EXHIBIT 1










                         Northern Border Partners, L.P.

                                     287,096
                                  Common Units
                     Representing Limited Partner Interests

                             UNDERWRITING AGREEMENT













                             UNDERWRITING AGREEMENT

                                                              New York, New York
                                                                October 15, 2001
UBS Warburg LLC
299 Park Avenue
New York, New York 10071


Ladies and Gentlemen:

            The unitholders of Northern Border Partners, L.P., a limited
partnership organized under the laws of Delaware (the "Partnership"), named in
Schedule A annexed hereto (the "Selling Unitholders") propose to sell, severally
and jointly, to UBS Warburg LLC (the "Underwriter"), an aggregate of 287,096
Common Units ("Common Units") representing limited partner interests in the
Partnership (the "Units"). The Units are described in the Final Prospectus which
is referred to below.

            The term "Registration Statement" as used in this Agreement shall
mean such registration statement filed on Form S-3 (File No. 333-63566)
(including all financial schedules and exhibits), as amended when it became
effective, or, if such registration statement became effective prior to the
execution of this Agreement, as supplemented or amended prior to the execution
of this Agreement. If it is contemplated, at the time this Agreement is
executed, that a post-effective amendment to such registration statement will be
filed and must be declared effective before the offering of the Units may
commence, the term "Registration Statement" as used in this Agreement means such
registration statement as amended by said post-effective amendment. If it is
contemplated, at the time the Agreement is executed, that a registration
statement will be filed pursuant to Rule 462(b) under the Act (as defined below)
before the offering of the Units may commence, the term "Registration Statement"
as used in this Agreement includes such registration statement. The term "Basic
Prospectus" as used in this Agreement shall mean the prospectus contained in the
Registration Statement at the time that the Registration Statement was declared
effective or in the form in which it has been most recently filed with the
Commission (as defined below) on or prior to the date of this Agreement. "Final
Prospectus" shall mean the prospectus supplement relating to the Units and the
offering thereof that is first filed pursuant to Rule 424(b) after the date and
time this Agreement is executed and delivered by the parties hereto, together
with the Basic Prospectus.

            All references in this Agreement to financial statements and
schedules and other information which is "contained," "included" or "stated" in
the Registration Statement, the Basic Prospectus or the Final Prospectus (or
other references of like import) shall be deemed to mean and include all such
financial statements and schedules and other information which is incorporated
by reference in the Registration Statement, the Basic Prospectus or the Final
Prospectus, as the case may be; any reference in this Agreement to the
Registration Statement, the Basic Prospectus or the Final Prospectus shall be
deemed to refer to and include the documents incorporated by reference therein
pursuant to Item 12 of Form S-3 under the Act, as of the dates of the
Registration Statement, the Basic Prospectus or the Final Prospectus, as the
case may be; and any reference to any amendment or supplement to the
Registration Statement,





the Basic Prospectus or the Final Prospectus shall be deemed to refer to and
include any documents filed after such date under the Securities Exchange Act of
1934, as amended, and the rules and regulations of the Commission thereunder
(collectively, the "Exchange Act") which, upon filing, are incorporated by
reference therein, as required by paragraph (b) of Item 12 of Form S-3. As used
herein, the term "Incorporated Documents" means the documents which at the time
are incorporated by reference in the Registration Statement, the Basic
Prospectus or the Final Prospectus or any amendment or supplement thereto.

            The Partnership, Northern Border Intermediate Limited Partnership, a
Delaware limited partnership (the "Intermediate Partnership"), and the Selling
Unitholders, acting severally and jointly, confirm as follows their agreements
with the Underwriter:

            1. Sale and Purchase. Upon the basis of the warranties and
representations and subject to the terms and conditions herein set forth, the
Selling Unitholders agree, severally and jointly, to sell to the Underwriter the
number of Units set forth opposite such Selling Unitholder's name in Schedule A
attached hereto and the Underwriter agrees to purchase from the Selling
Unitholders, at a purchase price of $38.35 per Common Unit, the Units. It is
understood that the Underwriter proposes to offer the Units for sale to the
public as set forth in the Final Prospectus.

            2. Payment and Delivery. Payment of the purchase price for the Units
shall be made to the respective accounts of the Selling Unitholders by Federal
Funds wire transfer, against delivery of the Units to you for the account of the
Underwriter. Each Selling Unitholder shall provide to the Underwriter individual
wire transfer instructions on or before October 17, 2001. Such payment and
delivery shall be made at 10:00 A.M., New York City time, on October 18, 2001
(unless another time shall be agreed to in writing by you, the Partnership and
the Selling Unitholders). The time at which such payment and delivery of the
Units are actually made is hereinafter sometimes called the time of purchase.

            3. Representations and Warranties.

                  (i) The Partnership and the Intermediate Partnership, jointly
and severally represent and warrant to, and agree with, the Underwriter as set
forth below in this Section 3.

                           (a) The Partnership has prepared and filed, in
         accordance with the provisions of the Securities Act of 1933, as
         amended, and the rules and regulations thereunder (collectively, the
         "Act") with the Securities and Exchange Commission (the "Commission")
         the Registration Statement, including a related Basic Prospectus
         subject to completion relating to the Units, such Registration
         Statement has been declared effective by the Commission, and no stop
         order suspending the effectiveness of the Registration Statement has
         been issued by the Commission. At the time of the filing of such
         Registration Statement, the Partnership met the requirements for use of
         Form S-3 under the Act. The Partnership may have filed one or more
         amendments or supplements thereto, including any preliminary prospectus
         which relates to such Basic Prospectus and has previously been
         furnished to you. The Partnership will next file with the Commission a
         Final Prospectus which relates to such Basic Prospectus and includes
         the


                                      -2-



         Basic Prospectus, in accordance with Rules 430A and 424(b). The
         Partnership has included in such Registration Statement, as amended and
         supplemented on the date that it becomes effective or the issue date of
         the Final Prospectus, as applicable, all information (other than
         information with respect to the Units and the offering thereof
         permitted to be omitted from the Registration Statement when it becomes
         effective pursuant to Rule 430A ("Rule 430A Information")), required by
         the Act to be included in such Registration Statement and the Final
         Prospectus. As filed, such Final Prospectus shall contain all Rule 430A
         Information, together with all other such required information, and,
         except to the extent the Underwriter shall agree in writing to a
         modification, shall be in all substantive respects in the form
         furnished to you prior to the time of execution of this Agreement or,
         to the extent not completed at the time of execution of this Agreement,
         shall contain only such specific additional information and other
         changes as the Partnership has advised you, prior to the time of
         execution of this Agreement, will be included or made therein.

                           (b) The Registration Statement, on the date that it
         became effective, did, and when the Final Prospectus is first filed in
         accordance with Rule 424(b) and at the time of purchase, the Final
         Prospectus (and any supplements thereto) will, comply in all material
         respects with the applicable requirements of the Act and the Exchange
         Act; the Registration Statement, on the date that it became effective
         and as supplemented or amended, at the time this Agreement is executed,
         did not or will not contain any untrue statement of a material fact or
         omit to state any material fact required to be stated therein or
         necessary in order to make the statements therein not misleading; and
         on the date of filing pursuant to Rule 424(b) and at the time of
         purchase, the Final Prospectus (together with any supplement thereto)
         will not, include any untrue statement of a material fact or omit to
         state a material fact necessary in order to make the statements
         therein, in the light of the circumstances under which they were made,
         not misleading; provided, however, that the Partnership makes no
         representations or warranties as to the information contained in or
         omitted from the Registration Statement or the Final Prospectus (or any
         supplement thereto) in reliance upon and in conformity with information
         furnished in writing to the Partnership by the Underwriter or by or on
         behalf of any Selling Unitholder through any Selling Unitholder
         specifically for inclusion in the Registration Statement or the Final
         Prospectus (or any supplement thereto).

                           (c) The only significant subsidiaries (as defined in
         Regulation S-X under the Act) of the Partnership (the "Subsidiaries")
         are the Intermediate Partnership, Northern Border Pipeline Company, a
         Texas general partnership ("Northern Border Pipeline"), Crestone Energy
         Ventures, L.L.C., a Delaware limited liability company ("Crestone"),
         Bear Paw Investments, LLC, a Delaware limited liability company ("Bear
         Paw Investments"), Bear Paw Energy, LLC, a Delaware limited liability
         company ("Bear Paw Energy"), Border Midwestern Company, a Delaware
         corporation ("Border Midwestern"), and Midwestern Gas Transmission
         Company, a Delaware corporation ("Midwestern Gas"). Each Subsidiary was
         duly formed and is validly existing and in good standing under the laws
         of its jurisdiction of formation. Each of the Subsidiaries has, and at
         the time of purchase, will have, full power and authority to conduct
         the activities conducted by it, to own or lease all the assets owned or
         leased by it and to conduct its business as described in the
         Registration Statement and the Final


                                      -3-



         Prospectus. Each of the Subsidiaries is, and at the time of purchase
         will be, duly licensed or qualified to do business and in good standing
         as a foreign entity in all jurisdictions in which the nature of the
         activities conducted by it or the character of the assets owned or
         leased by it makes such licensing or qualification necessary, except
         for such jurisdictions in which the failure so to qualify or register
         would not have a material adverse effect upon such Subsidiary or
         subject such Subsidiary or the Partnership to any material liability or
         disability. All of the outstanding interests of Crestone have been duly
         authorized and validly issued and are fully paid and non-assessable and
         are owned by the Intermediate Partnership free and clear of all liens,
         encumbrances and claims whatsoever. Crestone, directly or indirectly,
         owns (i) all of the membership interests in Crestone Gathering
         Services, L.L.C., Crestone Wind River, L.L.C. and Crestone Powder
         River, L.L.C., (ii) a 49% common membership interest in and preferred
         shares of Bighorn Gas Gathering, L.L.C. ("Bighorn"), (iii) a 33.33%
         membership interest in Fort Union Gas Gathering, L.L.C., a Delaware
         limited liability company ("Fort Union"), and (iv) a 35% membership
         interest in Lost Creek Gathering, L.L.C., a Delaware limited liability
         company ("Lost Creek"), in each case free and clear of any liens,
         claims or encumbrances (except that Crestone's member interests in Fort
         Union and Lost Creek are or will be pledged to the lenders with respect
         to those projects and except for such other liens, encumbrances,
         security interests, equities, charges or claims as are not,
         individually or in the aggregate, material or except as described in
         the Final Prospectus). All of the outstanding shares of capital stock
         of Border Midstream Services, Ltd., an Alberta corporation ("Border
         Midstream"), have been duly authorized and validly issued and are fully
         paid and non-assessable and are owned by the Intermediate Partnership
         free and clear of any liens, claims or encumbrances (except for such
         liens, encumbrances, security interests, equities, charges or claims as
         are not, individually or in the aggregate, material or except as
         described in the Final Prospectus). All of the outstanding interests of
         Bear Paw Investments have been duly authorized and validly issued and
         are fully paid and non-assessable and are owned by the Intermediate
         Partnership free and clear of any liens, claims or encumbrances (except
         for such liens, encumbrances, security interests, equities, charges or
         claims as are not, individually or in the aggregate, material or except
         as described in the Final Prospectus). All of the outstanding interests
         of Bear Paw Energy have been duly authorized and validly issued and are
         fully paid and non-assessable and are owned by Bear Paw Investments
         free and clear of any liens, claims or encumbrances (except for such
         liens, encumbrances, security interests, equities, charges or claims as
         are not, individually or in the aggregate, material or except as
         described in the Final Prospectus). All of the outstanding shares of
         capital stock of Border Midwestern have been duly authorized and
         validly issued and are fully paid and non-assessable and are owned by
         the Intermediate Partnership free and clear of any liens, claims or
         encumbrances (except for such liens, encumbrances, security interests,
         equities, charges or claims as are not, individually or in the
         aggregate, material or except as described in the Final Prospectus).
         All of the outstanding shares of capital stock of Midwestern Gas have
         been duly authorized and validly issued and are fully paid and
         non-assessable and are owned by Border Midwestern free and clear of any
         liens, claims or encumbrances (except for such liens, encumbrances,
         security interests, equities, charges or claims as are not,
         individually or in the aggregate, material or except as described in
         the Final Prospectus). The Intermediate Partnership owns a 70% general
         partner interest in


                                      -4-



         Northern Border Pipeline free and clear of any liens, claims or
         encumbrances (except for such liens, encumbrances, security interests,
         equities, charges or claims as are not, individually or in the
         aggregate, material or except as described in the Final Prospectus).

