DRAFT 10/02/97

                     1,600,000 Trust Preferred Securities

                              FIB Capital Trust

                   % Cumulative Trust Preferred Securities
           (Liquidation Preference of $25 per Trust Preferred Security)
                    Fully and Unconditionally Guaranteed by

                       First Interstate BancSystem, Inc.

                              UNDERWRITING AGREEMENT

                                                                         , 1997

D. A. DAVIDSON & CO.
 as Representative of the Several Underwriters
c/o D. A. Davidson & Co.
8 Third Street North
Davidson Building
Great Falls, Montana 59401

Ladies and Gentlemen:

         First Interstate BancSystem, Inc., a Montana corporation (the 
"Company"), as Depositor and as guarantor, and its fiduciary subsidiary, FIB 
Capital Trust, a statutory business trust organized under the Delaware 
Business Trust Act (the "Delaware Act") (the "Trust" and, together with the 
Company, the "Offerors"), propose that the Trust issue and sell to the 
several underwriters named in Schedule I hereto (each an "Underwriter" and 
collectively the "Underwriters"), for which you are acting as representative 
(the "Representative"), an aggregate of 1,600,000 of the Trust's _______% 
Cumulative Trust Preferred Securities, with a liquidation preference of $25 
per Trust Preferred Security (the "Trust Preferred Securities"), the terms of 
which are more fully described in the Prospectus (as hereinafter defined). 
The Offerors propose that the Trust issue the Trust Preferred Securities 
pursuant to an Amended and Restated Trust Agreement among Wilmington Trust 
Company, as Delaware Trustee and as Property Trustee, the administrative 
trustees named therein (the "Administrative Trustees") and the Company (the 
"Trust Agreement"). The Trust Preferred Securities will be guaranteed by the 
Company with respect to distributions and payments upon liquidation, 
redemption and otherwise (the "Guarantee") pursuant to a Guarantee Agreement 
(the "Guarantee Agreement"), to be dated ____________, 1997, between the 
Company and Wilmington Trust Company, as Guarantee Trustee (the "Guarantee 
Trustee"), and entitled to the benefits of certain backup undertakings 
described in the Prospectus with respect to the Company's agreement pursuant 
to the Expense



Agreement (as defined herein) to pay all expenses relating to administration 
of the Trust.

         The proceeds of the sale of the Trust Preferred Securities and the 
common securities of the Trust (liquidation amount $25.00 per common security 
(the "Common Securities")) will be used to purchase junior subordinated 
deferrable interest debentures (the "Junior Subordinated Debentures") issued 
by the Company pursuant to an Indenture (the "Indenture"), to be dated 
___________, 1997, between the Company and Wilmington Trust Company, as 
Debenture Trustee (the "Debenture Trustee").

         The Offerors hereby confirm their agreement with respect to the sale 
of the Trust Preferred Securities to the Underwriters.

         As the Representative, you have advised the Offerors (i) that you 
are authorized to enter into this Underwriting Agreement on behalf of the 
Underwriters and (ii) that the Underwriters are willing, acting severally and 
not jointly, to purchase the number of Trust Preferred Securities, 
aggregating 1,600,000 in total, set forth opposite their respective names in 
Schedule I.

         1.   REGISTRATION STATEMENT AND PROSPECTUS.  A registration 
statement on Form S-1 (File Nos. 333-_____) with respect to the Trust 
Preferred Securities, the Guarantee and the Junior Subordinated Debentures, 
including a preliminary form of prospectus, has been prepared by the Offerors 
in conformity with the requirements of the Securities Act of 1933, as amended 
(the "Act"), and the rules and regulations ("Rules and Regulations") of the 
Securities and Exchange Commission (the "Commission") thereunder and the 
Trust Indenture Act of 1939, as amended (the Trust Indenture Act") and the 
rules and regulations thereunder and has been filed with the Commission; and, 
if the Offerors have elected to rely upon Rule 462(b) of the Rules and 
Regulations to increase the size of the offering registered under the Act, 
the Offerors will prepare and file with the Commission a registration 
statement with respect to such increase pursuant to Rule 462(b).  Copies of 
such registration statement(s) and amendments and each related preliminary 
prospectus have been delivered to the Underwriters.

         If the Offerors have elected not to rely upon Rule 430A of the Rules 
and Regulations, the Offerors have prepared and will promptly file an 
amendment to the registration statement and an amended prospectus (including 
a term sheet meeting the requirements of Rule 434 of the Rules and 
Regulations) if necessary to complete the Prospectus.  If the Offerors have 
elected to rely upon Rule 430A of the Rules and Regulations, they will 
prepare and file a prospectus (or a term sheet meeting the requirements of 
Rule 434) pursuant to Rule 424(b) that discloses the information previously 
omitted from the prospectus in reliance upon Rule 430A.  Such registration 
statement, as amended at the time it is or was declared effective by


                                      -2-



the Commission, and, in the event of any amendment thereto after the 
effective date and prior to the Closing Date (as hereinafter defined), such 
registration statement as so amended (but only from and after the 
effectiveness of such amendment), including a registration statement (if any) 
filed pursuant to Rule 462(b) of the Rules and Regulations increasing the 
size of the offering registered under the Act and information (if any) deemed 
to be part of the registration statement at the time of effectiveness 
pursuant to Rules 430A(b) and 434(d) of the Rules and Regulations, is 
hereinafter called the "Registration Statement".  The prospectus included in 
the Registration Statement at the time it is or was declared effective by the 
Commission and any related prospectus supplement or supplements specifically 
relating to the Trust Preferred Securities, the Guarantee and the Junior 
Subordinated Debentures as filed with or promptly hereafter filed with the 
Commission pursuant to Rule 424(b) under the Act, is hereinafter called the 
"Prospectus", except that if any prospectus (including any term sheet meeting 
the requirements of Rule 434 of the Rules and Regulations provided by the 
Offerors for use with a prospectus subject to completion within the meaning 
of Rule 434 in order to meet the requirements of Section 10(a) of the Rules 
and Regulations) filed by the Offerors with the Commission pursuant to Rule 
424(b) (and Rule 434, if applicable) of the Rules and Regulations or any 
other such prospectus provided to the Underwriters by the Offerors for use in 
connection with the offering of the Trust Preferred Securities (whether or 
not required to be filed by the Offerors with the Commission pursuant to Rule 
424(b) of the Rules and Regulations) differs from the prospectus on file at 
the time the Registration Statement is or was declared effective by the 
Commission, the term "Prospectus" shall refer to such differing prospectus 
(including any term sheet within the meaning of Rule 434 of the Rules and 
Regulations) from and after the time such prospectus is filed with the 
Commission or transmitted to the Commission for filing pursuant to such Rule 
424(b) (and Rule 434, if applicable) or from and after the time it is first 
provided to the Underwriters by the Offerors for such use.  The term 
"Preliminary Prospectus" as used herein means the preliminary prospectus 
included in any Registration Statement prior to the time it becomes or became 
effective under the Act and any prospectus subject to completion as described 
in Rule 430A or 434 of the Rules and Regulations.

            2.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

            (a)  The Offerors represent and warrant to, and agree with, each of 
the Underwriters as follows:

            (i)  No order preventing or suspending the use of any Preliminary 
     Prospectus has been issued by the Commission nor have any proceedings 
     been instituted or, to the best of the Company's knowledge, threatened 
     for that purpose.  Each Preliminary Prospectus, at the time of filing 
     thereof, did 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,

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     in the light of the circumstances under which they were made, not 
     misleading; except that the foregoing shall not apply to statements in 
     or omissions from the Preliminary Prospectus in reliance upon, and in 
     conformity with, written information furnished to the Company by the 
     Representative on behalf of any Underwriter for use in the preparation 
     thereof.

           (ii)  As of the time the Registration Statement is or was declared 
     effective by the Commission, upon the filing or first delivery to the 
     Underwriters of the Prospectus and at the Closing Date (as hereinafter 
     defined), (A) the Registration Statement and Prospectus conformed or 
     will conform in all material respects to the requirements of the Act and 
     the Rules and Regulations and the Registration Statement and Prospectus 
     conformed or will conform in all material respects to the requirements 
     of the Trust Indenture Act and the rules and regulations thereunder, (B) 
     the Registration Statement did not or will not include 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 (C) the Prospectus did not or will not include 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 
     light of the circumstances in which they are or were made, not 
     misleading; except that the foregoing shall not apply to (i) statements 
     in or omissions from any such document in reliance upon, and in 
     conformity with, written information furnished to the Offerors by the 
     Representative on behalf of any Underwriter specifically for use in the 
     preparation thereof and (ii) that part of the Registration Statement 
     which constitutes the Statement of Eligibility and Qualification ("Form 
     T-1") under the Trust Indenture Act. If the Registration Statement has 
     been declared effective by the Commission, no stop order suspending the 
     effectiveness of the Registration Statement has been issued, and no 
     proceeding for that purpose has been initiated or, to the Offeror's 
     knowledge, threatened by the Commission.

          (iii)  The documents of the Company incorporated by reference in 
     the Registration Statement and the Prospectus, when they were filed with 
     the Commission, conformed in all material respects to the requirements 
     of the Exchange Act and the rules and regulations of the Commission 
     thereunder, and none of such documents contained an 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; and any further documents so filed and incorporated by 
     reference in the Registration Statement and the Prospectus, when such 
     documents are filed with the Commission will conform in all material 
     respects to the requirements of the Exchange Act and the rules and 
     regulations of the Commission thereunder, and will not contain an untrue 
     statement of a material fact or omit to state a material fact

                                      -4-



     required to be stated therein or necessary to make the statements 
     therein in light of the circumstances under which they were made, not 
     misleading; except that the foregoing shall not apply to statements in 
     or omissions from any such document in reliance upon, and in conformity 
     with, written information furnished to the Offerors by the 
     Representative on behalf of any Underwriter specifically for use in the 
     preparation thereof.

           (iv)  The consolidated financial statements of the Company and its 
     subsidiaries, together with the notes thereto, contained in or 
     incorporated by reference in the Registration Statement, Preliminary 
     Prospectus and Prospectus comply in all material respects with the 
     requirements of the Act, the Rules and Regulations and the Exchange Act 
     and fairly present the financial position of the Company and its 
     consolidated subsidiaries as of the dates indicated and the results of 
     operations and changes in financial position for the periods therein 
     specified; said consolidated financial statements have been prepared in 
     conformity with generally accepted accounting principles consistently 
     applied throughout the periods involved (except as otherwise stated in 
     the Registration Statement and Prospectus); and the supporting schedules 
     incorporated by reference in the Registration Statements present fairly 
     the information required to be stated therein. No other financial 
     statements or schedules are required to be included or incorporated by 
     reference in the Registration Statement or the Prospectus. The financial 
     information included in the Preliminary Prospectus and Prospectus under 
     the caption "Summary Consolidated Financial Data and Other Information" 
     presents fairly the information purported to be shown therein at the 
     dates and for the periods indicated.

            (v)  The Company has been duly organized and is validly existing 
     as a corporation under the laws of the State of Montana, is duly 
     registered as a bank holding company under the Bank Holding Company Act 
     of 1956, as amended, is registered as a savings and loan holding company 
     under Section 10 of the Home Owners' Loan Act, as amended, and is 
     qualified to do business and is in good standing as a foreign 
     corporation in each jurisdiction in which the ownership or leasing of 
     properties or the conduct of its business requires such qualification, 
     except where failure to be so qualified would not have a material 
     adverse effect upon the Company's business, condition (financial or 
     otherwise) or properties.  Each subsidiary of the Company, has been duly 
     incorporated or organized and is in good standing under the laws of its 
     jurisdiction of incorporation or organization and is qualified to do 
     business and is in good standing as a foreign corporation in each 
     jurisdiction in which the ownership or leasing of properties or the 
     conduct of its business requires such qualification, except where 
     failure to be so qualified would not have a material adverse effect upon 
     the business, condition (financial or otherwise) or properties of the 
     Company and its subsidiaries, taken as a whole.  The 


                                      -5-



     Company and its subsidiaries have all requisite power and authority 
     (corporate and other) to own its properties and conduct its business as 
     it is currently being carried on and as described in the Prospectus.  
     The Company owns all of the outstanding capital stock of the Company's 
     subsidiaries, free of any liens, claims charges or encumbrances. The 
     accounts of each subsidiary are insured by the Bank Insurance Fund of 
     the Federal Deposit Insurance Corporation (the "FDIC") up to the maximum 
     applicable amount in accordance with the rules and regulations of the 
     FDIC, and no proceedings for the termination or revocation of such 
     membership or insurance are pending, or, to the knowledge of the 
     Company, threatened.

