HERITAGE FINANCIAL CORP /WA/
8-K, 1998-10-08
SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION

                               Washington, D.C.

                                   FORM 8-K

                                CURRENT REPORT

                      Pursuant to Section 13 or 15(d) of
                    the Securities and Exchange Act of 1934

               Date of Report (Date of earliest event reported):

                              September 28, 1998


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


         WASHINGTON                      0-29480                  91-1857900
- ----------------------------           ------------           ------------------
(State or other jurisdiction           (Commission               IRS Employer 
      of incorporation)                File Number)           Identification No.

               205 Fifth Avenue S.W.
                    Olympia WA                                98501
      -----------------------------------------             ----------
      (Address of principal executive officers)             (Zip Code)

      Registrant's telephone number, including area code: (360) 943-1500
                                                          --------------
<PAGE>
 
ITEM 5 -- OTHER EVENTS

     On September 28, 1998, Heritage Financial Corporation, Olympia, Washington 
("Heritage") entered into an Agreement and Plan of Merger (the "Agreement") with
Washington Independent Bancshares, Inc. ("WIB") and its wholly-owned subsidiary 
Central Valley Bank, N.A. ("Bank"). Under the terms of the Agreement, Heritage 
and WIB will merge with Heritage surviving the merger. The Bank will become a 
separate wholly-owned commercial bank subsidiary of Heritage. The Agreement was 
approved by the boards of directors of Heritage, WIB and the Bank.

     The Agreement provides that all of the shares of outstanding common stock 
and all of the vested outstanding options of WIB are to be converted into and 
exchanged for between one million (1,000,000) and one million fifty thousand 
(1,050,000) shares of Heritage Common Stock, depending on Heritage's average 
stock price computed for 45 trading days just prior to the date the transaction 
closes. WIB may elect to terminate the transaction if Heritage's average stock 
price computed for that period is below $10.00 per share unless Heritage 
increases the number of shares of Heritage Common Stock to be issued in the 
transaction.

     Consummation of the acquisition is subject to several conditions, 
including, among other things, receipt of applicable regulatory approvals, 
approvals by shareholders of Heritage and WIB, and the receipt of fairness 
opinions. The transaction is expected to be completed by January 31, 1999. For 
information regarding the terms of the proposed transaction, reference is made 
to the Agreement and the news release dated September 28, 1998, which are 
attached hereto as Exhibits 2 and 99, respectively.

ITEM 7 -- FINANCIAL STATEMENTS AND EXHIBITS

     (a)  Financial statements--not applicable.

     (b)  Pro forma financial information--not applicable.

     (c)  Exhibits:

          2    Agreement and Plan of Merger, dated September 28, 1998

          99   News Release issued by Heritage, dated September 28, 1998

                                  SIGNATURES

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

     Dated: October 8, 1998

                                        HERITAGE FINANCIAL CORPORATION

                                        By:  /s/ Donald V. Rhodes
                                           ---------------------------
                                           Donald V. Rhodes
                                           Chairman, President and
                                           Chief Executive Officer


<PAGE>
 
                                                                       EXHIBIT 2

             =====================================================
                                        
                         AGREEMENT AND PLAN OF MERGER

                                    BETWEEN

                        HERITAGE FINANCIAL CORPORATION

                                      AND

                    WASHINGTON INDEPENDENT BANCSHARES, INC.
                           CENTRAL VALLEY BANK, N.A.

             ====================================================


                        DATED AS OF SEPTEMBER 28, 1998
<PAGE>
 
                               TABLE OF CONTENTS
                                        
                                                                PAGE
                                                                ----
RECITALS.......................................................   1

DEFINITIONS....................................................   2

ARTICLE I. MERGER..............................................   5

1.1   THE MERGER...............................................   5
1.2   THE EFFECTIVE DATE.......................................   6

ARTICLE II. CONSIDERATION......................................   6

2.1   EFFECT ON COMPANY COMMON STOCK AND COMPANY OPTIONS.......   6
2.2   EXCHANGE PROCEDURES......................................   8
2.3   EXCEPTION SHARES.........................................   8
2.4   RESERVATION OF RIGHT TO REVISE TRANSACTION...............   8
 
ARTICLE III. ACTIONS PENDING CONSUMMATION                         9
 
3.1   CAPITAL STOCK............................................   9
3.2   DIVIDENDS, ETC...........................................   9
3.3   INDEBTEDNESS; LIABILITIES; ETC...........................   9
3.4   LINE OF BUSINESS; OPERATING PROCEDURES; ETC..............   9
3.5   LIENS AND ENCUMBRANCES...................................   9
3.6   COMPENSATION; EMPLOYMENT AGREEMENTS; ETC.................   9
3.7   BENEFIT PLANS............................................   9
3.8   CONTINUANCE OF BUSINESS..................................   9
3.9   AMENDMENTS...............................................  10
3.10  CLAIMS...................................................  10
3.11  CONTRACTS................................................  10
3.12  LOANS....................................................  10
3.13  TRANSACTION EXPENSES.....................................  10
 
ARTICLE IV. REPRESENTATIONS AND WARRANTIES.....................  10
 
4.1   THE COMPANY AND THE BANK REPRESENTATIONS AND WARRANTIES..  10
4.2   HERITAGE REPRESENTATIONS AND WARRANTIES..................  17
 
ARTICLE V. COVENANTS...........................................  19
 
5.1   BEST EFFORTS.............................................  19
5.2   THE PROXY................................................  19
5.3   REGISTRATION STATEMENT; COMPLIANCE WITH SECURITIES LAWS..  20
5.4   REGISTRATION STATEMENT EFFECTIVENESS.....................  20
5.5   PRESS RELEASES...........................................  20
5.6   ACCESS; INFORMATION......................................  20
5.7   TERMINATION FEE..........................................  20
5.8   REGISTRATION STATEMENT PREPARATION;
      REGULATORY  APPLICATIONS PREPARATION.....................  21
5.9   BLUE-SKY FILINGS.........................................  21
5.10  AFFILIATE AGREEMENTS.....................................  21
5.11  CERTAIN POLICIES OF THE COMPANY AND THE BANK.............  21
5.12  STATE TAKEOVER LAW.......................................  21

                                       i
<PAGE>
 
5.13  NO RIGHTS TRIGGERED......................................  22
5.14  SHARES LISTED............................................  22
5.15  REGULATORY APPLICATIONS..................................  22
5.16  REGULATORY DIVESTITURES..................................  22
5.17  CURRENT INFORMATION......................................  22
5.18  INDEMNIFICATION..........................................  22
5.19  APPOINTMENT OF DIRECTORS.................................  23
5.20  OPERATION OF THE BANK....................................  23
5.21  BENEFIT PLANS............................................  23
 