                           (d) The Partnership has been duly formed and is
         validly existing as a limited partnership under the Delaware Revised
         Uniform Limited Partnership Act (the "Delaware Act"), with all
         necessary partnership power and authority to own or lease the
         properties it owns or leases and to conduct the business it conducts in
         each case in all material respects as described in the Registration
         Statement and the Final Prospectus, and is duly qualified or registered
         as a foreign limited partnership for the transaction of business under
         the laws of each jurisdiction in which the failure so to qualify or
         register would have a material adverse effect upon the Partnership or
         subject the Partnership or the limited partners of the Partnership to
         any material liability or disability.

                           (e) Northern Plains Natural Gas Company, a Delaware
         corporation ("Northern Plains") and wholly owned subsidiary of Enron
         Corp., an Oregon corporation ("Enron"), Pan Border Gas Company, a
         Delaware corporation ("Pan Border") and wholly owned subsidiary of
         Northern Plains, and Northwest Border Pipeline Company, a Delaware
         corporation ("Northwest Border") and wholly owned subsidiary of The
         Williams Companies, Inc., a Delaware corporation ("Williams")
         (collectively, the "General Partners"), are the only general partners
         of the Partnership with general partner interests in the Partnership of
         1.0% in the aggregate; such general partner interests are duly
         authorized by the Agreement of Limited Partnership of the Partnership
         (as it may be amended or restated at the date this Agreement is
         executed, the "Partnership Agreement"), and were validly issued to the
         General Partners and are fully paid (to the extent required under the
         Partnership Agreement).

                           (f) The General Partners are the sole general
         partners of the Intermediate Partnership with general partner interests
         in the Intermediate Partnership of 1.0101% in the aggregate subject to
         the provisions of the Agreement of Limited Partnership of the
         Intermediate Partnership (the "Intermediate Partnership Agreement");
         such general partner interests are duly authorized by the Intermediate
         Partnership Agreement and were validly issued to the General Partners
         and are fully paid (to the extent required under the Intermediate
         Partnership Agreement) (the Intermediate Partnership Agreement and the
         Partnership Agreement are herein collectively referred to as the
         "Partnership Agreements"). Complete and correct copies of the
         certificate of limited partnership for each of the Partnership and the
         Intermediate Partnership and of the Partnership Agreements, and all
         amendments thereto have been delivered to the Underwriter, and no
         changes therein will be made subsequent to the date hereof and prior to
         the time of purchase.

                           (g) The limited partners of the Partnership hold
         limited partner interests in the Partnership aggregating 99.0%, such
         limited partner interests being represented by 41,623,014 Common Units;
         such limited partner interests are the only limited partner interests
         of the Partnership that are issued and outstanding; the limited partner
         interests represented thereby are authorized by the Partnership
         Agreement, were


                                      -5-



         validly issued and are fully paid (to the extent required under the
         Partnership Agreement) and non-assessable (except as described in the
         Partnership Agreement and except as set forth in Section 17-607 of the
         Delaware Act).

                           (h) The Partnership is the sole limited partner of
         the Intermediate Partnership, with a limited partner interest of
         98.9899% (subject to the provisions of the Intermediate Partnership
         Agreement); such limited partner interest is authorized by the
         Intermediate Partnership Agreement, was validly issued in accordance
         with the Intermediate Partnership Agreement and is fully paid and
         non-assessable (except as described in the Intermediate Partnership
         Agreement and except as set forth in Section 17-607 of the Delaware
         Act); the Partnership owns, directly or indirectly, such limited
         partner interest in the Intermediate Partnership free and clear of all
         liens, encumbrances, security interests, equities, charges or claims
         (except for such liens, encumbrances, security interests, equities,
         charges or claims as are not, individually or in the aggregate,
         material or except as described in the Registration Statement or Final
         Prospectus).

                           (i) Except as described in the Final Prospectus or
         contained in the Partnership Agreement and except for (i) rights
         granted pursuant to that certain Exchange Agreement dated May 31, 1997
         among the Intermediate Partnership, the Partnership and the
         stockholders of Williams Technologies, Inc. and (ii) rights granted
         pursuant to that certain Exchange Agreement dated December 29, 1997
         between the Partnership and Central Pacific Resources Partnership,
         there are no preemptive rights or other rights to subscribe for or to
         purchase, nor any restriction upon the voting or transfer of (except in
         the case of restrictions on transfer for securities issued by the
         Partnership in reliance on Section 4(2) of the Act), any limited
         partner interests in the Partnership or the Intermediate Partnership
         pursuant to either of the Partnership Agreements or other governing
         documents or any agreement or other instrument to which the Partnership
         or the Intermediate Partnership is a party or by which either of them
         may be bound. The Common Units conform in all material respects to the
         description of the Common Units contained in the Final Prospectus.
         Except as described above, there are no outstanding options or warrants
         to purchase any Common Units.

                           (j) None of the Partnership or the Subsidiaries has
         sustained since the date of the latest audited financial statements
         incorporated by reference in each of the Registration Statement and the
         Final Prospectus any material loss or interference with its business
         from fire, explosion, flood or other calamity, whether or not covered
         by insurance, or from any labor dispute or court or governmental
         action, order or decree, otherwise than as set forth or contemplated in
         the Final Prospectus; and, since the date as of which information is
         given in the Final Prospectus, there has not been any material adverse
         change in the capitalization or long-term debt of any of the
         Subsidiaries or any material adverse change, or any development
         involving a prospective material adverse change, in or affecting the
         general affairs, management, financial position, or results of
         operations of any of the Subsidiaries, otherwise than as set forth or
         contemplated in the Final Prospectus.

                           (k) The Partnership and the Subsidiaries have good
         and indefeasible title to all real and personal property necessary to
         own and operate their


                                      -6-



         businesses in all material respects as described in the Final
         Prospectus, free and clear of all liens, claims, encumbrances and
         defects except (1) as described in the Final Prospectus and (2) such as
         do not materially interfere with the ownership, operation or benefits
         of ownership of such businesses or materially increase the cost of
         operation or ownership of such businesses, provided that, (a) with
         respect to the gas transmission and gathering pipelines of Northern
         Border Pipeline, Crestone, Bear Paw Energy and Midwestern Gas and
         right-of-way interests related thereto (the "Pipeline Properties") the
         foregoing shall only constitute a representation that, except as
         described in the Final Prospectus, (i) Northern Border Pipeline,
         Crestone, Bear Paw Energy and Midwestern Gas have sufficient title to
         enable them to use such Pipeline Properties in their businesses as they
         have been used in the past and as are proposed to be used in the future
         as described in the Final Prospectus and (ii) any lack of title has not
         had and will not have any material adverse effect on the ability of
         Northern Border Pipeline, Crestone, Bear Paw Energy and Midwestern Gas
         to use such Pipeline Properties as they have been used in the past and
         are proposed to be used in the future as described in the Final
         Prospectus and will not materially increase the cost of such use, and
         (b) with respect to any real property, buildings and equipment held
         under lease by Northern Border Pipeline, Crestone, Bear Paw Energy or
         Midwestern Gas, such real property, buildings and equipment are held by
         Northern Border Pipeline, Crestone, Bear Paw Energy or Midwestern Gas
         under valid, subsisting and enforceable leases with such exceptions as
         are not material and do not interfere with the use made and proposed to
         be made of such real property, buildings and equipment by such person.

                           (l) The compliance by the Partnership and the
         Intermediate Partnership with all of the provisions of this Agreement
         and the consummation of the transactions contemplated herein and in the
         Final Prospectus to be consummated at the time of purchase will not
         conflict with or result in a breach or violation of any of the terms or
         provisions of, or constitute a default under, any indenture, mortgage,
         deed of trust, loan agreement or other agreement or instrument to which
         the Partnership or any of the Subsidiaries is a party or by which any
         of them is bound or to which any of the property or assets of any of
         them is subject, nor will such action result in any violation of the
         provisions of the agreement of limited partnership, charter or other
         governing documents of the Partnership or any of the Subsidiaries or
         any statute or any order, rule or regulation of any court or
         governmental agency or body having jurisdiction over any of them or any
         of their properties; and no consent, approval, authorization, order,
         registration or qualification of or with any such court or governmental
         agency or body is required for the consummation by the Partnership of
         the transactions contemplated herein and in the Final Prospectus to be
         consummated at the time of purchase, except for (i) such consents,
         approvals, authorizations, registrations or qualifications as may be
         required under state securities or Blue Sky laws in connection with the
         purchase and distribution of the Units by the Underwriter, and (ii)
         such consents, approvals, authorizations, orders, registrations or
         qualifications (A) as have been obtained or will be obtained prior to
         the time of purchase or (B) that, if not obtained, would not,
         individually or in the aggregate, have a material adverse effect upon
         the holders of Common Units or the consolidated financial position or
         results of operations or prospects of the Partnership, the Intermediate
         Partnership or Northern Border Pipeline. The offering and sale of the
         Units as contemplated by this Agreement does not give rise to any
         rights, other than those


                                      -7-



         which have been waived or satisfied, for or relating to the
         registration of any Common Units or other securities of the Partnership
         or which would require the inclusion of any Common Units or other
         securities of the Partnership in such offering and sale of the Units
         pursuant to "tag along" or other such rights.

                           (m) Other than as set forth in the Final Prospectus,
         there are no legal or governmental proceedings pending to which the
         Partnership or any of the Subsidiaries is a party or of which any of
         their respective properties is the subject which, if determined
         adversely to such person, would individually or in the aggregate have a
         material adverse effect on the consolidated financial position or
         results of operations or prospects of the Partnership; and, to the best
         of the Partnership's knowledge, no such proceedings are threatened or
         contemplated by governmental authorities or threatened by others.

                           (n) Arthur Andersen LLP, who have certified certain
         financial statements of Northern Border Pipeline, are independent
         public accountants with respect to Northern Border Pipeline, the
         Intermediate Partnership and the Partnership as required by the Act.

                           (o) (i) This Agreement has been duly authorized,
         executed and delivered by each of the Partnership and the Intermediate
         Partnership and constitutes the valid and binding agreement of each
         such person, (ii) the Partnership Agreement has been duly authorized,
         executed and delivered by the General Partners and is a valid and
         legally binding agreement of the General Partners, enforceable against
         the General Partners in accordance with its terms, and (iii) the
         Intermediate Partnership Agreement has been duly authorized, executed
         and delivered by the parties thereto and is a valid and legally binding
         agreement of such parties, enforceable against the General Partners in
         accordance with its terms, except as the enforceability of the
         Partnership Agreements may be affected by (A) the matters described in
         the Final Prospectus and (B) bankruptcy, insolvency, reorganization and
         other laws of general applicability relating to or affecting creditors'
         rights and general equitable principles.

                           (p) Each of the Partnership and the Subsidiaries
         carries, or is covered by, insurance in such amounts and covering such
         risks as is customarily obtained by businesses similarly situated,
         taking into account self-insurance.

                           (q) None of the Partnership or the Subsidiaries is
         in, nor will consummation of the transactions contemplated herein or in
         the Final Prospectus to be consummated at the time of purchase result
         in: (i) violation of its charter, bylaws, agreement of limited or
         general partnership or other governing document (except for the failure
         to mail the reports identified in Section 8.3(b) of the Partnership
         Agreement); or (ii) default (and no event has occurred which, with
         notice or lapse of time or both, would constitute such a default) in
         the due performance or observance of any term, covenant or condition
         contained in any material contract, agreement, indenture or instrument
         to which it or its property may be subject, or violation of any law,
         ordinance, governmental rule, regulation or court decree to which it or
         its property may be subject, which default or violation, individually
         or in the aggregate, could have a material adverse effect on the


                                      -8-



         holders of Common Units or the consolidated financial position or
         results of operations or prospects of any of the Partnership, the
         Intermediate Partnership or Northern Border Pipeline; and, except as
         described in the Final Prospectus, none of the Partnership or the
         Subsidiaries has failed to obtain any material license, permit,
         certificate, franchise or other governmental authorization or permit
         necessary to the ownership of its property or to the conduct of its
         business.