           (vi)  KPMG Peat Marwick LLP, who certified the financial 
     statements and supporting schedules included or incorporated by 
     reference in the Registration Statement and the Prospectus, are 
     independent public accountants as required by the Act and the Rules and 
     Regulations.

          (vii)  The Trust has been duly created and is validly existing in 
     good standing as a business trust under the Delaware Act with full trust 
     power and authority to own property and to conduct its business as 
     described in the Registration Statement and Prospectus and to enter into 
     and perform its obligations under this Agreement, the Trust Preferred 
     Securities, the Common Securities and the Trust Agreement and is 
     authorized to do business in each jurisdiction in which such 
     qualification is required, except where the failure to so qualify would 
     not have a material adverse effect on the Company's condition (financial 
     or otherwise), earnings, business, prospects, assets, results of 
     operations or properties taken as a whole; the Trust has conducted and 
     will conduct no business other than the transactions contemplated by the 
     Trust Agreement and described in the Prospectus; the Trust is not a 
     party to or otherwise bound by any agreement other than those described 
     in the Prospectus; the Trust is and will be classified for United States 
     federal income tax purposes as a grantor trust and not as an association 
     taxable as a corporation; and the Trust is and will be treated as a 
     consolidated subsidiary of the Company pursuant to generally accepted 
     accounting principles.

         (viii)  Since the respective dates as of which information is given 
     in the Registration Statement and the Prospectus, and except as 
     otherwise disclosed therein or in the documents incorporated therein by 
     reference, (i) there has been no material adverse change in the 
     condition (financial or otherwise) of the Company, the Trust or its or 
     their subsidiaries, or in the financial results, business affairs or 
     business prospects of the Trust, the Company or its subsidiaries, 
     whether or not arising in the ordinary course of business, (ii) there 
     have been no transactions entered into by the Company, its subsidiaries 
     or the Trust which would materially affect the Company, the

                                      -6-



     subsidiaries or the Trust, (iii) there has been no dividend or 
     distribution of any kind declared, paid or made by the Company on any 
     class of its capital stock or on any class of capital stock of a 
     subsidiary, except regular quarterly cash dividends declared by the 
     Board of Directors of the Company and paid by the Company in the 
     ordinary course of business in accordance with the dividend policy 
     established by the Board of Directors, (iv) neither the Company, the 
     Trust nor any subsidiary has incurred, other than in the ordinary course 
     of business, any material liabilities or obligations, direct or 
     contingent, and (v) there has not been (A) any change in the capital 
     stock of the Company or any subsidiary (except for options granted (or 
     the exercise thereof) pursuant to or shares of Common Stock issued 
     pursuant to the employee benefit plans of, or as compensation to the 
     directors of, the Company described in the documents incorporated by 
     reference in the Registration Statement), or any issuance of options, 
     warrants, convertible securities or other rights to purchase capital 
     stock of the Company or any subsidiary, or (B) any material increase in 
     the short-term or long-term debt (including capitalized lease 
     obligations) of the Company or any subsidiary, except indebtedness and 
     deposit liabilities incurred by the Bank in the ordinary course of its 
     banking business.  Neither the Trust, the Company nor any of its 
     subsidiaries has any material contingent liabilities which are not 
     disclosed in the Prospectus or in the Registration Statement or in the 
     documents incorporated therein by reference.

           (ix)  Except as set forth in the Registration Statement, the 
     Preliminary Prospectus and the Prospectus or in the documents 
     incorporated therein by reference, there is not pending or, to the 
     knowledge of the Trust or the Company, threatened or contemplated, any 
     action, suit or proceeding to which the Trust, the Company or any 
     subsidiary of the Company is a party or to which either of their assets 
     may be subject, before or by any court or governmental agency, authority 
     or body, domestic or foreign, or any arbitrator, the disposition of 
     which could reasonably be expected to result in any material adverse 
     change in the condition (financial or otherwise) of the Trust, the 
     Company or its subsidiaries, taken as a whole, or in the financial 
     results, business affairs or business prospects of the Trust or the 
     Company and its subsidiaries, taken as a whole or the disposition of 
     which would materially and adversely affect the consummation of this 
     Agreement.

            (x)  There are no contracts or documents of the Trust, the 
     Company or any subsidiary of the Company that are required to be filed 
     or incorporated by reference as exhibits to the Registration Statement 
     by the Act or by the Rules and Regulations which contracts or documents 
     have not been so filed or incorporated by reference as required.



                                      -7-



           (xi)  The execution, delivery and performance by the Company 
     and/or the Trust, as the case may be, of this Agreement, the Indenture, 
     the Trust Agreement, the Guarantee Agreement and the Expense Agreement 
     and the consummation of the transactions contemplated hereby and 
     thereby, including the issuance, sale and delivery of the Trust 
     Preferred Securities by the Trust and the Junior Subordinated Debentures 
     by the Company, will not (A) result in a breach or violation of any of 
     the terms and provisions of, or constitute a default (or an event which 
     with notice or lapse of time, or both, would constitute a default) 
     under, or result in the creation or imposition of any lien, charge or 
     encumbrance upon any property or assets of the Trust, the Company or any 
     of its subsidiaries pursuant to the terms of, any indenture, mortgage, 
     loan agreement, note, lease or other material agreement, instrument, 
     franchise, license or permit to which the Trust, the Company or any of 
     its subsidiaries is a party or by which any of such companies or their 
     respective properties or assets may be bound, or (B) violate any 
     judgment, decree, order, statute, rule or regulation of any court or any 
     public, governmental or regulatory agency or body having jurisdiction 
     over the Trust, the Company or any of its subsidiaries or any of their 
     respective properties or assets, which breaches, violations, defaults or 
     liens in the case of clause (A) and (B) would, in the aggregate, have a 
     material adverse effect on the Trust, the Company and its subsidiaries, 
     taken as a whole, and will not violate or conflict with any provision of 
     the articles of incorporation, charter, bylaws or other governing 
     documents of the Company or any of its subsidiaries or the Trust's Trust 
     Agreement or its certificate of trust filed with the state of Delaware 
     on ____________, 1997 (the "Certificate of Trust").  No consent, 
     approval, authorization, order or decree of any court or governmental or 
     regulatory agency or body having jurisdiction over the Trust, the 
     Company or any of their respective properties or assets is required for 
     the execution, delivery and performance of this Agreement, the 
     Indenture, the Trust Agreement, the Guarantee Agreement and the Expense 
     Agreement and the consummation of the transactions contemplated hereby 
     and thereby, except as may be required under state securities or Blue 
     Sky laws.   Each of the Indenture, the Trust Agreement and the Guarantee 
     Agreement conform in all material respects to the descriptions thereof 
     contained in the Prospectus.

          (xii)  This Agreement has been duly and validly authorized, 
     executed and delivered by the Company and the Trust and is a valid and 
     binding obligation of the Company and the Trust, enforceable against the 
     Company and the Trust in accordance with its terms, except as 
     enforceability thereof may be limited by bankruptcy, insolvency, 
     reorganization or similar laws relating to or affecting the rights of 
     creditors generally and by equitable principles and except as 
     obligations of the Company and the Trust under the indemnification 
     provisions hereof may be limited under federal or state securities laws.


                                      -8-



         (xiii)  Each of the Company and the Trust has all requisite 
     corporate power and authority to execute, deliver and perform its 
     obligations under the Indenture, the Trust Agreement, the Guarantee 
     Agreement and the Expense Agreement.  All necessary corporate 
     proceedings of the Company and the Trust have been duly taken to 
     authorize the execution, delivery and performance by each of the Company 
     and the Trust of the Indenture, the Trust Agreement, the Guarantee 
     Agreement and the Expense Agreement, as the case may be.  The Indenture, 
     the Trust Agreement, the Guarantee Agreement and the Expense Agreement 
     have been duly authorized, and when executed and delivered by the 
     Company and/or the Trust, as the case may be, will be a valid and 
     binding obligation of the Company and/or the Trust, as the case may be, 
     enforceable against the Company and/or the Trust, as the case may be, in 
     accordance with its terms, except as enforceability thereof may be 
     limited by bankruptcy, insolvency, reorganization or similar laws 
     relating to or affecting the rights of creditors generally and by 
     equitable principles. 

          (xiv)  The authorized capital stock of the Company is as set forth 
     under the caption "Capitalization" in the Prospectus.  All of the 
     outstanding shares of capital stock have been duly authorized, validly 
     issued and are fully paid and nonassessable.  Neither the filing of the 
     Registration Statement nor the offering or sale of the Trust Preferred 
     Securities or the Junior Subordinated Debentures, as contemplated by 
     this Agreement, gives rise to any rights, other than those which have 
     been waived or satisfied, for or relating to the registration of any 
     shares of capital stock or other securities of the Company.  All of the 
     issued and outstanding shares of capital stock of each subsidiary of the 
     Company have been duly authorized, validly issued and are fully paid and 
     nonassessable.

           (xv)  The Junior Subordinated Debentures have been duly authorized 
     by the Company and at the Closing Date will have been duly executed by 
     the Company and, when authenticated in the manner provided for in the 
     Indenture and delivered against payment therefor as described in the 
     Prospectus, will constitute valid and binding obligations of the 
     Company, enforceable against the Company in accordance with their terms 
     except to the extent that enforcement thereof may be limited by 
     bankruptcy, insolvency, reorganization or similar laws affecting the 
     rights of creditors generally and subject to general principles of 
     equity, will be in the form contemplated by, and entitled to the 
     benefits of, the Indenture and will conform in all material respects to 
     the statements relating thereto in the Prospectus.

          (xvi)  The Common Securities have been duly authorized by the Trust 
     Agreement and, when issued and delivered by the Trust to the Company


                                      -9-



     against payment therefor as described in the Registration Statement and 
     Prospectus, will be validly issued and (subject to the terms of the 
     Trust Agreement) fully paid and nonassessable undivided beneficial 
     interests in the assets of the Trust and will conform to all statements 
     relating thereto contained in the Prospectus; the issuance of the Common 
     Securities is not subject to preemptive or other similar rights; and at 
     the Closing Date all of the issued and outstanding Common Securities of 
     the Trust will be directly owned by the Company free and clear of any 
     security interest, mortgage, pledge, lien, encumbrance, claim or equity.

         (xvii)  The Trust Preferred Securities have been duly authorized by 
     the Trust Agreement and, when issued and delivered pursuant to this 
     Agreement against payment of the consideration set forth herein, will be 
     validly issued and fully paid and nonassessable undivided beneficial 
     interests in the Trust, will be entitled to the benefits of the Trust 
     Agreement and will in all material respects conform to the statements 
     relating thereto contained in the Prospectus; the issuance of the Trust 
     Preferred Securities is not subject to preemptive or other similar 
     rights; and holders of Trust Preferred Securities will be entitled to 
     the same limitation of personal liability under Delaware law as extended 
     to stockholders of private corporations for profit.

        (xviii)  The Indenture, the Trust Agreement, the Guarantee Agreement 
     and the Expense Agreement are in substantially the respective forms 
     filed as exhibits to the Registration Statement.

