS BEING MADE IN COMPLIANCE WITH RULE 904 OF
         REGULATION S UNDER THE SECURITIES ACT;


         If Securities are being sold in compliance with the requirements of
Rule 904 of Regulation S at a time when the Trust is a "foreign issuer" as
defined in Regulation S, the legend may be removed by providing a declaration to
Valiant Trust Company substantially in the form of Exhibit II to the United
States memorandum referred to in paragraph (f) below (or as the Trust may
prescribe from



time to time);

If any such Securities are being sold pursuant to Rule 144 of the Securities
Act, the legend may be removed by delivery to Valiant Trust Company of an
opinion of counsel, of recognized standing reasonably satisfactory to the Trust,
to the effect that such legend is no longer required under applicable
requirements of the Securities Act or state securities laws;

         (f) we have received a copy of the Final Short Form Prospectus dated
_________, 2005, together with a United States covering memorandum relating to
the offering in the United States (all such documents, the "Offering Documents")
and we have been afforded the opportunity (i) to ask such questions as we have
deemed necessary of, and to receive answers from, representatives of the Trust
concerning the terms and conditions of the offering of the Securities and (ii)
to obtain such additional information which the Trust possesses or can acquire
without unreasonable effort or expense that is necessary to verify the accuracy
and completeness of the information contained in the Offering Documents and that
we have considered necessary in connection with our decision to invest in the
securities;
         (g) we acknowledge that we are not purchasing the Subscription Receipts
and Debentures, as applicable, as a result of any general solicitation or
general advertising, as those terms are used in Regulation D under the
Subscription Receipts and/or Debentures Act including, without limitation,
advertisements, articles, notices and other communications published in any
newspaper, magazine or similar media or broadcast over television or radio or
any seminar or meeting whose attendees have been invited by general solicitation
or general advertising; and
         (h) we understand and acknowledge that the Trust (i) is under no
obligation to be or to remain a "foreign issuer," (ii) may not, at the time we
sell the Subscription Receipts and Debentures and Trust Units, as applicable, or
at any other time, be a "foreign issuer," and (iii) may engage in one or more
transactions which could cause the Trust not to be a "foreign issuer." If the
Trust is not a "foreign issuer" at the time of any sale pursuant to Rule 904 of
Regulation S, the certificate delivered to the buyer may continue to bear the
legend contained in paragraph (e) above.

         We acknowledge that the representations and warranties and agreements
contained herein are made by us with the intent that they may be relied upon by
you, the Underwriters referred to in the Offering Documents and the U.S.
affiliates of the Underwriters, in determining our eligibility or (if
applicable) the eligibility of others on whose behalf we are contracting
hereunder to purchase the Subscription Receipts and/or Debentures. We further
agree that by accepting the Subscription Receipts and/or Debentures we shall be
representing and warranting that the foregoing representations and warranties
are true as at the closing time with the same force and effect as if they had
been made by us at the closing time and that they shall survive the purchase by
us of the Subscription Receipts and/or Debentures and shall continue in full
force and effect notwithstanding any subsequent disposition by us of the
Subscription Receipts and/or Debentures.

         You, the Underwriters and the Underwriters' U.S. affiliates are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceeding or official inquiry with respect
to the matters covered hereby.






Dated:                                                       [NAME OF PURCHASER]

________________________________                ________________________________



                                                By:_____________________________

                                                Name:___________________________

                                                Title: _________________________






                                                                      Exhibit II



                    FORM OF DECLARATION FOR REMOVAL OF LEGEND


TO:      Valiant Trust Company
         as registrar, transfer agent and trustee
         for Subscription Receipts, Debentures and Trust Units


         The undersigned:

         (A)      acknowledges that the sale of the securities of Harvest Energy
Trust (the "Trust") to which this declaration relates is being made in reliance
on Rule 904 of Regulation S ("Regulation S") under the United States Securities
Act of 1933, as amended (the "1933 Act"); and