                           (r) Neither the Partnership nor the Intermediate
         Partnership is, or at the time of purchase will be, (a) a "holding
         company" or "affiliate" of a holding company (other than an exempt
         holding company) or public utility, as defined in the Public Utility
         Holding Company Act of 1935 or (b) an "investment company" as that term
         is defined in the Investment Company Act of 1940, as amended (the
         "Investment Company Act"), and the rules and regulations thereunder;

                           (s) Except as described in the Final Prospectus, the
         Partnership and the Subsidiaries possess, and are operating in
         compliance in all material respects with, all certificates, authorities
         or permits issued by the appropriate local, state, federal or foreign
         regulatory agencies or bodies necessary to conduct the business
         currently (or, as described or contemplated in the Final Prospectus, to
         be) operated by them, except for such certificates, authorizations or
         permits which, if not obtained, would not reasonably be expected to
         have, individually or in the aggregate, a material adverse effect upon
         the ability of the Partnership and the Subsidiaries to conduct their
         businesses in all material respects as currently conducted and as
         contemplated by the Final Prospectus to be conducted; and, except as
         described in the Final Prospectus, none of the Partnership or the
         Subsidiaries has received any notice of proceedings relating to the
         revocation or modification of any such certificate, authorization or
         permit which, individually or in the aggregate, if the subject of an
         unfavorable decision, ruling or finding, would be expected to have a
         material adverse effect upon the ability of the Partnership or the
         Subsidiaries to conduct their businesses in all material respects as
         currently conducted and as contemplated by the Final Prospectus to be
         conducted.

                           (t) Neither the Partnership nor the Intermediate
         Partnership has taken, directly or indirectly, any action designed to
         cause or result in, or which has constituted or which might reasonably
         be expected to constitute, the stabilization or manipulation of the
         price of the Common Units to facilitate the sale or resale of the
         Common Units in violation of any law, rule or regulation.

                           (u) The financial statements of the Partnership
         (including the related notes and supporting schedules) filed as part of
         or incorporated by reference in the Registration Statement or included
         or incorporated by reference in the Final Prospectus present fairly in
         all material respects the consolidated financial condition, results of
         operations and cash flows of the Partnership and its subsidiaries at
         the dates and for the periods indicated, and have been prepared in
         conformity with generally accepted accounting principles (except as
         otherwise described therein) applied on a consistent basis throughout
         the periods involved.



                                       -9-



                           (v) The Partnership maintains a system of internal
         accounting controls sufficient to provide reasonable assurance that (i)
         transactions are executed in accordance with management's general or
         specific authorization; (ii) transactions are recorded as necessary to
         permit preparation of financial statements in conformity with generally
         accepted accounting principles and to maintain accountability for
         assets; (iii) access to assets is permitted only in accordance with
         management's general or specific authorization; and (iv) the recorded
         accountability for assets is compared with existing assets at
         reasonable intervals and appropriate action is taken with respect to
         any differences.

                           (w) The Partnership and the Subsidiaries (i) are in
         compliance with any and all applicable foreign, federal, state and
         local laws and regulations relating to the protection of human health
         and safety, the environment or imposing liability or standards of
         conduct concerning any Hazardous Material (as hereinafter defined)
         ("Environmental Laws"), (ii) have received all permits, licenses or
         other approvals required of them under applicable Environmental Laws to
         conduct their respective businesses and (iii) are in compliance with
         all terms and conditions of any such permit, license or approval,
         except where such noncompliance with Environmental Laws, failure to
         receive required permits, licenses or other approvals or failure to
         comply with the terms and conditions of such permits, licenses or
         approvals would not, individually or in the aggregate, result in a
         material adverse effect on the condition (financial or otherwise) or on
         the earnings, business, properties, business prospects or operations of
         the Partnership and the Subsidiaries, taken as a whole. The term
         "Hazardous Material" means (A) any "hazardous substance" as defined by
         the Comprehensive Environmental Response, Compensation and Liability
         Act of 1980, as amended, (B) any "hazardous waste" as defined by the
         Resource Conservation and Recovery Act, as amended, (C) any petroleum
         or petroleum product, (D) any polychlorinated biphenyl and (E) any
         pollutant or contaminant or hazardous, dangerous, or toxic chemical,
         material, waste or substance regulated under or within the meaning of
         any other Environmental Law.

                           (x) In the ordinary course of their businesses, the
         Partnership and the Subsidiaries conduct a periodic review of the
         effect of Environmental Laws on the business, operations and properties
         of the Partnership and the Subsidiaries, in the course of which they
         identify and evaluate associated costs and liabilities (including,
         without limitation, any capital or operating expenditures required for
         clean-up, closure of properties or compliance with Environmental Laws
         or any permit, license or approval, any related constraints on
         operating activities and any potential liabilities to third parties).
         Except as set forth in the Registration Statement and the Final
         Prospectus there are no costs and liabilities associated with or
         arising in connection with Environmental Laws as currently in effect
         (including, without limitation, costs of compliance therewith) which
         would, singly or in the aggregate have a material adverse effect on the
         condition (financial or otherwise) or on the earnings, business,
         properties, business prospects or operations of the Partnership and the
         Subsidiaries, taken as a whole.

                           (y) The Partnership and the Subsidiaries are in
         compliance with all federal, state and local employment and labor laws,
         including, but not limited to, laws relating to non-discrimination in
         hiring, promotion and pay of employees; no labor


                                      -10-




         dispute exists involving the employees of Northern Plains or NBP
         Services Corporation, a Delaware corporation, or, to the knowledge of
         the Partnership or the Intermediate Partnership, is imminent or
         threatened; and neither the Partnership nor the Intermediate
         Partnership is aware of any existing, imminent or threatened labor
         disturbance by the employees of any of its principal suppliers,
         manufacturers or contractors that could result in a material adverse
         effect on the condition (financial or otherwise) or on the earnings,
         business, properties, business prospects or operations of the
         Partnership and the Subsidiaries, taken as a whole.

                           (z) The outstanding Common Units are listed for
         trading on the New York Stock Exchange, including the Units to be sold
         by the Selling Unitholders pursuant to this Agreement.

                  (ii) Each Selling Unitholder, severally and jointly,
represents and warrants to the Underwriter that:

                           (a) Such Selling Unitholder is the record and
         beneficial owner of the Units to be sold by it hereunder free and clear
         of all liens, encumbrances, equities and claims and has duly endorsed
         such Units in blank, and, assuming that (1) the Underwriter purchases
         such Units from such Selling Unitholder without notice of any adverse
         claim (within the meaning of Section 8-105 of the New York Uniform
         Commercial Code ("UCC")), (2) the Underwriter makes payment therefor as
         provided herein, (3) such Units are delivered to you in accordance with
         the provisions of the Custody Agreement (as defined below) and (4) the
         Underwriter obtains control of the Units (as provided in Section
         8-106(b) of the UCC), the Underwriter will have acquired all of the
         rights and interest in such Units, free of any adverse claim (within
         the meaning of Section 8-105 of the UCC).

                           (b) Such Selling Unitholder has not taken, directly
         or indirectly, any action designed to or that would constitute or that
         might reasonably be expected to cause or result in, under the Exchange
         Act or otherwise, stabilization or manipulation of the price of any
         security of the Partnership to facilitate the sale or resale of the
         Units.

                           (c) Such Selling Unitholder has and at the time of
         purchase will have, the requisite legal right and capacity or power and
         authority, and no consent, approval, authorization or order of any
         court or governmental agency or body is required for the consummation
         by such Selling Unitholder of the transactions contemplated herein,
         except such as may have been obtained under the Act and such as may be
         required under the blue sky laws of any jurisdiction in connection with
         the purchase and distribution of the Units by the Underwriter and such
         other approvals as have been obtained.

                           (d) Neither the sale of the Units being sold by such
         Selling Unitholder nor the consummation of any other of the
         transactions herein contemplated by such Selling Unitholder or the
         fulfillment of the terms hereof by such Selling Unitholder will
         conflict with, result in a breach or violation of, or constitute a
         default under (i) any indenture, mortgage, deed of trust, loan
         agreement or other agreement or instrument to


                                      -11-



         which the Selling Unitholder (or any affiliate of any Selling
         Unitholder) is a party or by which the Selling Unitholder is bound or
         to which any of the property or assets of the Selling Unitholder is
         subject, (ii) the charter or by-laws or other organizational documents
         of such Selling Unitholder, as applicable, or (iii) any law to which
         such Selling Unitholder (or any affiliate of any Selling Unitholder) is
         bound, or any judgment, order or decree applicable to such Selling
         Unitholder of any court, regulatory body, administrative agency,
         governmental body or arbitrator having jurisdiction over such Selling
         Unitholder, except in the case of clauses (i) and (iii), as would not
         have a material adverse effect on such Selling Unitholder's performance
         of its obligations hereunder.

                           (e) This Agreement has been, and at the time of
         purchase the Custody Agreement among Equiserve Trust Company, N.A., as
         custodian (the "Custodian"), and such Selling Unitholders (the "Custody
         Agreement") will have been, duly executed and delivered by such Selling
         Unitholder and each constitutes or will constitute, as applicable, a
         valid and binding agreement of such Selling Unitholder. At the time of
         purchase, the Custody Agreement will be enforceable against such
         Selling Unitholder in accordance with its terms except as the
         enforceability of the Custody Agreement may be affected by bankruptcy,
         insolvency, reorganization and other laws of general applicability
         relating to or affecting creditors' rights and general equitable
         principles.

                           (f) The sale of Units by such Selling Unitholder
         pursuant hereto is not prompted by any information concerning the
         Partnership or any of the Subsidiaries which is not set forth in the
         Final Prospectus or any supplement thereto.

                           (g) The information in the Final Prospectus under the
         caption "Principal and Selling Unitholders" which specifically relates
         to such Selling Unitholder does not, and will not at the time of
         purchase, contain any untrue statement of a material fact or omit to
         state any material fact required to be stated therein or necessary to
         make the statements therein, in the light of the circumstances in which
         they were made, not misleading.

                  Any certificate signed by any officer of any of the Selling
Unitholders, and delivered to the Underwriter or counsel for the Underwriter in
connection with the offering of the Units shall be deemed a representation and
warranty by such Selling Unitholder, severally and jointly, as to matters
covered thereby, to the Underwriter.

            4. Certain Covenants.

                  (i) The Partnership and the Intermediate Partnership agree
with the Underwriter:

                           (a) to furnish such information as may be required
         and otherwise to cooperate in qualifying the Units for offering and
         sale under the securities or blue sky laws of such states as you may
         designate and to maintain such qualifications in effect so long as
         required for the distribution of the Units; provided that the
         Partnership shall not be required to qualify as a foreign partnership
         or to consent to the service of


                                      -12-



         process under the laws of any such state (except service of process
         with respect to the offering and sale of the Units); and to promptly
         advise you of the receipt by the Partnership of any notification with
         respect to the suspension of the qualification of the Units for sale in
         any jurisdiction or the initiation or threatening of any proceeding for
         such purpose;

                           (b) during the period of time referred to in the
         second sentence in paragraph (e) below, to advise you and counsel for
         the Underwriter promptly and, if requested by you, to confirm such
         advice in writing: (i) of any request by the Commission for amendment
         of or a supplement to the Registration Statement, the Basic Prospectus
         or the Final Prospectus or for additional information; (ii) of the
         issuance by the Commission of any stop order suspending the
         effectiveness of the Registration Statement or of the suspension of
         qualification of the Units for offering or sale in any jurisdiction or
         the initiation of any proceeding for such purpose; and (iii) of any
         change in the business, prospects, financial condition or results of
         operations of the Partnership or the Intermediate Partnership, or of
         the happening of any event, which makes any statement of a material
         fact made in the Registration Statement or the Final Prospectus (as
         then amended or supplemented) untrue or that requires the making of any
         additions to or changes in the Registration Statement or the Final
         Prospectus (as then amended or supplemented) in order to state a
         material fact required by the Act to be stated therein or necessary in
         order to make the statements therein not misleading, or of the
         necessity to amend or supplement the Final Prospectus (as then amended
         or supplemented) to comply with the Act or any other law. If at any
         time within the period of time referred to in the second sentence in
         paragraph (e) below, the Commission shall issue any stop order
         suspending the effectiveness of the Registration Statement, the
         Partnership and the Intermediate Partnership will make every reasonable
         effort to obtain the withdrawal of such order at the earliest possible
         time;

                           (c) to furnish to you, at your request and without
         charge, (i) one signed copy of the Registration Statement as originally
         filed with the Commission and of each amendment thereto, including
         financial statements and all exhibits to the Registration Statement and
         (ii) such number of conformed copies of the Registration Statement as
         originally filed and of each amendment thereto, but without exhibits,
         as you may request;

                           (d) prior to the end of the period of time referred
         to in the second sentence in paragraph (e) below, not to file any
         amendment to the Registration Statement or make any amendment or
         supplement to the Final Prospectus, or file any document that, upon
         filing, becomes an Incorporated Document, of which you and counsel for
         the Underwriter shall not previously have been advised or to which,
         after you and counsel for the Underwriter shall have received a copy of
         the document proposed to be filed, you shall reasonably object;
         provided that your consent shall not be unreasonably withheld or
         delayed;

                           (e) to cause the Final Prospectus to be filed
         pursuant to, and in compliance with, Rule 424(b). As soon after the
         execution and delivery of this Agreement as possible and thereafter
         from time to time for such period as a prospectus is



                                      -13-



         required by the Act to be delivered in connection with sales of the
         Units by the Underwriter or any dealer, the Partnership and the
         Intermediate Partnership will expeditiously deliver to the Underwriter
         and each dealer, without charge but with any printing or delivery
         expenses to be paid by the Selling Unitholders as set forth below in
         Section 4(ii)(c), as many copies of the Final Prospectus (and of any
         amendment or supplement thereto) as you may reasonably request. The
         Partnership and the Intermediate Partnership consent to the use of the
         Final Prospectus (and of any amendment or supplement thereto) in
         accordance with the provisions of the Act and with the securities or
         Blue Sky laws of the jurisdictions in which the Units are offered by
         the Underwriter and by all dealers to whom Units may be sold, both in
         connection with the offering and sale of the Units and for such period
         of time thereafter as the Final Prospectus is required by the Act to be
         delivered in connection with sales of the Units by the Underwriter or
         any dealer. If during such period of time any event shall occur that in
         the judgment of the Partnership or the Intermediate Partnership or in
         the opinion of counsel for the Underwriter is required to be set forth
         in the Final Prospectus (as then amended or supplemented) or should be
         set forth therein in order to make the statements therein, in the light
         of the circumstances under which they were made, not misleading, or if
         it is necessary to supplement or amend the Final Prospectus (or to file
         under the Exchange Act any document that, upon filing, becomes an
         Incorporated Document) in order to comply with the Act or any other
         law, the Partnership and the Intermediate Partnership will forthwith
         prepare and, subject to the provisions of paragraph (d) above, file
         with the Commission an appropriate supplement or amendment thereto (or
         to such document), and will expeditiously furnish to the Underwriter
         and dealers a reasonable number of copies thereof, at the expense of
         the Selling Unitholders if such supplement is to the prospectus
         supplement relating to the offering of the Units. In the event that the
         Partnership or the Intermediate Partnership and the Underwriter agree
         that the Final Prospectus should be amended or supplemented, the
         Partnership and the Intermediate Partnership, if requested by you, will
         promptly issue a press release announcing or disclosing the matters to
         be covered by the proposed amendment or supplement; and

                           (f) to make generally available to its security
         holders as soon as practicable, but in any event not later than
         eighteen months after the "effective date of the Registration
         Statement" (as defined in Rule 158(c) of the Act), an earnings
         statement of the Partnership (which need not be audited) complying with
         Section 11(a) of the Act.

                  (ii) Each Selling Unitholder agrees, severally and jointly,
with the Underwriter:

                           (a) not to take, directly or indirectly, any action
         designed to or that would constitute or that might reasonably be
         expected to cause or result in, under the Exchange Act or otherwise,
         stabilization or manipulation of the price of any security of the
         Partnership to facilitate the sale or resale of the Units; and

                           (b) to advise you promptly, and if requested by you,
         will confirm such advice in writing, so long as delivery of a
         prospectus relating to the Units by an underwriter or dealer may be
         required under the Act, of (i) any material change in the Partnership's
         condition (financial or otherwise), prospects, earnings, business or



                                      -14-



         properties which comes to the attention of such Selling Unitholder,
         (ii) any change in information in the Registration Statement or the
         Final Prospectus relating to such Selling Unitholder or (iii) any new
         material information relating to the Partnership or relating to any
         matter stated in the Final Prospectus which comes to the attention of
         such Selling Unitholder; and

                           (c) to pay all expenses, fees and taxes (other than
         any transfer taxes and fees and disbursements of counsel for the
         Underwriter except as set forth under Section 5 hereof) in connection
         with (i) the preparation and filing of the Final Prospectus, and any
         supplements thereto, and the printing and furnishing of copies of each
         thereof to the Underwriter and to dealers (including costs of mailing
         and shipment), other than an amendment to the Registration Statement
         required in order for the Partnership to discharge its obligations
         under the Acquisition Agreement (as defined herein), (ii) the issuance,
         sale and delivery of the Units and (iii) the determination of
         eligibility of the Units for investment under state law (including the
         legal fees and other disbursements of counsel to the Underwriter) and
         the printing and furnishing of copies of any blue sky surveys or legal
         investment surveys to the Underwriter and to dealers.

            5. Reimbursement of Expenses.

                  (i) If the Units are not delivered for any reason other than
the termination of this Agreement pursuant to the first two paragraphs of
Section 7 hereof, the Selling Unitholders shall, in addition to paying the
amounts described in Section 4(ii)(c) hereof, reimburse the Underwriter for all
of its out-of-pocket expenses, including the fees and disbursements of its
counsel.

            If the Selling Unitholders are required to make any payments to the
Underwriter under this Section 5(i) as a result of the inaccuracy of a
representation or warranty hereunder of the Partnership or the Intermediate
Partnership, the failure of the Partnership or the Intermediate Partnership to
comply with their obligations hereunder or the failure to satisfy the conditions
set forth in Sections 6(i), 6(ii), 6(iv), 6(vi), 6(vii), 6(viii), 6(ix), 6(x),
6(xii) (but only insofar as such provision applies to the Partnership) and
6(xiv), the Partnership shall reimburse the Selling Unitholder on demand for the
amounts paid to the Underwriter under this Section 5(i).

                  (ii) In addition to paying the amounts described in Sections
4(ii)(c) and 5(i) hereof, the Selling Unitholders shall reimburse the
Partnership and the Intermediate Partnership on demand for all out-of-pocket
expenses, fees and taxes incurred by the Partnership or the Intermediate
Partnership in connection with the offering of the Units that would not have
otherwise been incurred by the Partnership or the Intermediate Partnership
(excluding amounts incurred for the services provided by any officers, members
of the Partnership Policy Committee, directors or employees of the Partnership,
the Intermediate Partnership or their affiliates).

            6. Conditions of Underwriter's Obligations. The obligations of the
Underwriter hereunder are subject to the accuracy of the representations and
warranties set forth in this Agreement on the part of the Partnership and the
Selling Unitholders on the date hereof



                                      -15-



and at the time of purchase (unless previously waived), the performance by the
Partnership of its obligations hereunder and to the following additional
conditions precedent:

                  (i) The Partnership shall have requested and caused Vinson &
Elkins L.L.P., counsel for the Partnership, to have furnished to you their
opinion, dated the time of purchase, and addressed to the Underwriter, to the
effect that:

                           (a) Each of the Partnership and the Intermediate
         Partnership has been duly formed and is validly existing as a limited
         partnership under the Delaware Act, with full partnership power and
         authority under the Delaware Act and the Partnership Agreement and the
         Intermediate Partnership Agreement, respectively, necessary to own,
         lease and operate its properties and conduct its business as described
         in the Final Prospectus;

                           (b) The Partnership has been registered as a foreign
         limited partnership for the transaction of business under the laws of
         the State of Texas, and to such counsel's knowledge based upon a
         certificate (a copy of which has been furnished to you and your
         counsel) from an authorized officer of the Partnership as to the states
         in which the Partnership owns or leases property or conducts business,
         the State of Texas is the only jurisdiction in which the Partnership
         owns or leases property or conducts business so as to require
         qualification or registration to conduct business as a foreign limited
         partnership, except where the failure to so qualify or register would
         not (i) have a material adverse effect upon the Partnership, the
         Intermediate Partnership or the General Partners or (ii) subject the
         limited partners of the Partnership to any material liability or
         disability;

                           (c) The Intermediate Partnership has been qualified
         or registered as a foreign limited partnership for the transaction of
         business under the laws of the States of Illinois, Iowa, Indiana,
         Minnesota, Montana, Nebraska, North Dakota, South Dakota and Texas, and
         to such counsel's knowledge based upon a certificate (a copy of which
         has been furnished to you and your counsel) from an authorized officer
         of the Partnership as to the states in which the Partnership owns or
         leases property or conducts business, such jurisdictions are the only
         jurisdictions in which the Intermediate Partnership owns or leases
         property or conducts business so as to require qualification or
         registration to conduct business as a foreign limited partnership,
         except where the failure to so qualify or register would not (i) have a
         material adverse effect upon the Partnership, the Intermediate
         Partnership or the General Partners or (ii) subject the limited
         partners of the Partnership to any material liability or disability;

                           (d) The General Partners are the sole general
         partners of each of the Partnership and the Intermediate Partnership
         with a combined general partner interest in the Partnership of 1.0% and
         a combined general partner interest in the Intermediate Partnership of
         1.0101% (subject to the provisions of the Partnership Agreement and the
         Intermediate Partnership Agreement, respectively); such general partner
         interests are duly authorized by the Partnership Agreement and the
         Intermediate Partnership Agreement, respectively, are validly issued
         and fully paid (to the extent required by the Partnership Agreement and
         Intermediate Partnership Agreement) and are



                                      -16-



         owned of record by the General Partners free and clear of all liens,
         encumbrances, security interests, equities, charges or claims of record
         (except as provided in the Partnership Agreement, the Intermediate
         Partnership Agreement or the Northern Border Pipeline Partnership
         Agreement or pursuant to the Delaware Act, as amended) (A) in respect
         of which a financing statement under the Uniform Commercial Code of the
         State of Delaware naming a General Partner as debtor is on file in the
         offices of the Secretary of State of the State of Delaware or (B)
         otherwise known to such counsel;

                           (e) The Partnership is the sole limited partner of
         the Intermediate Partnership, with a limited partner interest in the
         Intermediate Partnership of 98.9899% (subject to the provisions of the
         Intermediate Partnership Agreement); such limited partner interest is
         duly authorized by the Intermediate Partnership Agreement and is
         validly issued, fully paid and non-assessable, except as provided in
         Section 17-607 of the Delaware Act; and the Partnership owns such
         limited partner interest in the Intermediate Partnership free and clear
         of all liens, encumbrances, security interests, equities, charges or
         claims of record (except as provided in the Intermediate Partnership
         Agreement or pursuant to the Delaware Revised Uniform Limited
         Partnership Act, as amended) (A) in respect of which a financing
         statement under the Uniform Commercial Code of the State of Delaware
         naming the Partnership as debtor is on file in the offices of the
         Secretary of State of the State of Delaware or (B) otherwise known to
         such counsel;

                           (f) Immediately prior to the closing under this
         Agreement, the limited partners of the Partnership held limited partner
         interests in the Partnership aggregating 99.0% (subject to the
         provisions of the Partnership Agreement); such limited partner
         interests are represented by 41,623,014 Common Units; such limited
         partner interests will be the only limited partner interests of the
         Partnership that are issued and outstanding immediately following the
         closing under this Agreement; the Units, when issued to the Selling
         Unitholders, were authorized by the Partnership Agreement and were
         validly issued, fully paid and non-assessable, except as provided in
         Section 17-607 of the Delaware Act;

                           (g) Insofar as such descriptions relate to legal
         matters or descriptions of provisions of the governing instruments, the
         Common Units conform in all material respects to the descriptions
         thereof contained in the Final Prospectus;

                           (h) Except as described in the Final Prospectus and
         contained in the Partnership Agreement and except for (i) rights
         granted pursuant to that certain Exchange Agreement dated May 31, 1997
         among the Intermediate Partnership, the Partnership and the
         stockholders of Williams Technologies, Inc. and (ii) rights granted
         pursuant to that certain Exchange Agreement dated December 29, 1997
         between the Partnership and Central Pacific Resources Partnership,
         there are no preemptive or other rights to subscribe for or to purchase
         any limited partner interests of the Partnership or the Intermediate
         Partnership pursuant to the Partnership Agreements or, to such
         counsel's knowledge, pursuant to any other agreement or instrument to
         which the Partnership or the Intermediate Partnership is a party; and
         except as described in the Final Prospectus and except for restrictions
         on transfer of securities issued by the Partnership in reliance on
         Section 4(2) of the Act, there are no restrictions upon the voting or
         transfer of any limited



                                      -17-



         partner interests of the Partnership or the Intermediate Partnership
         pursuant to the Partnership Agreements or, to such counsel's knowledge,
         pursuant to any other agreement or instrument to which the Partnership
         or the Intermediate Partnership is a party.

                           (i) The Registration Statement was declared effective
         under the Act on July 27, 2001; the Final Prospectus was filed with the
         Commission pursuant to subparagraph (2) of Rule 424(b) on October 16,
         2001; and no stop order suspending the effectiveness of the
         Registration Statement has been issued and, to such counsel's
         knowledge, no proceeding for that purpose is pending or threatened by
         the Commission;

                           (j) The Registration Statement and the Final
         Prospectus and any further amendments or supplements thereto made by
         the Partnership prior to the time of purchase (other than the financial
         statements and related schedules or other financial or statistical data
         and the projected data included therein, as to which we express no
         opinion) comply as to form in all material respects with the
         requirements of the Act;

                           (k) To such counsel's knowledge, there are no
         contracts or other documents that are required to be summarized or
         described in the Final Prospectus or filed as exhibits to the
         Registration Statement by the Act that have not been summarized,
         described or incorporated by reference in the Final Prospectus or filed
         as exhibits to the Registration Statement;

                           (l) The statements contained in the Basic Prospectus
         under the caption "Tax Considerations" and in the Final Prospectus
         under the caption "Prospectus Supplement Summary - Tax Considerations,"
         insofar as such statements describe federal statutes, rules and
         regulations, constitute a fair summary thereof that is accurate in all
         material respects; such counsel's opinion filed as Exhibit 8 to the
         Registration Statement and as Exhibit 8 to the Partnership's Form 8-K
         filed on October 16, 2001, are confirmed, and you may rely upon such
         opinions as if each of them were addressed to you;

                           (m) This Agreement has been duly authorized, executed
         and delivered by each of the Partnership and the Intermediate
         Partnership; assuming due authorization, execution and delivery by, and
         the validity, legally binding effect and enforceability with respect
         to, the other parties thereto, the General Partnership Agreement
         governing Northern Border Pipeline, as amended and in effect on the
         date hereof, and each of the Partnership Agreements constitute valid
         and legally binding agreements of each of the Partnership, the
         Intermediate Partnership and the General Partners (in each case, to the
         extent a party thereto) and are enforceable against each such party in
         accordance with their respective terms, subject to the qualifications
         that (A) the enforceability of each such agreement may be limited by
         bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium
         and other similar laws of general applicability relating to or
         affecting the rights of creditors generally, (B) the enforceability of
         each such agreement may be limited by public policy, applicable law
         relating to fiduciary duties and the judicial imposition of an implied
         covenant of good faith and fair dealing, (C) the enforceability of
         equitable rights and remedies provided for in each such agreement is
         subject to equitable defenses and judicial discretion, and



                                      -18-



         (D) the enforceability of certain other provisions of each such
         agreement may be limited by applicable laws and court decisions, none
         of which should materially and adversely interfere with the practical
         realization of the material benefits intended to be provided by such
         agreements;

                           (n) The compliance by each of the Partnership and the
         Intermediate Partnership with all of the provisions of this Agreement
         will not, with the passage of time or upon stated contingency or
         otherwise, (A) conflict with or result in a breach or violation of any
         of the terms or provisions of, or constitute a default under, any of
         the agreements filed or incorporated by reference as exhibits to the
         Partnership's Annual Report on Form 10-K for the year ended December
         31, 2000 (the "2000 10-K") or any report filed by the Partnership with
         the Commission subsequent to the filing of the 2000 10-K, or (B) result
         in any breach or violation of the provisions of the certificate of
         limited partnership of the Partnership or the Intermediate Partnership
         or of any statute or any rule or regulation of any governmental agency
         or body having jurisdiction over either of such entities or its
         properties, excluding in each case any breaches or violations which,
         individually or in the aggregate, would not have a material adverse
         effect on the limited partners of the Partnership or the financial
         condition, results of operation, business or prospects (as described in
         the Final Prospectus) of the Partnership and the Intermediate
         Partnership considered as a whole;

                           (o) Except as described in the Final Prospectus, or
         as provided in the Partnership Agreement and the Acquisition Agreement,
         dated March 14, 2001 (the "Acquisition Agreement"), among the
         Partnership, the Intermediate Partnership, Bear Paw Investments, Bear
         Paw Energy and the other parties named therein, to such counsel's
         knowledge there are no contracts, agreements or understandings between
         the Partnership, the Intermediate Partnership or the General Partners
         and any person granting such person the right to require the
         Partnership to file a registration statement under the Act with respect
         to any securities of the Partnership owned or to be owned by such
         person or to require the Partnership to include such securities in the
         securities registered pursuant to the Registration Statement or in any
         securities being registered pursuant to any other registration
         statement filed by the Partnership under the Act; and none of such
         rights described in this paragraph would require any such securities to
         be included in the offering and sale of the Units;

                           (p) Neither the Partnership nor the Intermediate
         Partnership is an "investment company" as that term is defined in the
         Investment Company Act and the rules and regulations thereunder and
         each General Partner is either (A) not an "investment company" as that
         term is defined in the Investment Company Act and the rules and
         regulations thereunder or (B) exempt from the Investment Company Act;

                           (q) None of the Partnership, the Intermediate
         Partnership or any General Partner is a "public utility company," a
         "holding company" or an "affiliate" of a holding company (other than an
         exempt holding company) or a public utility company within the meaning
         of the Public Utility Holding Company Act of 1935, as amended;



                                      -19-



                           (r) No consent, approval, authorization, order,
         registration or qualification of or with any federal governmental
         agency or body or any governmental agency or body of the State of Texas
         is required for the sale of the Common Units or the consummation by any
         of the Partnership, the Intermediate Partnership, the General Partners
         of the transactions contemplated by this Agreement and the Final
         Prospectus, except (i) such consents, approvals, authorizations,
         orders, registrations or qualifications (a) as have been obtained, (b)
         as may be required under state securities or Blue Sky laws, or (c)
         which, if not obtained, would not, individually or in the aggregate,
         have a material adverse effect upon the ability of the Partnership and
         the Intermediate Partnership to conduct their business as described in
         the Final Prospectus;

                           (s) The Common Units outstanding immediately prior to
         the closing under this Agreement are listed on the New York Stock
         Exchange; and

                           (t) Northern Border Pipeline is validly existing as a
         general partnership under the laws of the State of Texas, with full
         partnership power and authority to own, lease and operate its
         properties and conduct its business in all material respects as
         described in the Final Prospectus.

                  In addition, such counsel shall state that in the course of
preparation by the Partnership of the Registration Statement and the Final
Prospectus, such counsel participated in conferences with officers and other
representatives of the Partnership and certain of the Subsidiaries,
representatives of the independent public accountants of the Partnership and, in
the case of the Final Prospectus, your representatives, at which the contents of
the Registration Statement, Final Prospectus and related matters were discussed.
Such counsel shall also state that although they have not conducted any
independent investigation with regard to the information set forth in the
Registration Statement or the Final Prospectus (except with respect to the
foregoing opinions) and are not (except as aforesaid) passing upon and do not
assume any responsibility for the accuracy, completeness or fairness of the
statements contained therein, on the basis of the foregoing, no facts have come
to such counsel's attention that cause such counsel to believe that the
Registration Statement or any amendment thereto on the date it became effective,
or as supplemented or amended at the time of purchase contained any untrue
statement of a material fact or omitted to state a material fact required to be
stated therein or necessary to make the statements therein not misleading, or
that, as of its date or the time of purchase the Final Prospectus or any further
amendment or supplement thereto contained an untrue statement of a material fact
or omitted a material fact required to be stated therein or necessary to make
the statements therein, in light of the circumstances under which they were
made, not misleading. In making such statement, such counsel may state that they
do not express any comment with respect to the financial statements and related
schedules and other financial data included or incorporated by reference in the
Registration Statement or in the Final Prospectus or any further amendment or
supplement thereto (including, without limitation, statements relating to
projected cash distributions to the limited partners of the Partnership) or any
statement contained therein or omitted therefrom in reliance upon and in
conformity with written information furnished to the Partnership by the
Underwriter through you expressly for use therein. Such opinion shall state that
the Selling Unitholders are entitled to rely on the statements in this
paragraph.



                                      -20-



                                    In rendering such opinion, such counsel may
         rely (A) as to matters involving the application of the Delaware Act,
         the Delaware Limited Liability Company Act, the Delaware General
         Corporation Law and the laws of the States of New York and Texas, to
         the extent they deem proper and specified in such opinion, upon the
         opinion of other counsel of good standing whom they believe to be
         reliable and who are satisfactory to counsel for the Underwriter and
         (B) as to matters of fact, to the extent they deem proper, on
         certificates of responsible officers of the Partnership and public
         officials. References to the Final Prospectus in this paragraph (b)
         include any supplements thereto at the time of purchase.

                  (ii) The Partnership shall have requested and caused Janet K.
Place, Esq., General Counsel of Northern Plains, to have furnished to you her
opinion with respect to the Common Units, dated the time of purchase and
addressed to the Underwriter, to the effect that:

                           (a) Other than as set forth in the Final Prospectus,
         to her knowledge there are no legal or governmental proceedings pending
         to which the Partnership or any of the Subsidiaries is a party or of
         which any property of any of them is the subject which, if determined
         adversely to such person, would individually or in the aggregate have a
         material adverse effect on the Partnership and its Subsidiaries taken
         as a whole (a "Material Adverse Effect"); and, to her knowledge, no
         such proceedings are threatened or contemplated by governmental
         authorities or threatened by others.

                           (b) Except as described in the Final Prospectus, to
         her knowledge each of the Partnership and the Subsidiaries possesses,
         and is operating in compliance in all material respects with, all
         certificates, authorities or permits issued by the appropriate local,
         state or federal regulatory agencies or bodies necessary to conduct its
         business as it is currently conducted as described in the Final
         Prospectus, except for such certificates, authorizations or permits
         which, if not obtained, would not reasonably be expected to have,
         individually or in the aggregate, a material adverse effect upon the
         ability of the Partnership and each of the Subsidiaries to conduct its
         businesses in all material respects as currently conducted as described
         in the Final Prospectus; to her knowledge, the Partnership and each of
         the Subsidiaries possesses all certificates, authorities or permits
         issued by the appropriate local, state or federal regulatory agencies
         or bodies necessary to conduct its business as proposed to be conducted
         as described in the Final Prospectus, except for (a) certificates,
         authorizations or permits that, if not obtained, would not reasonably
         be expected to have, individually or in the aggregate, a Material
         Adverse Effect; and (b) certificates, authorizations or permits that
         are reasonably expected to be obtained in the ordinary course of
         business; and, except as described in the Final Prospectus, none of the
         Partnership or any of the Subsidiaries has received any notice of
         proceedings relating to the revocation or modification of any such
         certificate, authorization or permit which, individually or in the
         aggregate, if the subject of an unfavorable decision, ruling or
         finding, would be expected to have a Material Adverse Effect. All
         government regulations, authorizations and procedures which affect the
         Partnership or any of the Subsidiaries and the operation of their
         respective businesses and that are required to be described in the
         Final Prospectus are as described therein.



                                      -21-



                           (c) The Partnership and each of the Subsidiaries (1)
         is in compliance with any and all applicable Environmental Laws, (2)
         has received all permits, licenses or other approvals required of them
         under applicable Environmental Laws to conduct its business and (3) is
         in compliance with all terms and conditions of any such permit, license
         or approval, except where such noncompliance with Environmental Laws,
         failure to receive required permits, licenses or other approvals or
         failure to comply with the terms and conditions of such permits,
         licenses or approvals would not, individually or in the aggregate,
         result in a Material Adverse Effect; provided, such counsel may qualify
         such opinions to her knowledge with respect to Bear Paw Investments,
         Bear Paw Energy, Border Midwestern and Midwestern Gas.

                           (d) None of the Partnership or any of the
         Subsidiaries is: (i) in violation of its charter, bylaws, agreement of
         limited or general partnership or other governing document (except for
         the failure to mail the reports identified in Section 8.3(b) of the
         Partnership Agreement), (ii) in default in any material respect, and no
         event has occurred which, with notice or lapse of time or both, would
         constitute such a default, in the due performance or observance of any
         term, covenant or condition contained in any indenture, mortgage, deed
         of trust, loan agreement or other agreement or instrument to which it
         is a party or by which it is bound or to which any of its properties or
         assets is subject, or (iii) other than as set forth in the Final
         Prospectus, in violation in any material respect of any law, ordinance,
         government rule, regulation or court decree to which it or its
         properties or assets may be subject, except for such violations and
         defaults that would not, individually or in the aggregate, result in an
         Material Adverse Effect; provided, such counsel may qualify the opinion
         in this clause (iii) to her knowledge with respect to Bear Paw
         Investments, Bear Paw Energy, Border Midwestern and Midwestern Gas.

                           (e) Since the date as of which information is given
         in the Final Prospectus through the date hereof, and except as may
         otherwise be disclosed in the Final Prospectus, the Partnership has not
         (i) issued or granted any partner interests, (ii) incurred any material
         liability or obligation, direct or contingent, other than liabilities
         and obligations that were incurred in the ordinary course of business,
         (iii) entered into any material transaction not in the ordinary course
         of business or (iv) distributed any of the cash or other assets of the
         Partnership to any partner.

                           (f) The Partnership and the Subsidiaries have good
         and indefeasible title to all real and personal property necessary to
         own and operate their businesses in all material respects as described
         in the Final Prospectus, free and clear of all liens, claims,
         encumbrances and defects except (1) as described in the Final
         Prospectus and (2) such as do not materially interfere with the
         ownership, operation or benefits of ownership of such businesses or
         materially increase the cost of operation or ownership of such
         businesses, provided that, (a) with respect to the Pipeline Properties,
         the foregoing shall only constitute a statement that, to her knowledge,
         except as described in the Final Prospectus (i) Northern Border
         Pipeline, Crestone, Bear Paw Energy and Midwestern Gas have sufficient
         title to enable them to use such Pipeline Properties in their
         businesses as they have been used in the past and are proposed to be
         used in the future as described in the Final Prospectus and (ii) any
         lack of title has not had and is not reasonably likely to have a
         Material Adverse Effect, and (b) with respect to any real



                                      -22-



         property, buildings and equipment held under lease by Northern Border
         Pipeline, Crestone, Bear Paw Energy or Midwestern Gas, such real
         property, buildings and equipment are held by Northern Border Pipeline,
         and to her knowledge, by Crestone, Bear Paw Energy and Midwestern Gas
         under valid, subsisting and enforceable leases with such exceptions as
         have not had and are not reasonably likely to have a Material Adverse
         Effect.

                           (g) Each of Northern Border Pipeline, Crestone, Bear
         Paw Investments, Bear Paw Energy, Border Midwestern and Midwestern Gas
         was duly formed (to her knowledge in the case of the latter four
         entities) and is validly existing and in good standing under the laws
         of its jurisdiction of formation and has full corporate, partnership or
         limited liability company power and authority, as the case may be, to
         conduct the activities conducted by it, to own or lease all the assets
         owned or leased by it and to conduct its business as described in the
         Final Prospectus. Each of Northern Border Pipeline, Crestone, Bear Paw
         Energy and Midwestern Gas is duly licensed or qualified to do business
         and in good standing as a foreign entity in all jurisdictions in which
         the nature of the activities conducted by it or the character of the
         assets owned or leased by it makes such licensing or qualification
         necessary, except for such jurisdictions in which the failure so to
         qualify or register would not have a material adverse effect upon it or
         subject it or the Partnership to any material liability or disability.
         All of the outstanding interests of Northern Border Pipeline have been
         duly authorized and validly issued and are fully paid and
         non-assessable (except as provided in the partnership agreement of
         Northern Border Pipeline). The Intermediate Partnership owns a 70%
         general partner interest in Northern Border Pipeline, and such interest
         is free and clear of any liens, claims or encumbrances (except for such
         liens, encumbrances, security interests, equities, charges or claims as
         are not, individually or in the aggregate, material or except as
         described in the Final Prospectus). All of the outstanding shares of
         Crestone have been duly authorized and validly issued and are fully
         paid and non-assessable and are owned by the Intermediate Partnership
         free and clear of all liens, claims or encumbrances (except for such
         liens, encumbrances, security interests, equities, charges or claims as
         are not, individually or in the aggregate, material or except as
         described in the Final Prospectus). All of the outstanding interests of
         Bear Paw Investments have been duly authorized and validly issued and
         are fully paid and non-assessable and are owned by the Intermediate
         Partnership free and clear of any liens, claims or encumbrances (except
         for such liens, encumbrances, security interests, equities, charges or
         claims as are not, individually or in the aggregate, material or except
         as described in the Final Prospectus). All of the outstanding interests
         of Bear Paw Energy have been duly authorized and validly issued and are
         fully paid and non-assessable and are owned by Bear Paw Investments
         free and clear of any liens, claims or encumbrances (except for such
         liens, encumbrances, security interests, equities, charges or claims as
         are not, individually or in the aggregate, material or except as
         described in the Final Prospectus). All of the outstanding shares of
         capital stock of Border Midwestern have been duly authorized and
         validly issued and are fully paid and non-assessable and are owned by
         the Intermediate Partnership free and clear of any liens, claims or
         encumbrances (except for such liens, encumbrances, security interests,
         equities, charges or claims as are not, individually or in the
         aggregate, material or except as described in the Final Prospectus).
         All of the outstanding shares of capital stock of Midwestern Gas have
         been duly authorized and



                                      -23-



         validly issued and are fully paid and non-assessable and are owned by
         Border Midwestern free and clear of any liens, claims or encumbrances
         (except for such liens, encumbrances, security interests, equities,
         charges or claims as are not, individually or in the aggregate,
         material or except as described in the Final Prospectus); provided such
         counsel may qualify to her knowledge the opinions (i) as to due
         authorization, valid issuance, full payment and non-assessability with
         respect to Bear Paw Investments, Bear Paw Energy and Midwestern Gas and
         (ii) as to liens, encumbrances and claims enforceable under the UCC
         with respect to Bear Paw Investments and Bear Paw Energy.

                           In addition, such counsel shall state that in the
course of preparation by the Partnership of the Registration Statement and the
Final Prospectus, such counsel participated in conferences with officers and
other representatives of the Partnership and certain of the Subsidiaries,
representatives of the independent public accountants of the Partnership and, in
the case of the Final Prospectus, your representatives, at which the contents of
the Registration Statement, the Final Prospectus and related matters were
discussed. Such counsel shall also state that although she has not conducted any
independent investigation with regard to the information set forth in the
Registration Statement or the Final Prospectus (except with respect to the
foregoing opinions) and is not (except as aforesaid) passing upon and does not
assume any responsibility for the accuracy, completeness or fairness of the
statements contained therein, on the basis of the foregoing and during the
course of her representation of Northern Plains, no facts have come to such
counsel's attention that cause such counsel to believe that the Registration
Statement or any amendment thereto on the date it became effective, or as
amended or supplemented at the time of purchase, contained any untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein not misleading, or that, as
of its date or the time of purchase, the Final Prospectus or any further
amendment or supplement thereto contained an untrue statement of a material fact
or omitted a material fact required to be stated therein or necessary to make
the statements therein, in light of the circumstances under which they were
made, not misleading. In making such statement, such counsel may state that she
does not express any comment with respect to the financial statements and
related schedules and other financial data included or incorporated by reference
in the Registration Statement or in the Final Prospectus or any further
amendment or supplement thereto (including, without limitation, statements
relating to projected cash distributions to the limited partners of the
Partnership) or any statement contained therein or omitted therefrom in reliance
upon and in conformity with written information furnished to the Partnership by
the Underwriter through you expressly for use therein. Such opinion shall also
state that the Selling Unitholders are entitled to rely on the statements in
this paragraph.

                           In rendering such opinion, such counsel may rely (A)
as to matters involving the application of laws of any jurisdiction other than
the State of Nebraska, to the extent she deems proper and specified in such
opinion, upon the opinion of other counsel of good standing whom she believes to
be reliable and who are satisfactory to counsel for the Underwriter and (B) as
to matters of fact, to the extent she deems proper, on certificates of
responsible officers of the Partnership and public officials.

                  (iii) The Selling Unitholders shall have requested and caused
O'Sullivan LLP, counsel to the Selling Unitholders, to have furnished to you
their opinion dated the time of purchase, and addressed to the Underwriter, to
the effect that:



                                      -24-



                           (a) This Agreement and the Custody Agreement have
         been duly authorized, executed and delivered by each of the Selling
         Unitholders, and each of the Selling Unitholders has the requisite
         power and authority to sell, transfer and deliver in the manner
         provided in this Agreement the Units being sold by the Selling
         Unitholders hereunder;

                           (b) Assuming, without any investigation, the accuracy
         and completeness of the information contained in the Final Prospectus
         under the caption "Principal and Selling Unitholders," the statements
         therein, insofar as such statements relate solely to the Selling
         Unitholders, appear on their face to be appropriately responsive in all
         material respects to the requirements of Item 507 of Regulation S-K
         promulgated under the Act.

                           (c) No consent, approval, authorization or order of
         any federal or New York court or governmental agency or body is
         required for the consummation by each of the Selling Unitholders of the
         transactions contemplated herein, except such as may have been obtained
         under the Act and such as may be required under the Act, the state
         securities or blue sky laws of any jurisdiction and the rules of the
         National Association of Securities Dealers, Inc. in connection with the
         sale of Units by the Selling Unitholders to the Underwriter hereunder
         and the purchase and distribution thereof by the Underwriter and such
         other approvals (specified in such opinion) as have been obtained;

                           (d) Neither the sale of the Units nor the
         consummation of any other of the transactions herein contemplated by
         each of the Selling Unitholders nor the fulfillment of the terms hereof
         by each of the Selling Unitholders will conflict with, result in a
         breach or violation of, or constitute a default under (i) any
         indenture, mortgage, deed of trust, loan agreement or other agreement
         or instrument to which each of the Selling Unitholders is a party or by
         which each of the Selling Unitholders is bound or to which any of the
         property or assets of each of the Selling Unitholders is subject, which
         has been identified in an officer's certificate to such counsel as
         being material, (ii) in the case of Cub Investment, LLC, its
         certificate of formation, operating agreement, or bylaws, (iii) in the
         case of Haddington/Chase Energy Partners (Bear Paw) LP, its certificate
         of limited partnership or limited partnership agreement, or (iv) any
         Applicable Law or any judgment, order or decree known to such counsel
         to be applicable to the Selling Unitholders of any New York or federal
         court or administrative or governmental agency having jurisdiction over
         the Selling Unitholders under Applicable Law (with Applicable Law
         defined in such opinion to mean the Delaware Limited Liability Company
         Act, the Delaware Revised Uniform Limited Partnership Act and those
         statutes, rules and regulations of the State of New York and the United
         States of America, which, in such counsel's experience, are typically
         applicable to offerings of the type contemplated by this Agreement,
         other than the United States federal securities laws, the state
         securities or blue sky laws, antifraud laws, and the rules and
         regulations of the National Association of Securities Dealers, Inc.);
         and

                           (e) Assuming that (i) the Underwriter purchases the
         Units from each of the Selling Unitholders without notice of any
         adverse claim (within the meaning of Section 8-105 of the UCC), (ii)
         the Underwriter makes payment therefor as provided


                                      -25-



         herein, (iii) the Units to be sold by the Selling Unitholders are
         delivered to you in accordance with the provisions of the Custody
         Agreement and (iv) the Underwriter obtains control of the Units being
         sold by the Selling Unitholders (as provided in Section 8-106(b) of the
         UCC), the Underwriter will have acquired all of the Selling
         Unitholders' respective rights and interest in such Units free of any
         adverse claim (within the meaning of Section 8-105 of the UCC).

            In rendering such opinion, such counsel may rely as to matters of
fact, to the extent such counsel deems proper, on certificates of responsible
officers of the Selling Unitholders and public officials.

                  (iv) You shall have received from Arthur Andersen LLP, letters
dated, respectively, the date of this Agreement and the time of purchase, and
addressed to the Underwriter and the Selling Unitholders (with reproduced copies
for each of the Selling Unitholders and the Underwriter) in the forms heretofore
approved by the Underwriter.

                  (v) You shall have received at the time of purchase, the
favorable opinion of Andrews & Kurth L.L.P., counsel for the Underwriter, dated
the time of purchase, with respect to such matters as may be reasonably
requested by the Underwriter.

                  (vi) All filings, if any, required by Rule 424(b) shall have
been timely made; and no stop order suspending the effectiveness of the
Registration Statement shall have been issued and no proceedings for that
purpose shall have been instituted or threatened.

                  (vii) Since the date as of which information is given in the
Final Prospectus there shall not have been any change or any development
involving a prospective change, in or affecting the condition (financial or
otherwise), earnings, business or properties of the Partnership or Intermediate
Partnership, taken as a whole, otherwise than as set forth or contemplated in
the Final Prospectus, the effect of which, in any such case described in clause
(i) or (ii), is in your judgment so material and adverse as to make it
impracticable or inadvisable to proceed with the public offering or the delivery
of the Common Units being delivered at such time of purchase on the terms and in
the manner contemplated in the Final Prospectus;

                  (viii) There shall have been furnished to you at such time of
purchase certificates satisfactory to you, signed on behalf of the Partnership
by an authorized officer thereof to the effect that:

                           (a) the representations and warranties of the
         Partnership and the Intermediate Partnership in this Agreement are true
         and correct in all material respects (except that all those
         representations and warranties that are qualified as to their
         materiality are true and correct in all respects) at and as of the time
         of purchase with the same effect as if made at the time of purchase and
         the Partnership has complied with all the agreements and satisfied all
         the conditions on its part to be performed or satisfied at or prior to
         the time of purchase;

                           (b) no stop order suspending the effectiveness of the
         Registration Statement has been issued and no proceedings for that
         purpose have been instituted or, to the Partnership's knowledge,
         threatened; and


                                      -26-




                           (c) since the date of the most recent financial
         statements included or incorporated by reference in the Final
         Prospectus (exclusive of any supplement thereto), there has been no
         material adverse effect on the condition (financial or otherwise),
         prospects, earnings, business or properties of the Partnership and its
         Subsidiaries, taken as a whole, whether or not arising from
         transactions in the ordinary course of business, except as set forth in
         or contemplated in the Final Prospectus (exclusive of any supplement
         thereto).

                  (ix) The Registration Statement shall become effective, or if
Rule 430A under the Act is used, the Final Prospectus shall have been filed with
the Commission pursuant to Rule 424(b) under the Act, at or before 5:00 P.M.,
New York City time, on the business day after the date of this Agreement unless
a later time shall be agreed to by the Partnership, the Selling Unitholders and
you in writing or by telephone, confirmed in writing; provided, however, that
the Partnership, the Selling Unitholders and you may from time to time agree on
a later date.

                  (x) (A) The Registration Statement and all amendments thereto,
or modifications thereof, if any, shall not contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading; and (B) the Final
Prospectus and all amendments or supplements thereto, or modifications thereof,
if any, shall not contain an untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements therein, in the light of the circumstances under which they are made,
not misleading.

                  (xi) Each Selling Unitholder shall have furnished to you an
executed copy of the Custody Agreement delivered by such Selling Unitholder to
the Custodian.

                  (xii) The Partnership and the Selling Unitholders shall have
furnished to you such other documents and certificates as to the accuracy and
completeness of any statement in the Registration Statement and the Final
Prospectus as of the time of purchase as you may reasonably request.

                  (xiii) Each of the Selling Unitholders will at the time of
purchase deliver to you a certificate of the Selling Unitholders to the effect
that the representations and the warranties of such Selling Unitholder as set
forth in this Agreement are true and correct in all material respects as of such
date.

                  (xiv) Between the time of execution of this Agreement and the
time of purchase, there shall not have occurred any downgrading, nor shall any
notice or announcement have been given or made of (i) any intended or potential
downgrading or (ii) any review or possible change that does not indicate an
improvement, in the rating accorded any securities of or guaranteed by the
Partnership or the Intermediate Partnership by any "nationally recognized
statistical rating organization", as that term is defined in Rule 436(g)(2)
under the Act.

            7. Effective Date of Agreement; Termination. This Agreement shall
become effective when the parties hereto have executed and delivered this
Agreement.

            The obligations of the Underwriter hereunder shall be subject to
termination in your absolute discretion, if, since the time of execution of this
Agreement or the respective dates


                                      -27-




as of which information is given in the Registration Statement and the Final
Prospectus, (y) there has been any material adverse and unfavorable change,
financial or otherwise (other than as referred to in the Registration Statement
and the Final Prospectus), in the earnings, business, condition or properties of
the Partnership and the Intermediate Partnership taken as a whole, which would,
in your judgment, make it impracticable to market the Units or, if at any time
prior to the time of purchase, trading in securities on the NYSE, the American
Stock Exchange or the NASDAQ National Market shall have been suspended or
limitations or minimum prices shall have been established on the NYSE, the
American Stock Exchange or the NASDAQ National Market or if a banking moratorium
shall have been declared either by the United States or New York State
authorities, or if the United States shall have declared war in accordance with
its constitutional processes or there shall have occurred any material outbreak
or escalation of hostilities or other national or international calamity or
crisis of such magnitude in its effect on the financial markets of the United
States as, in your judgment, to make it impracticable to market the Units.

            If you elect to terminate this Agreement as provided in this Section
7, the Partnership and the Selling Unitholders shall be notified promptly by
letter or telegram.

            If the sale to the Underwriter of the Units, as contemplated by this
Agreement, is not carried out by the Underwriter for any reason permitted under
this Agreement or if such sale is not carried out because the Partnership or the
Selling Unitholders shall be unable to comply with any of the terms of this
Agreement, the Partnership and the Selling Unitholders shall not be under any
obligation or liability under this Agreement (except to the extent provided in
Sections 4(ii)(c), 5 and 8 hereof), and the Underwriter shall be under no
obligation or liability to the Partnership and the Selling Unitholders under
this Agreement (except to the extent provided in Section 8 hereof).

            8. Indemnity and Contribution.

                  (i) The Partnership agrees to indemnify, defend and hold
harmless the Underwriter, its partners, directors and officers, and any person
who controls the Underwriter within the meaning of Section 15 of the Act or
Section 20 of the Exchange Act, and the successors and assigns of all of the
foregoing persons from and against any loss, damage, expense, liability or claim
(including the reasonable cost of investigation) which, the Underwriter or any
such person may incur under the Act, the Exchange Act, common law or otherwise,
insofar as such loss, damage, expense, liability or claim arises out of or is
based upon any untrue statement or alleged untrue statement of a material fact
contained in the Final Prospectus or in the Registration Statement as originally
filed or in any amendment or supplement thereto, or arises out of or is based
upon any omission or alleged omission to state a material fact required to be
stated therein or necessary to make the statements made therein not misleading,
except insofar as any such loss, damage, expense, liability or claim arises out
of or is based upon any untrue statement or alleged untrue statement of a
material fact contained in and in conformity with information furnished in
writing by the Underwriter to the Partnership expressly for use in such
Registration Statement or such Final Prospectus or arises out of or is based
upon any omission or alleged omission to state a material fact in connection
with such information required to be stated in such Registration Statement or
such Final Prospectus or necessary to make such information not misleading.


                                      -28-



                  (ii) The Selling Unitholders, severally and jointly, agree to
indemnify and hold harmless the Partnership, each member of the Partnership
Policy Committee, each officer of the Partnership who signed the Registration
Statement, the Underwriter, the directors, officers, employees and agents of the
Underwriter and each person who controls the Partnership or the Underwriter
within the meaning of Section 15 of the Act or Section 20 of the Exchange Act to
the same extent as the foregoing indemnity from the Partnership to the
Underwriter but only with respect to any loss, damage, expense, liability or
claim arising out of or based upon any untrue statement or alleged untrue
statement of a material fact contained in and in conformity with information
furnished in writing by or on behalf of any Selling Unitholder for use with
reference to such Selling Unitholder expressly for use in the Registration
Statement or Final Prospectus. The Underwriter and the Partnership acknowledge
that the statements with respect to the Selling Unitholders set forth under the
caption "Principal and Selling Unitholders" in the Final Prospectus constitute
the only information furnished in writing by or on behalf of the Selling
Unitholders for inclusion in the Final Prospectus. Notwithstanding the
foregoing, it is expressly agreed that no Selling Unitholder shall be
responsible, either pursuant to the indemnity and contribution provisions of
this Section 8 or as a result of any breach of this Agreement, for losses,
expenses, liability or claims arising out of or based upon such untrue statement
or omission or allegation thereof based upon information furnished by any party
other than such Selling Unitholder and, in any event, no Selling Unitholder
shall be responsible, either pursuant to the indemnity and contribution
provisions of this Section 8 or as a result of any breach of this Agreement, for
losses, expenses, liability or claims for an amount in excess of the proceeds to
be received by such Selling Unitholder (before deducting expenses) from the sale
of the Units hereunder. This indemnity agreement will be in addition to any
liability which the Selling Unitholder may otherwise have.

            If any action, suit or proceeding (together, a "Proceeding") is
brought against any person in respect of which indemnity may be sought against
the Partnership and/or the Selling Unitholders pursuant to the foregoing
paragraphs (i) and (ii), such person shall promptly notify the Partnership
and/or the Selling Unitholders in writing of the institution of such Proceeding
and the Partnership and/or the Selling Unitholders shall assume the defense of
such Proceeding, including the employment of counsel reasonably satisfactory to
such indemnified party and payment of all fees and expenses; provided, however,
that the omission to so notify the Partnership and/or the Selling Unitholders
shall not relieve the Partnership and/or the Selling Unitholders from any
liability which the Partnership and/or the Selling Unitholders may have to any
such person or otherwise. Such indemnified person shall have the right to employ
its own counsel in any such case, but the fees and expenses of such counsel
shall be at the expense of such person unless the employment of such counsel
shall have been authorized in writing by the Partnership and/or the Selling
Unitholders in connection with the defense of such Proceeding or the Partnership
and/or the Selling Unitholders shall not have, within a reasonable period of
time in light of the circumstances employed counsel to have charge of the
defense of such Proceeding or such indemnified party or parties shall have
reasonably concluded that there may be defenses available to it or them which
are different from, additional to or in conflict with those available to the
Partnership and/or the Selling Unitholders (in which case the Partnership and/or
the Selling Unitholders shall not have the right to direct the defense of such
Proceeding on behalf of the indemnified party or parties but the Partnership
and/or the Selling Unitholders may employ counsel and participate in the defense
thereof but the fees and expenses of such counsel shall be at the expense of the
Partnership and/or the Selling Unitholders), in any of which events the


                                      -29-



reasonable fees and expenses shall be borne by the Partnership and/or the
Selling Unitholders and paid as incurred (it being understood, however, that the
Partnership and/or the Selling Unitholders shall not be liable for the expenses
of more than one separate counsel (in addition to any local counsel) in any one
Proceeding or series of related Proceedings in the same jurisdiction
representing the indemnified parties who are parties to such Proceeding). The
Partnership and/or the Selling Unitholders shall not be liable for any
settlement of any such Proceeding effected without its written consent but if
settled with the written consent of the Partnership and/or the Selling
Unitholders, the Partnership and/or the Selling Unitholders agree to indemnify
and hold harmless any such person from and against any loss or liability by
reason of such settlement. Notwithstanding the foregoing sentence, if at any
time an indemnified party shall have requested an indemnifying party to
reimburse the indemnified party for fees and expenses of counsel as contemplated
by the second sentence of this paragraph, then the indemnifying party agrees
that it shall be liable for any settlement of any Proceeding effected without
its written consent if (i) such settlement is entered into more than 60 business
days after receipt by such indemnifying party of the aforesaid request, (ii)
such indemnifying party shall not have reimbursed the indemnified party in
accordance with such request prior to the date of such settlement and (iii) such
indemnified party shall have given the indemnifying party at least 30 days'
prior notice of its intention to settle. No indemnifying party shall, without
the prior written consent of the indemnified party, effect any settlement of any
pending or threatened Proceeding in respect of which any indemnified party is or
could have been a party and indemnity could have been sought hereunder by such
indemnified party, unless such settlement includes an unconditional release of
such indemnified party from all liability on claims that are the subject matter
of such Proceeding and does not include an admission of fault, culpability or a
failure to act, by or on behalf of such indemnified party.

                  (iii) The Underwriter agrees to indemnify, defend and hold
harmless the Partnership, each member of the Partnership Policy Committee, each
officer of the Partnership who signed the Registration Statement, and each
person who controls the Partnership within the meaning of Section 15 of the Act
or Section 20 of the Exchange Act and the Selling Unitholders, their partners,
members, managers, directors and officers and any person who controls the
Selling Unitholders within the meaning of Section 15 of the Act or Section 20 of
the Exchange Act from and against any loss, damage, expense, liability or claim
(including the reasonable cost of investigation) which, jointly or severally,
the Partnership and the Selling Unitholders or any such person may incur under
the Act, the Exchange Act, common law or otherwise, insofar as such loss,
damage, expense, liability or claim arises out of or is based upon any untrue
statement or alleged untrue statement of a material fact contained in and in
conformity with information furnished in writing by the Underwriter to the
Partnership expressly for use in the Registration Statement, the Final
Prospectus or any amendment or supplement thereto, or arises out of or is based
upon any omission or alleged omission to state a material fact in connection
with such information required to be stated in such Registration Statement,
Final Prospectus or any amendment or supplement thereto or necessary to make
such information not misleading. The Partnership and the Selling Unitholders
acknowledge that the statements set forth in the last paragraph of the cover
page of the Final Prospectus regarding delivery of the Units and under the
heading "Underwriting," (i) the table reflecting the Underwriter's participation
in the offering, (ii) the sentences related to concessions and reallowances and
(iii) the paragraph related to stabilization, syndicate covering transactions
and penalty bids in the


                                      -30-



Final Prospectus constitute the only information furnished in writing by the
Underwriter for inclusion in the Final Prospectus.

                           If any Proceeding is brought against the Partnership
and/or the Selling Unitholders or any such person in respect of which indemnity
may be sought against the Underwriter pursuant to the foregoing paragraph, the
Partnership and/or the Selling Unitholders or such person shall promptly notify
the Underwriter in writing of the institution of such Proceeding and the
Underwriter shall assume the defense of such Proceeding, including the
employment of counsel reasonably satisfactory to such indemnified party and
payment of all fees and expenses, provided, however, that the omission to so
notify the Underwriter shall not relieve the Underwriter from any liability
which the Underwriter may have to the Partnership and/or the Selling Unitholders
or any such person or otherwise. The Partnership and/or the Selling Unitholders
or such person shall have the right to employ its own counsel in any such case,
but the fees and expenses of such counsel shall be at the expense of the
Partnership and/or the Selling Unitholders or such person unless the employment
of such counsel shall have been authorized in writing by the Underwriter in
connection with the defense of such Proceeding or the Underwriter shall not
have, within a reasonable period of time in light of the circumstances, employed
counsel to have charge of the defense of such Proceeding or such indemnified
party or parties shall have reasonably concluded that there may be defenses
available to it or them which are different from or additional to or in conflict
with those available to the Underwriter (in which case the Underwriter shall not
have the right to direct the defense of such Proceeding on behalf of the
indemnified party or parties, but the Underwriter may employ counsel and
participate in the defense thereof but the fees and expenses of such counsel
shall be at the expense of the Underwriter), in any of which events the
reasonable fees and expenses shall be borne by the Underwriter and paid as
incurred (it being understood, however, that the Underwriter shall not be liable
for the expenses of more than one separate counsel (in addition to any local
counsel) in any one Proceeding or series of related Proceedings in the same
jurisdiction representing the indemnified parties who are parties to such
Proceeding). The Underwriter shall not be liable for any settlement of any such
Proceeding effected without the written consent of the Underwriter but if
settled with the written consent of the Underwriter, the Underwriter agrees to
indemnify and hold harmless the Partnership and/or the Selling Unitholders and
any such person from and against any loss or liability by reason of such
settlement. Notwithstanding the foregoing sentence, if at any time an
indemnified party shall have requested an indemnifying party to reimburse the
indemnified party for fees and expenses of counsel as contemplated by the second
sentence of this paragraph, then the indemnifying party agrees that it shall be
liable for any settlement of any Proceeding effected without its written consent
if (i) such settlement is entered into more than 60 business days after receipt
by such indemnifying party of the aforesaid request, (ii) such indemnifying
party shall not have reimbursed the indemnified party in accordance with such
request prior to the date of such settlement and (iii) such indemnified party
shall have given the indemnifying party at least 30 days' prior notice of its
intention to settle. No indemnifying party shall, without the prior written
consent of the indemnified party, effect any settlement of any pending or
threatened Proceeding in respect of which any indemnified party is or could have
been a party and indemnity could have been sought hereunder by such indemnified
party, unless such settlement includes an unconditional release of such
indemnified party from all liability on claims that are the subject matter of
such Proceeding and does not include an admission of fault, culpability or a
failure to act, by or on behalf of such indemnified party.


                                      -31-



                  (iv) If the indemnification provided for in this Section 8 is
unavailable to an indemnified party under subsections (i), (ii) or (iii) of this
Section 8 in respect of any losses, damages, expenses, liabilities or claims
referred to therein, then each applicable indemnifying party, in lieu of
indemnifying such indemnified party, shall contribute to the amount paid or
payable by such indemnified party as a result of such losses, damages, expenses,
liabilities or claims in such proportions such that (i) the Underwriter shall be
responsible for the portion that the total underwriting discounts and
commissions received by the Underwriter bears to the aggregate public offering
price of the Units and (ii) the Partnership and the Selling Unitholders shall be
severally responsible for the balance based on the relative fault of the
Partnership and the Selling Unitholders, which shall be determined by reference
to, among other things, whether the untrue statement or alleged untrue statement
of a material fact or omission or alleged omission relates to information
supplied by the Partnership or the Selling Unitholders and the parties' relative
intent, knowledge, access to information and opportunity to correct or prevent
such statement or omission. The amount paid or payable by a party as a result of
the losses, damages, expenses, liabilities and claims referred to in this
subsection shall be deemed to include any legal or other fees or expenses
reasonably incurred by such party in connection with investigating, preparing to
defend or defending any claim or Proceeding.

                  (v) The Partnership, the Selling Unitholders and the
Underwriter agree that it would not be just and equitable if contribution
pursuant to this Section 8 were determined by pro rata allocation or by any
other method of allocation that does not take account of the equitable
considerations referred to in subsection (iv) above. Notwithstanding the
provisions of this Section 8, the Underwriter shall not be required to
contribute any amount in excess of the amount by which the total price at which
the Units underwritten by the Underwriter and distributed to the public were
offered to the public exceeds the amount of any damage which the Underwriter has
otherwise been required to pay by reason of such untrue statement or alleged
untrue statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Act) shall be
entitled to contribution from any person who was not guilty of such fraudulent
misrepresentation.

                  (vi) The indemnity and contribution agreements contained in
this Section 8 and the covenants, warranties and representations of the
Partnership and the Selling Unitholders contained in this Agreement shall remain
in full force and effect regardless of any investigation made by or on behalf of
the Underwriter, its directors and officers or any person (including each
partner, officer or director of such person) who controls the Underwriter within
the meaning of Section 15 of the Act or Section 20 of the Exchange Act, or by or
on behalf of the Partnership, each member of the Partnership Policy Committee,
each officer of the Partnership who signed the Registration Statement, and each
person who controls the Partnership within the meaning of Section 15 of the Act
or Section 20 of the Exchange Act and the Selling Unitholders, their directors,
members, managers or officers or any person who controls the Selling Unitholders
within the meaning of Section 15 of the Act or Section 20 of the Exchange Act,
and shall survive any termination of this Agreement or the delivery of the
Units. The Partnership, the Selling Unitholders and the Underwriter agree
promptly to notify each other of the commencement of any Proceeding against it
and, in the case of the Partnership and the Selling


                                      -32-



Unitholders, against any member of the Partnership Policy Committee, any officer
of the Partnership who signed the Registration Statement, or any person who
controls the Partnership within the meaning of Section 15 of the Act or Section
20 of the Exchange Act or the Selling Unitholders' officers, members, managers
or directors in connection with the sale of the Units, or in connection with the
Registration Statement or the Final Prospectus.

            9. Notices. Except as otherwise herein provided, all statements,
requests, notices and agreements shall be in writing or by facsimile and, if to
the Underwriter, shall be sufficient in all respects if delivered or sent to UBS
Warburg LLC, 299 Park Avenue, New York, New York 10171-0026, Attention:
Syndicate Department, and, if to the Partnership, shall be sufficient in all
respects if delivered, sent or telefaxed to Janet K. Place at (402) 398-7780 and
confirmed to her at (402) 398-7886, and, if to a Selling Unitholder, shall be
sufficient in all respects if delivered or sent to the address set forth in
Schedule A hereto.

            10. Governing Law; Construction. This Agreement and any claim,
counterclaim or dispute of any kind or nature whatsoever arising out of or in
any way relating to this Agreement ("Claim"), directly or indirectly, shall be
governed by, and construed in accordance with, the laws of the State of New
York. The Section headings in this Agreement have been inserted as a matter of
convenience of reference and are not a part of this Agreement.

            11. Entire Agreement; Amendments and Waivers. This Agreement
constitutes the entire agreement between the parties hereto pertaining to the
subject matter hereof and supersedes all prior agreements, understandings,
negotiations and discussions, whether oral or written, of the parties, and there
are no warranties, representations or other agreements between the parties in
connection with the subject matter hereof except as set forth specifically
herein or contemplated hereby. No supplement, modification or waiver of this
Agreement shall be binding unless executed in writing by the party to be bound
thereby. The failure of a party to exercise any right or remedy shall not be
deemed or constitute a waiver of such right or remedy in the future. No waiver
of any of the provisions of this Agreement shall be deemed or shall constitute a
waiver of any other provision hereof (regardless of whether similar), nor shall
any such waiver constitute a continuing waiver unless otherwise expressly
provided. Each party to this Agreement agrees that (i) no other party to this
Agreement (including its agents and representatives) had made any
representation, warranty, covenant or agreement to or with such party relating
to the transactions contemplated hereby, other than those expressly set forth
herein, and (ii) such party has not relied upon any representation, warranty,
covenant or agreement relating to the transactions contemplated hereby, other
than those referred to in clause (i) above.

            12. Parties at Interest. The Agreement herein set forth has been and
is made solely for the benefit of the Underwriter and the Partnership and the
Selling Unitholders and to the extent provided in Section 8 hereof the
controlling persons, directors and officers referred to in such Section, and
their respective successors, assigns, heirs, personal representatives and
executors and administrators. No other person, partnership, association or
corporation (including a purchaser, as such purchaser, from the Underwriter)
shall acquire or have any right under or by virtue of this Agreement.

            13. Counterparts. This Agreement may be signed by the parties in one
or more counterparts which together shall constitute one and the same agreement
among the parties.

            14. Successors and Assigns. This Agreement shall be binding upon the
Underwriter, the Partnership and the Selling Unitholders and their successors
and assigns and


                                      -33-



any successor or assign of any substantial portion of the Partnership's and any
of the Underwriter's respective businesses and/or assets.

            15. Miscellaneous. UBS Warburg LLC, an indirect, wholly-owned
subsidiary of UBS AG, is not a bank and is separate from any affiliated bank,
including any U.S. branch or agency of UBS Warburg LLC. Because UBS Warburg LLC
is a separately incorporated entity, it is solely responsible for its own
contractual obligations and commitments, including obligations with respect to
sales and purchases of securities. Securities sold, offered or recommended by
UBS Warburg LLC are not deposits, are not insured by the Federal Deposit
Insurance Corporation, are not guaranteed by a branch or agency, and are not
otherwise an obligation or responsibility of a branch or agency.

            If the foregoing is in accordance with your understanding of our
agreement, please sign and return to us the enclosed duplicate hereof, whereupon
this letter and your acceptance shall represent a binding agreement among the
Partnership, the Intermediate Partnership, the Selling Unitholders and the
Underwriter.



                                      -34-



                             Very truly yours,

                             NORTHERN BORDER PARTNERS, L.P.

                             By: /s/ Jerry L. Peters
                                 -----------------------------------------
                             Name: Jerry L. Peters
                                   ---------------------------------------
                             Title: Chief Financial and Accounting Officer
                                    --------------------------------------


                             NORTHERN BORDER INTERMEDIATE
                             Limited Partnership

                             By: /s/ Jerry L. Peters
                                 -----------------------------------------
                             Name: Jerry L. Peters
                                   ---------------------------------------
                             Title: Chief Financial and Accounting Officer
                                    --------------------------------------


                             SELLING UNITHOLDERS:

                             Cub Investment, LLC

                             By:  Haddington Energy Partners LP, Manager
                             By:  Haddington Ventures, L.L.C., General Partner

                             By: /s/ J. Chris Jones
                                 -----------------------------------------
                             Name: J. Chris Jones
                                   ---------------------------------------
                             Title: Managing Director
                                    --------------------------------------


                             HADDINGTON/CHASE ENERGY PARTNERS
                             (Bear Paw) LP

                             By:  Haddington Ventures, L.L.C., General Partner

                             By: /s/ J. Chris Jones
                                 -----------------------------------------
                             Name: J. Chris Jones
                                   ---------------------------------------
                             Title: Managing Director
                                    --------------------------------------






                                      -35-




The foregoing Agreement is hereby
confirmed and accepted as of the
date first above written.

UBS Warburg LLC


By: /s/ Michael Jamieson
    ------------------------------------
Name: Michael Jamieson
      ----------------------------------
Title: Director
       ---------------------------------


By: /s/ James Baker
    ------------------------------------
Name: James Baker
      ----------------------------------
Title: Associate Director
       ---------------------------------






                                      -36-



                                   SCHEDULE A

                                                          NUMBER OF
                                                         UNITS TO BE
SELLING UNITHOLDER:                                         SOLD

Cub Investment, LLC
c/o J.P. Morgan Partners (23A SBIC), LLC
1221 Avenue of the Americas
New York,  NY  10020
Attention:  Mr. Christopher Behrens                        232,657

Haddington/Chase Energy Partners
(Bear Paw) LP
c/o Haddington Ventures, L.L.C.
2603 Augusta, Suite 1130
Houston, Texas  77057
Attention Mr. Chris Jones                                   54,439


    Total                                                  287,096





                                  Schedule A-1