          (xix)  The Company's obligations under the Guarantee are 
     subordinated and junior in right of payment to all "Senior and 
     Subordinated Debt" (as defined in the Indenture) of the Company.

           (xx)  The Junior Subordinated Debentures are subordinate and 
     junior in right of payment to all "Senior and Subordinated Debt" of the 
     Company.

          (xxi)  Each of the Administrative Trustees of the Trust is an 
     employee of the Company and has been duly authorized by the Company to 
     execute and deliver the Trust Agreement.

         (xxii)  Neither the Company, the Trust nor any subsidiary of the 
     Company is in violation of any law, ordinance, governmental rule or 
     regulation or court decree to which it is subject nor has it failed to 
     obtain any license, certificate, permit, franchise or other governmental 
     authorization, registration, acceptance or approval necessary to the 
     ownership, leasing or operation of its property or to the conduct of its 
     business as it is currently being carried on and as described in the 
     Preliminary Prospectus or the Prospectus, which violation or failure to 
     obtain would have a material

                                      -10-



     adverse effect on the condition (financial or otherwise) of the Company 
     and its subsidiaries, or on the financial results, business affairs or 
     business prospects of the Company and its subsidiaries, taken as a 
     whole.

         (xxiii) Neither the Company nor any subsidiary of the Company is in 
     violation of its respective articles of incorporation, charter or bylaws 
     or other governing documents; the Trust is not in violation of its Trust 
     Agreement or its Certificate of Trust or other governing documents; none 
     of the Company, the Trust or any subsidiary of the Company is in 
     violation or default of any material obligation, agreement, covenant or 
     condition contained in any contract, license, indenture, mortgage, loan 
     agreement, note, lease or other agreement or instrument to which the 
     Company, the Trust or any such subsidiary is a party or by which it is 
     bound, or to which any of the property or assets of the Company, the 
     Trust or any such subsidiary is subject, where any such default, breach 
     or violation would have, individually or in the aggregate, a material 
     adverse effect on the Company and its subsidiaries, taken as a whole, or 
     on the performance of this Agreement, the Indenture, the Trust 
     Agreement, the Guarantee Agreement, the Expense Agreement, the Junior 
     Subordinated Debentures or the Trust Preferred Securities.

          (xxiv) The Company and its subsidiaries have good title to all 
     properties owned by them that are material to the Company and its 
     subsidiaries, taken as a whole, in each case free and clear of all 
     liens, encumbrances and defects, except (i) as do not materially 
     interfere with the use made of such properties, (ii) referred to in the 
     Registration Statement, the Preliminary Prospectus and the Prospectus 
     (including the notes to the financial statements included or 
     incorporated by reference therein and the documents incorporated by 
     reference therein), or (iii) as could not reasonably be expected, singly 
     or in the aggregate, to have a material adverse effect on the business, 
     results of operations or condition (financial or otherwise) of the 
     Company and the subsidiaries, taken as a whole.  The property held under 
     lease by the Company and its subsidiaries is held by them under valid, 
     subsisting and enforceable leases with only such exceptions with respect 
     to any particular lease as do not interfere in any material respect with 
     the conduct of the business of the Company or any subsidiary; each of 
     Company and its subsidiaries owns or possesses all patents, patent 
     applications, trademarks, service marks, trade names, trademark 
     registrations, service mark registrations, copyrights, licenses, 
     inventions, trade secrets and rights necessary for the conduct of the 
     business of the Company and its subsidiaries as currently carried on and 
     as described in the Registration Statement and Prospectus; except as 
     stated in the Registration Statement and Prospectus, to the best of the 
     Company's knowledge, no name which the Company or any subsidiary uses 
     and no other aspect of the business of the Company or any subsidiary 
     will involve or give rise to any infringement of, or license or 

                                      -11-



     similar fees for, any patents, patent applications, trademarks, service 
     marks, trade names, trademark registrations, service mark registrations, 
     copyrights, licenses, inventions, trade secrets or other similar rights 
     of others material to the business or prospects of the Company and its 
     subsidiaries, taken as a whole, and neither the Company nor any 
     subsidiary has received any notice alleging any such infringement or fee.

           (xxv) The Company maintains insurance of the type and in the 
     amounts generally deemed adequate for its business and consistent with 
     insurance maintained by similar companies in similar businesses.

          (xxvi) Each of the Trust and the Company has filed all federal, 
     state, local and foreign income and franchise tax returns required to be 
     filed and are not in default in the payment of any taxes which were 
     payable pursuant to said returns or any assessments with respect 
     thereto, other than any which the Company or any of its subsidiaries or 
     the Trust is contesting in good faith.

         (xxvii) The Company, the Trust and each the subsidiaries of the 
     Company have all necessary consents, approvals, authorizations, orders, 
     registrations, qualifications, licenses and permits of and from all 
     public, regulatory or governmental agencies and bodies, material to the 
     ownership of their respective properties and conduct of their respective 
     businesses as now being conducted and as described in the Registration 
     Statement and the Prospectus, and no such consent, approval, 
     authorization, order, registration, qualification, license or permit 
     contains a materially burdensome restriction not adequately disclosed in 
     the Registration Statement and the Prospectus.  The conduct of the 
     business of the Company, the Trust and each of the subsidiaries is in 
     compliance in all material respects with all applicable federal, state, 
     local and foreign laws and regulations, except where failure to be so in 
     compliance would not materially adversely affect the condition, business 
     or results of operation of the Company, the Trust and the subsidiaries 
     taken as a whole. 

        (xxviii) The Offerors have not distributed and will not distribute 
     any prospectus or other offering material in connection with the 
     offering and sale of the Trust Preferred Securities and the Common Stock 
     other than any Preliminary Prospectus or the Prospectus or other 
     materials permitted by the Act to be distributed by the Offerors.

          (xxix) None of the Trust, the Company or any subsidiary is an 
     "investment company" or a company "controlled" by an "investment 
     company" within the meaning of the Investment Company Act of 1940, as 
     amended, or an "investment adviser" within the meaning of the Investment 
     Advisers Act of 1940, as amended.


                                      -12-



           (xxx) Neither the Company, the Trust nor any of its officers, 
     directors (as defined in the Rules and Regulations) has taken or will 
     take, directly or indirectly, prior to the termination of the offering 
     contemplated by this Agreement, any action designed to stabilize or 
     manipulate the price of any security of the Company or the Trust, or 
     which has caused or resulted in, or which might in the future reasonably 
     be expected to cause or result in, stabilization or manipulation of the 
     price of any security of the Company or the Trust, to facilitate the 
     sale or resale of any of the Trust Preferred Securities.

          (xxxi) Neither of the Offerors nor any of their affiliates is 
     presently doing business with the government of Cuba or with any person 
     or affiliate located in Cuba.

         (xxxii) Each of the Company and its subsidiaries maintains a system 
     of internal accounting controls sufficient to provide reasonable 
     assurances 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.

        (xxxiii) Other than as contemplated by this Agreement or described in 
     the Registration Statement, the Company has not incurred any liability 
     for any finder's or broker's fee or agent's commission in connection 
     with the execution and delivery of this Agreement or the consummation of 
     the transactions contemplated hereby.

         (xxxiv) No report or application filed by the Company or any 
     subsidiary with the FRB, the Office of Thrift Supervision (the "OTS"), 
     [NAME OF MONTANA REGULATOR], the FDIC or other regulatory authority 
     having jurisdiction over it (each such report or application, together 
     with all exhibits thereto, a "Regulatory Report"), as of the date it was 
     filed, contained an 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 when made or failed to comply with 
     the applicable requirements of the FRB, the OTS, [NAME OF MONTANA 
     REGULATOR], the FDIC or such other regulatory authority (the "Banking 
     Regulators"), as the case may be. The Company and each subsidiary has 
     filed each Regulatory Report that it was required to file with any 
     Banking Regulator.


                                      -13-



           (xxxv) The proceeds from the sale of the Trust Preferred Securities 
     will constitute "tier 1" capital (as defined in 12 C.F.R. Part 325) to 
     the maximum extent permitted by rules of the FRB.

          (xxxvi) Each of the subsidiaries has properly administered, in all 
     respects material and which could reasonably be expected to be material 
     to the business, operations or financial condition of the Company and 
     its subsidiaries, taken as a whole, all accounts for which it acts as a 
     fiduciary, including but not limited to accounts for which it serves as 
     a trustee, agent, custodian, personal representative, guardian, 
     conservator or investment advisor, in accordance with the terms of the 
     governing documents and applicable state and federal law and regulation 
     and common law. Neither of the subsidiaries nor any director, officer or 
     employee of either subsidiary has committed any breach of trust with 
     respect to any such fiduciary account which is material to or could 
     reasonably be expected to be material to the general affairs, condition 
     (financial or otherwise), business, key personnel, property, prospects, 
     net worth or results of operations of the Company and its subsidiaries, 
     taken as a whole, and the accountings for each such fiduciary account 
     are true and correct in all material respects and accurately reflect the 
     assets of such fiduciary account in all material respects.

         (xxxvii) The conditions for use of Form S-1, as set forth in the 
     General Instructions thereto, have been satisfied.

        (xxxviii) Each of the Company and its subsidiaries is in compliance in 
     all material respects with all presently applicable provisions of the 
     Employee Retirement Income Security Act of 1974, as amended, including 
     the regulations and published interpretations thereunder ("ERISA"); no 
     "reportable event" (as defined in ERISA) has occurred with respect to 
     any "pension plan" (as defined in ERISA) which could have a material 
     adverse effect on the general affairs, management, financial position, 
     stockholders' equity or results of operations of the Company and its 
     subsidiaries for which the Company or any subsidiary would have any 
     liability; neither the Company nor any subsidiary has incurred or 
     expects to incur liability under (i) Title IV of ERISA with respect to 
     termination of, or withdrawal from, any "pension plan" or (ii) Sections 
     412 or 4971 of the Internal Revenue Code of 1986, as amended, including 
     the regulations and published interpretations thereunder (the "Code"), 
     in each case which could have a material adverse effect on the general 
     affairs, management, financial position, stockholders' equity or results 
     of operations of the Company and its subsidiaries, taken as a whole; and 
     each "pension plan" for which the Company or any subsidiary would have 
     any liability that is intended to be qualified under Section 501(a) of 
     the Code is so qualified in all material respects and nothing has 
     occurred, whether by action or by failure to act, which would cause the 
     loss of such

                                      -14-



     qualification, except for such loss as would not have a material adverse 
     effect on the general affairs, management, financial position, 
     stockholders' equity or results of operations of the Company and its 
     subsidiaries, taken as a whole.

         (xxxix) No hazardous substances, hazardous wastes, pollutants or 
     contaminants have been deposited or disposed of in, on or under the 
     properties of the Company or any subsidiary (including properties owned, 
     managed or controlled by a subsidiary in connection with its lending 
     operations) during the period in which the Company or any subsidiary has 
     owned, occupied, managed, controlled or operated such properties in 
     violation of any applicable law, ordinance, rule, regulation, order, 
     judgment, decree or permit or which would require remedial action under 
     any applicable law, ordinance, rule, regulation, order, judgment, decree 
     or permit, except for any violation or remedial action which would not 
     have, or could not be reasonably likely to have, singularly or in the 
     aggregate with all such violations or remedial actions, a material 
     adverse effect on the general affairs, condition (financial or 
     otherwise), business, key personnel, property, prospects, net worth or 
     results of operations of the Company and its subsidiaries, taken as a 
     whole.

         (b)  Any certificate signed by any officer of the Company or a trustee
of the Trust and delivered to the Representative or to counsel for the
Underwriters shall be deemed a representation and warranty by the Company to
each Underwriter as to the matters covered thereby.