         (B)      certifies that

                  (1)      it is not an affiliate of the Trust (as defined in
         Rule 405 under the 1933 Act),

                  (2)      the offer of such securities was not made to a person
         in the United States and either (a) at the time the buy order was
         originated, the buyer was outside the United States, or we and any
         person acting on its behalf reasonably believe that the buyer was
         outside the United States, or (b) the transaction was executed on or
         through the facilities of the Toronto Stock Exchange and neither we nor
         any person acting on its behalf knows that the transaction has been
         prearranged with a buyer in the United States,

                  (3)      neither we nor any affiliate of the seller nor any
         person acting on any of our or their behalf has engaged or will engage
         in any "directed selling efforts" (as such term is defined in
         Regulation S) in the United States in connection with the offer and
         sale of such securities,

                  (4)      the sale is bona fide and not for the purpose of
         "washing off" the resale restrictions imposed because the securities
         are "restricted securities" (as such term is defined in Rule 144(a)(3)
         under the 1933 Act),

                  (5)      we do not intend to replace such securities with
         fungible unrestricted securities; and

                  (6)      the contemplated sale is not a transaction, or part
         of a series of transactions which, although in technical compliance
         with Regulation S, is part of a plan or scheme to evade the
         registration provisions of the 1933 Act. Terms used herein have the
         meanings given to them by Regulation S.

Dated: _____________________________________   By:______________________________
                                                    Name:
                                                    Title:





                                                                     Exhibit III



                            UNDERWRITERS' CERTIFICATE


         In connection with the private placement in the United States of
subscription receipts and 6.50% convertible extendible subordinated debentures
(collectively, the "Securities") of Harvest Energy Trust (the "Trust") pursuant
to the Underwriting Agreement dated July 11, 2005 among the Trust, Harvest
Operations Corp. and the Underwriters named therein (the "Underwriting
Agreement"), each of the undersigned does hereby certify as follows:

         (i)      x is a duly registered broker or dealer with the United
                  States Securities and Exchange Commission and is a member of
                  and in good standing with the National Association of
                  Securities Dealers, Inc. On the date hereof, and all offers
                  and sales of the Securities in the United States will be
                  effected by x in accordance with all U.S. broker-dealer
                  requirements;

         (ii)     each offeree was provided with a copy of the U.S. placement
                  memorandum, including the Canadian final prospectus dated x,
                  2005 for the offering of the Securities in the United States,
                  and no other written material has been used by us in
                  connection with the offering of the Securities;

         (iii)    immediately prior to our transmitting such U.S. placement
                  memorandum to such offerees, we had reasonable grounds to
                  believe and did believe that each offeree was an institutional
                  "accredited investor" (an "Institutional Accredited Investor")
                  within the meaning of Rule 501(a)(1), (2), (3) or (7) under
                  the Securities Act of 1933, as amended (the "U.S. Securities
                  Act") and, on the date hereof, we continue to believe that
                  each U.S. person purchasing Securities from us is a
                  Institutional Accredited Investor;

         (iv)     no form of general solicitation or general advertising (as
                  those terms are used in Regulation D under the U.S. Securities
                  Act) was used by us, including advertisements, articles,
                  notices or other communications published in any newspaper,
                  magazine or similar media or broadcast over radio or
                  television, or any seminar or meeting whose attendees had been
                  invited by general solicitation or general advertising, in
                  connection with the offer or sale of the Securities in the
                  United States; and

         (v)      the offering of the Securities in the United States has been
                  conducted by us in accordance with the terms of the
                  Underwriting Agreement.

         Terms used in this certificate have the meanings given to them in the
Underwriting Agreement unless otherwise defined herein.




Dated this __________ day of___________ 2005.

By:                                     By:
    ___________________________________     ___________________________________
       Name:                                     Name:
       Title:                                    Title:

By:                                     By:
    ___________________________________     ___________________________________
       Name:                                     Name:
       Title:                                    Title: