STERLING FINANCIAL CORP /WA/
8-K, 1998-05-04
SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C.  20549
                                                    


                                   FORM 8 - K


     CURRENT REPORT

     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

     Date of Report (Date of earliest event reported) April 28, 1998
                                                      --------------



                         STERLING FINANCIAL CORPORATION 
                         -------------------------------
             (Exact name of registrant as specified in its charter)



         Washington                   0-20800                  91-1572822  
     -------------------      ------------------------       --------------
       (State or other        (Commission File Number)       (IRS Employer 
       jurisdiction of                                       Identification
       Incorporation)                                            Number)   



                111 North Wall Street, Spokane, Washington 99201
               --------------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)



     Registrant's Telephone Number, Including Area Code   (509) 458-3711
                                                          --------------

                                       N/A
          ------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)
     <PAGE>
     INFORMATION TO BE INCLUDED IN THE REPORT



     Item 5.  OTHER EVENTS

     On April 23, 1998, Sterling Financial Corporation ("Sterling") entered
     into a definitive merger agreement ("Agreement") with Big Sky Bancorp,
     Inc. ("Big Sky"), pursuant to which Big Sky will be merged into
     Sterling and Big Sky's wholly-owned subsidiary, First Federal Savings
     and Loan Association of Montana, will be merged into Sterling's
     wholly-owned subsidiary, Sterling Savings Association.  The Agreement
     provides that each share of Big Sky's common stock will be exchanged
     for 1.384 shares of Sterling common stock or up to 497,545 shares of
     common stock, depending on the exercise of Big Sky options.  The
     merger is intended to constitute a tax-free reorganization and to be
     accounted for as a pooling-of-interests.

     Pursuant to the Agreement, Big Sky has agreed to pay Sterling a
     termination fee of $500,000 in the event the Agreement is terminated
     under certain conditions, including the failure of Big Sky's
     shareholders to approve the Agreement or if the Agreement is
     terminated as a result of a breach by Big Sky.  In connection with the
     Agreement, Sterling and certain of Big Sky's shareholders have entered
     into a Stockholders Agreement (the "Stockholders Agreement") pursuant
     to which such Stockholders have agreed to vote a minimum of 68,000
     shares, in the aggregate, of Big Sky common stock in favor of the
     merger.  The Stockholders Agreement was entered into as a condition to
     Sterling's entering into the Agreement.

     Consummation of the merger is subject to several conditions, including
     receipt of requisite regulatory approval and approval by Big Sky's
     shareholders.  For information regarding the terms of the proposed
     transaction, reference is made to the Agreement and the press release
     dated April 23, 1998, which are attached hereto as Exhibits 2 and 99,
     respectively, and incorporated herein by reference.


     Item 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND
              EXHIBITS

     c.  Exhibits:

         2.  Agreement and Plan of Merger dated as of April 23, 1998, by
             and among Sterling Financial Corporation and Big Sky Bancorp,
             Inc.

        99.  Press Release dated April 23, 1998.
     <PAGE>
     STERLING FINANCIAL CORPORATION

     FORM 8 - K



     S I G N A T U R E



     Pursuant to the requirements of the Securities Exchange Act of 1934,
     the registrant has duly caused this report to be signed on its' behalf
     by the undersigned thereunto duly authorized.



                                        STERLING FINANCIAL CORPORATION
                                        (Registrant)

     May 1, 1998                        /s/ Daniel G. Byrne
     -----------                        -----------------------------------
     Date                               Daniel G. Byrne
                                          Sr. Vice President, Finance and
                                          Assistant Secretary

<PAGE>

                                                                 EXHIBIT 99
                                                                 ----------


     FOR release April 23, 1998--2:00 p.m. (PST)

     Contact:  Heidi B. Stanley, EVP
               (509) 358-6160

                    STERLING FINANCIAL CORPORATION TO ACQUIRE
                              BIG SKY BANCORP, INC.

     SPOKANE, WASHINGTON -- APRIL 23, 1998 -- Sterling Financial
     Corporation (NASDAQ:STSA) today announced the signing of a definitive
     agreement to acquire Big Sky Bancorp, Inc., and its subsidiary, First
     Federal Savings and Loan Association of Montana.  Under the terms of
     the agreement, Sterling will issue, subject to exercise of Big Sky
     options, up to 497,545 shares of common stock in exchange for all of
     the issued and outstanding Big Sky stock.  The merger will be
     structured as a tax-free reorganization and accounted for as a pooling
     of interests.

     First Federal conducts operations from two offices in the city of
     Missoula, Montana, the largest city in western Montana, and from its
     headquarters in Hamilton, Montana.  At December 31, 1997, First
     Federal had approximately $62.8 million in total assets with deposits
     of nearly $47.8 million.

     Sterling's Chairman and CEO, Harold B. Gilkey, has very strong ties to
     Montana.  He was born and raised in Livingston, Montana; attended the
     University of Montana in Missoula; and is the immediate past chairman
     of the University of Montana Foundation.  He said, "First Federal is a
     well-established and respected institution.  I believe Sterling can
     continue their rich legacy of customer service and community support.

     "This merger fits well within our broad strategy of being a leading
     community bank in the Northwest.  First Federal is positioned in the
     highest growth area of Montana, which we currently serve through our
     residential lending subsidiary Action Mortgage Co. and our commercial
     banking subsidiary INTERVEST-Mortgage Investment Co," Gilkey stated.

                                     -more-
                                     <PAGE>
     Sterling Financial Corporation
     Page 2
     April 23, 1998

     Michael E. McKee, President and CEO of Big Sky and First Federal,
     said, "As management and the Board of First Federal looked forward,
     considering the size of our company, we recognized that we had limited
     resources with which to better serve our customers as well as expand
     within our markets.  This merger presents an opportunity to increase
     market share, particularly with the addition of Sterling's array of
     financial products and services, including small business services."

     Mr. McKee, a long-time acquaintance of Mr. Gilkey, added, "Sterling's
     community banking expertise and the "Hometown Helpful" manner in which
     they do business is very complementary to the manner in which First
     Federal operates."

     The agreement, which was unanimously approved by both Boards of
     Directors, will merge Big Sky Bancorp, Inc., into Sterling Financial
     Corp. and First Federal Savings and Loan Association into Sterling
     Savings.  The agreement provides for each shareholder of Big Sky to
     receive 1.384 Sterling Common Shares for each of his or her Big Sky
     Common Shares held, and cash in lieu of the issuance of fractional
     shares.

     To illustrate the value of this transaction at a given point in time,
     using Sterling's closing stock price on Wednesday, April 22, of
     $25.625 per share, the transaction would have a value of $35.46 per
     share to Big Sky shareholders, and an approximate transaction value of
     $12.7 million.  This purchase price is approximately 1.61 times Big
     Sky's book value.  Further, as part of the agreement, Big Sky has
     agreed to pay a $500,000 cash break-up fee to Sterling if the
     agreement is terminated under certain circumstances.

     "We anticipate that the merger will have a neutral impact on earnings
     this year and a marginally accretive impact during 1999," Gilkey
     stated.  All First Federal employees will be offered positions with
     Sterling; and Sterling's regional structure will likely be revised to
     take into account the Montana branches.

                                     -more-
     <PAGE>
     Sterling Financial Corporation
     Page 3
     April 23, 1998


     The merger is subject to certain conditions, including receipt of
     regulatory approval and Big Sky shareholder approval.  Pending these
     approvals, Sterling anticipates that the transaction will be completed
     in mid fall.


          Sterling Financial Corporation of Spokane, Washington, is a
          savings and loan holding company which owns Sterling Savings
          Association.  Sterling Savings Association is a Washington State-
          chartered, federally insured stock savings association which
          opened in April 1983.  Sterling Savings Association, based in
          Spokane, Washington, has branches throughout  Washington State
          and in the Portland, Oregon, area.  Through Sterling's wholly
          owned subsidiaries Action Mortgage Company and INTERVEST Mortgage
          Investment Company, it operates loan production offices in
          Washington, Oregon, and Idaho.  Sterling's subsidiary Harbor
          Financial Services provides non-bank investments, including
          mutual funds, variable annuities, and tax-deferred annuities
          through regional representatives throughout Sterling Savings'
          branch network.

                                     - 30 -

<PAGE>

                                                                  EXHIBIT 2
                                                                  ---------


                          AGREEMENT AND PLAN OF MERGER


                                 BY AND BETWEEN


                         STERLING FINANCIAL CORPORATION 


                                       AND


                              BIG SKY BANCORP, INC.


     <PAGE>
                          AGREEMENT AND PLAN OF MERGER

                                 BY AND BETWEEN

            STERLING FINANCIAL CORPORATION AND BIG SKY BANCORP, INC.

     TABLE OF CONTENTS



     ARTICLE I    THE MERGER
                  1.1   The Merger
                  1.2   Effective Time
                  1.3   Effects of the Merger
                  1.4   Conversion of Big Sky Common Stock
                  1.5   Sterling Common Stock
                  1.6   Options
                  1.7   Articles of Incorporation
                  1.8   Bylaws
                  1.9   Directors and Officers
                  1.10  Tax Consequences
                  1.11  Accounting Treatment

     ARTICLE II   EXCHANGE OF SHARES
                  2.1   Sterling to Make Shares Available
                  2.2   Exchange of Shares; Conversion of Options

     ARTICLE III  REPRESENTATIONS AND WARRANTIES OF BIG SKY
                  3.1   Corporate Organization
                  3.2   Capitalization
                  3.3   Authority; No Violation
                  3.4   Consents and Approvals
                  3.5   Loan Portfolio; Reports
                  3.6   Financial Statements; Exchange Act
                          Filings; Books and Records
                  3.7   Broker's Fees
                  3.8   Absence of Certain Changes or Events
                  3.9   Legal Proceedings
                  3.10  Taxes and Tax Returns
                  3.11  Employee Plans
                  3.12  Certain Contracts
                  3.13  Agreements with Regulatory Agencies
                  3.14  State Takeover Laws; Certificate of Incorporation
                  3.15  Environmental Matters
                  3.16  Reserves for Losses
                  3.17  Properties and Assets
                  3.18  Insurance
                  3.19  Compliance with Applicable Laws
                  3.20  Loans3.21Fairness Opinion
                  3.22  Tax and Accounting Treatment of Merger
                  3.23  Undisclosed Liabilities
                  3.24  Big Sky Information
     <PAGE>
     ARTICLE IV   REPRESENTATIONS AND WARRANTIES OF STERLING
                  4.1   Corporate Organization
                  4.2   Capitalization
                  4.3   Authority; No Violation
                  4.4   Consent and Approvals
                  4.5   Reports
                  4.6   Financial Statements; Exchange Act
                          Filings; Books and Records
                  4.7   Absence of Certain Changes or Events
                  4.8   Compliance with Applicable Law
                  4.9   Employee Plans
                  4.10  Agreements with Regulatory Agencies
                  4.11  Tax and Accounting Treatment of Merger
                  4.12  Legal Proceedings
                  4.13  Reserves for Losses
                  4.14  Broker's Fees
                  4.15  Taxes
                  4.16  Sterling Information

     ARTICLE V    COVENANTS RELATING TO CONDUCT OF BUSINESS
                  5.1   Covenants of Big Sky
                  5.2   Covenants of Sterling
                  5.3   Merger Covenants
                  5.4   Employment and Other Agreements

     ARTICLE VI   ADDITIONAL AGREEMENTS
                  6.1   Regulatory Matters
                  6.2   Access to Information
                  6.3   Stockholder Meetings
                  6.4   Legal Conditions to Merger
                  6.5   Stock Exchange Listing
                  6.6   Employees
                  6.7   Indemnification
                  6.8   Subsequent Interim and Annual Financial
                          Statements
                  6.9   Additional Agreements
                  6.10  Advice of Changes
                  6.11  Current Information
                  6.12  Execution and Authorization of Institution Merger
                          Agreement
                  6.13  Change in Structure
                  6.14  Transaction Expenses of Big Sky
                  6.15  Affiliate Agreements

     ARTICLE VII  CONDITIONS PRECEDENT
                  7.1   Conditions to Each Party's Obligation To Effect the
                          Merger
                  7.2   Conditions to Obligations of Sterling
                  7.3   Conditions to Obligations of Big Sky
     <PAGE>
     ARTICLE VIII TERMINATION AND AMENDMENT
                  8.1   Termination
                  8.2   Effect of Termination
                  8.3   Amendment
                  8.4   Extension; Waiver

     ARTICLE IX GENERAL PROVISIONS
                  9.1   Closing
                  9.2   Nonsurvival of Representations, Warranties and
                          Agreements
                  9.3   Expenses
                  9.4   Notices
                  9.5   Interpretation
                  9.6   Counterparts
                  9.7   Entire Agreement
                  9.8   Governing Law
                  9.9   Enforcement of Agreement
                  9.10  Severability
                  9.11  Publicity
                  9.12  Assignment; Limitation of Benefits

     EXHIBITS

                  A     Form of Articles of Combination and Institution
                          Merger Agreement
                  B     Big Sky Disclosure Schedule
                  C(1)  Form of Certificate of Merger
                  C(2)  Articles of Merger
                  D     Form of Agreement of Big Sky Affiliates
                  E     Stockholders Agreement
     <PAGE>
                          AGREEMENT AND PLAN OF MERGER


     This AGREEMENT AND PLAN OF MERGER, dated as of April 23, 1998 (this
     "Agreement"), is entered into by and between Sterling Financial
     Corporation, a Washington corporation ("Sterling") and Big Sky
     Bancorp, Inc., a Delaware corporation ("Big Sky").  

     WHEREAS, the Boards of Directors of Sterling and Big Sky have
     determined that it is in the best interests of their respective
     companies and stockholders to consummate the business combination
     transaction provided for herein in which Big Sky will, subject to the
     terms and conditions set forth herein, merge with and into Sterling,
     with Sterling being the surviving corporation in such merger (the
     "Merger"); 

     WHEREAS, prior to the consummation of the Merger, Sterling and Big Sky
     will respectively cause Sterling Savings Association, a Washington
     State chartered savings and loan association and wholly-owned
     subsidiary of Sterling, and First Federal Savings and Loan Association
     of Montana ("First Federal"), a federally chartered savings and loan
     association and wholly-owned subsidiary of Big Sky, to enter into a
     merger agreement, in the form attached hereto as Exhibit A (the
     "Institution Merger Agreement"), providing for the merger (the
     "Institution Merger") of First Federal with and into Sterling Savings
     Association, with Sterling Savings Association being the "Surviving
     Institution" of the Institution Merger, and it is intended that the
     Institution Merger be consummated immediately after consummation of
     the Merger; 

     WHEREAS, the Merger is intended to be treated as a "reorganization"
     within the meaning of Section 368(a) of the Internal Revenue Code of
     1986, as amended (the "Code"), and as a "pooling of interests" under
     generally accepted accounting principles; and

     WHEREAS, the parties desire to make certain representations,
     warranties and agreements in connection with the Merger and also to
     prescribe certain conditions to the Merger; 

     NOW, THEREFORE, in consideration of the mutual covenants,
     representations, warranties and agreements contained herein, and
     intending to be legally bound hereby, the parties agree as follows: 

                                   ARTICLE I 
                                   THE MERGER
     1.1   THE MERGER.  

     Subject to the terms and conditions of this Agreement, at the
     Effective Time (as defined in Section 1.2 hereof), Big Sky shall merge
     with and into Sterling, with Sterling being the surviving corporation
     (hereinafter sometimes called the "Surviving Corporation") in the
     Merger.  Upon consummation of the Merger, the corporate existence of
     Big Sky shall cease and the Surviving Corporation shall continue to
     exist as a Washington corporation.
     <PAGE>

     1.2   EFFECTIVE TIME.  

     The Merger shall become effective on the Closing Date (as defined in
     Section 9.1 hereof), as set forth in the certificate of merger (the
     "Certificate of Merger") in the form attached as Exhibit C(1) hereto
     which shall be filed with the Secretary of State of the State of
     Delaware on the Closing Date and the articles of merger (the "Articles
     of Merger")  in the form attached as Exhibit C(2) hereto which shall
     be filed with the Secretary of State of the State of Washington on the
     Closing Date.  The term "Effective Time" shall be the date and time
     when the Merger becomes effective on the Closing Date, as set forth in
     the Certificate of Merger.  

     1.3   EFFECTS OF THE MERGER.  

     At and after the Effective Time, the Merger shall have the effects set
     forth in Sections 259 and 261 of the Delaware General Corporation Law
     (the "DGCL") and Section 23B.11.060 of the Washington Business
     Corporation Act (the "WBCA").

     1.4   CONVERSION OF BIG SKY COMMON STOCK.  

     (a)   At the Effective Time, subject to Sections 1.4(b), 1.4(c) and
           1.4(d) hereof, each share of the common stock, par value $.01
           per share, of Big Sky (the "Big Sky Common Stock") issued and
           outstanding prior to the Effective Time shall, by virtue of this
           Agreement and without any action on the part of the holder
           thereof, be converted into and exchangeable for 1.384 shares
           (the "Exchange Ratio") of the common stock, par value $1.00 per
           share, of Sterling (the "Sterling Common Stock").  Subject to
           the last sentence of Section 1.4(b) hereof but notwithstanding
           any other provision of this Agreement, no more than 497,545
           shares of Sterling Common Stock (the "Maximum Share Amount")
           shall be issued or become issuable in connection with the Merger
           and the other transactions contemplated by this Agreement
           (including shares issued or issuable in respect of shares of any
           capital stock of Big Sky, including Big Sky Common Stock, First
           Federal stock or any option or other right to acquire any such
           capital stock). 

     (b)   All of the shares of Big Sky Common Stock converted into
           Sterling Common Stock pursuant to this Article I shall no longer
           be outstanding and shall automatically be canceled and shall
           cease to exist, and each certificate (each a "Certificate")
           previously representing any such shares of Big Sky Common Stock
           shall thereafter represent the right to receive (i) the number
           of whole shares of Sterling Common Stock and (ii) cash in lieu
           of fractional shares into which the shares of Big Sky Common
           Stock represented by such Certificate have been converted
           pursuant to this Agreement. Certificates previously representing
           shares of Big Sky Common Stock shall be exchanged for
     <PAGE>
           certificates representing whole shares of Sterling Common Stock
           and cash in lieu of fractional shares issued in consideration
           therefor upon the surrender of such Certificates in accordance
           with Section 2.2 hereof, without any interest thereon.  If after
           the date hereof and prior to the Effective Time Sterling should
           split or combine its common stock, or pay a dividend or other
           distribution in such common stock, then the Exchange Ratio and
           the Maximum Share Amount shall be appropriately adjusted to
           reflect such split, combination, dividend or distribution.  

     (c)   At the Effective Time, all shares of Big Sky Common Stock that
           are owned by Big Sky as treasury stock and all shares of Big Sky
           Common Stock that are owned directly or indirectly by Sterling
           or Big Sky or any Subsidiary of Big Sky or Sterling shall be
           canceled and shall cease to exist and no stock of Sterling or
           other consideration shall be delivered in exchange therefor. 

           For purposes of this Agreement, "Subsidiary" shall have the
           meaning given that term in Regulation S-X promulgated by the
           Securities and Exchange Commission (the "SEC").

     (d)   Certificates for fractions of shares of Sterling Common Stock
           will not be issued.  In lieu of a fraction of a share of
           Sterling Common Stock, each holder of Big Sky Common Stock
           otherwise entitled to a fraction of a share of Sterling Common
           Stock shall be entitled to receive an amount of cash equal to
           (i) the fraction of a share of the Sterling Common Stock to
           which such holder would otherwise be entitled, multiplied by
           (ii) the market value of the Sterling Common Stock, which shall
           be deemed to be the average of the daily closing prices per
           share for Sterling Common Stock for the twenty consecutive
           trading days on which shares of Sterling Common Stock are
           actually traded (as reported on the Nasdaq Stock Market National
           Market) ending on the third trading day preceding the Closing
           Date.  Following consummation of the Merger, no holder of Big
           Sky Common Stock shall be entitled to dividends or any other
           rights in respect of any such fraction.  

     1.5   STERLING COMMON STOCK.  

     Each share of Sterling Common Stock issued and outstanding immediately
     prior to the Effective Time shall be unchanged and shall remain issued
     and outstanding as common stock of the Surviving Corporation.  

     1.6   OPTIONS.  

     At the Effective Time, each option granted by Big Sky to purchase
     shares of Big Sky Common Stock which is outstanding and unexercised
     immediately prior thereto shall be converted automatically into an
     option to purchase shares of Sterling Common Stock in an amount and at
     an exercise price determined as provided below (and otherwise subject
     <PAGE>
     to the terms of the Big Sky 1992 Stock Option and Incentive Plan (the
     "Big Sky Stock Option Plan"), under which such option was granted: 

     (a)   The number of shares of Sterling Common Stock to be subject to
           the option immediately after the Effective Time shall be equal
           to the product of the number of shares of Big Sky Common Stock
           subject to the option immediately before the Effective Time,
           multiplied by the Exchange Ratio, provided that any fractional
           shares of Sterling Common Stock resulting from such
           multiplication shall be rounded down to the nearest share; and 


     (b)   The exercise price per share of Sterling Common Stock under the
           option immediately after the Effective Time shall be equal to
           the exercise price per share of Big Sky Common Stock under the
           option immediately before the Effective Time divided by the
           Exchange Ratio, provided that such exercise price shall be
           rounded to the nearest cent.  The adjustment provided herein
           shall be and is intended to be effected in a manner which is
           consistent with Section 424(a) of the Code.  The duration and
           other terms of the option immediately after the Effective Time
           shall be the same as the corresponding terms in effect
           immediately before the Effective Time, except that all
           references to Big Sky or First Federal in the Big Sky Stock
           Option Plan (and the corresponding references in the option
           agreement documenting such option) shall be deemed to be
           references to Sterling.  

     1.7   ARTICLES OF INCORPORATION.  

     At the Effective Time, the Articles of Incorporation of Sterling, as
     in effect at the Effective Time, shall be the Articles of
     Incorporation of the Surviving Corporation.  

     1.8   BYLAWS.  

     At the Effective Time, the Bylaws of Sterling, as in effect
     immediately prior to the Effective Time, shall be the Bylaws of the
     Surviving Corporation.  

     1.9   DIRECTORS AND OFFICERS.  

     At the Effective Time, the directors and officers of Sterling
     immediately prior to the Effective Time shall continue to be directors
     and officers of the Surviving Corporation. 

     1.10  TAX CONSEQUENCES.  

     It is intended that the Merger, either alone or in conjunction with
     the Institution Merger, shall constitute a reorganization within the
     meaning of Section 368(a) of the Code, and that this Agreement shall
     constitute a "plan of reorganization" for the purposes of the Code.  
     <PAGE>
     1.11  ACCOUNTING TREATMENT.  

     It is intended that the Merger shall be accounted for as a "pooling of
     interests" under generally accepted accounting principles ("GAAP").  

                                   ARTICLE II 
                               EXCHANGE OF SHARES

     2.1   STERLING TO MAKE SHARES AVAILABLE.  

     At or prior to the Effective Time, Sterling shall deposit, or shall
     cause to be deposited, with Sterling's transfer agent, ChaseMellon
     Shareholder Services, L.L.C., or such other bank, trust company or
     transfer agent as Sterling may select (the "Exchange Agent"), for the
     benefit of the holders of Certificates, for exchange in accordance
     with this Article II, certificates representing the shares of Sterling
     Common Stock and the cash in lieu of fractional shares (such cash and
     certificates for shares of Sterling Common Stock, being hereinafter
     referred to as the "Exchange Fund") to be issued pursuant to Section
     1.4 and paid pursuant to Section 2.2(a) hereof in exchange for
     outstanding shares of Big Sky Common Stock.  
      
     2.2   EXCHANGE OF SHARES; CONVERSION OF OPTIONS.  

     (a)   As soon as practicable after the Effective Time, the Exchange
           Agent shall mail to each holder of record of a Certificate or
           Certificates a form letter of transmittal (which shall specify
           that delivery shall be effected, and risk of loss and title to
           the Certificates shall pass, only upon delivery of the
           Certificates to the Exchange Agent) and instructions for use in
           effecting the surrender of the Certificates in exchange for
           certificates representing the shares of Sterling Common Stock
           and the cash in lieu of fractional shares into which the shares
           of Big Sky Common Stock represented by such Certificate or
           Certificates shall have been converted pursuant to this
           Agreement.  Big Sky shall have the right to review both the
           letter of transmittal and the instructions prior to such
           documents being finalized.  Upon surrender of a Certificate for
           exchange and cancellation to the Exchange Agent, together with
           such letter of transmittal, duly executed, the holder of such
           Certificate shall be entitled to receive in exchange therefor
           (x) a certificate representing that number of whole shares of
           Sterling Common Stock to which such holder of Big Sky Common
           Stock shall have become entitled pursuant to the provisions
           hereof and (y) a check representing the amount of cash in lieu
           of fractional shares, if any, which such holder has the right to
           receive in respect of the Certificate surrendered pursuant to
           the provisions of this Article II, and the Certificate so
           surrendered shall forthwith be canceled.  No interest will be
           paid or accrued on the cash in lieu of fractional shares and
           unpaid dividends and distributions, if any, payable to holders
           of Certificates.  
     <PAGE>
     (b)   No dividends or other distributions declared after the Effective
           Time with respect to Sterling Common Stock and payable to the
           holders of record thereof shall be paid to the holder of any
           unsurrendered Certificate until the holder thereof shall
           surrender such Certificate in accordance with this Article II. 
           After the surrender of a Certificate in accordance with this
           Article II, the record holder thereof shall be entitled to
           receive any such dividends or other distributions, without any
           interest thereon, which theretofore had become payable with
           respect to shares of Sterling Common Stock represented by such
           Certificate.  No holder of an unsurrendered Certificate shall be
           entitled, until the surrender of such Certificate, to vote the
           shares of Sterling Common Stock into which the holder's Big Sky
           Common Stock shall have been converted.  

     (c)   As soon as practicable after the Effective Time, the Exchange
           Agent shall mail to each holder of any unexercised Options a
           form letter of transmittal and instructions for use in effecting
           the issuance of certificates representing the shares of Sterling
           Common Stock into which such Options shall have been converted
           pursuant to this Agreement.  Big Sky shall have the right to
           review both the letter of transmittal and the instructions prior
           to such documents being finalized.  Upon receipt by the Exchange
           Agent of such letter of transmittal, duly executed, the holder
           of such unexercised Option shall be entitled to receive in
           exchange therefor (x) a certificate representing that number of
           whole shares of Sterling Common Stock to which such holder of
           the unexercised Option shall have become entitled pursuant to
           the provisions of Section 1.6 and (y) a check representing the
           amount of cash in lieu of fractional shares, if any, which such
           holder has the right to receive pursuant to the provisions
           hereof.  No interest will be paid or accrued on the cash in lieu
           of fractional shares and unpaid dividends and distributions, if
           any, payable to holders of unexercised Options. 

     (d)   No dividends or other distributions declared after the Effective
           Time with respect to Sterling Common Stock and payable to the
           holders of record thereof shall be paid to the holder of an
           unexercised Option until the holder thereof shall submit the
           letter of transmittal as provided above, at which time the
           holder shall be entitled to receive any such dividends or other
           distributions, without any interest thereon, which theretofore
           had become payable with respect to shares of Sterling Common
           Stock into which the said Options were converted.  No holder of
           an unexercised Option shall be entitled, until submission of the
           letter of transmittal, to vote the shares of Sterling Common
           Stock into which the said Options shall have been converted.

     (e)   If any certificate representing shares of Sterling Common Stock
           is to be issued in a name other than that in which the 
           Certificate surrendered in exchange therefor is registered, 
           it shall be a condition of the issuance thereof that the
     <PAGE>
           Certificate so surrendered shall be properly endorsed (or
           accompanied by an appropriate instrument of transfer) and
           otherwise in proper form for transfer, and that the person
           requesting such exchange shall pay to the Exchange Agent in
           advance any transfer or other taxes required by reason of the
           issuance of a certificate representing shares of Sterling Common
           Stock in any name other than that of the registered holder of
           the Certificate surrendered, or shall establish to the
           satisfaction of the Exchange Agent that such tax has been paid
           or is not payable.  

     (f)   After the Effective Time, there shall be no transfers on the
           stock transfer books of Big Sky of the shares of Big Sky Common
           Stock which were issued and outstanding immediately prior to the
           Effective Time.  If, after the Effective Time, Certificates
           representing such shares are presented for transfer to the
           Exchange Agent, they shall be canceled and exchanged for
           certificates representing shares of Sterling Common Stock as
           provided in this Article II.  

     (g)   Any portion of the Exchange Fund that remains unclaimed by the
           stockholders of Big Sky for six months after the Effective Time
           shall be returned to Sterling.  Any stockholders of Big Sky who
           have not theretofore complied with this Article II shall
           thereafter look only to Sterling for payment of their shares of
           Sterling Common Stock, cash in lieu of fractional shares and
           unpaid dividends and distributions on Sterling Common Stock
           deliverable in respect of each share of Big Sky Common Stock
           such stockholder holds as determined pursuant to this Agreement,
           in each case, without any interest thereon.  Notwithstanding the
           foregoing, none of Sterling, Big Sky, the Exchange Agent or any
           other person shall be liable to any former holder of shares of
           Big Sky Common Stock for any amount properly delivered to a
           public official pursuant to applicable abandoned property,
           escheat or similar laws.  

     (h)   In the event any Certificate shall have been lost, stolen or
           destroyed, upon the making of an affidavit of that fact by the
           person claiming such Certificate to be lost, stolen or destroyed
           and, if required by Sterling, the posting by such person of a
           bond in such amount as Sterling may reasonably direct as
           indemnity against any claim that may be made against it with
           respect to such Certificate, the Exchange Agent will issue in
           exchange for such lost, stolen or destroyed Certificate the
           shares of Sterling Common Stock and cash in lieu of fractional
           shares deliverable in respect thereof pursuant to this
           Agreement.
     <PAGE>
                                  ARTICLE III 
                    REPRESENTATIONS AND WARRANTIES OF BIG SKY

     Big Sky, on behalf of itself and First Federal, hereby makes the
     following representations and warranties to Sterling as set forth in
     this Article III, each of which is being relied upon by Sterling as a
     material inducement to it to enter into and perform this Agreement.  

     3.1   CORPORATE ORGANIZATION.  

     (a)   Big Sky is a corporation duly organized, validly existing and in
           good standing under the laws of the State of Delaware.  Big Sky
           has the corporate power and authority to own or lease all of its
           properties and assets and to carry on its business as it is now
           being conducted, and is duly licensed or qualified to do
           business in each jurisdiction in which the nature of any
           material business conducted by it or the character or location
           of any material properties or assets owned or leased by it makes
           such licensing or qualification necessary.  Big Sky is duly
           registered as a savings and loan holding company with the Office
           of Thrift Supervision (the "OTS") under the Home Owners' Loan
           Act of 1933 (the "HOLA").  First Federal is the only Subsidiary
           of Big Sky.  Section 3.1(a) of the disclosure schedule which is
           attached hereto as Exhibit B (the "Big Sky Disclosure Schedule")
           sets forth true, correct and complete copies of the Certificate
           of Incorporation and Bylaws of Big Sky as in effect as of the
           date of this Agreement.  

     (b)   First Federal is a federally chartered savings association duly
           organized, validly existing and in good standing under the laws
           of the United States.  The deposit accounts of First Federal are
           insured by the Federal Deposit Insurance Corporation (the
           "FDIC") through the Savings Association Insurance Fund (the
           "SAIF") to the fullest extent permitted by law, and all premiums
           and assessments required in connection therewith have been paid
           by First Federal.  First Federal has no Subsidiaries.  First
           Federal has the corporate or other power and authority to own or
           lease all of its properties and assets and to carry on its
           business as it is now being conducted and is duly licensed or
           qualified to do business in each jurisdiction in which the
           nature of any material business conducted by it or the character
           or the location of any material properties or assets owned or
           leased by it makes such licensing or qualification necessary. 
           Section 3.1(b) of the Big Sky Disclosure Schedule sets forth
           true, correct and complete copies of the Charter and Bylaws of
           First Federal as in effect as of the date of this Agreement.  
     <PAGE>
     3.2   CAPITALIZATION.  

     (a)   The authorized capital stock of Big Sky consists of 1,500,000
           shares of Big Sky Common Stock, par value $.01 per share and,
           500,000 shares of serial preferred stock, par value $.01 per
           share.  As of the date hereof, there are (x) 323,721 shares of
           Big Sky Common Stock issued and outstanding (including 15,000
           shares issued pursuant to the Big Sky MRD Plan), and no shares
           of Big Sky Common Stock held in Big Sky's treasury, and (y) no
           shares of Big Sky Common Stock reserved for issuance upon
           exercise of outstanding stock options or otherwise, except for
           (i) 39,100 shares of Big Sky Common Stock reserved for issuance
           pursuant to the Big Sky Stock Option Plan (of which options for
           35,777 shares are currently outstanding). No shares of the said
           serial preferred stock are issued and outstanding.  All of the
           issued and outstanding shares of Big Sky Common Stock have been
           duly authorized and validly issued and are fully paid,
           nonassessable and free of preemptive rights, with no personal
           liability attaching to the ownership thereof.  Except for the
           Big Sky Stock Option Plan and the Big Sky MRD Plan, Big Sky does
           not have and is not bound by any outstanding subscriptions,
           options, warrants, calls, commitments or agreements of any
           character calling for the purchase or issuance of any shares of
           Big Sky Common Stock or any other equity security of Big Sky or
           any securities representing the right to purchase or otherwise
           receive any shares of Big Sky Common Stock or any other equity
           security of Big Sky.  The names of the optionees, the date of
           each option to purchase Big Sky Common Stock granted, the number
           of shares subject to each such option and the price at which
           each such option may be exercised under the Big Sky Stock Option
           Plan are set forth in Section 3.2(a) of the Big Sky Disclosure
           Schedule and no such option expires more than 10 years from the
           date of the grant thereof.  Since December 31, 1997 Big Sky has
           not issued any shares of its capital stock or any securities
           convertible into or exercisable for any shares of its capital
           stock, other than pursuant to the exercise of director or
           employee stock options granted prior to December 31, 1997, under
           the Big Sky Stock Option Plan and pursuant to the Big Sky MRD
           Plan.  

     (b)   Big Sky owns, directly or indirectly, all of the issued and
           outstanding shares of capital stock of First Federal, free and
           clear of all liens, charges, encumbrances and security interests
           whatsoever, and all of such shares are duly authorized and
           validly issued and are fully paid, nonassessable and free of
           preemptive rights, with no personal liability attaching to the
           ownership thereof.  First Federal does not have and is not bound
           by any outstanding subscriptions, options, warrants, calls,
           commitments or agreements of any character calling for the
           purchase or issuance of any shares of its capital stock or any
           other equity security of First Federal or any securities
           representing the right to purchase or otherwise receive any
           shares of capital stock or any other equity security of First
           Federal.
     <PAGE>
     3.3   AUTHORITY; NO VIOLATION.  

     (a)   Big Sky has full corporate power and authority to execute and
           deliver this Agreement and to consummate the transactions
           contemplated hereby.  The execution and delivery of this
           Agreement and the consummation of the transactions contemplated
           hereby have been duly and validly approved by the Board of
           Directors of Big Sky.  The Board of Directors of Big Sky has
           directed that this Agreement and the transactions contemplated
           hereby be submitted to Big Sky's stockholders for approval at a
           meeting of such stockholders and, except for the adoption of
           this Agreement by the requisite vote of Big Sky's stockholders
           pursuant to the Big Sky Certificate of Incorporation and the
           DGCL, no other corporate proceedings on the part of Big Sky
           (except for matters related to setting the date, time, place and
           record date for the said meeting) are necessary to approve this
           Agreement or to consummate the transactions contemplated hereby. 
           This Agreement has been duly and validly executed and delivered
           by Big Sky and (assuming due authorization, execution and
           delivery by Sterling of this Agreement) this Agreement
           constitutes a valid and binding obligation of Big Sky,
           enforceable against Big Sky in accordance with its terms, except
           as enforcement may be limited by general principles of equity
           whether applied in a court of law or a court of equity and by
           bankruptcy, insolvency and similar laws affecting creditors'
           rights and remedies generally.  

     (b)   First Federal has full corporate or other power and authority to
           execute and deliver the Institution Merger Agreement and to
           consummate the transactions contemplated thereby.  The execution
           and delivery of the Institution Merger Agreement and the
           consummation of the transactions contemplated thereby will be
           duly and validly approved by the Board of Directors of First
           Federal, and by Big Sky as the sole stockholder of First Federal
           prior to the Effective Time.  All corporate proceedings on the
           part of First Federal necessary to consummate the transactions
           contemplated thereby will have been taken prior to the Effective
           Time.  The Institution Merger Agreement, upon execution and
           delivery by First Federal, will be duly and validly executed and
           delivered by First Federal and will (assuming due authorization,
           execution and delivery by Sterling Savings Association)
           constitute a valid and binding obligation of First Federal,
           enforceable against First Federal in accordance with its terms,
           except as enforcement may be limited by general principles of
           equity whether applied in a court of law or a court of equity
           and by bankruptcy, insolvency and similar laws affecting
           creditors' rights and remedies generally.  
     <PAGE>
     (c)   Neither the execution and delivery of this Agreement by Big Sky
           or the Institution Merger Agreement by First Federal, nor the
           consummation by Big Sky or First Federal, as the case may be, of
           the transactions contemplated hereby or thereby, nor compliance
           by Big Sky or First Federal with any of the terms or provisions
           hereof or thereof, will (i) violate any provision of the
           Certificate of Incorporation or Bylaws of Big Sky or the Charter
           or Bylaws of First Federal, or (ii) assuming that the consents
           and approvals referred to in Section 3.4 hereof are duly
           obtained, (x) violate any Laws applicable to Big Sky or First
           Federal, or any of their respective properties or assets, or (y)
           violate, conflict with, result in a breach of any provision of
           or the loss of any benefit under, constitute a material default
           (or an event which, with notice or lapse of time, or both, would
           constitute a default) under, result in the termination of or a
           right of termination or cancellation under, accelerate the
           performance required by, or result in the creation of any lien,
           pledge, security interest, charge or other encumbrance upon any
           of the respective properties or assets of Big Sky or First
           Federal under, any of the terms, conditions or provisions of any
           note, bond, mortgage, indenture, deed of trust, license, lease,
           agreement or other instrument or obligation to which Big Sky or
           First Federal is a party, or by which they or any of their
           respective properties or assets may be bound or affected. 

           For the purposes of this Agreement, "Laws" shall mean any and
           all statutes, laws, ordinances, rules, regulations and other
           rules of law enacted, promulgated or issued by any Governmental
           Entity (as defined below). 

     3.4   CONSENTS AND APPROVALS.  

     (a)   Except for (i) the filing of applications and notices, as
           applicable, as to the Merger and the Institution Merger with the
           OTS under the HOLA and the Bank Merger Act and approval of such
           applications and notices, (ii) the filing with the SEC of a
           registration statement on Form S-4 to register the shares of
           Sterling Common Stock to be issued in connection with the Merger
           (including the shares of Sterling Common Stock that may be
           issued in connection with Options as provided  in Section 1.6
           hereof), which will include the proxy statement/prospectus (the
           "Proxy Statement/Prospectus") to be used in soliciting the
           requisite approval of Big Sky stockholders at a meeting of such
           stockholders (the "Big Sky Meeting") to be held in connection
           with this Agreement and the transactions contemplated hereby,
           (iii) the approval of this Agreement by the requisite vote of
           the stockholders of Big Sky pursuant to the Big Sky Certificate
           of Incorporation and the DGCL, (iv) the filing of the
           Certificate of Merger with the Secretary of State of Delaware
           pursuant to the DGCL and (v) the filings required in connection
           with the Institution Merger Agreement and the Institution
           Merger, no consents or approvals of or filings or registrations
     <PAGE>
           with any court, administrative agency or commission or other
           governmental authority or instrumentality (each a "Governmental
           Entity"), or with any third party are necessary in connection
           with (1) the execution and delivery by Big Sky of this
           Agreement; (2) the consummation by Big Sky of the Merger and the
           other transactions contemplated hereby; (3) the execution and
           delivery by First Federal of the Institution Merger Agreement;
           and (4) the performance by First Federal of the Institution
           Merger Agreement and the transactions contemplated thereby,
           except, in each case, for such consents, approvals or filings,
           the failure of which to obtain will not have a material adverse
           effect on the ability to consummate the transactions
           contemplated hereby.  

     (b)   As of the date of this Agreement, Big Sky has no knowledge of
           any reason why approval or effectiveness of any of the
           applications, notices or filings referred to in Section 3.4(a)
           cannot be obtained or granted on a timely basis. 

     3.5   LOAN PORTFOLIO; REPORTS.  

           (a)Except as disclosed in Section 3.5(a) of the Big Sky
           Disclosure Schedule, neither Big Sky nor First Federal is a
           party to any written or oral loan agreement, note or borrowing
           arrangement (including, without limitation, leases, credit
           enhancements, commitments, guarantees and interest-bearing
           assets) (collectively, "Loans"), with any director, officer,
           employee or five percent or greater stockholder of Big Sky or
           First Federal, or any Affiliated Person of the foregoing. 

           For the purposes of this Agreement, "Affiliated Person" shall
           mean director, executive officer or 5% or greater stockholder,
           spouse or other person living in the same household of such
           director, officer or stockholder, or any company, partnership or
           trust in which any of the foregoing persons is an officer, 10%
           or greater stockholder, general partner or 10% or greater trust
           beneficiary.  

     (b)   Since January 1, 1995 Big Sky and First Federal have timely
           filed all reports, registrations and statements, together with
           any amendments required to be made with respect thereto, that
           they have been required to file with (i) the OTS, (ii) the FDIC,
           (iii) the SEC and (iv) any self-regulatory organization ("SRO")
           (collectively "Regulatory Agencies").  As of its respective
           date, each such report, registration, statement and amendment
           complied in all material respects with all rules and regulations
           promulgated by the applicable Regulatory Agency and did not
           contain any untrue statement of a material fact or omit to state
           a material fact required to be stated therein or necessary in
           order to make the statements therein, in light of the
           circumstances under which they were made, not misleading. 
           Except for normal examinations conducted by a Regulatory Agency
     <PAGE>
           in the regular course of the business of Big Sky and First
           Federal, no Governmental Entity is conducting, or has conducted,
           any proceeding or investigation into the business or operations
           of Big Sky or First Federal since March 31, 1995.  

     3.6   FINANCIAL STATEMENTS; EXCHANGE ACT FILINGS; BOOKS AND RECORDS.  

     Big Sky has previously delivered to Sterling true, correct and
     complete copies of (i) the audited consolidated balance sheets of Big
     Sky and First Federal as of March 31 for the fiscal years 1996 and
     1997 and the related audited consolidated statements of income,
     stockholders' equity and cash flows for the fiscal years 1995 through
     1997, inclusive, as reported in Big Sky's Annual Report on Form 10-KSB
     for the fiscal year ended March 31, 1997 filed with the SEC under the
     Securities Exchange Act of 1934, as amended (the "Exchange Act"), in
     each case accompanied by the audit report of Deloitte & Touche, LLP,
     independent public accountants with respect to Big Sky and (ii) the
     unaudited consolidated balance sheets of Big Sky and First Federal as
     of December 31, 1997 and 1996 and the related unaudited consolidated
     statements of income, stockholders' equity and cash flows for the
     interim periods ended December 31, 1997 and 1996, as reported on Big
     Sky's Quarterly Report on Form 10-QSB for the period ended 
     December 31, 1997 filed with the SEC under the Exchange Act.  Big Sky
     will deliver as soon as is reasonably practicable, a draft of the
     consolidated balance sheet of Big Sky and First Federal as of 
     March 31, 1998 and the related consolidated statements of income,
     stockholders' equity and cash flows for the fiscal year ended 
     March 31, 1998,  in the form Big Sky expects to file under the
     Exchange Act in connection with its Form 10-KSB for the fiscal year
     ended March 31, 1998.  The financial statements referred to in this
     Section 3.6 (including the related notes, where applicable but
     excluding the draft statements referred to herein) fairly present, and
     the financial statements referred to in Section 6.8 hereof will fairly
     present (subject, in the case of the unaudited and draft statements,
     to recurring audit adjustments normal in nature and amount), the
     results of the consolidated operations and consolidated financial
     condition of Big Sky and First Federal for the respective fiscal
     periods or as of the respective dates therein set forth; each of such
     statements (including the related notes, where applicable) comply, and
     the financial statements referred to in Section 6.8 hereof will
     comply, with applicable accounting requirements and with the published
     rules and regulations of the SEC with respect thereto and each of such
     statements (including the related notes, where applicable) has been,
     and the financial statements referred to in Section 6.8 hereof will be
     prepared in accordance with GAAP consistently applied during the
     periods involved, except in each case as indicated in such statements
     or in the notes thereto or, in the case of unaudited statements, as
     permitted by Form 10-QSB or, in the case of draft statements, subject
     to revisions that in the aggregate will not be material.  Big Sky's
     Annual Report on Form 10-KSB for the fiscal year ended March 31, 1997
     and all reports subsequently filed under the Exchange Act (the "Big
     Sky Exchange Act Reports") comply in all material respects with the
     <PAGE>
     appropriate requirements for such reports under the Exchange Act, and
     Big Sky has previously delivered or made available to Sterling true,
     correct and complete copies of such reports.  The books and records of
     Big Sky and First Federal have been, and are being, maintained in all
     material respects in accordance with GAAP and any other applicable
     legal and accounting requirements.  

     3.7   BROKER'S FEES.  

     Neither Big Sky nor First Federal nor any of their respective officers
     or directors has employed any broker or finder or incurred any
     liability for any broker's fees, commissions or finder's fees in
     connection with any of the transactions contemplated by this Agreement
     or the Institution Merger Agreement, except that Big Sky has engaged,
     and will pay a fee to Feldman Financial Advisors, Inc. ("Feldman
     Financial") in accordance with the terms of a letter agreement between
     Feldman and Big Sky, dated October 17, 1997, a true, complete and
     correct copy of which is set forth in Section 3.7 of the Big Sky
     Disclosure Schedule.  

     3.8   ABSENCE OF CERTAIN CHANGES OR EVENTS.  

     (a)   Except as disclosed in any Big Sky Exchange Act Report filed
           with the SEC prior to the date of this Agreement, since 
           March 31, 1997 (i) neither Big Sky nor First Federal has
           incurred any material liability, except as contemplated by this
           Agreement or in the ordinary course of their business, (ii)
           neither Big Sky nor First Federal has discharged or satisfied
           any material lien or paid any material obligation or liability
           (absolute or contingent), other than in the ordinary course of
           business; (iii) neither Big Sky nor First Federal has sold,
           assigned, transferred, leased, exchanged or otherwise disposed
           of any of its material properties or assets other than in the
           ordinary course of business; (iv) neither Big Sky nor First
           Federal has suffered any material damage, destruction, or loss,
           whether as a result of fire, explosion, earthquake, accident,
           casualty, labor trouble, requisition or taking of property by
           any Regulatory Authority, flood, windstorm, embargo, riot, act
           of God or other casualty or event, whether or not covered by
           insurance; (v) neither Big Sky nor First Federal has cancelled
           or compromised any debt, except for debts charged off or
           compromised in accordance with the past practice of Big Sky or
           First Federal, as the case may be, and (vi) no event has
           occurred which has had or is reasonably certain to have,
           individually or in the aggregate, a material adverse effect on
           Big Sky.  

     (b)   Since March 31, 1997, Big Sky and First Federal have carried on
           their respective businesses in the ordinary and usual course
           consistent with their past practices. 
     <PAGE>
     3.9   LEGAL PROCEEDINGS.  

     (a)   Neither Big Sky nor First Federal is a party to any, and there
           are no pending or threatened, legal, administrative, arbitration
           or other proceedings, claims, actions or governmental or
           regulatory investigations of any nature against Big Sky or First
           Federal in which there is a reasonable probability of any
           material recovery against or other material adverse effect upon
           Big Sky or First Federal or which challenge the validity or
           propriety of the transactions contemplated by this Agreement or
           the Institution Merger Agreement as to which there is a
           reasonable probability of success. 

     (b)   There is no injunction, order, judgment or decree imposed upon
           Big Sky, First Federal or the assets of Big Sky or First
           Federal.  

     3.10  TAXES AND TAX RETURNS.  

     (a)   Each of Big Sky and First Federal has duly filed all material
           Federal, state, local and foreign Tax Returns required to be
           filed by it on or prior to the date hereof (all such returns
           being accurate and complete in all material respects) and has
           duly paid or made provisions for the payment of all material
           Taxes which have been incurred or are due or claimed to be due
           from it by Federal, state, local and foreign taxing authorities
           on or prior to the date hereof.  All liability with respect to
           the income tax returns of Big Sky and First Federal has been
           satisfied for all years to and including fiscal year 1997.  The
           Internal Revenue Service ("IRS") has not notified Big Sky of, or
           otherwise asserted, that there are any material deficiencies
           with respect to the income tax returns of Big Sky.  There are no
           material disputes pending, or claims asserted for, Taxes or
           assessments upon Big Sky or First Federal, nor has Big Sky or
           First Federal been requested to give any waivers extending the
           statutory period of limitation applicable to any Federal, state
           or local income tax return for any period. 

           For the purposes of this Agreement, "Taxes" shall mean all
           taxes, charges, fees, levies, penalties or other assessments
           imposed by any United States federal, state, local or foreign
           taxing authority, including, but not limited to income, excise,
           property, sales, transfer, franchise, payroll, withholding,
           social security or other taxes, including any interest,
           penalties or additions attributable thereto.  

           For purposes of this Agreement, "Tax Return" shall mean any
           return, report, information return or other document (including
           any related or supporting information) with respect to Taxes.  
     <PAGE>
     3.11  EMPLOYEE PLANS.  

     (a)   Section 3.11(a) of the Big Sky Disclosure Schedule sets forth a
           true and complete list of each employee benefit plan (within the
           meaning of Section 3(3) of the Employee Retirement Income
           Security Act of 1974, as amended ("ERISA")), arrangement or
           agreement that is maintained or contributed to as of the date of
           this Agreement, or that has within the last six years been
           maintained or contributed to, by Big Sky or First Federal or any
           other entity which together with Big Sky would be deemed a
           "single employer" within the meaning of Section 4001 of ERISA or
           Code Sections 414(b), (c), (m) or (o) (an "ERISA Affiliate") or
           under which Big Sky or First Federal or any ERISA Affiliate has
           any liability (collectively, the "Plans").  

     (b)   Section 3.11(b) of the Big Sky Disclosure Schedule sets forth
           true, correct and complete copies of each of the Plans and all
           related documents, including but not limited to (i) the
           actuarial report for such Plan (if applicable) for the last
           year, (ii) the most recent determination letter from the
           Internal Revenue Service (if applicable) for such Plan, (iii)
           the current summary plan description and any summaries of
           material modification, (iv) all annual reports (Form 5500
           series) for each Plan filed for the preceding plan year, (v) all
           agreements with fiduciaries and service providers relating to
           the Plan, and (vi) all substantive correspondence relating to
           any such Plan addressed to or received from the Internal Revenue
           Service, the Department of Labor, the Pension Benefit Guaranty
           Corporation or any other governmental agency.  

     (c)   Except as set forth at Section 3.11(c) of the Big Sky Disclosure
           Schedule, (i) each of the Plans has been operated and
           administered in all material respects in compliance with
           applicable Laws, including but not limited to ERISA and the
           Code, (ii) each of the Plans intended to be "qualified" within
           the meaning of Section 401(a) of the Code is so qualified, (iii)
           with respect to each Plan which is subject to Title IV of ERISA,
           the present value of accrued benefits under such Plan, based
           upon the actuarial assumptions used for funding purposes in the
           most recent actuarial report prepared by such Plan's actuary
           with respect to such Plan, did not, as of its latest valuation
           date, exceed the then current value of the assets of such Plan
           allocable to such accrued benefits, and there has not been a
           material adverse change in the financial condition of such
           Plans, (iv) no Plan provides benefits, including, without
           limitation, death or medical benefits (whether or not insured),
           with respect to current or former employees of Big Sky or First
           Federal beyond their retirement or other termination of service,
           other than (w) coverage mandated by applicable Law, (x) death
           benefits or retirement benefits under a Plan that is an
           "employee pension plan," as that term is defined in Section 3(2)
           of ERISA, (y) deferred compensation benefits under a Plan that
     <PAGE>
           are accrued as liabilities on the books of Big Sky or First
           Federal, or (z) benefits the full cost of which is borne by the
           current or former employee (or the employee's beneficiary), (v)
           Big Sky and First Federal have reserved the right to amend,
           terminate and modify any Plan providing post-retirement death or
           medical benefits, (vi) no material liability under Title IV of
           ERISA has been incurred by Big Sky, First Federal or any ERISA
           Affiliate that has not been satisfied in full, and no condition
           exists that presents a material risk to Big Sky or First Federal
           of incurring a material liability thereunder, (vii) none of Big
           Sky, First Federal or any ERISA Affiliate has incurred, and Big
           Sky does not expect that any such entity will incur, any
           withdrawal liability with respect to a "multiemployer pension
           plan" (as such term is defined in Section 3(37) of ERISA) under
           Title IV of ERISA, or any material liability in connection with
           the termination or reorganization of a multiemployer pension
           plan, (viii) all contributions or other amounts payable by Big
           Sky or First Federal as of the Effective Time with respect to
           each Plan and all other liabilities of each such entity with
           respect to each Plan in respect of current or prior plan years
           have been paid or accrued in accordance with generally accepted
           accounting practices and Section 412 of the Code, (ix) neither
           Big Sky nor First Federal has engaged in a transaction in
           connection with which Big Sky or First Federal is subject to
           either a material civil penalty assessed pursuant to Section 409
           or 502(i) of ERISA or a material tax imposed pursuant to Section
           4975 or 4976 of the Code, (x) to the knowledge of Big Sky, there
           are no pending, threatened or anticipated claims (other than
           routine claims for benefits) by, on behalf of or against any of
           the Plans or any trusts related thereto, (xi) no Plan, program,
           agreement or other arrangement, either individually or
           collectively, provides for any payment by Big Sky or First
           Federal that would not be deductible under Code Sections
           162(a)(1), 162(m) or 404 or that would constitute a "parachute
           payment" within the meaning of Code Section 280G, nor is there
           outstanding under any such Plan, program, agreement or
           arrangement, any limited stock appreciation right or any similar
           right or instrument that could reasonably be expected to prevent
           the Merger from being accounted for as a pooling-of-interests,
           (xii) no "accumulated funding deficiency," as defined in Section
           302(a)(2) of ERISA or Section 412 of the Code, whether or not
           waived, and no "unfunded current liability," as determined under
           Section 412(l) of the Code, exists with respect to any Plan, and
           (xiii) no Plan has experienced a "reportable event" (as such
           term is defined in Section 4043(c) of ERISA) that is not subject
           to an administrative or statutory waiver from the reporting
           requirement.  
     <PAGE>
     3.12  CERTAIN CONTRACTS.  

     (a)   Except as set forth at Section 3.12 of the Big Sky Disclosure
           Schedule, neither Big Sky nor First Federal is a party to or
           bound by any contract, arrangement or commitment (i) with
           respect to the employment of any directors, officers, employees
           or consultants, (ii) which, upon the consummation of the
           transactions contemplated by this Agreement or the Institution
           Merger Agreement will (either alone or upon the occurrence of
           any additional acts or events) result in any payment (whether of
           severance pay or otherwise) becoming due from Sterling, Big Sky,
           First Federal, Sterling Savings Association or any of their
           respective Subsidiaries to any director, officer or employee
           thereof, (iii) which materially restricts the conduct of any
           line of business by Big Sky or First Federal, (iv) with or to a
           labor union or guild (including any collective bargaining
           agreement), (v) (including any stock option plan, stock
           appreciation rights plan, restricted stock plan or stock
           purchase plan) any of the benefits of which will be increased,
           or the vesting of the benefits of which will be accelerated, by
           the occurrence of any of the transactions contemplated by this
           Agreement or the Institution Merger Agreement, or the value of
           any of the benefits of which will be calculated on the basis of
           any of the transactions contemplated by this Agreement or the
           Institution Merger Agreement, (vi) that is material and is not
           made in the ordinary course of business or pursuant to which Big
           Sky or First Federal is or may become obligated to invest in or
           contribute capital to any entity, (vii) not fully disclosed in
           the financial statements contemplated by Section 3.6 that
           relates to borrowings of money (or guarantees thereof by Big
           Sky, or First Federal), other than in the ordinary course of
           business, or (viii) is a lease or similar arrangement with
           annual rental payments of $10,000 or more.  Section 3.12(a) of
           the Big Sky Disclosure Schedule sets forth true, correct and
           complete copies of all employment, consulting and deferred
           compensation agreements to which Big Sky or First Federal is a
           party.  No action taken or notice given as provided in Section
           1.6 hereof will violate the terms of the Big Sky Option Plan,
           constitute a violation of any Laws or give rise to liability to
           any Option holder.   Section 3.12(a) of the Big Sky Disclosure
           Schedule sets forth a list of all material contracts (as defined
           in Item 601(b)(10) of Regulation S-K) of Big Sky.  Each
           contract, arrangement or commitment of the type described in
           this Section 3.12(a), whether or not set forth in Section
           3.12(a) of the Big Sky Disclosure Schedule, is referred to
           herein as a "Big Sky Contract," and neither Big Sky nor First
           Federal has received notice of, nor do any executive officers of
           such entities know of, any violation or imminent violation of
           any Big Sky Contract by any other party thereto.  
     <PAGE>
     (b)   (i) Each Big Sky Contract is a valid and binding commitment of
           Big Sky and is in full force and effect, (ii) each of Big Sky
           and First Federal has in all material respects performed all
           obligations required to be performed by it to date under each
           Big Sky Contract, and (iii) no event or condition exists which
           constitutes or, after notice or lapse of time or both, would
           constitute, a material default on the part of Big Sky or First
           Federal under any such Big Sky Contract.  

     3.13  AGREEMENTS WITH REGULATORY AGENCIES.  

     Neither Big Sky nor First Federal is subject to any cease-and-desist
     or other order issued by, or is a party to any written agreement,
     consent agreement or memorandum of understanding with, or is a party
     to any commitment letter or similar undertaking to, or is subject to
     any order or directive by, or has been a recipient of any
     extraordinary supervisory letter from, or has adopted any board
     resolutions at the request of (each, whether or not set forth on
     Section 3.13 of the Big Sky Disclosure Schedule, a "Regulatory
     Agreement"), any Governmental Entity that restricts the conduct of its
     business or that in any manner relates to its capital adequacy, its
     credit policies, its management or its business, nor has Big Sky or
     First Federal been advised by any Governmental Entity that it is
     considering issuing or requesting any Regulatory Agreement. 

     3.14  STATE TAKEOVER LAWS; CERTIFICATE OF INCORPORATION.  

     The Board of Directors of Big Sky has approved the offer of Sterling
     to enter into this Agreement and the Institution Merger Agreement, and
     has approved Big Sky's entering into this Agreement, the Institution
     Merger Agreement, and the transactions contemplated thereby, such that
     under the DGCL and Big Sky's Certificate of Incorporation the only
     vote of Big Sky stockholders necessary to consummate the transactions
     contemplated hereby is the approval of the holders of at least a
     majority of the outstanding Big Sky Common Stock entitled to vote
     thereon at the Big Sky Meeting or any adjournment or postponement
     thereof.  

     3.15  ENVIRONMENTAL MATTERS.  

     (a)   Each of Big Sky and First Federal is in compliance in all
           material respects with all applicable Laws relating to pollution
           or protection of the environment (including without limitation,
           laws and regulations relating to emissions, discharges, releases
           and threatened releases of Hazardous Material (as hereinafter
           defined)), or otherwise relating to the manufacture, processing,
           distribution, use, treatment, storage, disposal, transport or
           handling of Hazardous Materials; 
     <PAGE>
     (b)   There is no suit, claim, action, proceeding, investigation or
           notice pending or, to the knowledge of Big Sky's and First
           Federal's executive officers, threatened (or to the knowledge of
           Big Sky's and First Federal's executive officers past or present
           actions or events that could reasonably be expected to form the
           basis of any such suit, claim, action, proceeding, investigation
           or notice), in which Big Sky or First Federal has been or, with
           respect to threatened suits, claims, actions, proceedings,
           investigations or notices may be, named as a defendant (x) for
           alleged material noncompliance (including by any predecessor),
           with any environmental law, rule or regulation or (y) relating
           to any material release or threatened release into the
           environment of any Hazardous Material, whether or not occurring
           at or on a site owned, leased or operated (directly or
           indirectly in a fiduciary capacity) by Big Sky or First Federal;

     (c)   To the knowledge of Big Sky's and First Federal's executive
           officers, there has not been any release of Hazardous Materials
           in, on, under or affecting any such property; 

     (d)   To the knowledge of Big Sky's and First Federal's executive
           officers, neither Big Sky nor First Federal has made or
           participated in any loan to any person who is subject to any
           suit, claim, action, proceeding, investigation or notice,
           pending or threatened, with respect to (i) any alleged material
           noncompliance as to any property securing such loan with any
           environmental law, rule or regulation, or (ii) the release or
           the threatened release into the environment of any Hazardous
           Material at any property securing such loan.  

     (e)   For purposes of this section 3.15, the term "Hazardous Material"
           means any hazardous waste, petroleum product, polychlorinated
           biphenyl, chemical, pollutant, contaminant, pesticide,
           radioactive substance, lead paint or other toxic material, or
           other material or substance (in each such case, other than small
           quantities of such substances in retail containers) regulated
           under any applicable environmental or public health statute,
           law, ordinance, rule or regulation.  

     3.16  RESERVES FOR LOSSES.  

     All reserves or other allowances for possible losses reflected in Big
     Sky's most recent financial statements referred to in Section 3.6
     complied with all Laws and are reported in accordance with GAAP. 
     Neither Big Sky nor First Federal has been notified by the OTS, the
     FDIC, any other regulatory authority or by Big Sky's independent
     auditor, in writing or otherwise, that such reserves are inadequate or
     that the practices and policies of Big Sky or First Federal in
     establishing such reserves and in accounting for delinquent and
     classified assets generally fail to comply with applicable accounting
     or regulatory requirements, or that the OTS, the FDIC, any other
     regulatory authority or Big Sky's independent auditor believes such
     <PAGE>
     reserves to be inadequate or inconsistent with the historical loss
     experience of Big Sky or First Federal.  Section 3.16 of the Big Sky
     Disclosure Schedule sets forth a complete list of all extensions of
     credit and other real estate owned ("OREO") that have been classified
     by any regulatory examiner as other loans specially mentioned, special
     mention, substandard, doubtful, loss, classified or criticized, credit
     risk assets, concerned loans or words of similar import.  All OREO, if
     any, held by Big Sky or First Federal is being carried net of reserves
     at fair value.  

     3.17  PROPERTIES AND ASSETS.  

     Section 3.17 of the Big Sky Disclosure Schedule lists as of the date
     of this Agreement (i) all real property owned by Big Sky and First
     Federal; (ii) each real property lease, sublease or installment
     purchase arrangement to which Big Sky or First Federal is a party;
     (iii) a description of each contract for the purchase, sale, or
     development of real estate to which Big Sky or First Federal is a
     party; and (iv) all items of Big Sky's or First Federal's tangible
     personal property and equipment with a book value of $10,000 or more
     or having any annual lease payment of $5,000 or more.  Except for (a)
     items reflected in Big Sky's consolidated financial statements as of
     March 31, 1997 referred to in Section 3.6 hereof, (b) exceptions to
     title that do not interfere materially with Big Sky's or First
     Federal's use and enjoyment of owned or leased real property (other
     than OREO), (c) liens for current real estate taxes not yet
     delinquent, or being contested in good faith, properly reserved
     against, (d) properties and assets sold or transferred in the ordinary
     course of business consistent with past practices since March 31,
     1997, and (e) items listed in Section 3.17 of the Big Sky Disclosure
     Schedule, Big Sky and First Federal have good and, as to owned real
     property, marketable and insurable title to all their properties and
     assets, reflected in the consolidated financial statements of Big Sky
     as of March 31, 1997, free and clear of all material liens, claims,
     charges and other encumbrances.  Big Sky and First Federal, as
     lessees, have the right under valid and subsisting leases to occupy,
     use and possess all property leased by them.  All properties and
     assets used by Big Sky and First Federal are in good operating
     condition and repair (subject to ordinary wear and tear) suitable for
     the purposes for which they are currently utilized and, to the
     knowledge of Big Sky, comply in all material respects with all Laws
     relating thereto now in effect.  Big Sky and First Federal enjoy
     peaceful and undisturbed possession under all leases for the use of
     all property under which they are the lessees, and all leases to which
     Big Sky or First Federal is a party are valid and binding obligations
     of Big Sky or First Federal in accordance with the terms thereof. 
     Neither Big Sky nor First Federal is in material default with respect
     to any such lease, and there has occurred no default by Big Sky or
     First Federal or event which with the lapse of time or the giving of
     notice, or both, would constitute a material default by Big Sky or
     First Federal under any such lease.  To the knowledge of Big Sky,
     there are no Laws, conditions of record, or other impediments which
     interfere with the intended use by Big Sky or First Federal of any of
     the property owned, leased, or occupied by them.
     <PAGE>
     3.18  INSURANCE.  

     Section 3.18 of the Big Sky Disclosure Schedule contains a true,
     correct and complete list of all insurance policies and bonds
     maintained by Big Sky and First Federal, including the name of the
     insurer, the policy number, the type of policy and any applicable
     deductibles.  The existing insurance carried by Big Sky and First
     Federal is sufficient for compliance by Big Sky and First Federal with
     all requirements of Law and agreements to which Big Sky or First
     Federal is subject or is party.  True, correct and complete copies of
     all such policies and bonds set forth in Section 3.18 of the Big Sky
     Disclosure Schedule, as in effect on the date hereof, have been
     delivered or made available to Sterling.  

     3.19  COMPLIANCE WITH APPLICABLE LAWS.  

     Each of Big Sky and First Federal has complied in all material
     respects with all Laws applicable to it or to the operation of its
     business.  Neither Big Sky nor First Federal has received any notice
     of any material alleged or threatened claim, violation or liability
     under any such Laws that has not heretofore been cured and for which
     there is no remaining liability. 

     3.20  LOANS.  

     As of the date hereof: 

     (a)   All loans owned by Big Sky or First Federal, or in which Big Sky
           or First Federal has an interest, comply in all material
           respects with all Laws, including, but not limited to,
           applicable usury statutes, underwriting and recordkeeping
           requirements and the Truth in Lending Act, the Equal Credit
           Opportunity Act and the Real Estate Settlement Procedures Act,
           and other applicable consumer protection statutes and the
           regulations thereunder.  


     (b)   All loans owned by Big Sky or First Federal, or in which Big Sky
           or First Federal has an interest, have been made or acquired by
           Big Sky in all material respects in accordance with board of
           director-approved loan policies.  Each of Big Sky and First
           Federal holds mortgages contained in its loan portfolio for its
           own benefit to the extent of its interest shown therein; such
           mortgages evidence liens having the priority indicated by their
           terms, subject, as of the date of recordation or filing of
           applicable security instruments, only to such exceptions as are
           discussed in attorneys' opinions regarding title or in title
           insurance policies in the mortgage files relating to the loans
           secured by real property or are not material as to the
           collectability of such loans; and all loans owned by Big Sky and
           First Federal are with full recourse to the borrowers, and each
           of Big Sky and First Federal has taken no action which would
           result in a waiver or negation of any rights or remedies
     <PAGE>
           available against the borrower or guarantor, if any, on any
           loan, other than in the ordinary course of business.  All
           applicable remedies against all borrowers and guarantors are
           enforceable except as may be limited by bankruptcy, insolvency,
           moratorium or other similar laws affecting creditors' rights and
           except as may be limited by the exercise of judicial discretion
           in applying principles of equity.  Except as set forth at
           Section 3.20(b) of the Big Sky Disclosure Schedule, all loans
           purchased or originated by Big Sky or First Federal and
           subsequently sold by Big Sky or First Federal have been sold
           without recourse to Big Sky or First Federal and without any
           liability under any yield maintenance or similar obligation. 
           True, correct and complete copies of loan delinquency reports
           prepared by Big Sky and First Federal, which reports include all
           loans delinquent or otherwise in default, are set forth in
           Section 3.20(b) of the Big Sky Disclosure Schedule.  True,
           correct and complete copies of the currently effective lending
           policies of Big Sky and First Federal have been furnished or
           made available to Sterling.  

     (c)   Except as set forth in Section 3.20(c) of the Big Sky Disclosure
           Schedule, each outstanding loan participation sold by Big Sky or
           First Federal was sold with the risk of non-payment of all or
           any portion of that underlying loan to be shared by each
           participant (including Big Sky or First Federal) proportionately
           to the share of such loan represented by such participation
           without any recourse of such other lender or participant to Big
           Sky or First Federal for payment or repurchase of the amount of
           such loan represented by the participation or liability under
           any yield maintenance or similar obligation.  Each of Big Sky
           and First Federal has properly fulfilled in all material
           respects its contractual responsibilities and duties in any loan
           in which it acts as the lead lender or servicer and has complied
           in all material respects with its duties as required under
           applicable regulatory requirements.  

     (d)   Each of Big Sky and First Federal has properly perfected or
           caused to be properly perfected all security interests, liens,
           or other interests in any collateral securing any loans made by
           it.  

     3.21  FAIRNESS OPINION.  

     Big Sky has received an opinion from Feldman Financial dated as of the
     date hereof to the effect that, in its opinion, the Exchange Ratio
     pursuant to this Agreement is fair to the holders of Big Sky Common
     Stock from a financial point of view.  
     <PAGE>
     3.22  TAX AND ACCOUNTING TREATMENT OF MERGER.  

     As of the date of this Agreement, Big Sky is not aware of any fact or
     state of affairs relating to Big Sky that could cause the Merger not
     to be treated as a "reorganization" under Section 368(a) of the Code
     or to qualify for "pooling-of-interests" accounting treatment.  

     3.23  UNDISCLOSED LIABILITIES.  

     Except (i) for those liabilities that are fully reflected or reserved
     against on the consolidated balance sheet of Big Sky included in the
     Big Sky Form 10-QSB for the quarter ended December 31, 1997 or (ii)
     for liabilities incurred in the ordinary course of business consistent
     with past practice since December 31, 1997, neither Big Sky nor First
     Federal has incurred any liability of any nature whatsoever (whether
     absolute, accrued or contingent or otherwise and whether due or to
     become due) that, either alone or when combined with all similar
     liabilities, has had, or would be reasonably expected to have, a
     material adverse effect on Big Sky or First Federal.

     3.24  BIG SKY INFORMATION.  

     The information relating to Big Sky and First Federal to be provided
     by Big Sky to be contained in the Proxy Statement/Prospectus and the
     Registration Statement will not contain any untrue statement of a
     material fact or omit to state a material fact necessary to make the
     statements therein, in light of the circumstances in which they are
     made, not misleading and will comply in all material respects with the
     provisions of the Exchange Act and the rules and regulations
     thereunder.  


                                   ARTICLE IV 
                   REPRESENTATIONS AND WARRANTIES OF STERLING

     Sterling, on behalf of itself and Sterling Savings Association, hereby
     makes the following representations and warranties to Big Sky as set
     forth in this Article IV, each of which is being relied upon by Big
     Sky as a material inducement to enter into and perform this Agreement. 

     4.1   CORPORATE ORGANIZATION.  

     (a)   Sterling is a corporation duly organized, validly existing and
           in good standing under the laws of the State of Washington. 
           Sterling has the corporate power and authority to own or lease
           all of its properties and assets and to carry on its business as
           it is now being conducted, and is duly licensed or qualified to
           do business in each jurisdiction in which the nature of the
           business conducted by it or the character or location of the
           properties and assets owned or leased by it makes such licensing
           or qualification necessary.  Sterling is duly registered as a
           savings and loan holding company with the OTS under HOLA.  The
     <PAGE>
     Restated Certificate of Incorporation and Bylaws of Sterling, copies
     of which have previously been made available to Big Sky, are true,
     correct and complete copies of such documents as in effect as of the
     date of this Agreement.  

     (b)   Sterling Savings Association is a Washington State chartered
           savings and loan association duly organized, validly existing
           and in good standing under the laws of the State of Washington.  
           The deposit accounts of Sterling are insured by the FDIC through
           the SAIF to the fullest extent permitted by law, and all
           premiums and assessments required in connection therewith have
           been paid by Sterling.  Sterling Savings Association has the
           corporate power and authority to own or lease all of its
           properties and assets and to carry on business as is now being
           conducted, and is duly licensed or qualified to do business in
           each jurisdiction in which the nature of the business conducted
           by it or the character or location of the properties and assets
           owned or leased by it makes such licensing or qualification
           necessary.  The Charter and Bylaws of Sterling Savings
           Association, copies of which have previously been made available
           to Big Sky, are true, correct and complete copies of such
           documents as in effect as of the date of this Agreement.  

     4.2   CAPITALIZATION.  

     (a)   The authorized capital stock of Sterling as of the date hereof
           consists of 20,000,000 shares of Sterling Common Stock, of which
           7,569,791 shares were outstanding at December 31, 1997 and
           10,000,000 shares of preferred stock, par value $1.00 per share
           ("Sterling Preferred Stock"), no shares of which were
           outstanding at December 31, 1997.  At such date, there were
           options outstanding to purchase 480,790 shares of Sterling
           Common Stock.  All of the issued and outstanding shares of
           Sterling Common Stock have been duly authorized and validly
           issued and are fully paid, nonassessable and free of preemptive
           rights, with no personal liability attaching to the ownership
           thereof.  As of the date of this Agreement, except as set forth
           above, Sterling does not have and is not bound by any
           outstanding subscriptions, options, warrants, calls, commitments
           or agreements of any character calling for the purchase or
           issuance of any shares of Sterling Common Stock or Sterling
           Preferred Stock or any other equity securities of Sterling or
           any securities representing the right to purchase or otherwise
           receive any shares of Sterling Common Stock or Sterling
           Preferred Stock.  

     (b)   The authorized capital stock of Sterling Savings Association
           consists of 9,000,000 shares of common stock, par value $1.00
           per share, 4,758,743 of which are issued and outstanding, and
           1,000,000 shares of preferred stock, par value $1.00 per share,
           of which 661 shares are issued or outstanding.  The outstanding
           shares of common stock of Sterling Savings Association are owned
     <PAGE>
           by Sterling free and clear of all liens, charges, encumbrances
           and security interests whatsoever, and all of such shares are
           duly authorized and validly issued and fully paid, nonassessable
           and free of preemptive rights, with no personal liability
           attaching to ownership thereof.  Notwithstanding the previous
           sentence, all of the issued and outstanding shares of the common
           and preferred stock of Sterling Savings are pledged to Key Bank
           as security for its loans to Sterling.  

     4.3   AUTHORITY; NO VIOLATION. 

     (a)   Sterling has full corporate power and authority to execute and
           deliver this Agreement and to consummate the transactions
           contemplated hereby.  The execution and delivery of this
           Agreement and the consummation of the transactions contemplated
           hereby have been duly and validly approved by the Board of
           Directors of Sterling.  No other corporate proceedings on the
           part of Sterling are necessary to consummate the transactions
           contemplated hereby.  This Agreement has been duly and validly
           executed and delivered by Sterling and (assuming due
           authorization, execution and delivery by Big Sky) this Agreement
           constitutes a valid and binding obligation of Sterling,
           enforceable against Sterling in accordance with its terms,
           except as enforcement may be limited by general principles of
           equity whether applied in a court of law or a court of equity
           and by bankruptcy, insolvency and similar laws affecting
           creditors' rights and remedies generally.  

     (b)   Sterling Savings Association has full corporate power and
           authority to execute and deliver the Institution Merger
           Agreement and to consummate the transactions contemplated
           thereby.  The execution and delivery of the Institution Merger
           Agreement and the consummation of the transactions contemplated
           thereby will be duly and validly approved by the Board of
           Directors of Sterling Savings Association, and by Sterling as
           the sole stockholder of Sterling Savings Association prior to
           the Effective Time.  All corporate proceedings on the part of
           Sterling Savings Association necessary to consummate the
           transactions contemplated thereby will have been taken prior to
           the Effective Time.  The Institution Merger Agreement, upon
           execution and delivery by Sterling Savings Association, will be
           duly and validly executed and delivered by Sterling Savings
           Association and will (assuming due authorization, execution and
           delivery by First Federal) constitute a valid and binding
           obligation of Sterling Savings Association, enforceable against
           Sterling Savings Association in accordance with its terms,
           except as enforcement may be limited by general principles of
           equity whether applied in a court of law or a court of equity
           and by bankruptcy, insolvency and similar laws affecting
           creditors' rights and remedies generally.  
     <PAGE>
     (c)   Neither the execution and delivery of this Agreement by Sterling
           or the Institution Merger Agreement by Sterling Savings
           Association, nor the consummation by Sterling or Sterling
           Savings Association, as the case may be, of the transactions
           contemplated hereby or thereby, nor compliance by Sterling or
           Sterling Savings Association, as the case may be, with any of
           the terms or provisions hereof or thereof, will (i) violate any
           provision of the Restated Certificate of Incorporation or Bylaws
           of Sterling or the Charter or Bylaws of Sterling Savings
           Association, or (ii) assuming that the consents and approvals
           referred to in Section 4.4 are duly obtained, (x) violate any
           Laws applicable to Sterling or Sterling Savings Association or
           any of their respective properties or assets, or (y) violate,
           conflict with, result in a material breach of any provision of
           or the loss of any benefit under, constitute a default (or an
           event which, with notice or lapse of time, or both, would
           constitute a default) under, result in the termination of or a
           right of termination or cancellation under, accelerate the
           performance required by, or result in the creation of any lien,
           pledge, security interest, charge or other encumbrance upon any
           of the respective properties or assets of Sterling or Sterling
           Savings Association under any of the terms, conditions or
           provisions of any note, bond, mortgage, indenture, deed of
           trust, license, lease, agreement or other instrument or
           obligation to which Sterling or Sterling Savings Association is
           a party, or by which they or any of their respective properties
           or assets may be bound or affected.  

     4.4   CONSENTS AND APPROVALS.  

     (a)   Except for (i) the filing of applications and notices, as
           applicable, as to the Merger and the Institution Merger with the
           OTS under HOLA and the Bank Merger Act and approval of such
           applications and notices, (ii) the filing with the SEC of a
           registration statement on Form S-4 to register the shares of
           Sterling Common Stock to be issued in connection with the Merger
           which will include the Proxy Statement/Prospectus, (iii) the
           approval of this Agreement by the requisite vote of the
           stockholders of Big Sky pursuant to the Big Sky Certificate of
           Incorporation and the DGCL, (iv) the filing of the Articles of
           Merger with the Secretary of State of Washington pursuant to the
           WBCA, (v) the filings in connection with the Institution Merger
           Agreement and the transactions contemplated thereby and (vi)
           such filings and approvals as are required to be made or
           obtained under the securities or "Blue Sky" laws of various
           states or with Nasdaq (or such other exchange as may be
           applicable) in connection with the issuance of the shares of
           Sterling Common Stock pursuant to this Agreement, no consents or
           approvals of or filings or registrations with any Governmental
           Entity are necessary in connection with (1) the execution and
           delivery by Sterling of this Agreement; (2) the performance by
           Sterling of this Agreement and the transactions contemplated
     <PAGE>
           hereby; (3) the execution and delivery by Sterling Savings
           Association of the Institution Merger Agreement; and (4) the
           consummation by Sterling Savings Association of the transactions
           contemplated by the Institution Merger Agreement except, in each
           case, for such consents, approvals or filings the failure of
           which to obtain will not have a material adverse effect on the
           ability to consummate the transactions contemplated hereby.  

     (b)   As of the date of this Agreement, Sterling has no knowledge of
           any reason why approval or effectiveness of any of the
           applications, notices or filings referred to in Section 4.4(a)
           cannot be obtained or granted on a timely basis. 

     4.5   REPORTS

     Since January 1, 1995 Sterling and Sterling Savings Association have
     timely filed all reports, registrations and statements, together with
     any amendments required to be made with respect thereto, that they
     have been required to file with any Regulatory Agencies.  As of its
     respective date, each such report, registration, statement and
     amendment complied in all material respects with all rules and
     regulations promulgated by the applicable Regulatory Agency and did
     not contain any untrue statement of a material fact or omit to state a
     material fact required to be stated therein or necessary in order to
     make the statements therein, in light of the circumstances under which
     they were made, not misleading.  Except for normal examinations
     conducted by a Regulatory Agency in the regular course of the business
     of Sterling and its Subsidiaries, no Governmental Entity is
     conducting, or has conducted, any proceeding or investigation into the
     business or operations of Sterling since December 31, 1993.  

     4.6   FINANCIAL STATEMENTS; EXCHANGE ACT FILINGS; BOOKS AND 
           RECORDS. 

     Sterling has previously delivered to Big Sky true, correct and
     complete copies of (i) the audited consolidated balance sheets of
     Sterling and its Subsidiaries as of December 31, 1996 and 1997 and
     June 30, 1996 and the related consolidated statements of income,
     changes in shareholders' equity and cash flows for the year ended
     December 31, 1997, the six months ended December 31, 1996 and the
     years ended June 30, 1996 and 1995, inclusive, as reported in
     Sterling's Annual Report on Form 10-K for the fiscal year ended
     December 31, 1997 filed with the SEC under the Exchange Act, in each
     case accompanied by the audit report of Coopers & Lybrand, LLP,
     independent public accountants with respect to Sterling; and (ii) the
     unaudited consolidated balance sheets of Sterling and its Subsidiaries
     as of September 30, 1997 and December 31, 1996 and the related
     unaudited consolidated statements of income, changes in shareholders'
     equity and cash flows for the interim periods ended September 30, 1997
     and 1996, as reported on Sterling's Quarterly Report on Form 10-Q for
     the period ended September 30, 1997 filed with the SEC under the
     Exchange Act.  The financial statements referred to in this Section
     4.5 (including the related notes, where applicable) fairly present,
     <PAGE>
     and the financial statements referred to in Section 6.8 hereof will
     fairly present (subject, in the case of the unaudited statements, to
     recurring audit adjustments normal in nature and amount), the results
     of the consolidated operations and consolidated financial condition of
     Sterling and its Subsidiaries for the respective fiscal periods or as
     of the respective dates therein set forth; each of such statements
     (including the related notes, where applicable) comply, and the
     financial statements referred to in Section 6.8 hereof will comply,
     with applicable accounting requirements and with the published rules
     and regulations of the SEC with respect thereto; and each of such
     statements (including the related notes, where applicable) has been,
     and the financial statements referred to in Section 6.8 hereof will
     be, prepared in accordance with GAAP consistently applied during the
     periods involved, except as indicated in the notes thereto or, in the
     case of unaudited statements, as permitted by Form 10-Q.  Sterling's
     Annual Report on Form 10-K for the fiscal year ended December 31, 1997
     and all subsequently filed reports under the Exchange Act comply in
     all material respects with the appropriate requirements for such
     reports under the Exchange Act, and Sterling has previously delivered
     or made available to Big Sky true, correct and complete copies of such
     reports.  The books and records of Sterling and Sterling Savings
     Association have been, and are being, maintained in all material
     respects in accordance with GAAP and any other applicable legal and
     accounting requirements and reflect only actual transactions.  

     4.7   ABSENCE OF CERTAIN CHANGES OR EVENTS.  

     (a)   Except as disclosed in Sterling's Annual Report on Form 10-K for
           the fiscal year ended December 31, 1997 and all reports
           subsequently filed by Sterling under the Exchange Act, true,
           correct and complete copies of which have previously been
           delivered or made available to Big Sky, since December 31, 1997,
           no event has occurred which has had, or is reasonably certain to
           have, individually or in the aggregate, a material adverse
           effect on Sterling.  

     (b)   Since June 30, 1997, Sterling and its Subsidiaries have carried
           on their respective businesses in the ordinary and usual course
           consistent with their past practices.  

     4.8   COMPLIANCE WITH APPLICABLE LAW.  

     Sterling and each Sterling Subsidiary has complied in all material
     respects with all Laws applicable to it or to the operation of its
     business.  Neither Sterling nor any Sterling Subsidiary has received
     any notice of any material alleged or threatened claim, violation of
     or liability under any such Laws that has not heretofore been cured
     and for which there is no remaining liability.  
     <PAGE>
     4.9   EMPLOYEE PLANS.  

     Sterling has heretofore made available for inspection, or delivered
     (if requested) to Big Sky true, correct and complete copies of each
     employee benefit plan arrangement or agreement that is maintained as
     of the date of this Agreement (the "Sterling Plans") by Sterling or
     any of its Subsidiaries.  No "accumulated funding deficiency" as
     defined in Section 302(a)(2) of ERISA or Section 412 of the Code,
     whether or not waived, and no "unfunded current liability" as
     determined under Section 412(l) of the Code exists with respect to any
     Sterling Plan.  The Sterling Plans are in compliance in all material
     respects with the applicable requirements of ERISA and the Code.  

     4.10  AGREEMENTS WITH REGULATORY AGENCIES.  

     Neither Sterling nor any of its affiliates is subject to any
     cease-and-desist or other order issued by, or is a party to any
     written agreement, consent agreement or memorandum of understanding
     with, or is a party to any commitment letter or similar undertaking
     to, or is subject to any order or directive by, or has been a
     recipient of any extraordinary supervisory letter from, or has adopted
     any board resolutions at the request of (each a "Regulatory
     Agreement"), any Governmental Entity that restricts the conduct of its
     business or that in any manner relates to its capital adequacy, its
     credit policies, its management or its business, nor has Sterling or
     Sterling Savings Association been advised by any Governmental Entity
     that it is considering issuing or requesting any Regulatory Agreement. 

     4.11  TAX AND ACCOUNTING TREATMENT OF MERGER.  

     As of the date of this Agreement, Sterling is not aware of any fact or
     state of affairs relating to Sterling that could cause the Merger not
     to be treated as a "reorganization" under Section 368(a) of the Code
     or to qualify for "pooling-of-interests" accounting treatment.  

     4.12  LEGAL PROCEEDINGS.  

     (a)   Neither Sterling nor any of its Subsidiaries is a party to any,
           and there are no pending or threatened, legal, administrative,
           arbitration or other proceedings, claims, actions or
           governmental or regulatory investigations of any nature against
           Sterling or any of its Subsidiaries in which there is a
           reasonable probability of any material recovery against or other
           material adverse effect upon Sterling or any of its Subsidiaries
           or which challenge the validity or propriety of the transactions
           contemplated by this Agreement or the Institution Merger
           Agreement as to which there is a reasonable probability of
           success.  

     (b)   There is no injunction, order, judgment or decree imposed upon
           Sterling, any of its Subsidiaries or the assets of Sterling or
           any of its Subsidiaries.  
     <PAGE>
     4.13  RESERVES FOR LOSSES.  

     All reserves or other allowances for possible losses reflected in
     Sterling's most recent financial statements referred to in Section 4.5
     complied with all Laws and are reported in accordance with GAAP. 
     Neither Sterling nor Sterling Savings Association has been notified by
     the OTS, the FDIC, any other regulator authority or by Sterling's
     independent auditor, in writing or otherwise, that the reserves or
     other allowances for possible loan losses reflected in Sterling's most
     recent financial statements referred to in Section 4.5 are inadequate
     or that the practices and policies of Sterling or Sterling Savings
     Association in establishing such reserves and in accounting for
     delinquent and classified assets generally fail to comply with
     applicable accounting or regulatory requirements or that the OTS, the
     FDIC, any other regulatory authority or Sterling's independent auditor
     believes such reserves to be inadequate or inconsistent with the
     historical loss experience of Sterling or Sterling Savings
     Association.  Sterling has previously furnished Big Sky with a
     complete list of all extensions of credit or OREO that have been
     classified by any bank examiner (regulatory or internal) as other
     loans specially mentioned, special mention, substandard, doubtful,
     loss, classified or criticized, credit risk assets, concerned loans or
     words of similar import.  All OREO held by Sterling or Sterling
     Savings Association is being carried net of reserves at fair value.  

     4.14  BROKER'S FEES.  

     Neither Sterling nor any Sterling Subsidiary nor any of their
     respective officers or directors has employed any broker or finder or
     incurred any liability for any broker's fees, commissions or finder's
     fees in connection with any of the transactions contemplated by this
     Agreement or the Institution Merger Agreement.

     4.15  TAXES.  

     Each of Sterling and its Subsidiaries has duly filed all material
     Federal, state, local and foreign Tax Returns required to be filed by
     it on or prior to the date hereof (all such returns being accurate and
     complete in all material respects) and has duly paid or made
     provisions for the payment of all material Taxes which have been
     incurred or are due or claimed to be due from it by Federal, state,
     local and foreign taxing authorities on or prior to the date hereof. 
     All liability with respect to the income tax returns of Sterling and
     its Subsidiaries has been satisfied for all years to and including
     June 30, 1997.  The IRS has not notified Sterling of, or otherwise
     asserted, that there are any material deficiencies with respect to the
     income tax returns of Sterling.  There are no material disputes
     pending, or claims asserted for, Taxes or assessments upon Sterling or
     any of its Subsidiaries, nor has Sterling or any of its Subsidiaries
     been requested to give any waivers extending the statutory period of
     limitation applicable to any Federal, state or local income tax return
     for any period.  
     <PAGE>
     4.16  STERLING INFORMATION.  

     The information relating to Sterling and its Subsidiaries to be
     provided by Sterling to be contained in the Proxy Statement/Prospectus
     and the Registration Statement will not contain any untrue statement
     of a material fact or omit to state a material fact necessary to make
     the statements therein, in light of the circumstances in which they
     are made, not misleading.  The Proxy Statement/Prospectus (except for
     such portions thereof that relate only to Big Sky or First Federal)
     will comply in all material respects with the provisions of the
     Exchange Act and the rules and regulations thereunder.  The
     Registration Statement will comply in all material respects with the
     provisions of the Securities Act and the rules and regulations
     thereunder.  


                                   ARTICLE V 
                    COVENANTS RELATING TO CONDUCT OF BUSINESS

     5.1   COVENANTS OF BIG SKY.  

     During the period from the date of this Agreement and continuing until
     the Effective Time, except as expressly contemplated or permitted by
     this Agreement or the Institution Merger Agreement, or with the prior
     written consent of Sterling, Big Sky and First Federal shall carry on
     their respective businesses in the ordinary course consistent with
     past practices and consistent with prudent banking practices.  Big Sky
     will use its reasonable best efforts to (x) preserve its business
     organization and that of First Federal intact, (y) keep available to
     itself and Sterling the present services of the employees of Big Sky
     and First Federal and (z) preserve for itself and Sterling the
     goodwill of the customers of Big Sky and First Federal and others with
     whom business relationships exist.  Without limiting the generality of
     the foregoing, and except as set forth in the Big Sky Disclosure
     Schedule or as otherwise contemplated by this Agreement or consented
     to by Sterling in writing, Big Sky shall not, and shall not permit
     First Federal to: 

     (a)   declare or pay any dividends, on or make other distributions in
           respect of, any of its capital stock;

     (b)   (i) split, combine or reclassify any shares of its capital stock
           or issue, authorize or propose the issuance of any other
           securities in respect of, in lieu of or in substitution for
           shares of its capital stock except upon the exercise or
           fulfillment of rights or options issued and outstanding as of
           the date hereof pursuant to the Big Sky Stock Option Plan in
           accordance with their present terms, or (ii) repurchase, redeem
           or otherwise acquire any shares of the capital stock of Big Sky
           or First Federal, or any securities convertible into or
           exercisable for any shares of the capital stock of Big Sky or
           First Federal; 
     <PAGE>
     (c)   issue, deliver or sell, or authorize or propose the issuance,
           delivery or sale of, any shares of its capital stock or any
           securities convertible into or exercisable for, or any rights,
           warrants or options to acquire, any such shares, or enter into
           any agreement with respect to any of the foregoing, other than
           the issuance of Big Sky Common Stock pursuant to stock options
           or similar rights to acquire Big Sky Common Stock granted
           pursuant to the Big Sky Stock Option Plan and outstanding prior
           to the date of this Agreement, in each case in accordance with
           their present terms;

     (d)   amend its Certificate of Incorporation, Bylaws or other similar
           governing documents; 

     (e)   authorize or permit any of its officers, directors, employees or
           agents to, directly or indirectly, solicit, initiate or
           encourage any inquiries relating to, or the making of any
           proposal from, hold discussions or negotiations with or provide
           any information to, any person, entity or group (other than
           Sterling) concerning any Acquisition Transaction (as defined
           below); provided, however, that Big Sky may, and may authorize
           and permit its officers, directors, employees or agents to,
           provide or cause to be provided information and may participate
           in such discussions or negotiations if the Board of Directors of
           Big Sky has determined in good faith that the failure to provide
           such information or participate in such negotiations or
           discussions could cause the members of such Board of Directors
           to breach their fiduciary duties under applicable Laws and the
           Board of Directors has received the written advice of outside
           counsel to that effect.  Big Sky shall promptly communicate
           orally (within one day) and in writing (as promptly as
           practicable) to Sterling the material terms of any proposal,
           whether written or oral, which it may receive in respect of any
           such Acquisition Transaction and whether it is having
           discussions or negotiations with a third party about an
           Acquisition Transaction or providing information in connection
           with, or which may lead to, an Acquisition Transaction with a
           third party.  Big Sky will promptly cease and cause to be
           terminated any existing activities, discussions or negotiations
           previously conducted with any parties other than Sterling with
           respect to any of the foregoing.  As used in this Agreement,
           "Acquisition Transaction" shall mean any offer, proposal or
           expression of interest relating to (i) any tender or exchange
           offer involving Big Sky or First Federal, (ii) merger,
           consolidation or other business combination involving Big Sky or
           First Federal, or (iii) the acquisition in any manner of a
           substantial equity interest in, or a substantial portion of the
           assets, out of the ordinary course of business, of, Big Sky or
           First Federal other than the transactions contemplated or
           permitted by this Agreement and the Institution Merger
           Agreement; 
     <PAGE>
     (f)   make capital expenditures aggregating in excess of $10,000.

     (g)   enter into any new line of business; 

     (h)   acquire or agree to acquire, by merging or consolidating with,
           or by purchasing an equity interest in or the assets of, or by
           any other manner, any business or any corporation, partnership,
           association or other business organization or division thereof
           or otherwise acquire any assets, other than in connection with
           foreclosures, settlements in lieu of foreclosure or troubled
           loan or debt restructurings, or in the ordinary course of
           business consistent with past practices; 

     (i)   take any action that is intended or may reasonably be expected
           to result in any of its representations and warranties set forth
           in this Agreement being or becoming untrue or in any of the
           conditions to the Merger set forth in Article VII not being
           satisfied, or in a violation of any provision of this Agreement
           or the Institution Merger Agreement, except, in every case, as
           may be required by applicable Law; 

     (j)   change its methods of accounting in effect at December 31, 1997
           except as required by changes in GAAP or regulatory accounting
           principles as concurred to by Big Sky's independent auditors; 

     (k)   (i) except as required by applicable law or to maintain
           qualification pursuant to the Code, adopt, amend, renew or
           terminate any Plan or any agreement, arrangement, plan or policy
           between Big Sky or First Federal and one or more of its current
           or former directors, officers or employees, (ii) other than
           normal annual increases in pay, consistent with past practice,
           for employees not subject to an employment, change of control or
           severance agreement, increase in any manner the compensation of
           any employee or director or pay any benefit not required by any
           Plan or agreement as in effect as of the date hereof (including,
           without limitation, the granting of stock options, stock
           appreciation rights, restricted stock, restricted stock units or
           performance units or shares), (iii) enter into, modify or renew
           any contract, agreement, commitment or arrangement providing for
           the payment to any director, officer or employee of compensation
           or benefits, other than normal annual increases in pay,
           consistent with past practice, for employees not subject to an
           employment, change of control or severance agreement, (iv) hire
           any new employee at an annual compensation in excess of $25,000,
           (v) pay expenses of any employees or directors for attending
           conventions or similar meetings which conventions or meetings
           are held after the date hereof, (vi) promote to a rank of vice
           president or more senior any employee, or (vii) pay any
           retention or other bonuses to any employees; 
     <PAGE>
     (l)   incur any indebtedness for borrowed money, assume, guarantee,
           endorse or otherwise as an accommodation become responsible for
           the obligations of any other individual, corporation or other
           entity other than in the ordinary course of business consistent
           with past practice; 

     (m)   sell, purchase, enter into a lease, relocate, open or close any
           banking or other office, or file an application pertaining to
           such action with any Governmental Entity; 

     (n)   make any equity investment or commitment to make such an
           investment in real estate or in any real estate development
           project, other than in connection with foreclosure, settlements
           in lieu of foreclosure, or troubled loan or debt restructuring,
           in the ordinary course of business consistent with past
           practices; 

     (o)   make any new loans to, modify the terms of any existing loan to,
           or engage in any other transactions (other than routine banking
           transactions) with, any Affiliated Person of Big Sky or First
           Federal; 

     (p)   make any investment, or incur deposit liabilities, other than in
           the ordinary course of business consistent with past practices,
           or make any equity investments; 

     (q)   purchase any loans or sell, purchase or lease any real property,
           except for the sale of real estate that is the subject of a
           casualty loss or condemnation or the sale of OREO on a basis
           consistent with past practices; 

     (r)   originate (i) any loans except in accordance with existing First
           Federal lending policies, (ii) unsecured consumer loans in
           excess of $25,000, (iii) commercial real estate first mortgage
           or other commercial loans in excess of $150,000 as to any loan
           or $750,000 in the aggregate as to related loans, or loans to
           related persons, or (iv) land acquisition loans to borrowers who
           intend to construct a residence on such land in excess of the
           lesser of 75% of the appraised value of such land or $100,000,
           except in each case for (A) loans for which written commitments
           have been issued by First Federal as of the date hereof, (B)
           renewals of loans existing as of the date of this Agreement or
           loans permitted pursuant to this Section 5.1(r) and (C)
           increases in the principal amount of loans existing as of the
           date of this Agreement, subject to a limit of 30% of the
           principal amount of such loans as of the date of this Agreement
           or $100,000, whichever is less;  

     (s)   make any investments in excess of $1,000,000, in the aggregate,
           in any equity or derivative securities or engage in any forward
           commitment, futures transaction, financial options transaction,
           hedging or arbitrage transaction or covered asset trading
           activities or make any investments in any investment security
           with a maturity of greater than five years; 
     <PAGE>
     (t)   sell or purchase any mortgage loan servicing rights;

     (u)   agree or commit to do any of the actions set forth in clauses
           (a) - (t) of this Section 5.1.  The consent of Sterling to any
           action by Big Sky or First Federal that is not permitted by any
           of the preceding paragraphs shall be evidenced only by a writing
           signed by the President or any Executive or Senior Vice
           President of Sterling; or

     (v)   take or omit to take any other action that would materially
           adversely affect or materially delay the ability of Big Sky to
           obtain the Requisite Regulatory Approvals or otherwise
           materially adversely affect Big Sky's and First Federal's
           ability to consummate the transactions contemplated by this
           Agreement.  

     5.2   COVENANTS OF STERLING.  

     During the period from the date of this Agreement and continuing until
     the Effective Time, except as expressly contemplated or permitted by
     this Agreement or with Big Sky's prior written consent, Sterling shall
     not, and shall not permit Sterling Savings Association to: 

     (a)   take any action that will result in any of Sterling's
           representations and warranties set forth in this Agreement being
           or becoming untrue or any of the conditions to the Merger set
           forth in Article VII not being satisfied or in a violation of
           any provision of this Agreement or the Institution Merger
           Agreement, except, in every case, as may be required by
           applicable Law; or 

     (b)   take or omit to take any other action that would materially
           adversely affect or materially delay the ability of Sterling to
           obtain the Requisite Regulatory Approvals or otherwise
           materially adversely affect Sterling's and Sterling Savings
           Association's ability to consummate the transactions
           contemplated by this Agreement.  

     5.3   MERGER COVENANTS.  

     Notwithstanding that Big Sky believes that it has established all
     reserves and taken all provisions for possible loan losses required by
     GAAP and applicable Laws, Big Sky recognizes that Sterling may have
     adopted different loan, accrual and reserve policies (including loan
     classifications and levels of reserves for possible loan losses).  In
     that regard, and in general, from and after the date of this Agreement
     to the Effective Time, Big Sky and Sterling shall consult and
     cooperate with each other in order to formulate the plan of
     integration for the Merger, including, among other things, with
     respect to conforming immediately prior to the Effective Time, based
     upon such consultation, Big Sky's loan, accrual and reserve policies
     to those policies of Sterling to the extent consistent with GAAP;
     <PAGE>
     provided, that any change in Big Sky's policies in connection with
     such matters need not be effected until Sterling irrevocably agrees in
     writing that (i) all conditions to Sterling's obligation to consummate
     the Merger have been satisfied, (ii) that Sterling will waive any and
     all rights that it may have to terminate this Agreement and (iii)
     Sterling will complete the Merger.  

     5.4   EMPLOYMENT AND OTHER AGREEMENTS.  

     Following the Merger, Sterling agrees that it shall honor the existing
     written contracts with officers of Big Sky and First Federal that are
     listed at Section 3.12 of the Big Sky Disclosure Schedule; provided,
     however, that in making the foregoing agreement, Sterling will honor
     such contracts only to the extent that the payments of benefits to be
     provided under such contracts, when taken together with any other
     payments to be received by such persons, would not constitute a
     "parachute payment" within the meaning of Code Section 280G(b)(2).  
     Sterling further agrees that, prior to the Effective Time, the
     employment agreements listed at Section 3.12 of the Big Sky Disclosure
     Schedule, shall be amended to provide the (A) in the event, the
     payments and benefits to be provided to an officer shall, in the
     aggregate, constitute a parachute payment within the meaning of
     Section 280G(b)(2) of the Code, the payments and benefits to be
     provided to the officer under the employment agreement shall, at the
     officer's written election, (i) be payable or provided to the officer
     over a period sufficient to reduce the present value of such payments
     or benefits (determined in accordance with Treasury regulations under
     Section 280G of the Code) to an amount which is 2.99 times the
     Officer's "base amount" under Section 280G(b)(3) of the Code or (ii)
     be reduced to the extent necessary to avoid treatment as a parachute
     payment with the allocation of the reduction among such payments and
     benefits and the period over which such payments and benefits are to
     be provided to be determined by the officer and (B) that any cash
     payment due an officer under an employment agreement shall be reduced
     by the amount of any payments to be received by the officer for
     consulting services provided to Sterling following the Effective Time. 


                                   ARTICLE VI 
                              ADDITIONAL AGREEMENTS

     6.1   REGULATORY MATTERS.  

     (a)   Upon the execution and delivery of this Agreement, Sterling and
           Big Sky (as to information to be included therein pertaining to
           Big Sky) shall promptly cause to be prepared and filed with the
           SEC a registration statement of Sterling on Form S-4, including
           the Proxy Statement/Prospectus (the "Registration Statement")
           for the purpose of registering the Sterling Common Stock to be
           issued in the Merger and for soliciting the adoption and
           approval of this Agreement and the Merger by the stockholders of
           Big Sky.  Sterling and Big Sky shall use their reasonable best
     <PAGE>
           efforts to have the Registration Statement declared effective by
           the SEC as soon as possible after the filing thereof.  The
           parties shall cooperate in responding to and considering any
           questions or comments from the SEC staff regarding the
           information contained in the Registration Statement.  If at any
           time after the Registration Statement is filed with the SEC, and
           prior to the Closing Date, any event relating to Big Sky is
           discovered by Big Sky which should be set forth in an amendment
           of, or a supplement to, the Registration Statement, including
           the Proxy Statement/Prospectus, Big Sky shall promptly inform
           Sterling, and shall furnish Sterling with all necessary
           information relating to such event, whereupon Sterling shall
           promptly cause an appropriate amendment to the Registration
           Statement to be filed with the SEC.  Upon the effectiveness of
           such amendment, each of Big Sky and Sterling (if prior to the
           meeting of the stockholders of Big Sky pursuant to Section 6.3
           hereof) will take all necessary action as promptly as
           practicable to permit an appropriate amendment or supplement to
           be transmitted to its stockholders entitled to vote at such
           meeting.  Sterling shall also use reasonable efforts to obtain
           all necessary state securities law or "Blue Sky" permits and
           approvals required to carry out the transactions contemplated by
           this Agreement and the Institution Merger Agreement and Big Sky
           shall furnish all information concerning Big Sky and the holders
           of Big Sky Common Stock as may be reasonably requested in
           connection with any such action.  

     (b)   The parties hereto shall cooperate with each other and use their
           best efforts to promptly prepare and file all necessary
           documentation, to effect all applications, notices, petitions
           and filings, and to obtain as promptly as practicable all
           permits, consents, approvals and authorizations of all third
           parties and Governmental Entities which are necessary or
           advisable to consummate the transactions contemplated by this
           Agreement (including without limitation the Merger and the
           Institution Merger).  Big Sky and Sterling shall have the right
           to review in advance, and to the extent practicable each will
           consult the other on, in each case subject to applicable Laws
           relating to the exchange of information, all the information
           relating to Big Sky or Sterling, as the case may be, which
           appears in any filing made with, or written materials submitted
           to, any third party or any Governmental Entity in connection
           with the transactions contemplated by this Agreement. In
           exercising the foregoing right, each of the parties hereto shall
           act reasonably and as promptly as practicable.  The parties
           hereto agree that they will consult with each other with respect
           to the obtaining of all permits, consents, approvals and
           authorizations of all third parties and Governmental Entities
           necessary or advisable to consummate the transactions
           contemplated by this Agreement and each party will keep the
           other apprised of the status of matters relating to consummation
           of the transactions contemplated herein.  
     <PAGE>
     (c)   Big Sky shall, upon request, furnish Sterling with all
           information concerning Big Sky and its directors, officers and
           stockholders and such other matters as may be reasonably
           necessary or advisable in connection with the Registration
           Statement or any other statement, filing, notice or application
           made by or on behalf of Sterling to any Governmental Entity in
           connection with the Merger or the other transactions
           contemplated by this Agreement.  

     (d)   Sterling and Big Sky shall promptly advise each other upon
           receiving any communication from any Governmental Entity whose
           consent or approval is required for consummation of the
           transactions contemplated by this Agreement which causes such
           party to believe that there is a reasonable likelihood that any
           Requisite Regulatory Approval (as defined in Section 7.1(c)
           hereof) will not be obtained or that the receipt of any such
           approval will be materially delayed.  

     6.2   ACCESS TO INFORMATION.  

     (a)   Upon reasonable notice and subject to applicable Laws relating
           to the exchange of information, Big Sky shall accord to the
           officers, employees, accountants, counsel and other
           representatives of Sterling, access, during normal business
           hours during the period prior to the Effective Time, to all its
           and First Federal's properties, books, contracts, commitments
           and records and, during such period, Big Sky shall make
           available to Sterling (i) a copy of each report, schedule,
           registration statement and other document filed or received by
           it (including First Federal) during such period pursuant to the
           requirements of federal securities laws or federal or state
           banking laws and (ii) all other information concerning its
           (including First Federal) business, properties and personnel as
           Sterling may reasonably request.  Sterling shall receive notice
           of all meetings of the Big Sky and First Federal's Board of
           Directors and any committees thereof, and of any management
           committees (in all cases, at least as timely as all Big Sky and
           First Federal, as the case may be, representatives to such
           meetings are required to be provided notice).  Sterling will
           hold all such information in confidence to the extent required
           by, and in accordance with, the provisions of the
           confidentiality agreement which Sterling entered into with Big
           Sky dated February 2, 1998 (the "Confidentiality Agreement").  

     (b)   Upon reasonable notice and subject to applicable Laws relating
           to the exchange of information, Sterling shall afford to the
           officers, employees, accountants, counsel and other
           representatives of Big Sky, access, during normal business hours
           during the period prior to the Effective Time, to such
           information regarding Sterling as shall be reasonably necessary
           for Big Sky to fulfill its obligations pursuant to this
           Agreement or which may be reasonably necessary for Big Sky to
     <PAGE>
           confirm that the representations and warranties of Sterling
           contained herein are true and correct and that the covenants of
           Sterling contained herein have been performed in all material
           respects.  Big Sky will hold all such information in confidence
           to the extent required by, and in accordance with, the
           provisions of the Confidentiality Agreement.  

     (c)   No investigation by either of the parties or their respective
           representatives shall affect the representations and warranties
           of the other set forth herein.  

     (d)   Big Sky shall provide Sterling with true, correct and complete
           copies of all financial and other information relating to the
           business or operations of Big Sky or First Federal that is
           provided to directors of Big Sky and First Federal in connection
           with meetings of their Boards of Directors or committees
           thereof.  

     6.3   STOCKHOLDER MEETINGS.  

     Big Sky shall take all steps necessary to duly call, give notice of,
     convene and hold a meeting of its stockholders within 40 days after
     the Registration Statement becomes effective for the purpose of voting
     upon the approval of this Agreement and the Merger.  Management and
     the Board of Directors of Big Sky shall recommend to Big Sky's
     stockholders approval of this Agreement, including the Merger, and the
     transactions contemplated hereby, together with any matters incident
     thereto; and in each case shall oppose any third party proposal or
     other action that is inconsistent with this Agreement or the
     consummation of the transactions contemplated hereby (subject in each
     case to compliance in good faith with its fiduciary duties as advised
     by counsel).  Big Sky and Sterling shall coordinate and cooperate with
     respect to the foregoing matters.  

     6.4   LEGAL CONDITIONS TO MERGER.  

     Each of Sterling and Big Sky shall use their reasonable best efforts
     (a) to take, or cause to be taken, all actions reasonably necessary,
     proper or advisable to comply promptly with all legal requirements
     which may be imposed on such party with respect to the Merger and,
     subject to the conditions set forth in Article VII hereof, to
     consummate the transactions contemplated by this Agreement and (b) to
     obtain (and to cooperate with the other party to obtain) any consent,
     authorization, order or approval of, or any exemption by, any
     Governmental Entity and any other third party which is required to be
     obtained by Big Sky or Sterling in connection with the Merger and the
     other transactions contemplated by this Agreement.  
     <PAGE>
     6.5   STOCK EXCHANGE LISTING.  

     Sterling shall use its reasonable best efforts to cause the shares of
     Sterling Common Stock to be issued in the Merger and pursuant to
     options referred to herein to be approved for quotation on the Nasdaq
     Stock Market National Market (or such other exchange on which the
     Sterling Common Stock has become listed, or approved for listing)
     prior to or at the Effective Time.  

     6.6   EMPLOYEES.  

     (a)   To the extent permissible under the applicable provisions of the
           Code and ERISA, for purposes of crediting periods of service for
           eligibility to participate and vesting, but not for benefit
           accrual purposes, under employee pension benefit plans (within
           the meaning of ERISA Section 3(2)) maintained by Sterling or
           Sterling Savings Association, as applicable, individuals who are
           employees of Big Sky or First Federal at the Effective Time will
           be credited with periods of service with Big Sky or First
           Federal before the Effective Time (including service with any
           predecessor employer for which service credit was given under
           similar employee benefit plans of Big Sky or First Federal) as
           if such service had been with Sterling or Sterling Savings
           Association, as applicable.  Similar credit shall also be given
           by Sterling or Sterling Savings Association in calculating other
           retirement plan, vacation and similar benefits for such
           employees of Big Sky or First Federal after the Merger. 
           Sterling will or will cause Sterling Savings Association to (i)
           give credit to employees of Big Sky and First Federal, with
           respect to the satisfaction of the limitations as to
           pre-existing condition exclusions and waiting periods for
           participation and coverage which are applicable under the
           welfare benefit plans of Sterling or Sterling Savings
           Association, equal to the credit that any such employee had
           received as of the Effective Time towards the satisfaction of
           any such limitations and waiting periods under the comparable
           welfare benefit plans of Big Sky and First Federal and (ii)
           provide each employee of Big Sky and First Federal with credit
           for any co-payment and deductibles paid prior to the Effective
           Time in satisfying any deductible or out-of-pocket requirements.

     (c)   Sterling will cause Sterling Savings Association to offer a
           position of at-will employment to each of First Federal's
           non-management branch office personnel in good standing as of
           the Effective Time.  Sterling will use its reasonable best
           efforts in connection with reviewing applicants for employment
           positions to give Big Sky and First Federal employees who are
           not offered positions at the Effective Time the same
           consideration as is afforded Sterling or Sterling Savings
           Association employees for such positions in accordance with
           existing formal or informal policies. 
     <PAGE>
     6.7   INDEMNIFICATION.  

     (a)   In the event of any threatened or actual claim, action, suit,
           proceeding or investigation, whether civil, criminal or
           administrative, in which any person who is now, or has been at
           any time prior to the date of this Agreement, or who becomes
           prior to the Effective Time, a director or officer or employee
           of Big Sky or First Federal (the "Indemnified Parties") is, or
           is threatened to be, made a party based in whole or in part on,
           or arising in whole or in part out of, or pertaining to (i) the
           fact that he is or was a director, officer or employee of Big
           Sky or First Federal or any of their respective predecessors or
           (ii) this Agreement or any of the transactions contemplated
           hereby, whether in any case asserted or arising before or after
           the Effective Time, the parties hereto agree to cooperate and
           use their best efforts to defend against and respond thereto. 
           It is understood and agreed that, after the Effective Time,
           Sterling shall indemnify and hold harmless, as and to the
           fullest extent permitted by applicable law, each such
           Indemnified Party against any losses, claims, damages,
           liabilities, costs, expenses (including reasonable attorney's
           fees and expenses in advance of the final disposition of any
           claim, suit, proceeding or investigation to each Indemnified
           Party to the fullest extent permitted by law upon receipt of any
           undertaking required by applicable law), judgments, fines and
           amounts paid in settlement in connection with any such
           threatened or actual claim, action, suit, proceeding or
           investigation, and in the event of any such threatened or actual
           claim, action, suit, proceeding or investigation (whether
           asserted or arising before or after the Effective Time), the
           Indemnified Parties may retain counsel reasonably satisfactory
           to Sterling; provided, however, that (1) Sterling shall have the
           right to assume the defense thereof and upon such assumption
           Sterling shall not be liable to any Indemnified Party for any
           legal expenses of other counsel or any other expenses
           subsequently incurred by any Indemnified Party in connection
           with the defense thereof, except that if Sterling elects not to
           assume such defense or counsel for the Indemnified Parties
           reasonably advises the Indemnified Parties that there are issues
           which raise conflicts of interest between Sterling and the
           Indemnified Parties, the Indemnified Parties may retain counsel
           reasonably satisfactory to Sterling, and Sterling shall pay the
           reasonable fees and expenses of such counsel for the Indemnified
           Parties, (2) Sterling shall be obligated pursuant to this
           paragraph to pay for only one firm of counsel for each
           Indemnified Party, and (3) Sterling shall not be liable for any
           settlement effected without its prior written consent (which
           consent shall not be unreasonably withheld or delayed).  Any
           Indemnified Party wishing to claim indemnification under this
           Section 6.7, upon learning of any such claim, action, suit,
           proceeding or investigation, shall notify Sterling thereof;
           provided, however, that the failure to so notify shall not
     <PAGE>
           affect the obligations of Sterling under this Section 6.7 except
           to the extent such failure to notify materially prejudices
           Sterling.  Sterling's obligations under this Section 6.7
           continue in full force and effect for a period of six years from
           the Effective Time; provided, however, that all rights to
           indemnification in respect of any claim asserted or made within
           such period shall continue until the final disposition of such
           claim.  

     (b)   Sterling shall use commercially reasonable efforts to cause the
           persons serving as officers and directors of Big Sky immediately
           prior to the Effective Time to be covered by a directors' and
           officers' liability insurance policy ("Tail Insurance") of
           substantially the same coverage and amounts containing terms and
           conditions which are generally not less advantageous than Big
           Sky's current policy with respect to acts or omissions occurring
           prior to the Effective Time which were committed by such
           officers and directors in their capacity as such for a period
           not less than one year.  

     (c)   In the event Sterling or any of its successors or assigns (i)
           consolidates with or merges into any other person or entity and
           shall not be the continuing or surviving corporation or entity
           of such consolidation or merger, or (ii) transfers or conveys
           all or substantially all of its properties and assets to any
           person or entity, then, and in each such case, to the extent
           necessary, proper provision shall be made so that the successors
           and assigns of Sterling assume the obligations set forth in this
           section.  

     (d)   The provisions of this Section 6.7 are intended to be for the
           benefit of, and shall be enforceable by, each Indemnified Party
           and his or her heirs and representatives. 

     6.8   SUBSEQUENT INTERIM AND ANNUAL FINANCIAL STATEMENTS. 

     As soon as reasonably available, but in no event more than 45 days
     after the end of each fiscal quarter (and 90 days in the case of the
     fourth fiscal quarter), Sterling will deliver to Big Sky and Big Sky
     will deliver to Sterling their respective Quarterly and Annual
     Reports, as filed with the SEC under the Exchange Act.  Each party
     shall deliver to the other any Current Reports on Form 8-K promptly
     after filing such reports with the SEC.  

     6.9   ADDITIONAL AGREEMENTS.  

     In case at any time after the Effective Time any further action is
     necessary or desirable to carry out the purposes of this Agreement, or
     to vest the Surviving Corporation or the Surviving Institution with
     full title to all properties, assets, rights, approvals, immunities
     and franchises of any of the parties to the Merger, or the constituent
     parties to the Institution Merger, as the case may be, the proper
     officers and directors of each party to this Agreement and Sterling's
     Subsidiaries and First Federal shall take all such necessary action as
     may be reasonably requested by Sterling.  
     <PAGE>
     6.10  ADVICE OF CHANGES.  

     Sterling and Big Sky shall promptly advise the other party of any
     change or event that, individually or in the aggregate, has had or
     would be reasonably certain to have a material adverse effect on it or
     to cause or constitute a material breach of any of its
     representations, warranties or covenants contained herein.  From time
     to time prior to the Effective Time, each party will promptly
     supplement or amend its disclosure schedule delivered in connection
     with the execution of this Agreement to reflect any matter which, if
     existing, occurring or known at the date of this Agreement, would have
     been required to be set forth or described in such disclosure schedule
     or which is necessary to correct any information in such disclosure
     schedule which has been rendered inaccurate thereby.  No supplement or
     amendment to such disclosure schedule shall have any effect for the
     purpose of determining satisfaction of the conditions set forth in
     Sections 7.2(a) or 7.3(a) hereof, as the case may be, or the
     compliance by Big Sky or Sterling, as the case may be, with the
     respective covenants set forth in Sections 5.1 and 5.2 hereof.  

     6.11  CURRENT INFORMATION.  

     During the period from the date of this Agreement to the Effective
     Time, Big Sky will cause one or more of its designated representatives
     to confer on a regular and frequent basis (not less than monthly) with
     representatives of Sterling and to report the general status of the
     ongoing operations of Big Sky.  Big Sky will promptly notify Sterling
     of any material change in the normal course of business or in the
     operation of the properties of Big Sky and of any governmental
     complaints, investigations or hearings (or communications indicating
     that the same may be contemplated), or the institution or the threat
     of litigation involving Big Sky, and will keep Sterling fully informed
     of such events.  

     6.12  EXECUTION AND AUTHORIZATION OF INSTITUTION MERGER AGREEMENT.  

     Prior to the Effective Time, (a) Sterling and Big Sky shall each
     approve the Institution Merger Agreement as the sole stockholder of
     Sterling Savings Association and First Federal, respectively, and (b)
     First Federal shall execute and deliver the Institution Merger
     Agreement.  

     6.13  CHANGE IN STRUCTURE.  

     Sterling may elect to modify the structure of the transactions
     contemplated by this Agreement as noted herein so long as (i) there
     are no adverse tax consequences to the Big Sky stockholders as a
     result of such modification, (ii) the consideration to be paid to the
     Big Sky stockholders under this Agreement is not thereby changed or
     reduced in amount, and (iii) such modification will not delay or
     jeopardize receipt of any required regulatory approvals.  In the event
     that the structure of the Merger is modified pursuant to this Section
     <PAGE>
     6.13, the parties agree to modify this Agreement and the various
     exhibits hereto to reflect such revised structure.  In such event,
     Sterling shall prepare appropriate amendments to this Agreement and
     the exhibits hereto for execution by the parties hereto.  Big Sky
     agrees to cooperate fully with Sterling to effect such amendments.  

     6.14  TRANSACTION EXPENSES OF BIG SKY.  

     As promptly as practicable after the execution of this Agreement, Big
     Sky will provide to Sterling an estimate of the expenses Big Sky
     expects to incur in connection with the Merger, and shall keep
     Sterling reasonably informed of material changes in such estimate.  

     6.15  AFFILIATE AGREEMENTS.  

     (a)   Not later than the 15th day prior to the mailing of the Proxy
           Statement/Prospectus, Big Sky shall deliver to Sterling a
           schedule of each person that, to the best of its knowledge, is
           or is reasonably likely to be, as of the date of the Big Sky
           stockholder meeting called pursuant to Section 6.3, deemed to be
           an "affiliate of it (each, an "Big Sky Affiliate") as that term
           is used in Rule 145 under the Securities Act or SEC Accounting
           Series Releases 130 and 135.  

     (b)   Big Sky shall use its reasonable best efforts to cause each
           person who may be deemed to be a Big Sky Affiliate to execute
           and deliver to Sterling on or before the date of mailing of the
           Proxy Statement/Prospectus, an agreement in the form attached
           hereto as Exhibit D.   


                                  ARTICLE VII 
                              CONDITIONS PRECEDENT

     7.1   CONDITIONS TO EACH PARTY'S OBLIGATION TO EFFECT THE MERGER. 

     The respective obligation of each party to effect the Merger shall be
     subject to the satisfaction at or prior to the Effective Time of the
     following conditions: 

     (a)   STOCKHOLDER APPROVALS.  

           This Agreement and the Merger shall have been approved and
           adopted by the requisite vote of the Big Sky stockholders.

     (b)   STOCK EXCHANGE LISTING.  

           The shares of Sterling Common Stock which shall be issued in the
           Merger (including the Sterling Common Stock that may be issued
           upon exercise of the options referred to in Section 1.6 hereof)
           upon consummation of the Merger shall have been authorized for
           quotation on the Nasdaq Stock Market National Market (or such
           other exchange on which the Sterling Common Stock may become
           listed).
     <PAGE>
     (c)   OTHER APPROVALS.  

           All regulatory approvals required to consummate the transactions
           contemplated hereby shall have been obtained and shall remain in
           full force and effect and all statutory waiting periods in
           respect thereof shall have expired (all such approvals and the
           expiration of all such waiting periods being referred to herein
           as the "Requisite Regulatory Approvals").  

     (d)   REGISTRATION STATEMENT.  

           The Registration Statement shall have become effective under the
           Securities Act, and no stop order suspending the effectiveness
           of the Registration Statement shall have been issued and no
           proceedings for that purpose shall have been initiated or
           threatened by the SEC.  

     (e)   NO INJUNCTIONS OR RESTRAINTS; ILLEGALITY.  

           No order, injunction or decree issued by any court or agency of
           competent jurisdiction or other legal restraint or prohibition
           (an "Injunction") preventing the consummation of the Merger or
           any of the other transactions contemplated by this Agreement or
           the Certificate of Merger shall be in effect.  No statute, rule,
           regulation, order, injunction or decree shall have been enacted,
           entered, promulgated or enforced by any Governmental Entity
           which prohibits, restricts or makes illegal consummation of the
           Merger.  No proceeding initiated by any Governmental Entity
           seeking an Injunction shall be pending.  

     (f)   FEDERAL TAX OPINION.  

           Sterling shall have received an opinion from Witherspoon,
           Kelley, Davenport & Toole, P.S. to Sterling, and Big Sky shall
           have received an opinion from Breyer & Aguggia, counsel to Big
           Sky, in form and substance reasonably satisfactory to Sterling
           and Big Sky, respectively, dated the date of the Effective Time,
           in each case, substantially to the effect that on the basis of
           facts, representations, and assumptions set forth in such
           opinion which are consistent with the state of facts existing at
           the Effective Time, the Merger will be treated for federal
           income tax purposes as a reorganization within the meaning of
           Section 368(a) of the Code and each of Sterling and Big Sky will
           be a party to the reorganization with the meaning of Section
           368(b) of the Code and that, accordingly, for federal income tax
           purposes, (i) no gain or loss will be recognized by Sterling or
           Big Sky as a result of the Merger, (ii) no gain or loss will be
           recognized by the stockholders of Big Sky who exchange all of
           their Big Sky Common Stock solely for Sterling Common Stock
           pursuant to the Merger (except with respect to cash received in
           lieu of a fractional share interest in Sterling Common Stock),
           and (iii) the aggregate tax basis of the Sterling Common Stock
     <PAGE>
           received by stockholders who exchange all of their Big Sky
           Common Stock solely for Sterling Common Stock pursuant to the
           Merger will be the same as the aggregate tax basis of the Big
           Sky Common Stock surrendered in exchange therefor (reduced by
           any amount allocable to a fractional share interest for which
           cash is received).  In rendering such opinion, such counsel
           shall require and, to the extent such counsel deems necessary or
           appropriate, may rely upon representations and covenants,
           including those contained in certificates of officers of Big
           Sky, Sterling, their respective affiliates and others.  

     7.2   CONDITIONS TO OBLIGATIONS OF STERLING.  

     The obligation of Sterling to effect the Merger is also subject to the
     satisfaction or waiver by Sterling at or prior to the Effective Time
     of the following conditions: 

     (a)   REPRESENTATIONS AND WARRANTIES.  

           The representations and warranties of Big Sky set forth in this
           Agreement shall be true and correct as of the date of this
           Agreement and (except to the extent such representations and
           warranties speak as of an earlier date) as of the Closing Date
           as though made on and as of the Closing Date; provided, however,
           that for purposes of this paragraph, such representations and
           warranties shall be deemed to be true and correct, unless the
           failure or failures of such representations and warranties to be
           so true and correct, individually or in the aggregate, would
           have a material adverse effect on Big Sky.  Sterling shall have
           received a certificate signed on behalf of Big Sky by each of
           the President and Chief Executive Officer and the Chief
           Financial Officer of Big Sky to the foregoing effect.  

     (b)   PERFORMANCE OF COVENANTS AND AGREEMENTS OF BIG SKY 

           Big Sky shall have performed in all material respects all
           covenants and agreements required to be performed by it under
           this Agreement at or prior to the Closing Date.  Sterling shall
           have received a certificate signed on behalf of Big Sky by each
           of the President and Chief Executive Officer and the Chief
           Financial Officer of Big Sky to such effect.  

     (c)   POOLING OF INTERESTS.  

           Sterling shall have received as of the Effective Time, written
           opinions of Coopers & Lybrand LLP and Deloitte and Touche LLP to
           the effect that the Merger may be accounted for as a
           pooling-of-interests.  
     <PAGE>
     (d)   STOCKHOLDERS AGREEMENT

           On or before April 30, 1998, the agreement in the form which is
           attached hereto as Exhibit E (the "Stockholders Agreement") shall 
           have been entered into by all of the stockholders whose names 
           appear on the Stockholders Agreement and a minimum of 68,000
           shares of Big Sky Common Stock shall therefore have become 
           subject to the terms and provisions of the Stockholders Agreement.

     7.3   CONDITIONS TO OBLIGATIONS OF BIG SKY.  

     The obligation of Big Sky to effect the Merger is also subject to the
     satisfaction or waiver by Big Sky at or prior to the Effective Time of
     the following conditions: 

     (a)   REPRESENTATIONS AND WARRANTIES.  

           The representations and warranties of Sterling set forth in this
           Agreement shall be true and correct as of the date of this
           Agreement and (except to the extent such representations and
           warranties speak as of an earlier date) as of the Closing Date
           as though made on and as of the Closing Date; provided, however,
           that for purposes of this paragraph, such representations and
           warranties shall be deemed to be true and correct, unless the
           failure or failures of such representations and warranties to be
           so true and correct, individually or in the aggregate, would
           have a material adverse effect on Sterling.  Big Sky shall have
           received a certificate signed on behalf of Sterling by each of
           the President and Chief Executive Officer and the Chief
           Financial Officer of Sterling to the foregoing effect.  

     (b)   PERFORMANCE OF COVENANTS AND AGREEMENTS OF STERLING. 

           Sterling shall have performed in all material respects all
           covenants and agreements required to be performed by it under
           this Agreement at or prior to the Closing Date.  Big Sky shall
           have received a certificate signed on behalf of Sterling by each
           of the President and Chief Operating Officer and the Chief
           Financial Officer of Sterling to such effect.  


                                  ARTICLE VIII 
                            TERMINATION AND AMENDMENT

     8.1   TERMINATION.  

     This Agreement may be terminated at any time prior to the Effective
     Time, whether before or after approval of this Agreement by the
     stockholders of Big Sky: 

     (a)   by mutual consent of Sterling and Big Sky in a written
           instrument, if the Board of Directors of each so determines by a
           vote of a majority of the members of its entire Board; 
     <PAGE>
     (b)   by either Sterling or Big Sky upon written notice to the other
           party 15 days after the date on which any request or application
           for a Requisite Regulatory Approval shall have been denied or
           withdrawn at the request or recommendation of the Governmental
           Entity which must grant such Requisite Regulatory Approval,
           unless within the 15-day period following such denial or
           withdrawal the parties agree to file, and have filed with the
           applicable Governmental Entity, a petition for rehearing or an
           amended application, provided, however, that no party shall have
           the right to terminate this Agreement, if such denial or request
           or recommendation for withdrawal shall be due to the failure of
           the party seeking to terminate this Agreement to perform or
           observe the covenants and agreements of such party set forth
           herein; 

     (c)   by either Sterling or Big Sky if the Merger shall not have been
           consummated on or before December 31, 1998, unless the failure
           of the Closing to occur by such date shall be due to the failure
           of the party seeking to terminate this Agreement to perform or
           observe the covenants and agreements of such party set forth
           herein; 

     (d)   by either Sterling or Big Sky (provided that Big Sky is not in
           breach of its obligations under Section 6.3 hereof) if the
           approval of the stockholders of Big Sky required for the
           consummation of the Merger as contemplated by this Agreement
           shall not have been obtained by reason of the failure to obtain
           the required vote at the duly held meeting of stockholders or at
           any adjournment or postponement thereof; 

     (e)   by either Sterling or Big Sky (provided that the terminating
           party is not then in breach of any representation, warranty,
           covenant or other agreement contained herein that, individually
           or in the aggregate, would give the other party the right to
           terminate this Agreement) if there shall have been a breach of
           any of the representations or warranties set forth in this
           Agreement on the part of the other party, if such breach,
           individually or in the aggregate, has had or would be reasonably
           certain to have a material adverse effect on the breaching party
           and such breach shall not have been cured within 15 days
           following receipt by the breaching party of written notice of
           such breach from the other party hereto or such breach, by its
           nature, cannot be cured prior to the Closing; 

     (f)   by either Sterling or Big Sky (provided that the terminating
           party is not then in breach of any representation, warranty,
           covenant or other agreement contained herein that, individually
           or in the aggregate, would give the other party the right to
           terminate this Agreement) if there shall have been a material
           breach of any of the covenants or agreements set forth in this
           Agreement on the part of the other party and such breach shall
           not have been cured within 15 days following receipt by the
           breaching party of written notice of such breach from the other
           party hereto or such breach, by its nature, cannot be cured
           prior to the Closing; and
     <PAGE>
     (g)   by either Sterling or  Big Sky, if the Board of Directors of the
           other party shall have withdrawn, modified or changed in a
           manner adverse to the terminating party its approval or
           recommendation of this Agreement and the transactions
           contemplated thereby.

     8.2   EFFECT OF TERMINATION.  

     (a)   In the event of termination of this Agreement by either Sterling
           or Big Sky as provided in Section 8.1 hereof, this Agreement shall
           forthwith become void and have no effect except (i) the last
           sentences of Sections 6.2(a) and 6.2(b) and Sections 8.2, 9.2
           and 9.3 hereof shall survive any termination of this Agreement,
           and (ii) notwithstanding anything to the contrary contained in
           this Agreement, no party shall be relieved or released from any
           liabilities or damages arising out of its willful or intentional
           breach of any provision of this Agreement.  

     (b)   If Sterling has terminated this Agreement pursuant to Sections
           8.1(d), 8.1(e), 8.1(f) or 8.1(g) hereof, Big Sky shall pay to 
           Sterling a fee (the "Big Sky Termination Fee") of $500,000.  
           The Big Sky Termination Fee shall be payable by Big Sky to 
           Sterling within two business days following written notice of 
           a demand therefore and shall be made by wire transfer of 
           immediately available funds to an account designated by Sterling 
           in the said notice.

     (c)   If Big Sky has terminated this Agreement pursuant to Sections
           8.1(e), 8.1(f) or 8.1(g) hereof, or if Sterling has terminated
           this Agreement because (i) the opinion of Coopers & Lybrand LLP
           referred to in Section 7.2(c) hereof has not been provided and
           (ii) the opinion has not been provided because of a condition
           relating to, or action taken by, Sterling, Sterling shall pay to
           Big Sky a fee (the "Sterling Termination Fee") of $300,000.  The
           Sterling Termination Fee shall be payable by Sterling to Big Sky
           within two business days following written notice of a demand
           therefor and shall be made by wire transfer of immediately
           available funds to an account designated by Big Sky in the said
           notice. 

     (d)   Sterling and Big Sky agree that the agreements contained in this
           Section 8.2 are intended to increase the likelihood that the 
           transactions contemplated by this Agreement will occur in 
           accordance herewith, are an integral part of the transactions 
           contemplated by this Agreement and that without such agreements 
           they would not have entered into this Agreement.  If either party 
           fails to pay the amounts due under paragraphs (b) or (c) of this 
           Section 8.2 within the time periods specified  therein, such 
           party shall pay the costs and expenses (including legal fees and 
           expenses) incurred by the other party in connection with any 
           action, including the filing of any lawsuit, taken to
     <PAGE>
           collect payment of such amounts, together with interest on the
           amount of such amounts at the publicly announced prime rate of
           Bank of America from the date such amounts were required to be
           paid.

     8.3   AMENDMENT.  

     Subject to compliance with applicable law, this Agreement may be
     amended by the parties hereto, by action taken or authorized by their
     respective Boards of Directors, at any time before or after approval
     of the matters presented in connection with the Merger by the
     stockholders of Big Sky; provided, however, that after any approval of
     the transactions contemplated by this Agreement by Big Sky's
     stockholders, there may not be, without further approval of such
     stockholders, any amendment of this Agreement which reduces the amount
     or changes the form of the consideration to be delivered to Big Sky
     stockholders hereunder other than as contemplated by this Agreement. 
     This Agreement may not be amended except by an instrument in writing
     signed on behalf of each of the parties hereto.  

     8.4   EXTENSION; WAIVER.  

     At any time prior to the Effective Time, the parties hereto, by action
     taken or authorized by their respective Boards of Directors, may, to
     the extent legally allowed, (a) extend the time for the performance of
     any of the obligations or other acts of the other parties hereto, (b)
     waive any inaccuracies in the representations and warranties contained
     herein or in any document delivered pursuant hereto, and (c) waive
     compliance with any of the agreements or conditions contained herein. 
     Any agreement on the part of a party hereto to any such extension or
     waiver shall be valid only if set forth in a written instrument signed
     on behalf of such party, but such extension or waiver or failure to
     insist on strict compliance with an obligation, covenant, agreement or
     condition shall not operate as a waiver of, or estoppel with respect
     to, any subsequent or other failure.  

                                   ARTICLE IX 
                               GENERAL PROVISIONS

     9.1   CLOSING.  

     Subject to the terms and conditions of this Agreement, the closing of
     the Merger (the "Closing") will take place at 10:00 a.m.  at the
     offices of Witherspoon, Kelley, Davenport & Toole, P.S. on September
     30, 1998 or such other date, place and time as the parties may agree
     (the "Closing Date").  

     9.2   NONSURVIVAL OF REPRESENTATIONS, WARRANTIES AND AGREEMENTS.  

     None of the representations, warranties, covenants and agreements in
     this Agreement or in any instrument delivered pursuant to this
     Agreement shall survive the Effective Time, except for those covenants
     and agreements contained herein or therein which by their terms apply
     in whole or in part after the Effective Time.
     <PAGE>
     9.3   EXPENSES.  

     (a)   All costs and expenses incurred in connection with this 
           Agreement and the transactions contemplated hereby shall be paid 
           by the party incurring such expense.   

     (b)   Any payment required by this Section 9.3 shall be payable by Big
           Sky to Sterling within two business days following written notice 
           of a demand therefore.  Any such payment shall be made by wire
           transfer of immediately available funds to an account designated
           by Sterling in the said notice.  If Big Sky fails to pay
           Sterling the amounts due under this Section 9.3 within the time
           periods specified herein, Big sky shall pay the costs and
           expenses (including legal fees and expenses) incurred by
           Sterling in connection with any action, including the filing of
           any lawsuit, taken to collect payment of such amounts, together
           with interest on the amount of any such unpaid amounts at the
           publicly announced prime rate of the Bank of America from the
           date such amounts were required to be paid.

     9.4   NOTICES.  

     All notices and other communications hereunder shall be in writing and
     shall be deemed given if delivered personally, mailed by registered or
     certified mail (return receipt requested) or delivered by an express
     courier (with confirmation) to the parties at the following addresses
     (or at such other address for a party as shall be specified by like
     notice): 

     (a)   if to Sterling, to: 
             Sterling Financial Corporation 
             111 North Wall Street
             Spokane, Washington 99201
             Attn.: Daniel G. Byrne 
                    Senior Vice President-Finance

           WITH A COPY TO: 
             Witherspoon, Kelley, Davenport & Toole, P.S.
             422 West Riverside Avenue, Suite 1100
             Spokane, Washington  99201
             Attn.:  Donald J. Lukes, Esq.

           and
     (b)   if to Big Sky, to: 
             Big Sky Bancorp, Inc.
             711 South First
             Hamilton, Montana  59840
             Attn.: Michael E. McKee
             President and Chief Executive Officer 
     <PAGE>
           WITH A COPY TO: 
             Breyer & Aguggia
             Suite 470 East
             1300 I Street, N.W.
             Washington, D.C.  20005
             Attn: Paul M. Aguggia, Esq.

     9.5   INTERPRETATION.  

     When a reference is made in this Agreement to Sections, Exhibits or
     Schedules, such reference shall be to a Section of or an Exhibit or
     Schedule to this Agreement unless otherwise indicated.  The table of
     contents and headings contained in this Agreement are for reference
     purposes only and shall not affect in any way the meaning or
     interpretation of this Agreement.  Whenever the words "include",
     "includes" or "including" are used in this Agreement, they shall be
     deemed to be followed by the words "without limitation".  No provision
     of this Agreement shall be construed to require Sterling, Big Sky or
     any of their respective Subsidiaries or affiliates to take any action
     that would violate any applicable law, rule or regulation.  

     9.6   COUNTERPARTS.

     This Agreement may be executed in counterparts, all of which shall be
     considered one and the same agreement and shall become effective when
     counterparts have been signed by each of the parties and delivered to
     the other parties, it being understood that all parties need not sign
     the same counterpart.  

     9.7   ENTIRE AGREEMENT.  

     This Agreement (including the disclosure schedules, documents and the
     instruments referred to herein) constitutes the entire agreement and
     supersedes all prior agreements and understandings, both written and
     oral, among the parties with respect to the subject matter hereof,
     other than the Confidentiality Agreement, the Institution Merger
     Agreement and the Certificate of Merger.

     9.8   GOVERNING LAW.  

     This Agreement shall be governed and construed in accordance with the
     laws of the State of Washington, without regard to any applicable
     conflicts of law rules.  

     9.9   ENFORCEMENT OF AGREEMENT.  

     The parties hereto agree that irreparable damage would occur in the
     event that the provisions of this Agreement were not performed in
     accordance with its specific terms or were otherwise breached.  It is
     accordingly agreed that the parties shall be entitled to an injunction
     or injunctions to prevent breaches of this Agreement and to enforce
     specifically the terms and provisions thereof in any court of the
     United States or any state having jurisdiction, this being in addition
     to any other remedy to which they are entitled at law or in equity. 
     <PAGE>
     9.10  SEVERABILITY.  

     Any term or provision of this Agreement which is invalid or
     unenforceable in any jurisdiction shall, as to that jurisdiction, be
     ineffective to the extent of such invalidity or unenforceability
     without rendering invalid or unenforceable the remaining terms and
     provisions of this Agreement or affecting the validity or
     enforceability of any of the terms or provisions of this Agreement in
     any other jurisdiction.  If any provision of this Agreement is so
     broad as to be unenforceable, the provision shall be interpreted to be
     only so broad as is enforceable.  

     9.11  PUBLICITY.  

     Except as otherwise required by law or the rules of the Nasdaq Stock
     Market National Market (or such other exchange on which the Sterling
     Common Stock may become listed), so long as this Agreement is in
     effect, neither Sterling nor Big Sky shall, or shall permit any of
     Sterling's Subsidiaries or First Federal to, issue or cause the
     publication of any press release or other public announcement with
     respect to, or otherwise make any public statement concerning, the
     transactions contemplated by this Agreement or the Institution Merger
     Agreement without the consent of the other party, which consent shall
     not be unreasonably withheld. 
     9.12   ASSIGNMENT; LIMITATION OF BENEFITS.  

     Neither this Agreement nor any of the rights, interests or obligations
     hereunder shall be assigned by any of the parties hereto (whether by
     operation of law or otherwise) without the prior written consent of
     the other parties.  Subject to the preceding sentence, this Agreement
     will be binding upon, inure to the benefit of and be enforceable by
     the parties and their respective successors and assigns.  Except as
     otherwise specifically provided in Section 6.7 hereof, this Agreement
     (including the documents and instruments referred to herein) is not
     intended to confer upon any person other than the parties hereto any
     rights or remedies hereunder, and the covenants, undertakings and
     agreements set out herein shall be solely for the benefit of, and
     shall be enforceable only by, the parties hereto and their permitted
     assigns.  

     <PAGE>
     IN WITNESS WHEREOF, Sterling and Big Sky have caused this Agreement to
     be executed and delivered by their respective officers thereunto duly
     authorized as of the date first above written.  

                                        STERLING FINANCIAL CORPORATION


                                        By /s/ HAROLD B. GILKEY
                                           -------------------------------
                                           HAROLD B. GILKEY
                                           Chairman and Chief Executive
                                             Officer


                                        BIG SKY BANCORP, INC.


                                        By /s/ MICHAEL E. McKEE
                                           -------------------------------
                                           MICHAEL E. McKEE
                                           President and Chief Executive
                                             Officer

<PAGE>


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