            3.   PURCHASE, SALE AND DELIVERY OF TRUST PREFERRED SECURITIES; 
ADVISORY FEE.

            On the basis of the representations, warranties and agreements 
herein contained, but subject to the terms and conditions herein set forth, 
the Trust agrees to issue and sell to each of the Underwriters, and each of 
the Underwriters agrees, severally and not jointly, to purchase from the 
Trust, the respective number of Trust Preferred Securities set forth opposite 
the name of each such Underwriter in Schedule I hereto.  The purchase price 
per Trust Preferred Security shall be $25.00 per share.  As compensation to 
the Underwriters for their commitments hereunder and in view of the fact that 
the proceeds of the sale of the Trust Preferred Securities (together with the 
entire proceeds from the sale by the Trust to the Company of the Common 
Securities) will be used to purchase the Junior Subordinated Debentures, at 
the Closing the Company hereby agrees to pay to the Representative, on behalf 
of the several Underwriters, a commission of $______ per Trust Preferred 
Security ($________ in the aggregate) delivered by the Trust hereunder at the 
Closing Date.

         The Trust Preferred Securities will be delivered by the Company to the
Representative against payment of the purchase price therefor by certified or
official bank check or wire transfer of same day funds payable to the Company at
the offices 


                                       -15-



of D.A. Davidson & Co., 8 Third Street North, Great Falls, Montana 59401, or 
such other location as may be mutually acceptable, at 9:00 a.m. Rocky 
Mountain time on the third (or if the Trust Preferred Securities are priced, 
as contemplated by Rule 15c6-1(c) under the Exchange Act, after 4:30 p.m. 
Eastern time, on the fourth) full business day following the date hereof, or 
at such other time and date as the Representative and the Company determine 
pursuant to Rule 15c6-1(a) under the Exchange Act, such time and date of 
delivery being herein referred to as the "Closing Date."  Delivery of the 
Trust Preferred Securities may be made by credit through full fast transfer 
to the accounts at The Depository Trust Company designated by the 
Representative.  Certificates representing the Trust Preferred Securities, in 
definitive form and in such denominations and registered in such names as the 
Representative may request upon at least two business days' prior notice to 
the Company shall be prepared and will be made available for checking and 
packaging, not later than 10:30 a.m., Rocky Mountain time, on the business 
day next preceding the Closing Date at the offices of D.A. Davidson & Co., 8 
Third Street North, Great Falls, Montana 59401, or such other location as may 
be mutually acceptable.

         Nothing herein contained shall constitute any of the Underwriters an 
unincorporated association or partner with any other Underwriter or with the 
Offerors.

         It is understood that you, on your own behalf and not as 
Representative, may (but shall not be obligated to) make payment on behalf of 
any Underwriter or Underwriters for the Trust Preferred Securities to be 
purchased by such Underwriter or Underwriters.  No such payment by you shall 
relieve such Underwriter or Underwriters from any of its or their other 
obligations hereunder.

     4.   COVENANTS.

          (a)  The Offerors jointly and severally covenant and agree with 
the several Underwriters as follows:

              (i) If the Registration Statement has not already been declared 
     effective by the Commission, the Company will use its best efforts to 
     cause the Registration Statement and any post-effective amendments 
     thereto to become effective as promptly as possible; the Company will 
     notify the Representative promptly, (i) of the time when the 
     Registration Statement or any post-effective amendment to the 
     Registration Statement has become effective, (ii) any supplement to the 
     Prospectus (including any term sheet within the meaning of Rule 434 of 
     the Rules and Regulations) has been filed, (iii) of the receipt of any 
     comments from the Commission, and (iv) of any request by the Commission 
     for any amendment or supplement to the Registration Statement or 
     Prospectus or additional information; if the Company has elected to rely 
     on Rule 430A of the Rules and Regulations, the Company will

                                      -16-



     prepare and file a Prospectus (or term sheet within the meaning of Rule 
     434 of the Rules and Regulations) containing the information omitted 
     therefrom pursuant to Rule 430A of the Rules and Regulations with the 
     Commission within the time period required by, and otherwise in 
     accordance with the provisions of, Rules 424(b), 430A and 434, if 
     applicable, of the Rules and Regulations; if the Company has elected to 
     rely upon Rule 462(b) of the Rules and Regulations to increase the size 
     of the offering registered under the Act, the Company will prepare and 
     file a registration statement with respect to such increase with the 
     Commission within the time period required by, and otherwise in 
     accordance with the provisions of, Rule 462(b); the Offerors will 
     prepare and file with the Commission, promptly upon the Representative's 
     request, any amendments or supplements to the Registration Statement or 
     Prospectus (including any term sheet within the meaning of Rule 434 of 
     the Rules and Regulations) that, in the Representative's reasonable 
     opinion, may be necessary or advisable in connection with the 
     distribution of the Trust Preferred Securities; and the Offerors will 
     not file any amendment or supplement to the Registration Statement or 
     Prospectus (including any term sheet within the meaning of Rule 434 of 
     the Rules and Regulations) to which the Representative shall reasonably 
     object by notice to the Company after having been furnished a copy a 
     reasonable time prior to the filing.

             (ii) The Offerors will advise the Representative, promptly after 
     they shall receive notice or obtain knowledge thereof, of the issuance 
     by the Commission of any stop order suspending the effectiveness of the 
     Registration Statement, of the suspension of the qualification of the 
     Trust Preferred Securities for offering or sale in any jurisdiction, or 
     of the initiation or threatening of any proceeding for any such purpose; 
     and the Offerors will promptly use their best efforts to prevent the 
     issuance of any stop order or to obtain its withdrawal if such a stop 
     order should be issued.

            (iii) Within the time during which a prospectus (including any 
     term sheet within the meaning of Rule 434 of the Rules and Regulations) 
     relating to the Trust Preferred Securities is required to be delivered 
     under the Act, the Offerors will comply as far as they are able with all 
     requirements imposed upon them by the Act, as now and hereafter amended, 
     and by the Rules and Regulations, as from time to time in force, so far 
     as necessary to permit the continuance of sales of or dealings in the 
     Trust Preferred Securities as contemplated by the provisions hereof and 
     the Prospectus.  If during such period any event occurs as a result of 
     which the Prospectus would include an untrue statement of a material 
     fact or omit to state a material fact necessary to make the statements 
     therein, in the light of the circumstances then existing, not 
     misleading, or if during such period it is necessary, in the written 
     opinion of counsel to the Underwriters, to amend the Registration 
     Statement or supplement the Prospectus to comply with the Act, the 
     Offerors will promptly

                                      -17-



     notify the Representative and will amend the Registration Statement or 
     supplement the Prospectus (in form and substance reasonably satisfactory 
     to counsel for the Underwriters and at the expense of the Company) so as 
     to correct such statement or omission or effect such compliance.

             (iv) The Offerors will use their best efforts to qualify the 
     Trust Preferred Securities for offering and sale under the applicable 
     securities laws of such states and other jurisdictions of the United 
     States as you may reasonably designate; provided that no such 
     qualification shall be required in any jurisdiction where, as a result 
     thereof, the Offerors would become subject to service of general process 
     or to qualification to do business as a foreign corporation.  In each 
     jurisdiction in which the Trust Preferred Securities have been so 
     qualified, the Offerors will file such statements and reports as may be 
     required to be filed by it by the laws of such jurisdiction to continue 
     such qualification in effect for a period of not less than one year from 
     the effective date of the Registration Statement.

              (v) The Offerors will furnish to the Underwriters copies of the 
     Registration Statement as originally filed (including all exhibits filed 
     therewith), a conformed copy of the Registration Statement as originally 
     filed and of each amendment thereto (without exhibits), each of the 
     Preliminary Prospectuses, the Prospectus, and all amendments and 
     supplements (including any term sheet within the meaning of Rule 434 of 
     the Rules and Regulations) to such documents, in each case as soon as 
     available and in such quantities as the Representative may from time to 
     time reasonably request.

             (vi) For a period of five years commencing with the date hereof, 
     the Company will furnish to the Representative copies of all annual 
     reports, quarterly reports and current reports filed by the Company with 
     the Commission on Forms 10-K, 10-Q and 8-K, or such other similar forms 
     as may be designated by the Commission, and of such other documents, 
     proxy statements, reports and information as are furnished by the 
     Company to its stockholders generally.

            (vii) The Company will make generally available to its security 
     holders and holders of the Trust Preferred Securities as soon as 
     practicable, but in any event not later than 18 months after the 
     "effective date of the Registration Statement" (as defined in Rule 
     158(c) of the Rules and Regulations), an earnings statement (which need 
     not be audited) complying with Section 11(a) of the Act and the Rules 
     and Regulations (including at the option of the Company Rule 158).

           (viii) The Company, whether or not the transactions contemplated 
     hereunder are consummated or this Agreement is prevented from becoming

                                      -18-



     effective under the provisions of Section 8(a) hereof or is terminated, 
     will pay or cause to be paid all costs and expenses incident to the 
     performance of the obligations of each Offeror hereunder, including, 
     without limitation, (A) all expenses (including transfer taxes allocated 
     to the respective transferees) incurred in connection with the issuance, 
     transfer and delivery of the Trust Preferred Securities, (B) all 
     expenses and fees (including, without limitation, fees and expenses of 
     each Offeror's accountants and counsel but, except as otherwise provided 
     below, not including fees of the Underwriters' counsel) in connection 
     with the preparation printing, filing, delivery, and shipping of the 
     Registration Statement, the Trust Preferred Securities, each Preliminary 
     Prospectus, the Prospectus, and the printing, delivery, and shipping of 
     this Agreement and other underwriting documents, including Blue Sky 
     Memoranda and any legal investment survey requested by the 
     Representative, and the Indenture, (C) all filing fees and fees and 
     disbursements of the Underwriters' counsel incurred in connection with 
     the qualification of the Trust Preferred Securities for offering and 
     sale by the Underwriters or by dealers under the securities or blue sky 
     laws of the states and other jurisdictions which the Representative 
     shall designate, (D) the fees and expenses of any transfer agent or 
     registrar, (E) the filing fees incident to any required review by the 
     National Association of Securities Dealers, Inc. ("NASD") of the terms 
     of the sale of the Securities, (F) listing fees, if any, (G) the fees 
     and expenses of the Debenture Trustee, including the fees and 
     disbursements of counsel for the Debenture Trustee in connection with 
     the Indenture and Junior Subordinated Debentures, (H) the fees and 
     expenses of the Property Trustee, including the fees and disbursements 
     of counsel for the Property Trustee in connection with the Trust 
     Agreement and the Certificate of Trust, (I) rating agency fees, if any, 
     and (J) all other costs and expenses incident to the performance of the 
     Offerors' obligations hereunder that are not otherwise specifically 
     provided for herein.  If the sale of the Trust Preferred Securities 
     provided for herein is not consummated by reason of action by either 
     Offeror pursuant to Section 8(a) hereof which prevents this Agreement 
     from becoming effective, or by reason of any failure, refusal or 
     inability on the part of either Offeror to perform any agreement on its 
     part to be performed, or because any other condition of the 
     Underwriters' obligations hereunder required to be fulfilled by either 
     Offeror is not fulfilled (and such non-fulfillment is not due to the 
     Underwriters' actions or omissions), the Company will reimburse the 
     Underwriters for all out-of-pocket disbursements (including, without 
     limitation, reasonable fees and disbursements of counsel for the 
     Underwriters) incurred by the Underwriters in connection with their 
     investigation, preparing to market and marketing the Trust Preferred 
     Securities or in contemplation of performing their obligations 
     hereunder. Neither Offeror shall in any event be liable to any 
     Underwriter for loss of anticipated profits from the transactions 
     covered by this Agreement.


                                      -19-



             (ix) The Offerors will apply the net proceeds from the sale of 
     the Trust Preferred Securities and the Common Securities to be sold by 
     the Trust, and the Company will apply the proceeds from the sale of the 
     Junior Subordinated Debentures, for the purposes set forth in the 
     Prospectus under the caption "Use of Proceeds."

              (x) The Offerors have not taken and will not take, directly or 
     indirectly, any action designed to or which might reasonably be expected 
     to cause or result in, or which has constituted, the stabilization or 
     manipulation of the price of any security of either Offeror to 
     facilitate the sale or resale of the Trust Preferred Securities, and has 
     not effected any sales of Common Stock which are required to be 
     disclosed in response to Item 701 of Regulation S-K under the Act which 
     have not been so disclosed in the Registration Statement.

             (xi) Neither Offeror will incur any liability for any finder's 
     or broker's fee or agent's commission in connection with the execution 
     and delivery of this Agreement or the consummation of the transactions 
     contemplated hereby.

            (xii) The Offerors will inform the Florida Department of Banking 
     and Finance at any time prior to the consummation of the distribution of 
     the Trust Preferred Securities by the Underwriters if either of them 
     commence engaging in business with the government of Cuba or with any 
     person or affiliate located in Cuba.  Such information will be provided 
     within 90 days after the commencement thereof or after a change occurs 
     with respect to previously reported information.

            (xii) The Offerors will not claim the benefit of any usury laws 
     against any holder of the Trust Preferred Securities.

     5.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS.  The obligations of the 
Underwriters hereunder are subject to the accuracy, as of the date hereof and 
at the Closing Date (as if made at the Closing Date), of and compliance with 
all representations, warranties and agreements of the Offerors contained 
herein, to the performance by each Offeror of its obligations hereunder and 
to the following additional conditions:

         (a)  The Registration Statement shall have become effective not 
later than 5:00 p.m., Rocky Mountain time, on the date of this Agreement, or 
such later time and date as the Underwriters shall approve and all filings 
required by Rules 424, 430A and 434 of the Rules and Regulations shall have 
been timely made; no stop order suspending the effectiveness of the 
Registration Statement or any 


                                     -20-                                      



amendment thereof shall have been issued and no proceedings for the issuance 
of such an order shall have been initiated or threatened; and any request of 
the Commission for additional information (to be included in the Registration 
Statement or the Prospectus or otherwise) shall have been complied with to 
the Representative's reasonable satisfaction.

         (b)  The Representative shall not have advised the Company or the 
Trust that the Registration Statement or the Prospectus, or any amendment 
thereof or supplement thereto (including any term sheet within the meaning of 
Rule 434 of the Rules and Regulations), contains an untrue statement of fact 
which, in the Representative's reasonable opinion, is material, or omits to 
state a fact which, in the Representative's reasonable opinion, is material 
and is required to be stated therein or necessary to make the statements 
therein not misleading, and such misstatement or omission has not been 
corrected.

         (c)  Except as contemplated in the Prospectus or the Registration 
Statement, subsequent to the respective dates as of which information is 
given in the Registration Statement and the Prospectus, none of the Trust, 
the Company or any subsidiary of the Company shall have incurred any material 
liabilities or obligations, direct or contingent, or entered into any 
material transactions, or declared or paid any dividends or made any 
distribution of any kind with respect to its capital stock, except regular 
quarterly cash dividends declared by the Board of Directors of the Company 
and paid by the Company in the ordinary course of business in accordance with 
the dividend policy established by the Board of Directors; and there shall 
not have been any change in the capital stock (except for options granted (or 
the exercise thereof) pursuant to or shares of Common Stock issued pursuant 
to any employee benefit plan of, or as compensation to the directors as 
discussed in the Registration Statement or the Prospectus), or any material 
change in the short-term or long-term debt, including capitalized lease 
obligations (except such increases as are incurred in the ordinary course of 
business and are not material to the condition, financial or otherwise, of 
the Company and its subsidiaries considered as a whole), of the Company or 
its subsidiaries, or any issuance of options, warrants, convertible 
securities or other rights to purchase the capital stock of the Company or 
any of its subsidiaries (except for securities granted pursuant to the 
Company's employee benefit plans), or any material adverse change in 
condition (financial or otherwise), financial results, business affairs or 
business prospects of the Trust or the Company and its subsidiaries, taken as 
a whole, that, in the Representative's judgment, makes it impractical or 
inadvisable to offer or deliver the Trust Preferred Securities on the terms 
and in the manner contemplated in the Prospectus.

         (d)  On the Closing Date, there shall have been furnished to the 
Representative the opinion of Holland & Hart LLP, counsel for the Company, 
dated the Closing Date and addressed to the Underwriters, to the effect that:

                                      -21-



            (i)  Each of the Company and its subsidiaries has been duly 
     organized and is validly existing as a corporation in good standing 
     under the laws of its jurisdiction of incorporation or organization.  
     The Company is duly registered as a bank holding company under the Bank 
     Holding Company Act of 1956, as amended and as a savings and loan 
     holding company under Section 10 of the Home Owner's Act, as amended 
     ("HOLA").  Each of the Company and its subsidiaries has the corporate 
     power and authority to own its properties and conduct its business as 
     currently being carried on and as described in the Registration 
     Statement and Prospectus, and is duly qualified to do business as a 
     foreign corporation and is in good standing in each jurisdiction in 
     which its ownership or lease of property or the conduct of its business 
     makes such qualification necessary and in which the failure to so 
     qualify would have a material adverse effect upon the business, 
     condition (financial or otherwise) or properties of the Company and its 
     subsidiaries, taken as a whole.

           (ii)  All of the issued and outstanding shares of the capital 
     stock of the Company is set forth in the Prospectus under the caption 
     "Capitalization" and have been duly authorized and validly issued and 
     are fully paid and nonassessable. 

          (iii)  All of the issued and outstanding shares of capital stock of 
     each subsidiary have been duly and validly authorized and issued and are 
     fully paid and nonassessable.  All of such shares of the subsidiaries 
     are owned by the Company free and clear of all perfected liens and, to 
     the best of such counsel's knowledge, other liens, encumbrances, 
     equities, claims, security interests, voting trusts or other defects of 
     title whatsoever.

           (iv)  All of the issued and outstanding Common Securities of the  
     Trust are owned by the Company, free and clear of any security interest, 
     mortgage, pledge, lien, encumbrance, claim or equitable right.

            (v)  The statements in the Prospectus under the caption 
     "Description of the Trust Preferred Securities", "Description of Junior 
     Subordinated Debentures", "Description of Guarantee", "Relationship 
     Among the Trust Preferred Securities, the Junior Subordinated Debentures 
     and the Guarantee", and "Description of First Interstate Capital Stock," 
     insofar as such statements constitute matters of law applicable to the 
     Offerors or summaries of documents, fairly present the information 
     required to be included therein in all material respects.

           (vi)  Each of the Trust Agreement, the Indenture and the Guarantee 
     Agreement has been duly qualified under the Trust Indenture Act.


                                      -22-



          (vii)  The Junior Subordinated Debentures are in the form 
     contemplated by the Indenture, have been duly authorized, executed and 
     delivered by the Company and, when authenticated by the Debenture 
     Trustee in the manner provided for in the Indenture and delivered 
     against payment therefor, will constitute valid and binding obligations 
     of the Company, enforceable against the Company in accordance with their 
     terms, except to the extent that enforcement thereof may be limited by 
     bankruptcy, insolvency, reorganization or similar laws affecting the 
     rights of creditors generally and subject to general principles of 
     equity.

         (viii)  The Junior Subordinated Debentures are subordinate and 
     junior in right of payment to all Senior and Subordinated Debt (as 
     defined in the Indenture) of the Company.

           (ix)  Neither the Company nor the Trust is an "investment company" 
     or a company "controlled" by an "investment company" within the meaning 
     of the 1940 Act.

            (x)  The statements set forth in the Prospectus under the caption 
     "Certain Federal Income Tax Consequences" constitute an accurate summary 
     of the matters addressed therein, based upon current law and the 
     assumptions stated or referred to therein.

           (xi)  Under current law, the Trust will be classified for United 
     States federal income tax purposes as a grantor trust and not as an 
     association taxable as a corporation; accordingly, for United States 
     federal income tax purposes each beneficial owner of Trust Preferred 
     Securities will be treated as owning an undivided beneficial interest in 
     the Junior Subordinated Debentures, and stated interest on the Junior 
     Subordinated Debentures generally will be included in income by a holder 
     of Trust Preferred Securities at the time such interest income is paid 
     or accrued in accordance with such holder's regular method of tax 
     accounting.

          (xii)  For federal income tax purposes, (a) the Junior Subordinated 
     Debentures will constitute indebtedness of the Company and (b) the 
     interest on the Junior Subordinated Debentures will be deductible by the 
     Company on an economic accrual basis in accordance with Section 163(e) 
     of the Internal Revenue Code of 1986, as amended, and Treasury 
     Regulation Section 1.163-7.

         (xiii)  To the actual knowledge of such counsel, the Trust is not 
     required to be authorized to do business in any other jurisdiction and 
     the Trust is not a party to or otherwise bound by any agreement other 
     than those described in the Prospectus.


                                      -23-



          (xiv)  The Trust Agreement has been duly authorized, executed and 
     delivered by the Company and the Administrative Trustees.

           (xv)  The Registration Statement has become effective under the 
     Act and, to the actual knowledge of such counsel, no stop order 
     suspending the effectiveness of the Registration Statement has been 
     issued and no proceeding for that purpose has been instituted or 
     threatened by the Commission.  The Prospectus has been filed in the 
     manner and within the time period required by Rule 424(b) of the Act.

          (xvi)  The descriptions in the Registration Statement and 
     Prospectus of statutes, legal and governmental proceedings or rulings, 
     contracts and other documents are accurate in all material respects and 
     fairly present the information required to be shown; and such counsel 
     does not know of any statutes or legal or governmental proceedings 
     required to be described in the Prospectus that are not described as 
     required, or of any contracts or documents of a character required to be 
     described in the Registration Statement or Prospectus or included as 
     exhibits to the Registration Statement that are not described or 
     included as required.

         (xvii)  To the actual knowledge of such counsel, there is no action, 
     suit or proceeding before or by any federal court or federal 
     governmental agency or body, domestic or foreign, or any arbitrator, now 
     pending or threatened in writing against or affecting the Company, the 
     Trust or any subsidiary which is required to be disclosed in the 
     Registration Statement (other than as disclosed therein or in documents 
     incorporated by reference therein), and other than those which 
     individually or in the aggregate would not have a material adverse 
     effect on the Company and its subsidiaries, taken as a whole, or which 
     would not materially and adversely affect the consummation of this 
     Agreement.

         (xviii) To the best of such counsel's knowledge, no holders of 
     securities of the Company have rights which have not been waived to the 
     registration of shares of common stock of the Company or other 
     securities, because of the filing of the Registration Statement by the 
     Company or the offering contemplated hereby.

          (xix)  The documents incorporated by reference in the Registration 
     Statement and the Prospectus (other than the financial statements, notes 
     to the financial statements, other financial data, statistical data and 
     related schedules therein, as to which such counsel need express no 
     opinion), when they were filed with the Commission, complied as to form 
     in all material

                                      -24-



     respects with the requirements of the Exchange Act and the Rules and 
     Regulations.

           (xx)  The Company has full corporate power and authority and the 
     Trust has full trust power and authority to enter into this Agreement, 
     the Indenture, the Trust Agreement, the Guarantee Agreement and the 
     Expense Agreement to which it is a party and to issue the Junior 
     Subordinated Debentures and Trust Preferred Securities, as the case may 
     be, and to effect the transactions contemplated by this Agreement, the 
     Indenture, the Trust Agreement, the Guarantee Agreement and the Expense 
     Agreement to which it is a party. This Agreement has been duly 
     authorized, executed and delivered by the Company, and each of the 
     Indenture, the Trust Agreement, the Guarantee Agreement and the Expense 
     Agreement has been duly authorized, executed and delivered by the 
     Company and constitutes a valid, legal and binding obligation of the 
     Company enforceable in accordance with its terms (except as rights to 
     indemnity hereunder may be limited by federal or state securities laws 
     and except as such enforceability may be limited by bankruptcy, 
     insolvency, reorganization or similar laws affecting the rights of 
     creditors generally and subject to general principles of equity).  The 
     execution, delivery and performance of this Agreement, the Indenture, 
     the Trust Agreement, the Guarantee Agreement, the Trust Preferred 
     Securities, the Common Securities, the Junior Subordinated Debentures 
     and the Guarantee and the consummation of the transactions herein or 
     therein contemplated will not result in a breach or violation of any of 
     the terms and provisions of, or constitute a default under, (A) any 
     statute, rule or regulation of the United States or the State of 
     Montana, or any rule or regulation of any Banking Regulator, or (B) any 
     agreement or instrument know to such counsel to which the Company or the 
     Trust is a party or by which either is bound or to which any of their 
     property is subject which agreement or instrument is material to the 
     Company and its subsidiaries, taken as a whole, or (C) the charter or 
     bylaws of the Company or any subsidiary, or the Trust's Certificate, or 
     (D) any order or decree known to such counsel of any court, governmental 
     agency or body or Banking Regulator having jurisdiction over the 
     Company, any subsidiary or the Trust or any of its respective 
     properties, except for any breach, violation or default which would not 
     have a material adverse effect on the Company and its subsidiaries, 
     taken as a whole, or the ability of the Company or the Trust to perform 
     its obligations hereunder; and no consent, approval, authorization or 
     order of, or filing with, any court or governmental agency or body is 
     required for the execution, delivery and performance of this Agreement, 
     the Indenture, the Trust Agreement, the Guarantee Agreement, the Expense 
     Agreement, the Trust Preferred Securities, the Junior Subordinated 
     Debentures, or the Guarantee or for the consummation of the transactions 
     contemplated hereby or thereby, including the issuance or sale of the 
     Junior Subordinated Debentures by the Company and the Common

                                      -25-



     Securities and Trust Preferred Securities by the Trust, except (a) such 
     as may be required under the Act, which has been obtained, or under 
     state securities or blue sky laws, and (b) the qualification of the 
     Trust Agreement, the Guarantee Agreement and the Indenture under the 
     Trust Indenture Act and the rules and regulations thereunder.

          (xxi)  The Registration Statement and the Prospectus, and any 
     amendment thereof or supplement thereto (including any term sheet within 
     the meaning of Rule 434 of the Rules and Regulations), comply as to form 
     in all material respects with the requirements of the Act and the Rules 
     and Regulations.

         Such counsel shall also include a statement to the effect that on 
the basis of conferences with officers of the Company, examination of 
documents referred to in the Registration Statement and Prospectus and such 
other procedures as such counsel deemed appropriate, nothing has come to the 
attention of such counsel that causes such counsel to believe that the 
Registration Statement or any amendment thereof, at the time such 
Registration Statement became effective and as of the Closing Date (including 
any Registration Statement filed under Rule 462(b) of the Rules and 
Regulations), contained any untrue statement of a material fact or omitted to 
state any material fact required to be stated therein or necessary to make 
the statements therein not misleading or that the Prospectus (as of their 
respective dates and as of the Closing Date), as amended or supplemented, 
includes any untrue statement of material fact or omits to state a material 
fact necessary to make the statements therein, in light of the circumstances 
under which they were made, not misleading; it being understood that such 
counsel need express no opinion as to the financial statements or other 
financial data included in any of the documents mentioned in this clause.

         In rendering such opinion such counsel may rely (i) as to matters of 
law other than Montana and federal law, upon the opinion or opinions of local 
counsel provided that the extent of such reliance is specified in such 
opinion and that such counsel shall state that such opinion or opinions of 
local counsel are satisfactory to them and that they believe they and the 
Underwriters are justified in relying thereon and (ii) as to matters of fact, 
to the extent such counsel deems reasonable upon certificates of officers of 
the Company and its subsidiaries and of public officials provided that the 
extent of such reliance is specified in such opinion.

         (e)  On the Closing Date, there shall have been furnished to the 
Representative the favorable opinion, dated as of Closing Date, of Richards, 
Layton & Finger, counsel to Wilmington Trust Company, as Property Trustee 
under the Trust Agreement, Debenture Trustee under the Indenture, and 
Guarantee Trustee under the Guarantee Agreement, in form and substance 
satisfactory to counsel for the Underwriters, to the effect that:


                                      -26-



            (i)  Wilmington Trust Company is duly incorporated and is validly 
     existing in good standing as a banking corporation under the laws of the 
     State of Delaware.

           (ii)  Wilmington Trust Company has the power and authority to 
     execute, deliver and perform its obligations under the Trust Agreement, 
     the Indenture and the Guarantee Agreement.

          (iii)  Each of the Trust Agreement, the Indenture and the Guarantee 
     Agreement have been duly authorized, executed and delivered by 
     Wilmington Trust Company and constitutes a legal, valid and binding 
     obligation of Wilmington Trust Company, enforceable against Wilmington 
     Trust Company, in accordance with its terms.

           (iv)  The execution, delivery and performance by Wilmington Trust 
     Company of the Trust Agreement, the Indenture and the Guarantee 
     Agreement do not conflict with or constitute a breach of the charter or 
     by-laws of Wilmington Trust Company.

            (v)  No consent, approval or authorization of, or registration 
     with or notice to, any governmental authority or agency of the State of 
     Delaware or the United States of America governing the banking or trust 
     powers of Wilmington Trust Company is required for the execution, 
     delivery or performance by Wilmington Trust Company of the Trust 
     Agreement, the Indenture and the Guarantee Agreement.

         (f)  On the Closing Date, there shall have been furnished to the
Representative the favorable opinion, dated as of Closing Date, of Richards,
Layton & Finger, as special Delaware counsel for the Offerors, in form and
substance satisfactory to counsel for the Underwriters, to the effect that:

            (i)  The Trust has been duly created and is validly existing in 
     good standing as a business trust under the Delaware Act, and all 
     filings required as of the date hereof under the Delaware Act with 
     respect to the creation and valid existence of the Trust as a business 
     trust have been made.

           (ii)  Under the Trust Agreement and the Delaware Act, the Trust 
     has the trust power and authority to own property and to conduct its 
     business, all as described in the Prospectus.

          (iii)  The Trust Agreement constitutes a valid and binding 
     obligation of the Company and each of the Property Trustee, the Delaware 
     Trustee and the Administrative Trustees, and is enforceable against the 
     Company and 

                                      -27-



     each of the Property Trustee, the Delaware Trustee and the 
     Administrative Trustees, in accordance with its terms.

           (iv)  Under the Trust Agreement and the Delaware Act, the Trust 
     has the trust power and authority (i) to execute and deliver, and to 
     perform its obligations under, this Agreement, and (ii) to issue, and to 
     perform its obligations under, the Trust Preferred Securities and the 
     Common Securities.

            (v)  Under the Trust Agreement and the Delaware Act, the 
     execution and delivery by the Trust of this Agreement, and the 
     performance by the Trust of its obligations under this Agreement, have 
     been duly authorized by all necessary trust action on the part of the 
     Trust.

           (vi)  Under the Delaware Act, the certificate attached to the 
     Trust Agreement as Exhibit E is an appropriate form of certificate to 
     evidence ownership of the Trust Preferred Securities.  The Trust 
     Preferred Securities and the Common Securities have been duly authorized 
     by the Trust Agreement and are duly and validly issued and, subject to 
     the qualifications hereinafter expressed in this paragraph (vi), the 
     Trust Preferred Securities are fully paid and non-assessable undivided 
     beneficial interests in the assets of the Trust.  The respective holders 
     of the Trust Preferred Securities, as beneficial owners of the Trust, 
     will be entitled to the same limitation of personal liability extended 
     to stockholders of private corporations for profit organized under the 
     General Corporation Law of the State of Delaware.  We note that the 
     respective holders of the Trust Preferred Securities and the Common 
     Securities may be obligated, pursuant to the Trust Agreement, to make 
     certain payments under the Trust Agreement.

          (vii)  Under the Trust Agreement and the Delaware Act, the issuance 
     of the Trust Preferred Securities and the Common Securities is not 
     subject to preemptive or similar rights.

         (viii)  The issuance and sale by the Trust of the Trust Preferred 
     Securities and the Common Securities, the purchase by the Trust of the 
     Junior Subordinated Debentures, the execution, delivery and performance 
     by the Trust of this Agreement and the Guarantee Agreement, the 
     consummation by the Trust of the transactions contemplated by this 
     Agreement and compliance by the Trust with its obligations under this 
     Agreement do not violate (a) any of the provisions of the Certificate of 
     Trust or the Trust Agreement, or (b) any applicable Delaware law or 
     Delaware administrative regulation.

         (g)  On the Closing Date, there shall have been furnished such opinion
or opinions from Dorsey & Whitney LLP, counsel for the Underwriters,


                                      -28-



dated the Closing Date and addressed to the Underwriters, with respect to the 
formation of the Company, the validity of the Trust Preferred Securities, the 
Indenture, the Guarantee Agreement, this Agreement, the Registration 
Statement, the Prospectus and other related matters as the Underwriters may 
reasonably request, and such counsel shall have received such papers and 
information as they request to enable them to pass upon such matters.

         (h)  On the Closing Date the Representative shall have received a 
letter from KPMG Peat Marwick LLP, independent certified public accountants, 
dated the Closing Date and addressed to the Underwriters, in form and 
substance satisfactory to the Representative, confirming that they are 
independent public accountants within the meaning of the Act and the Rules 
and Regulations and are in compliance with the applicable requirements 
relating to the qualifications of accountants under Rule 241 of Regulation 
S-X of the Commission, and stating, as of the date of such letter (or, with 
respect to matters involving changes or developments since the respective 
dates as of which specified financial information is given in the Prospectus, 
as of a date not more than five days prior to the date of such letter), the 
conclusions and findings of each said firm with respect to the financial 
information and other matters covered by its letter delivered to the 
Representative concurrently with the execution of this Agreement, and the 
effect of the letter so to be delivered on the Closing Date shall be to 
confirm the conclusions and findings set forth in such prior letter.

         (i)  On the Closing Date, there shall have been furnished to the 
Representative, a certificate, dated the Closing Date and addressed to the 
Underwriters, signed by the President or the Chief Executive Officer and by a 
Vice President, Secretary and Treasurer of the Company, to the effect that:

            (i)  The representations and warranties of the Company in this 
     Agreement are true and correct, in all material respects, as if made at 
     and as of the Closing Date, and the Offerors have complied with all the 
     agreements and satisfied all the conditions on its part to be performed 
     or satisfied at or prior to the Closing Date;

           (ii)  No stop order or other order suspending the effectiveness of 
     the Registration Statement or any amendment thereof or the qualification 
     of the Trust Preferred Securities for offering or sale has been issued, 
     and no proceeding for that purpose has been instituted or, to the best 
     of their knowledge, is contemplated by the Commission or any state or 
     regulatory body: and

          (iii)  The signers of said certificate have carefully examined the 
     Registration Statement and the Prospectus, and (A) such documents 
     contain all statements and information required to be included therein, 
     the

                                      -29-



     Registration Statement, or any amendment thereof, does not 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 not misleading, and the Prospectus does not include any untrue 
     statement of material fact or omit to state a material fact necessary to 
     make the statements therein, in light of the circumstances under which 
     they were made, not misleading, (B) since the effective date of the 
     Registration Statement, there has occurred no event required to be set 
     forth in an amended or supplemented prospectus which has not been so set 
     forth, (C) subsequent to the respective dates as of which information is 
     given in the Registration Statement and the Prospectus, neither the 
     Trust, the Company nor any of its subsidiaries has incurred any material 
     liabilities or obligations, direct or contingent, or entered into any 
     material transactions, not in the ordinary course of business, or 
     declared or paid any dividends or made any distribution of any kind with 
     respect to its capital stock (except regular quarterly cash dividends 
     declared by the Board of Directors of the Company and paid by the 
     Company in the ordinary course of business in accordance with the 
     dividend policy established by the Board of Directors), and, except as 
     disclosed in the Prospectus, there has not been any change in the 
     capital stock of the Company or any subsidiary (except for options 
     granted (or the exercise thereof) pursuant to or shares of Common Stock 
     issued pursuant to the employee benefit plans of, or as compensation to 
     the directors disclosed in the Registration Statement or Prospectus), or 
     any issuance of options, warrants, convertible securities or other 
     rights to purchase capital stock of the Company or any subsidiary, or 
     any material increase in the short-term or long-term debt (including 
     capitalized lease obligations) of the Company or any subsidiary, or any 
     material adverse change, in condition (financial or otherwise) of the 
     Company and its subsidiaries, taken as a whole, or in the financial 
     results or business affairs of the Company and its subsidiaries, taken 
     as a whole, and the Company has not sustained any material loss or 
     damage to its property or material interference with its business 
     whether or not any of the foregoing is insured, and (D) except as stated 
     in the Registration Statement and the Prospectus, there is not pending, 
     or, to the knowledge of the Company or the Trust, threatened or 
     contemplated, any action, suit or proceeding to which the Trust, the 
     Company or any of its subsidiaries is a party before or by any court or 
     governmental agency, authority or body, or any arbitrator, which might 
     result in any material adverse change in the condition (financial or 
     otherwise) of the Company and its subsidiaries, taken as a whole, or in 
     the financial results or business affairs of the Company and its 
     subsidiaries, taken as a whole.

            (j)  On the Closing Date, there shall have been furnished to the 
     Representative a certificate, dated the Closing Date and addressed to 
     the Underwriters, signed by the Administrative Trustees, to the effect 
     that:


                                      -30-



            (i)  The representations and warranties of the Trust in this 
     Agreement are true and correct, in all material respects, as if made at 
     and as of the Closing Date, and the Trust has complied with all the 
     agreements and satisfied all the conditions on its part to be performed 
     or satisfied at or prior to the Closing Date;

           (ii)  No stop order or other order suspending the effectiveness of 
     the Registration Statement or any amendment thereof or the qualification 
     of the Trust Preferred Securities for offering or sale has been issued, 
     and no proceeding for that purpose has been instituted or, to the best 
     of their knowledge, is contemplated by the Commission or any state or 
     regulatory body; and

          (iii)  The signers of said certificate have carefully examined the 
     Registration Statement and the Prospectus, and any amendments thereof or 
     supplements thereto (including any term sheet within the meaning of Rule 
     434 of the Rules and Regulations), and (a) such documents contain all 
     statements and information required to be included therein, the 
     Registration Statement, or any amendment thereof, does not 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 not misleading, and the Prospectus, as amended or supplemented, 
     does not include any untrue statement of material fact or omit to state 
     a material fact necessary to make the statements therein, in light of 
     the circumstances under which they were made, not misleading, (B) since 
     the effective date of the Registration Statement, there has occurred no 
     event required to be set forth in an amended or supplemented prospectus 
     which has not been so set forth, (C) subsequent to the respective dates 
     as of which information is given in the Registration Statement and the 
     Prospectus, the Trust has not incurred any material liabilities or 
     obligations, direct or contingent, or entered into any material 
     transactions, not in the ordinary course of business, or declared or 
     paid any dividends or made any distribution of any kind with respect to 
     its trust preferred securities, and except as disclosed in the 
     Prospectus, there has not been any change in the trust preferred 
     securities, or any material change in the short-term or long-term debt, 
     or any issuance of options, warrants, convertible securities or other 
     rights to purchase the preferred securities, of the Trust or any 
     material adverse change in the condition (financial or otherwise) of the 
     Trust, or in the financial results or business affairs of the Trust, and 
     the Trust has not sustained any material loss or damage to its property 
     or material interference with its business, whether or not any of the 
     foregoing is insured, and (D) except as stated in the Registration 
     Statement and the Prospectus, there is not pending, or, to the knowledge 
     of the Trust, threatened or contemplated, any action, suit or proceeding 
     to which the Trust is a party before or by any court or governmental 
     agency, authority or body, or 

                                      -31-



     any arbitrator, which might result in any material adverse change in the 
     condition (financial or otherwise), business or results of operations of 
     the Trust.

         (k)  The Company shall have furnished to the Representative and to 
the Underwriters' counsel such additional documents, certificates and 
evidence as the Representative or they may have reasonably requested.

         All such opinions, certificates, letters and other documents will be 
in compliance with the provisions hereof only if they are satisfactory in 
form and substance to the Representative and the Underwriters' counsel.

    6.   INDEMNIFICATION AND CONTRIBUTION.

         (a)  The Offerors agree, jointly and severally, to indemnify and 
hold harmless each Underwriter against any losses, claims, damages, 
liabilities or expenses, joint or several, to which such Underwriter may 
become subject, under the Act or otherwise (including in settlement of any 
litigation if such settlement is effected with the written consent of the 
Company and the Trust), insofar as such losses, claims, damages or 
liabilities (or actions in respect thereof) arise out of or are based upon an 
untrue statement or alleged untrue statement of a material fact contained in 
the Registration Statement, any Preliminary Prospectus, the Prospectus, or 
arise out of or are based upon the omission or alleged omission to state 
therein a material fact required to be stated therein or necessary to make 
the statements therein not misleading, and will reimburse the Underwriters 
for any legal or other expenses reasonably incurred by it in connection with 
investigating or defending against such loss, claim, damage, liability or 
action; provided, however, that the Offerors shall not be liable in any such 
case to the extent that any such loss, claim, damage, liability or action 
arises out of or is based upon an untrue statement or alleged untrue 
statement or omission or alleged omission made in the Registration Statement, 
any Preliminary Prospectus, the Prospectus, in reliance upon and in 
conformity with written information furnished to the Offerors by the 
Representative on behalf of the Underwriters specifically for use in the 
preparation thereof; and provided further that the Offerors shall not be 
liable to any Underwriter under the indemnity agreement in this subsection 
(a) with respect to any Preliminary Prospectus to the extent that any such 
loss, claim, damage or liability of such Underwriter results from the fact 
that such Underwriter sold Trust Preferred Securities to a person to whom 
there was not sent or given, at or prior to the written confirmation of such 
sale, a copy of the Prospectus or a copy of the Prospectus as then amended or 
supplemented in any case where such delivery is required by the Act if the 
Offerors have previously furnished copies thereof to such Underwriter and the 
loss, claim, damage or liability of such Underwriter results from an untrue 
statement or omission of a material fact contained in the Preliminary 
Prospectus or


                                      -32-



the Prospectus, as the case may be, which was corrected in the Prospectus (or 
the Prospectus as amended or supplemented).

         (b)  Each Underwriter agrees, severally but not jointly, to 
indemnify and hold harmless the Company and the Trust against any losses, 
claims, damages or liabilities to which the Company and the Trust may become 
subject, under the Act or otherwise (including in settlement of any 
litigation, if such settlement is effected with the written consent of the 
Underwriters), insofar as such losses, claims, damages or liabilities (or 
actions in respect thereof) arise out of or are based upon an untrue 
statement or alleged untrue statement of a material fact contained in the 
Registration Statement, any Preliminary Prospectus, the Prospectus, or arise 
out of or are based upon the omission or alleged omission to state therein a 
material fact required to be stated therein or necessary to make the 
statements therein not misleading, in each case to the extent, but only to 
the extent, that such untrue statement or alleged untrue statement or 
omission or alleged omission was made in the Registration Statement, any 
Preliminary Prospectus, the Prospectus, in reliance upon and in conformity 
with written information furnished to the Company by the Representative on 
behalf of such Underwriter, specifically for use in the preparation thereof, 
and will reimburse the Company and the Trust for any legal or other expenses 
reasonably incurred by the Company and the Trust in connection with 
investigating or defending against any such loss, claim, damage, liability or 
action.

         (c)  The Company agrees to indemnify the Trust against all loss, 
liability, claim, damage and expense whatsoever, which may become due from 
the Trust under subsection (a).

         (d)  Promptly after receipt by an indemnified party under subsection 
(a) or (b) above of notice of the commencement of any action, such 
indemnified party shall, if a claim in respect thereof is to be made against 
the indemnifying party under such subsection, notify the indemnifying party 
in writing of the commencement thereof; but the omission so to notify the 
indemnifying party shall not relieve the indemnifying party from any 
liability that it may have to any indemnified party.  In case any such action 
shall be brought against any indemnified party, and it shall notify the 
indemnifying party of the commencement thereof, the indemnifying party shall 
be entitled to participate in, and, to the extent that it shall wish, jointly 
with any other indemnifying party similarly notified, to assume the defense 
thereof, with counsel satisfactory to such indemnified party, and after 
notice from the indemnifying party to such indemnified party of the 
indemnifying party's election so to assume the defense thereof, the 
indemnifying party shall not be liable to such indemnified party under such 
subsection for any legal or other expenses subsequently incurred by such 
indemnified party in connection with the defense thereof other than 
reasonable costs of investigation; provided, however, that if, in the sole 
judgment of the indemnified party, it is advisable for the indemnified party 
to be represented by separate counsel other than counsel for the indemnified 
party, 

                                      -33-



the indemnified party shall have the right to employ a single counsel to 
represent the indemnified party, in which event the reasonable fees and 
expenses of such separate counsel shall be borne by the indemnifying party.  
An indemnifying party shall not be obligated under any settlement agreement 
relating to any action under this Section 6 to which it has not agreed in 
writing.

         (e)  If the indemnification provided for in this Section 6 is 
unavailable or insufficient to hold harmless an indemnified party under 
subsection (a) or (b) above, then each indemnifying party shall contribute to 
the amount paid or payable by such indemnified party as a result of the 
losses, claims, damages or liabilities referred to in subsection (a) or (b) 
above, (i) in such proportion as is appropriate to reflect the relative 
benefits received by the Company or the Trust on the one hand and the 
Underwriters on the other from the offering of the Trust Preferred Securities 
or (ii) if the allocation provided by clause (i) above is not permitted by 
applicable law, in such proportion as is appropriate to reflect not only the 
relative benefits referred to in clause (i) above but also the relative fault 
of the Company and the Trust on the one hand and the Underwriters on the 
other in connection with the statements or omissions that resulted in such 
losses, claims, damages or liabilities, as well as any other relevant 
equitable considerations.  The relative benefits received by the Company and 
the Trust on the one hand and the Underwriters on the other shall be deemed 
to be in the same proportion as the total net proceeds from the offering 
(before deducting expenses) received by the Company bear to the total 
underwriting discounts and commissions received by the Underwriters, in each 
case as set forth in the table on the cover page of the Prospectus.  The 
relative fault shall be determined by reference to, among other things, 
whether the untrue or alleged untrue statement of a material fact or the 
omission or alleged omission to state a material fact relates to information 
supplied by the Company, the Trust or the Underwriters and the parties' 
relevant intent, knowledge, access to information and opportunity to correct 
or prevent such untrue statement or omission.  The Company, the Trust and the 
Underwriters agree that it would not be just and equitable if contributions 
pursuant to this subsection (e) were to be determined by pro rata allocation 
or by any other method of allocation which does not take account of the 
equitable considerations referred to in the first sentence of this subsection 
(e).  The amount paid by an indemnified party as a result of the losses, 
claims, damages or liabilities referred to in the first sentence of this 
subsection (e) shall be deemed to include any legal or other expenses 
reasonably incurred by such indemnified party in connection with 
investigating or defending against any action or claim which is the subject 
of this subsection (e).  Notwithstanding the provisions of this subsection 
(e), no Underwriter shall be required to contribute any amount in excess of 
the amount by which the total price at which the Trust Preferred Securities 
underwritten by it and distributed to the public were offered to the public 
exceeds the amount of any damages that the Underwriter has otherwise been 
required to pay by reason of such untrue or alleged untrue statement or 
omission or alleged omission.  No person guilty of fraudulent 

                                      -34-



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.  The Underwriters' obligations in this 
paragraph (d) to contribute are several in proportion to their respective 
underwriting obligations and not joint.