ARTICLE VI. CONDITIONS TO CONSUMMATION OF THE MERGER...........  23
 
6.1   CONDITIONS TO EACH PARTY'S OBLIGATIONS...................  23
6.2   CONDITIONS TO OBLIGATIONS OF HERITAGE....................  24
6.3   CONDITIONS TO OBLIGATIONS OF COMPANY AND THE BANK........  25
 
ARTICLE VII. TERMINATION.......................................  26

7.1   GROUNDS FOR TERMINATION..................................  26
7.2   CONSEQUENCES OF TERMINATION..............................  26
 
ARTICLE VIII. OTHER MATTERS....................................  26

8.1   SURVIVAL.................................................  26
8.2   WAIVER; AMENDMENT........................................  27
8.3   COUNTERPARTS.............................................  27
8.4   GOVERNING LAW............................................  27
8.5   EXPENSES.................................................  27
8.6   CONFIDENTIALITY..........................................  27
8.7   NOTICES..................................................  27
8.8   ENTIRE UNDERSTANDING; NO THIRD PARTY BENEFICIARIES.......  28
8.9   HEADINGS.................................................  28
 

EXHIBITS

Exhibit A      Approval by Directors of Washington Independent Bancshares, Inc.
Exhibit B      Director's Agreement
Exhibit C      Washington Independent Bancshares, Inc. Affiliate Undertakings
               and Agreements
Exhibit D      Employment Agreement of D. Michael Broadhead
Exhibit E      Employment Agreement of Joe Perry
Exhibit F      Employment Agreement of Richard Maison
Exhibit G      Employment Agreement of Larry Holt
Exhibit H      Legal Opinion of Gordon, Thomas, Honeywell, Malanca, Peterson &
               Daheim, P.L.L.C.
Exhibit I      Legal Opinion of Gerrish & McCreary, P.C.

                                      ii
<PAGE>
 
SCHEDULES

Company Disclosures

Schedule 3.2            Dividends
Schedule 3.3            Indebtedness, Liabilities
Schedule 3.4            Changes to Line of Business, Operating Procedures, etc.
Schedule 3.6            New or Changes to Compensation, Employment Agreements,
                        etc.
Schedule 3.7            New or Modifications to  Benefit Plans
Schedule 3.11           New or Changes to Material Contracts
Schedule 3.13           Transaction Expenses
Schedule 4.1(C)         Shares Outstanding
Schedule 4.1(D)         Subsidiaries
Schedule 4.1(G)         No Defaults - Agreements Requiring Third Party Consent
Schedule 4.1(H)         Financial Reports
Schedule 4.1(I)         Undisclosed Liabilities
Schedule 4.1(J)         No Events Causing Material Adverse Effect
Schedule 4.1(L)         Litigation, Regulatory Action
Schedule 4.1(M)         Compliance with Laws
Schedule 4.1(N)         Material Contracts
Schedule 4.1(Q)(1)      List of Employee Benefit Plans
Schedule 4.1(Q)(2)      Employee Benefit Plans Not Qualified Under ERISA
Schedule 4.1(Q)(6)      Obligations for Retiree Health and Life Benefits
Schedule 4.1(Q)(7)      Agreements Resulting in Payments to Employees Under any
                        Compensation and Benefit Plan with Respect to Proposed
                        Transaction
Schedule 4.1(T)         Asset Classification
Schedule 4.1(V)         Insurance
Schedule 4.1(W)         Affiliates
Schedule 4.1(Z)(2)      Pending Proceedings with Respect to Environmental
                        Matters
Schedule 4.1(Z)(3)      Pending Proceedings with Respect to Environmental
                        Matters Involving Loan/Fiduciary Property
Schedule 4.1(Z)(4)      Pending Proceedings with Respect to Environmental
                        Matters Listed in Sections 4.1(Z)(2) or (3)
Schedule 4.1(Z)(5)      Actions During Ownership Which could have Material   
                        Adverse Effect with Respect to Environmental Matters
Schedule 4.1(Z)(6)      Actions Prior to Ownership Which could Have Material
                        Adverse Effect with Respect to Environmental Matters
Schedule 4.1(AA)        Tax Reports Matters
Schedule 4.1(CC)        Derivative Contracts
Schedule 4.1(EE)(1)     Employment Contracts Requiring Payment in Connection 
                        with Termination
Schedule 4.1(EE)(2)     Leases with Aggregate Annual Rent Exceeding $10,000
Schedule 4.1(EE)(3)     Material Contracts with Affiliates


Heritage Financial Corporation Disclosures

Schedule 4.2(C)         Shares
Schedule 4.2(F)         No Defaults
Schedule 4.2(G)         Financial Reports
Schedule 4.2(H)         No Events Causing Material Adverse Effect
Schedule 4.2(I)         Litigation, Regulatory Action
Schedule 4.2(L)         Derivative Contracts

                                      iii
<PAGE>
 
                         AGREEMENT AND PLAN OF MERGER

     AGREEMENT AND PLAN OF MERGER, dated as of the 28th day of September, 1998
(this "Plan"), is between WASHINGTON INDEPENDENT BANCSHARES, INC. (the
"Company"), CENTRAL VALLEY BANK, N.A.(the "Bank"), and HERITAGE FINANCIAL
CORPORATION ("Heritage").

                                    RECITALS

     (A)  THE COMPANY.  The Company is a company duly organized and existing in
good standing under the laws of the State of Washington, with its principal
executive offices located in Toppenish, Washington. The Company is a registered
bank holding company under the Bank Holding Company Act of 1956, as amended. As
of the date of this Plan, the Company has 10,000,000 authorized shares of common
stock, no par value per share ("Company Common Stock"), of which 1,760,449
shares of Company Common Stock are issued and outstanding and 200,000 authorized
shares of preferred stock of which none are outstanding. As of the date of this
Plan, the Company has 49,000 shares of Company Common Stock reserved for
issuance under employee stock option plans pursuant to which options covering
35,500 shares of Company Common Stock are outstanding (the "Employee Options").
As of the date of this Plan, the Company has 26,000 shares of Company Common
Stock reserved for issuance under director stock option plans pursuant to which
options covering 9,000 shares of Company Common Stock are outstanding (the
"Director Options"). The Employee Options and the Director Options that are
vested immediately prior to the Effective Date are referred to collectively in
this Plan as "Company Options." As of June 30, 1998, the Company had capital of
$4,613,000, divided into common stock of $2,337,000, surplus of $3,931,000,
accumulated deficit of $1,742,000 and unrealized gains of $87,000.