         (f)  The obligations of the Company under this Section 6 shall be in 
addition to any liability which the Company and the Trust may otherwise have 
and shall extend, upon the same terms and conditions, to each person, if any, 
who controls any Underwriter within the meaning of the Act; and the 
obligations of the Underwriters under this Section 6 shall be in addition to 
any liability that the respective Underwriters may otherwise have and shall 
extend, upon the same terms and conditions, to each director of the Company 
(including any person who, with his or her consent, is named in the 
Registration Statement as about to become a director of the Company), to each 
officer of the Company who has signed the Registration Statement and to each 
person, if any, who controls the Company or the Trust within the meaning of 
the Act.

     7.  REPRESENTATIONS AND AGREEMENTS TO SURVIVE DELIVERY.  All 
representations, warranties, and agreements of the Offerors herein or in 
certificates delivered pursuant hereto, and the agreements of the Offerors 
and the Underwriters contained in Section 6 hereof shall remain operative and 
in full force and effect regardless of any investigation made by or on behalf 
of any Underwriter or any controlling person thereof, or the Company or any 
of its officers, directors, or controlling persons or the Trust or any if its 
trustees, or controlling persons and shall survive delivery of, and payment 
for, the Trust Preferred Securities to and by the Underwriters hereunder.

     8.  EFFECTIVE DATE OF THIS AGREEMENT AND TERMINATION.

         (a)  This Agreement shall become effective at 10:00 a.m., Rocky
Mountain time, on the first full business day following the effective date of
the Registration Statement, or at such earlier time after the effective time of
the Registration Statement as the Representative in its discretion shall first
release the Trust Preferred Securities for sale to the public; provided, that if
the Registration Statement is effective at the time this Agreement is executed,
this Agreement shall become effective at such time as the Representative in its
discretion shall first release the Trust Preferred Securities for sale to the
public.  For the purpose of this Section, the Trust Preferred Securities shall
be deemed to have been released for sale to the public upon release by the
Representative of the publication of a newspaper advertisement relating thereto
or upon release by the Representative of telexes offering the Trust Preferred
Securities for sale to securities dealers, whichever shall first occur.  By
giving notice as hereinafter specified before the time this Agreement becomes
effective, the Representative, the Trust or the Company may prevent this


                                      -35-



Agreement from becoming effective without liability of any party to any other 
party, except that the provisions of Section 4(a)(viii) and Section 6 hereof 
shall at all times be effective.

         (b)  The Representative shall have the right to terminate this 
Agreement, by notice  as hereinafter specified, at any time at or prior to 
the Closing Date (i) if there has been, since the date of this Agreement or 
since the respective dates as of which information is given in the 
Registration Statement, any material adverse change in the condition 
(financial or otherwise) of the Company, or in the financial results, 
business affairs or business prospects of the Company, whether or not arising 
in the ordinary course of business, or (ii) if either Offeror shall have 
failed, refused or been unable, at or prior to such Closing Date, to perform 
any agreement on its part to be performed hereunder, or (iii) if any other 
condition of the Underwriters' obligations hereunder required to be fulfilled 
by the Offerors is not fulfilled, or (iv) if there has occurred any material 
adverse change in the financial markets in the United States or any outbreak 
or the escalation of major hostilities involving the United States or the 
declaration by the United States of a national emergency, war, or other 
calamity or crisis, the effect of which is such as to make it, in the 
Representative's reasonable judgment, impracticable or inadvisable to market 
the Trust Preferred Securities or to enforce contracts for the sale of the 
Trust Preferred Securities, or (v) if trading in the Trust Preferred 
Securities has been suspended by the Commission, or if trading generally on 
either the American Stock Exchange or the New York Stock Exchange has been 
suspended, or minimum or maximum prices for trading have been fixed, or 
maximum ranges for prices for securities have been required, by either of 
said Exchanges or by order of the Commission or any other governmental 
authority, or if a banking moratorium has been declared by either Federal or 
Montana authorities. If this Agreement is terminated pursuant to this Section 
8(b), such termination shall be without liability of any party to any other 
party except that the provisions of Section 4(a)(viii) and Section 6 hereof 
shall at all times be effective.

         (c)  If the Representative elect to prevent this Agreement from 
becoming effective or to terminate this Agreement as provided in this 
Section, the Company shall be notified promptly by the Representative by 
telephone or telegram, confirmed by letter.  If the Trust or the Company 
elects to prevent this Agreement from becoming effective, the Representative 
shall be notified by the Trust or the Company by telephone or telegram, 
confirmed by letter.

     9.  DEFAULT BY THE COMPANY.  If the Trust shall fail at the Closing Date 
to sell and deliver the number of Trust Preferred Securities which it is 
obligated to sell hereunder or the Company fails to deliver the number of 
Junior Subordinated Debentures required to be delivered pursuant to the Trust 
Agreement, then this Agreement shall terminate without any liability on the 
part of any non-defaulting 

                                      -36-



party.  No action taken pursuant to this Section shall relieve the Trust or 
the Company so defaulting from liability, if any, in respect of such default.

     10. DEFAULT BY THE UNDERWRITERS

         (a)  If any Underwriter shall default in its obligation to purchase 
the Trust Preferred Securities which it has agreed to purchase hereunder, the 
Representative may in its discretion arrange for it or another party or other 
parties to purchase such Trust Preferred Securities on the terms contained 
herein.  If within thirty-six hours after such default by any Underwriter, 
the Representative does not arrange for the purchase of such Trust Preferred 
Securities, then the Company and the Trust shall be entitled to a further 
period of thirty-six hours within which to procure another party or other 
parties satisfactory to the Representative to purchase such Trust Preferred 
Securities on such terms.  In the event that, within the respective 
prescribed periods, the Representative notifies the Company and the Trust 
that it has so arranged for the purchase of such Trust Preferred Securities, 
or the Company and the Trust notify the Representative that it has so 
arranged for the purchase of such Trust Preferred Securities, the 
Representative or the Company and the Trust shall have the right to postpone 
the Closing Date for a period of not more than seven days, in order to effect 
whatever changes may thereby be made necessary in the Registration Statement 
or the Prospectus, or in any other documents or arrangements, and the Company 
and the Trust agree to file promptly any amendments to the Registration 
Statement or the Prospectus which in the opinion of the Representative may 
thereby be made necessary.  The term "Underwriter" as used in this Agreement 
shall include any person substituted under this Section with like effect as 
if such person had originally been a party to this Agreement with respect to 
such Trust Preferred Securities.

    (b)  If, after giving effect to any arrangements for the purchase of the 
Trust Preferred Securities of a defaulting Underwriter or Underwriters by the 
Representative and the Company and the Trust as provided in subsection (a) 
above, the aggregate principal amount of such Trust Preferred Securities 
which remains unpurchased does not exceed one-eleventh of the aggregate 
principal amount of all the Trust Preferred Securities to be purchased, then 
the Company and the Trust shall have the right to require the non-defaulting 
Underwriters to purchase the number of Trust Preferred Securities which such 
Underwriter agreed to purchase hereunder and, in addition, to require the 
non-defaulting Underwriters to purchase its pro rata share (based on the 
aggregate principal amount of Trust Preferred Securities which such 
Underwriter agreed to purchase hereunder) of the Trust Preferred Securities 
of such defaulting Underwriter or Underwriters for which such arrangements 
have not been made; but nothing herein shall relieve the defaulting 
Underwriter from liability for its default.


                                      -37-



    (c)  If, after giving effect to any arrangements for the purchase of the 
Trust Preferred Securities of a defaulting Underwriter or Underwriters by the 
Representative and the Company and the Trust as provided in subsection (a) 
above, the aggregate principal amount of such Trust Preferred Securities 
which remains unpurchased exceeds one-eleventh of the aggregate principal 
amount of all the Trust Preferred Securities to be purchased, or if the 
Company and the Trust shall not exercise the right described in subsection 
(b) above to require non-defaulting Underwriters to purchase Trust Preferred 
Securities of the defaulting Underwriter or Underwriters, then this Agreement 
shall thereupon terminate, without liability on the part of any 
non-defaulting Underwriter or the Company or the Trust, except for the 
expenses to be borne by the Company and the Underwriters as provided in 
Section 4(a)(viii) hereof and the indemnity and contribution agreements in 
Section 6 hereof; but nothing herein shall relieve a defaulting Underwriter 
from liability for its default.

     11. INFORMATION FURNISHED BY UNDERWRITERS.  The statements set forth in 
the last paragraph of the cover page and under the caption "Underwriting" in 
any Preliminary Prospectus and in the Prospectus constitute the written 
information furnished by the Representative on behalf of the Underwriters 
referred to in Section 2 and Section 6 hereof.

     12. NOTICES.  Except as otherwise provided herein, all communications 
hereunder shall be in writing or by telegraph and, if to the Underwriters, 
shall be mailed, telegraphed or delivered to the Underwriters, c/o D. A. 
Davidson & Co., 8 Third Street North, Great Falls, Montana 59401, Attention:  
Syndicate Department; if to the Company, shall be mailed, telegraphed or 
delivered to it at First Interstate BancSystem, Inc., 401 North 31st Street, 
Billings, Montana 59116, Attention: Chief Executive Officer; if to the Trust, 
shall be mailed, telegraphed or delivered to it c/o First Interstate 
BancSystem, Inc., 401 North 31st Street, Billings, Montana 59116, Attention: 
Chief Executive Officer.  All notices given by telegram shall be promptly 
confirmed by letter.  Any notice to the Trust shall also be copied to the 
Company at the address previously stated, Attention: Chief Executive Officer. 
Any party to this Agreement may change such address for notices by sending 
to the parties to this Agreement written notice of a new address for such 
purpose.

     13. PERSONS ENTITLED TO BENEFIT OF AGREEMENT.  This Agreement shall 
inure to the benefit of and be binding upon the parties hereto and their 
respective successors and assigns and the controlling persons, officers and 
directors referred to in Section 6.  Nothing in this Agreement is intended or 
shall be construed to give to any other person, firm or corporation any legal 
or equitable remedy or claim under or in respect of this Agreement or any 
provision herein contained.  The term "successors and assigns" as herein used 
shall not include any purchaser, as such purchaser, of any of the Trust 
Preferred Securities from the Underwriters.



                                       -38-



     14. GOVERNING LAW.  This Agreement shall be governed by and construed in
accordance with the laws of the State of Montana.

                           [Signature Page Follows]


























                                      -39-



     Please sign and return to the Company the enclosed duplicates of this 
letter whereupon this letter will become a binding agreement between the 
Company and the Underwriters in accordance with its terms.

                                       Very truly yours,

                                       FIRST INTERSTATE BANCSYSTEM, INC., 


                                       By 
                                          -------------------------------------


                                       FIB CAPITAL TRUST


                                       By 
                                          -------------------------------------


Accepted as of the date hereof.


D. A. DAVIDSON & CO., for itself and as
Representative of the several Underwriters
referred to in this Agreement


By:
    --------------------------------
           Authorized Signatory




                                      -40-



                                   SCHEDULE I


                                                          Total Number of
                                                    Trust Preferred Securities
     Underwriter                                          to be Purchased
     -----------                                    ---------------------------

D. A. Davidson & Co..............................            $

[NAME OF UW].....................................           


         Total...................................            $