     (B)  THE BANK.  The Bank is a national banking association duly organized
and existing in good standing under the laws of the United States of America,
with its principal executive offices located in Toppenish, Washington. As of the
date of this Plan, the Bank has 200,000 authorized shares of common stock,
$20.00 par value per share ("Bank Common Stock") (no other class of capital
stock being authorized), of which 200,000 shares of Bank Common Stock are issued
and outstanding. All of the issued and outstanding shares of Bank Common Stock
are owned by the Company, the sole shareholder of the Bank. As of June 30, 1998,
the Bank had capital of $4,591,000, divided into common stock of $1,700,000
surplus of $720,000, and undivided profits of $2,169,000.

     (C)  HERITAGE.  Heritage is a corporation duly organized and existing in
good standing under the laws of the State of Washington, with its principal
executive offices located in Olympia, Washington. Heritage is a registered bank
holding company under the Bank Holding Company Act of 1956, as amended. As of
the date of this Plan, Heritage has 2,500,000 authorized shares of preferred
stock, no par value per share, of which none of these shares are issued or
outstanding, and Heritage has 15,000,000 authorized shares of common stock, no
par value per share ("Heritage Common Stock"), of which 9,781,082 shares of
Heritage Common Stock are issued and outstanding as of June 30, 1998. As of June
30, 1998, Heritage had capital of $93,862,000 divided into common stock and
surplus of $70,509,000 and undivided profits of $23,353,000.

     (D)  VOTING AGREEMENT.  As a condition and an inducement to Heritage's
willingness to enter into this Plan, the directors and officers of the Bank and
the Company have entered into agreements in the forms attached to this Plan as
Exhibit A and Exhibit B, pursuant to which, among other things, each such
individual has agreed to vote his or her shares of Company Common Stock in favor
of approval of the actions contemplated by this Plan at the Meeting (as defined
Below) and to refrain from competing with Heritage and its Subsidiaries.

     (E)  RIGHTS, ETC.  Except as Previously Disclosed (as defined below) in
Schedule 4.1(C). or paragraph (A) of the Recitals to this Plan, or as authorized
by this Plan:  there are no shares of capital stock of the Company or the Bank
authorized and reserved for issuance; neither the Company nor the Bank has any
Rights (as defined below) issued or outstanding; and neither the Company or the
Bank has any commitment to authorize, issue or sell any such shares or any
Rights.  The term "Rights" means securities or obligations convertible into or
exchangeable for, or giving any Person any right to subscribe for or acquire, or
any options, calls or commitments relating to, shares of capital stock.  There
are no preemptive rights with respect to the Company Common Stock.

     (F) APPROVALS. At meetings of the respective Boards of Directors of the
Company, the Bank, and Heritage, each such Board has approved and authorized the
execution of this Plan in counterparts.
<PAGE>
 
     In consideration of their mutual promises and obligations, the Parties
further agree as follows:

                                  DEFINITIONS
                                        
     (A)  DEFINITIONS.  Capitalized terms used in this Plan have the following
meanings:

     "Appraisal Laws" has the meaning assigned to such term in Section 1.1(E).

     "Asset Classification" has the meaning assigned to such term in Section
4.1(T).
 
     "Bank" has the  meaning assigned to such term in the first paragraph of
this Plan.

     "Bank Common Stock" has the meaning assigned to such term in paragraph (B)
of the Recitals.

     "Bank Financial Reports" has the meaning assigned to such term in Section
4.1(H).

     "Capital" means capital stock, surplus and retained earnings determined in
accordance with GAAP.

     "Code" has the meaning assigned to such term in Section 4.1(Q)(2).

     "Company" has the meaning assigned to such term in the first paragraph to
this Plan.

     "Company Common Stock" has the meaning assigned to such term in paragraph
(A) of the Recitals.

     "Company Common Stock Conversion Ratio" has the meaning assigned to such
term in Section 2.1(F).

     "Company Option" means an Employee Option or Director Option that is vested
immediately prior to the Effective Date.

     "Company Option Conversion Ratio" has the meaning assigned to such term in
Section 2.1(E).

     "Company Optionholders" means holders of outstanding Company Options.

     "Company Shareholders" means holders of Company Common Stock.

     "Compensation and Benefit Plans" has the meaning assigned to such term in
Section 4.1(Q)(1).

     "Continuing Corporation" has the meaning assigned to such term in Section
1.1(A).

     "Continuing Employees" has the meaning assigned to such term in Section
8.9.

     "Department" means the Washington Department of Financial Institutions.

     "Derivatives Contract" means an exchange-traded or over-the-counter swap,
forward, future, option, cap, floor or collar financial contract or any other
contract that (1) is not included on the balance sheet of the Holding Company
Financial Reports or the Heritage Financial Reports, as the case may be, and (2)
is a derivative contract (including various combinations of the foregoing).

     "Director Options" has the meaning assigned to such term in paragraph (A)
of the Recitals.

     "Dissenting Shares" means the shares of Company Common Stock held by those
shareholders of the Company who have timely and properly exercised their
dissenters' rights in accordance with the Appraisal Laws.

     "Effective Date" has the meaning assigned to such term in Section 1.2.

     "Employee Options" has the meaning assigned to such term in paragraph (A)
of the Recitals.

                                       2
<PAGE>
 
     "Employment Agreement" means any of Exhibits D, E, F and G.

     "Environmental Law" means (1) any federal, state, and/or local law,
statute, ordinance, rule, regulation, code, license, permit, authorization,
approval, consent, legal doctrine, order, judgment, decree, injunction,
requirement or agreement with any governmental entity, relating to (a) the
protection, preservation or restoration of the environment (including air, water
vapor, surface water, groundwater, drinking water supply, surface land,
subsurface land, plant and animal life or any other natural resource) or to
human health or safety, or (b) the exposure to, or the use, storage, recycling,
treatment, generation, transportation, processing, handling, labeling,
production, release or disposal of hazardous Material, in each case as amended
and as now in effect, including the Federal Comprehensive Environmental
Response, Compensation, and Liability Act of 1980, the Superfund Amendments and
Reauthorization Act, the Federal Water Pollution Control Act of 1972, the
Federal Clean Air Act, the Federal Clean Water Act, the Federal Resource
Conservation and Recovery Act of 1976 (including the Hazardous and Solid Waste
Amendments thereto), the Federal Solid Waste Disposal and the Federal Toxic
Substances Control Act, and the Federal Insecticide, Fungicide and Rodenticide
Act, the Federal Occupational Safety and Health Act of 1970, and (2) any common
law or equitable doctrine (including injunctive relief and tort doctrines such
as negligence, nuisance, trespass and strict liability) that may impose
liability or obligations for injuries or damages due to, or threatened as a
result of, the presence of or exposure to any Hazardous Material.

     "ERISA" has the meaning assigned to such term in Section 4.1(Q)(2).

     "ERISA Affiliate" has the meaning assigned to such term in Section
4.1(Q)(3).

     "ERISA Plans" has the meaning assigned to such term in Section 4.1(Q)(2).

     "Exception Shares" means shares held by any of the Company's Subsidiaries
or by Heritage or any of its Subsidiaries, in each case other than in a
fiduciary capacity or as a result of debts previously contracted.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended,
together with the rules and regulations promulgated under such statute.

     "Exchange Agent" has the meaning assigned to such term in Section 2.6.

     "FDIC" means the Federal Deposit Insurance Corporation.

     "Financial Reports" has the meaning assigned to such term in Section
4.1(H).

     "Federal Reserve Board" means the Board of Governors of the Federal Reserve
System.

     "GAAP" means generally accepted accounting principles.

     "Hazardous Material" means any substance presently listed, defined,
designated or classified as hazardous, toxic, radioactive or dangerous, or
otherwise regulated, under any Environmental Law, whether by type or quantity,
including any oil or other petroleum product, toxic waste, pollutant
contaminant, hazardous substance, toxic substance, hazardous waste, special
waste or petroleum or any derivative or by-product thereof, radon, radioactive
material, asbestos, asbestos containing material, urea formaldehyde foam
insulation, lead and polychlorinated biphenyl.

     "Holding Company Financial Reports" has the meaning assigned to such term
in Section 4.1(H).

     "Indemnified Party" has the meaning assigned to such term in Section
5.18(A).

     "Heritage" has the meaning assigned to such term in the first paragraph of
the Plan.

     "Heritage Common Stock" has the meaning assigned to such term in paragraph
(c) of the Recitals.

                                       3
<PAGE>
 
     "Loan/Fiduciary Property" means any property owned or controlled by the
Company or any of its Subsidiaries or in which the Company or any of its
Subsidiaries holds a security or other interest, and where required by the
context, includes any such property where the Company or any of its Subsidiaries
constitutes the owner or operator of such property, but only with respect to
such property.

     "Material Adverse Effect" means, with respect to any Party, an event,
occurrence or circumstance (including (i) the making of any provisions for
possible loan and lease losses, write-downs or other real estate owned and
taxes, and (ii) any breach of a representation or warranty contained in this
Plan by such Party) that (a) has or is reasonably likely to have a material
adverse effect on the financial condition, results of operations, business or
prospects of such Party and its Subsidiaries, taken as a whole, or (b) would
materially impair such Party's ability to perform its obligations under this
Plan or the consummation of any of the transactions contemplated by this Plan.

     "Meetings" have the meaning assigned to such term in Section 5.2.

     "Merger" has the meaning assigned to such term in Section 1.1(A).

     "Merger Consideration" means the aggregate of the shares of Heritage Common
Stock issuable pursuant to the Merger.

     "Multiemployer Plans" has the meaning assigned to such term in Section
4.1(Q)(2).

     "NASDAQ" means the National Association of Securities Dealers Automated
Quotations system.

     "OCC" means the Office of the Comptroller of the Currency, the regulator of
national banks.

     "Option Conversion Shares" has the meaning assigned to such term in Section
2.1(B).

     "Participation Facility" means any facility in which the Company or any of
its Subsidiaries participates in the management and, where required by the
context, includes the owner or operator of such facility.

     "Party" means a party to this Plan.
 
     "Pension Plan" has the meaning assigned to such term in Section 4.1(Q)(2).

     "Person" means any individual, corporation (including any non-profit
corporation), general or limited partnership, limited liability company, joint
venture, estate, trust, association, organization, labor union, governmental
body, or other entity.

     "Plan" means this Agreement and Plan of Merger.

     "Previously Disclosed" with respect to information, means that the
information is provided by a Party in a Schedule that is delivered
contemporaneously with the execution of this Plan.

     "Proxy Statement" has the meaning assigned to such term in Section 5.2.

     "Registration Statement" has the meaning assigned to such term in Section
5.2.

     "Regulatory Authorities" means federal or state governmental agencies,
authorities or departments  charged with the supervision or regulation of
depository institutions or engaged in the insurance of deposits.

     "RCW" means the Revised Code of Washington, as amended.

     "Rights" has the meaning assigned to such term in paragraph (E) of the
Recitals.

     "Securities Act" means the Securities Act of 1933, as amended, together
with the rules and regulations promulgated under such statute.

                                       4
<PAGE>
 
     "SEC" means the Securities and Exchange Commission.

     "Share Conversion Ratio" has the meaning assigned to such term in Section
2.1(F).

     "Subsidiary" means, with respect to any entity, each partnership, limited
liability company, or corporation the majority of the outstanding partnership
interests, membership interests, capital stock or voting power of which is (or
upon the exercise of all outstanding warrants, options and other rights would
be) owned, directly or indirectly, at the time in question by such entity.

     "Tax Returns" has the meaning assigned to such term in Section 4.1(AA).

     "Taxes" means federal, state, local or foreign income, gross receipts,
windfall profits, severance, property, production, sales, use, license, excise,
franchise, employment, withholding or similar taxes imposed on the income,
properties or operations of the respective Party or its Subsidiaries, together
with any interest, additions, or penalties relating to such taxes and any
interest charged on those additions or penalties.

     "Third Party" means a person within the meaning of Section 3(a)(9) and
13(d)(3) of the Exchange Act, excluding (1) the Company or any Subsidiary of the
Company, and (2) Heritage or any Subsidiary of Heritage.

     (B)  GENERAL INTERPRETATION.  Except as otherwise expressly provided in
this Plan or unless the context clearly requires otherwise, the terms defined in
this Plan include the plural as well as the singular; the words "hereof,"
"herein," "hereunder," "in this Plan" and other words of similar import refer to
this Plan as a whole and not to any particular Article, Section or other
subdivision; and references in this Plan to Articles, Section, Schedules, and
Exhibits refer to Articles and Sections of and Schedules and Exhibits to this
Plan. Whenever the words "include," "includes," or "including" are used in this
Plan, they shall be deemed to be followed by the words "without limitation."
Unless otherwise stated, references to Subsections refer to the Subsections of
the Section in which the reference appears. All pronouns used in this Plan
include the masculine, feminine and neuter gender, as the context requires. All
accounting terms used in this Plan that are not expressly defined in this Plan
have the respective meanings given to them in accordance with GAAP.

                               ARTICLE I. MERGER
                                        
     1.1  THE MERGER. Subject to the provisions of this Plan, on the
Effective Date:

          (A)  THE CONTINUING CORPORATION.  In accordance with the terms of RCW
Ch. 23B.11, the Company shall merge into Heritage (the "Merger"), the separate
existence of the Company shall cease and Heritage (the "Continuing Corporation")
shall survive, and the name of the Continuing Corporation shall be "Heritage
Financial Corporation."

          (B)  RIGHTS, ETC.  Upon consummation of the Merger, the Continuing
Corporation shall possess all of the rights, privileges, immunities and
franchises, of a public as well as of a private nature, of each of the merging
corporations; and all property, real, personal and mixed, and all debts due on
whatever account, and all other choses in action, and all and every other
interest, of or belonging to or due to each of the corporations so merged, shall
be deemed to be vested in the Continuing Corporation without further act or
deed; and the title to any real estate or any interest therein, vested in each
of such corporations, shall not revert or be in any way impaired by reason of
the Merger.

          (C)  LIABILITIES.  The Continuing Corporation shall be responsible and
liable for all the liabilities, obligations and penalties of each of the
corporations so merged.

          (D)  ARTICLES OF INCORPORATION; BY LAWS; DIRECTORS; OFFICERS.  The
Articles of Incorporation and Bylaws of the Continuing Corporation shall be
those of Heritage, as in effect immediately prior to the Merger becoming
effective.  The directors and officers of Heritage in office immediately prior
to the Merger becoming effective shall be the directors and officers of the
Continuing Corporation, who shall hold office until such time as their
successors are elected and qualified, except that the Board of Directors of
Heritage shall be expanded by one position immediately after the Effective Date
of the Merger and an outside (non-

                                       5
<PAGE>
 
management) director of the Company who resides in eastern Washington as
recommended by the Company shall be appointed by the Board of Directors of
Heritage to fill that position.

          (E)  DISSENTING SHARES.  Notwithstanding anything to the contrary in
this Plan, each Dissenting Shareholder who, as of the Effective Date of the
Merger, has not effectively withdrawn or lost his dissenters' rights under RCW
23B.13 (the "Appraisal Laws") shall not be converted into or represent a right
to receive any of the Merger Consideration, but the holder of such Dissenting
Share shall be entitled only to such rights as are granted by the Appraisal
Laws, unless and until such holder shall have failed to perfect or shall have
effectively withdrawn or lost the right to payment under the Appraisal Laws, in
which case each such share shall be deemed to have been converted at the
Effective Date into his or her portion of the Merger Consideration.  Each holder
of Dissenting Shares who becomes entitled to payment for his Company Common
Stock pursuant to the provisions of the Appraisal laws shall receive payment for
such Dissenting Shares from the Company (but only after the amount thereof shall
have been agreed upon or finally determined pursuant to the Appraisal Laws).

     1.2  EFFECTIVE DATE.  Unless the Parties agree upon another date, the
"Effective Date" of the Merger will be the tenth business day after the
fulfillment or waiver of each condition precedent set forth in, and the granting
of each approval (and expiration of any waiting period) required by, Article VI.
A business day is any day other than a Saturday, Sunday or legal holiday in the
State of Washington.  If the Merger is not consummated in accordance with this
Plan on or prior to April 30, 1999, the Company or Heritage may terminate this
Plan in accordance with Article VII.  On the Effective Date, Heritage and the
Company shall execute and deliver to the Secretary of State of the State of
Washington articles of merger in accordance with applicable law.

                           ARTICLE II. CONSIDERATION
                                        
     2.1  EFFECT ON COMPANY COMMON STOCK AND COMPANY OPTIONS.  Subject to the
provisions of this Plan, on the Effective Date, by virtue of the Merger and
without any action on the part of Heritage or the Company:

          (A)  CONVERSION OF COMPANY COMMON STOCK AND COMPANY OPTIONS.  The
purchase price paid by Heritage to the holders of Company Common Stock ("Company
Shareholders") and holders of Company Options ("Company Optionholders") (the
"Merger Consideration") shall be:

     (1)  if the Average Closing Price (as defined below) of Heritage Common
          Stock is more than $12.25, 1,000,000 shares of Heritage Common Stock;
          or

     (2)  if the Average Closing Price (as defined below) of Heritage Common
          Stock is $12.25 or below, but no less than $10.00, 1,000,000 shares of
          Heritage Common Stock plus that number of shares of Heritage Common
          Stock equal to the product (rounded to the next whole share) of the
          following formula:

               [($12.25 minus Average Closing Price) divided by $2.25]
               multiplied by 50,000; or

     (3)  if the Average Closing Price (as defined below) of Heritage Common
          Stock is below $10.00 and if Heritage makes an election under Section
          7.1(E) of this Plan to consummate the Plan following the Company's
          written notice of termination under Section 7.1(E) of this Plan, the
          Merger Consideration shall be that number of shares of Heritage Common
          Stock equal to the sum (rounded to the next whole share) of the
          following formula:

               ($10,000,000 divided by Average Closing Price) plus 50,000; or

     (4)  if the Average Closing Price (as defined below) of Heritage Common
          Stock is below $10.00 and if the Company does not provide written
          notice of termination under Section 7.1(E) of this Plan, 1,050,000
          shares of Heritage Common Stock.

All of the issued and outstanding shares of Company Common Stock, other than
Dissenting Shares and Exception Shares, and all outstanding Company Options
shall be converted into the right to receive a portion of the Merger

                                       6
<PAGE>
 
Consideration based upon each Company Shareholder's and Company Optionholder's
ownership of the total number of issued and outstanding shares of Company Common
Stock and outstanding Company Options immediately prior to the Effective Date,
as described in Subsections (E) and (F) below.

For purposes of this Plan, the following terms shall have the means indicated:

"Average Closing Price" means the average of the last reported sale prices per
share of Heritage Common Stock as reported on The Nasdaq Stock Market or such
successor exchange on which Heritage Common Stock may then be traded (as
reported in The Wall Street Journal or, if not reported therein, in another
mutually agreed upon authoritative source) for the 45 consecutive trading days
on The Nasdaq Stock Market or such successor exchange on which Heritage Common
Stock may then be traded ending at the close of trading on the Determination
Date.

"Determination Date" means the date occurring 5 days prior to the Effective
Date.

          (B)  FRACTIONAL SHARES.  Fractional shares of Heritage Common Stock
shall not be issued.  Any Company Shareholder or Company Optionholder entitled
to receive a fractional share shall receive a cash payment in lieu thereof equal
to the value of the fractional share based on the average sales price per share
of Heritage Common Stock for all trades occurring on NASDAQ during the period of
ten (10) trading days on which one or more trades take place and which ends
immediately prior to the fifth day prior to the Effective Date ("Pricing
Average").

          (C)  CANCELLATION OF COMPANY COMMON STOCK AND COMPANY OPTIONS.  All
shares of Company Common Stock issued and outstanding and all Employee Options
and Director Options outstanding immediately prior to the Effective Date shall
no longer be outstanding and shall automatically be cancelled and retired and
shall cease to exist as of the Effective Date, and each holder of a certificate
or other documentation representing any such shares of Company Common Stock or
Company Options shall cease to have any rights with respect thereto, except the
right to receive the portion of the Merger Consideration applicable to such
shares or Company Options in consideration therefor upon surrender of such
certificate or other documentation in accordance with the Plan, without
interest, or, if applicable, cash in accordance with the Appraisal Laws.  After
the Effective Date, there shall be no transfers on the stock transfer books of
the Company or the Continuing Corporation of the shares of Company Common Stock
that were issued and outstanding immediately prior to the Effective Date.

          (D)  ANTI-DILUTION.  If prior to the Effective Date, shares of
Heritage Common Stock or Company Common Stock shall be changed into a different
number of shares by reason of any reclassification, recapitalization, split-up,
combination, exchange of shares, readjustment or similar transactions, or if a
stock dividend shall be declared, appropriate and proportionate adjustment or
adjustments will be made in the conversion ratios set forth in this Section 2.1.

          (E)  COMPANY OPTION CONVERSION RATIO.  Each Company Option outstanding
immediately prior to the Effective Date shall be converted into the right to
receive that number of shares of Heritage Common Stock equal to the quotient of
the following formula (because the outstanding Company Options are convertible
into shares of Company Common Stock at varying exercise prices, this formula is
to be applied on a Company Option per Company Option basis, each application
thereof producing a "Company Option Conversion Ratio"):

     (Company Common Stock Value minus Exercise Price of a Company Option)
     divided by Pricing Average

The  Company Common Stock Value is determined by solving for (x) in the
following equation:

     A(x) + B(x-y) = C(z)

          Where:

     A = number of outstanding shares of Company Common Stock immediately prior
         to the Effective Date
     B = number of outstanding Company Options immediately prior to the
         Effective Date
     C = Merger Consideration as determined under Section 2.1(A) of this Plan

                                       7
<PAGE>
 
     x = Company Common Stock Value
     y = weighted average exercise price of outstanding Company Options
         immediately prior to the Effective Date
     z = Pricing Average as defined in Section 2.1(B), above

To determine the aggregate value of all Company Options outstanding immediately
prior to the Effective Date, the Company Common Stock Value is reduced by the
weighted average exercise price of the Company Options outstanding immediately
prior to the Effective Date and that difference is multiplied by the number of
Company Options outstanding immediately prior to the Effective Date.  The number
of shares of Heritage Common Stock to be issued in the aggregate to the Company
Optionholders as of the Effective Date (the "Option Conversion Shares") will be
equal to the quotient of the aggregate value of all Company Options outstanding
immediately prior to the Effective Date (computed as described in the preceding
sentence) divided by the Pricing Average.

          (F)  COMPANY COMMON STOCK CONVERSION RATIO.  The total number of
Option Conversion Shares shall be subtracted from the Merger Consideration and
the resulting difference shall be divided by the number of shares of Company
Common Stock outstanding immediately prior to the Effective Date the quotient of
which shall be the Company Common Stock Conversion Ratio. The number of shares
of Company Common Stock held by each Company Shareholder immediately prior to
the Effective Date shall be multiplied by the Company Common Stock Conversion
Ratio to determine the number of shares of Heritage Common Stock to be received
by each Company Shareholder.

     2.2  EXCHANGE PROCEDURES.  As promptly as practicable after the Effective
Date, Heritage shall send or cause to be sent to each former Company Shareholder
and Company Optionholder of record immediately prior to the Effective Date
transmittal materials for use in exchanging such shareholder's certificates for
Company Common Stock and Company Options for the consideration set forth in this
Article II.  The certificates representing the shares of Heritage Common Stock
into which shares of such Company Shareholder's Company Common Stock and such
Company Optionholder's Company Options are converted on the Effective Date, any
fractional share or check that such shareholder or optionholder shall be
entitled to receive, and any dividends paid on such shares of Heritage Common
Stock for which the record date for determination of shareholders entitled to
such dividends is on or after the Effective Date, will be delivered to such
shareholder or optionholder only upon delivery to Heritage's exchange agent (the
"Exchange Agent") of the certificates representing all of such shares of Company
Common Stock (or indemnity satisfactory to Heritage and the Exchange Agent, in
their judgment, if any of such certificates are lost, stolen or destroyed) and
documentary evidence satisfactory to Heritage and the Exchange Agent of the
holding of Company Options.  No interest will be paid on any such fractional
share check or dividends to which the holder of such shares or options shall be
entitled to receive upon such delivery.  Certificates or options surrendered for
exchange by any person constituting an "affiliate" of the Company for purposes
of Rule 145 of the Securities Act shall not be exchanged for certificates
representing Heritage Common Stock until Heritage has received a written
agreement from such person as specified in Section 5.10.

     2.3  EXCEPTION SHARES.  Each of the Exception Shares of Company Common
Stock shall be canceled and retired upon consummation of the Merger, and no
consideration shall be issued in exchange therefor.

     2.4  RESERVATION OF RIGHT TO REVISE TRANSACTION.  In its sole discretion,
and notwithstanding any other provision in this Plan to the contrary, Heritage
may at any time change the method of effecting its acquisition of the Company
and the Bank; provided, however, that (A) no such change shall alter or change
the amount or kind of consideration to be issued to  holders of Company Common
Stock or Company Options as provided for in this Plan, (B) no such change shall
adversely affect the tax treatment to the Company Shareholders as a result of
receiving such consideration, and (C) no delay caused by such a change shall be
the basis upon which Heritage terminates this Plan pursuant to Section 7.1(C).
If Heritage elects to change the method of acquisition, the Company and the Bank
will cooperate with and assist Heritage with any necessary amendment to this
Plan, and with the preparation and filing of such applications, documents,
instruments and notices as may be necessary or desirable, in the opinion of
counsel for Heritage, to obtain all necessary shareholder approvals and
approvals of any regulatory agency, administrative body or other governmental
entity.

                                       8
<PAGE>
 
                   ARTICLE III. ACTIONS PENDING CONSUMMATION
                                        
     Unless otherwise agreed to in writing by Heritage, each of the Company and
the Bank shall conduct its and each of its Subsidiaries' business in the
ordinary and usual course consistent with past practice and shall use its best
efforts to maintain and preserve its and each of its Subsidiaries' business
organization, employees and advantageous business relationships and retain the
services of its and each of its Subsidiaries' officers and key employees

identified by Heritage, and neither the Company nor the Bank, without the prior
written consent of Heritage, will (or cause or allow any of its Subsidiaries
to):

     3.1  CAPITAL STOCK.  Except for or as otherwise expressly permitted by this
Plan, or Company Options, or as Previously Disclosed in Schedule 4.1(C), issue,
sell or otherwise permit to become outstanding any additional shares of capital
stock of the Company, the Bank or any of their Subsidiaries, or any Rights with
respect thereto, or enter into any agreement with respect to the foregoing, or
permit any additional shares of Company Common Stock to become subject to grants
of Employee Options or Director Options, stock appreciation rights or similar
stock-based employee or director compensation rights.

     3.2  DIVIDENDS, ETC.  Except as set forth on Schedule 3.2, make, declare or
pay any dividend on or in respect of, or declare or make any distribution on, or
directly or indirectly combine, redeem, reclassify, purchase or otherwise
acquire, any shares of its capital stock or, other than as permitted in or
contemplated by this Plan, authorize the creation or issuance of , or issue, any
additional shares of its capital stock or any Rights with respect thereto.

     3.3  INDEBTEDNESS; LIABILITIES; ETC.  Except as set forth on Schedule 3.3,
other than in the ordinary course of business consistent with past practice,
incur any indebtedness for borrowed money, assume, guarantee, endorse or
otherwise as an accommodation become responsible or liable for the obligations
of any other individual, corporation or other entity; provided, however, the
Company shall incur no indebtedness for borrowed money or engage in any of the
actions described in this Section 3.3.

     3.4  LINE OF BUSINESS; OPERATING PROCEDURES; ETC.  Except as may be
directed by any regulatory agency, (A) change its lending, investment, liability
management or other material banking policies in any material respect, except
such changes as are in accordance and in an effort to comply with Section 5.11,
or (B) commit to incur any further capital expenditures beyond those Previously
Disclosed in Schedule 3.4 other than in the ordinary course of business and not
exceeding $25,000 individually or $100,000 in the aggregate prior to the
Effective Date.

     3.5  LIENS AND ENCUMBRANCES.  Impose, or suffer the imposition, on any
shares of stock of any of its Subsidiaries, any lien, charge or encumbrance, or
permit any such lien, charge or encumbrance to exist.

     3.6  COMPENSATION; EMPLOYMENT AGREEMENTS; ETC.  Except as Previously
Disclosed in Schedule 3.6, enter into or amend any employment, severance or
similar agreement (other than the Employment Agreements) or arrangement with any
of its directors, officers or employees, or grant any salary or wage increase,
amend the terms of any Company Option or increase any employee benefit
(including incentive or bonus payments), except normal individual increases (not
exceeding 5% for any employee of Company or Bank whose salary is $25,000 or
more) in regular compensation to employees in the ordinary course of business
consistent with past practice.

     3.7  BENEFIT PLANS.  Except as Previously Disclosed in Schedule 3.7 and
except as expressly contemplated by the Employment Agreements, enter into or
modify (except as may be required by applicable law) any pension, retirement,
stock option, stock purchase, savings, profit sharing, deferred compensation,
consulting, bonus, group insurance or other employee benefit, incentive or
welfare contract, plan or arrangement, or any trust agreement related thereto,
in respect of any of its directors, officers or other employees, including
taking any action that accelerates the vesting or exercise of any benefits
payable thereunder.

     3.8  CONTINUANCE OF BUSINESS.  Dispose of or discontinue any portion of its
assets, business or properties, that is material to the Company and its
Subsidiaries taken as a whole, or merge or consolidate with, or acquire all or
any portion of, the business or property of any other entity that is material to
the Company and its

                                       9
<PAGE>
 
Subsidiaries taken as a whole (except foreclosures or acquisitions by the Bank
in its fiduciary capacity, in each case in the ordinary course of business
consistent with past practice).

     3.9   AMENDMENTS.  Amend its articles of incorporation or bylaws.

     3.10  CLAIMS.  Settle any claim, litigation, action or proceeding involving
any liability for money damages or restrictions upon the operations of the
Company or any of its Subsidiaries.

     3.11  CONTRACTS.  Except as previously disclosed on Schedule 3.11, enter
into, renew, terminate or make any change in any material contract, agreement or
lease, except in the ordinary course of business consistent with past practice
with respect to contracts, agreements and leases that are terminable by it
without penalty on no more than 60 days prior written notice.

     3.12  LOANS.  Extend credit or account for loans and leases other than in
accordance with existing lending policies and accounting practices, except that
the Bank shall not, without the prior consent of Heritage's Chief Executive
Officer or Chief Financial Officer, make any new loan or modify, restructure or
renew any existing nonperforming loan (defined as on non-accrual status, or 90
days or more past due) to any borrower if the amount of the resulting loan, when
aggregated with all other loans or extension of credit to such Person (or which
would be required to be aggregated for loans-to-one-borrower limitations), would
be in excess of $350,000 for any new customer or $350,000 to any customer as of
the date of this Plan, except that (i) single-family residential loans may be
made in amounts that would not exceed applicable FHLMC and FNMA limits, and (ii)
such limits shall not apply to SBA, FmHA, USDA Rural Development or other
governmental or governmental agency guaranteed amounts.

     3.13  TRANSACTION EXPENSES.  Incur expenses in connection with the
transactions contemplated by this Plan that exceed the amounts set forth in
Schedule 3.13.

                  ARTICLE IV. REPRESENTATIONS AND WARRANTIES

     4.1  THE COMPANY AND THE BANK REPRESENTATIONS AND WARRANTIES.  Each of the
Company and the Bank hereby represents and warrants to Heritage as follows:

          (A)  RECITALS.  The facts set forth in the Recitals of this Plan with
respect to the Company and its Subsidiaries are true and correct.

          (B)  ORGANIZATION, STANDING AND AUTHORITY.  Each of the Company and
its Subsidiaries is duly qualified to do business and is in good standing in the
States of the United States and foreign jurisdictions where the failure to be
duly qualified, individually or in the aggregate, is reasonably likely to have a
Material Adverse Effect on it. Each of the Company and its Subsidiaries has in
effect all federal, state, local and foreign government authorizations necessary
for it to own or lease its properties and assets and to carry on its business as
it is now conducted, the absence of which, individually or in the aggregate, is
reasonably likely to have a Material Adverse Effect on it. The Bank is an
"insured depository institution" as defined in the Federal Deposit Insurance
Act, as amended, and applicable regulations under such statute, and its deposits
are insured by the Bank Insurance Fund of the FDIC.

          (C)  SHARES.  The outstanding shares of the Company and its
Subsidiaries' capital stock are validly issued and outstanding, fully paid and
nonassessable (except for the application of 12 U.S.C. (S)55 to the shares of
Bank Common Stock), and subject to no preemptive rights. Except as Previously
Disclosed in Schedule 4.1(C) and paragraph (A) of the Recitals, there are no
shares of capital stock or other equity securities of the Company or its
Subsidiaries outstanding and no outstanding Rights with respect thereto.

          (D)  THE COMPANY SUBSIDIARIES.  The Company has Previously Disclosed
in Schedule 4.1(D) a list of all of its Subsidiaries. Each of its Subsidiaries
that is a bank is an "insured depository institution" as defined in the Federal
Deposit Insurance Act, as amended, and applicable regulations under such
statute. No equity securities of any of its Subsidiaries are or may become
required to be issued (other than to the Company or one of its Subsidiaries) by
reason of any Rights with respect thereto. There are no contracts, commitments,
understandings or arrangements by which any of its Subsidiaries is or may be
bound to sell or otherwise issue any shares of such Subsidiary's capital stock,
and there are no contracts, commitments, understandings or arrangements relating
to the

                                      10
<PAGE>
 
rights of the Company or its Subsidiaries, as applicable, to vote or to dispose
of such shares. All of the shares of capital stock of each of its Subsidiaries
held by the Company or one of its Subsidiaries are fully paid and nonassessable
and are owned by the company or one of its Subsidiaries free and clear of any
charge, mortgage, pledge, security interest, restriction, claim, lien or
encumbrance. Each of its Subsidiaries is in good standing under the laws of the
jurisdiction in which it is incorporated or organized, and is duly qualified to
do business and in good standing in the jurisdictions where the failure to be
duly qualified is reasonably likely, individually or in the aggregate, to have a
Material Adverse Effect on it. Except as Previously Disclosed in Schedule
4.1(D), it does not own beneficially, directly or indirectly, any shares of any
equity securities or similar interests of any corporation, bank, partnership,
joint venture, business trust, association or other organization. In the case of
representations by the Company, the deposits of its Subsidiaries that are banks
are insured by the Bank Insurance Fund of the FDIC.

          (E)  CORPORATE POWER.  Each of the Company and its Subsidiaries has
the corporate power and authority to carry on its business as it is now being
conducted and to own all its material properties and assets.

          (F)  CORPORATE AUTHORITY.  Subject to the receipt of approval by its
shareholders referred to in Section 6.1, this Plan has been authorized by all
necessary corporate action of the Company and each of its Subsidiaries that is a
Party, and is a valid and binding agreement of the Company and such
Subsidiaries, enforceable against the Company and such Subsidiaries in
accordance with its terms, subject to bankruptcy, insolvency and other laws of
general applicability relating to or affecting creditors' rights and to general
equity principles.

          (G)  NO DEFAULTS.  Subject to the approval by its shareholders
referred to in Section 6.1, the required regulatory approvals referred to in
Section 6.1, and the required filings under federal and state securities laws,
and except as Previously Disclosed in Schedule 4.1(G), the execution, delivery
and performance of this Plan and the consummation by the Company and each of its
Subsidiaries that is a Party to the transactions contemplated by this Plan do
not and will not (1) constitute a breach or violation of, or a default under,
any law, rule or regulation or any judgment, decree, order, governmental permit
or license, or agreement, indenture or instrument of the Company or of any of
its Subsidiaries or to which the Company or any of its Subsidiaries or its or
their properties is subject or bound, which breach, violation or default is
reasonably likely, individually or in the aggregate, to have a Material Adverse
Effect on it, (2) constitute a breach or violation of, or a default under, the
articles of incorporation, charter or bylaws of it or any of its Subsidiaries,
or (3) require any consent or approval under any such law, rule, regulation,
judgment, decree, order, governmental permit or license or the consent or
approval of any other party to any such agreement, indenture or instrument,
other than any such consent or approval that, if not obtained, would not be
reasonably likely, individually or in the aggregate, to have a Material Adverse
Effect on it.

          (H)  FINANCIAL REPORTS.  Except as Previously Disclosed in Schedule
4.1(H), (1) as to the Company, its audited consolidated balance sheet as of
December 31, 1997 and the related statements of income, changes in shareholders'
equity and cash flows for the fiscal year ended December 31, 1997 (collectively,
the "Holding Company Financial Reports"), and (2) as to each of the Company's
Subsidiaries that is a bank, its call report for the fiscal year ended December
31, 1997, and all other financial reports filed or to be filed subsequent to
December 31, 1997, in the form filed with the OCC (in each case, the "Bank
Financial Reports" and together with the Holding Company Financial Reports, the
"Financial Reports") did not and will not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements made therein, in light of the circumstances
under which they were made, not misleading; and each of the balance sheets in or
incorporated by reference into the Financial Reports (including the related
notes and schedules thereto) fairly presents and will fairly present the
financial position of the entity or entities to which it relates as of its date,
and each of the statements of income and changes in shareholders' equity and
cash flows or equivalent statement since the Bank Financial Reports (including
any related notes and schedules thereto) fairly presents and will fairly present
the results of operations, changes in shareholders' equity and cash flows, as
the case may be, of the entity or entities to which it relates for the periods
set forth therein, in each case for the Holding Company Financial Reports in
accordance with GAAP during the periods involved, and in each case for the Bank
Financial Reports in accordance with regulatory accounting principles during the
periods involved, except in each case as may be noted therein, subject to normal
and recurring year-end audit adjustments in the case of unaudited statements.

                                      11
<PAGE>
 
          (I)  ABSENCE OF UNDISCLOSED LIABILITIES.  Except as Previously
Disclosed on Schedule 4.1(I), neither the Company nor any of its Subsidiaries
has any obligation or liability (contingent or otherwise) that, individually or
in the aggregate, is reasonably likely to have a Material Adverse Effect on it,
except (1) as reflected in its Holding Company Financial Reports prior to the
date of this Plan, and (2) for commitments and obligations made, or liabilities
incurred, in the ordinary course of business consistent with past practice since
December 31, 1997. Except as Previously Disclosed on Schedule 4.1(I), since
December 31, 1997, neither the Company nor any of its Subsidiaries has incurred
or paid any obligation or liability (including any obligation or liability
incurred in connection with any acquisitions in which any form of direct
financial assistance of the federal government or any agency thereof has been
provided to any Subsidiary) that, individually or in the aggregate, is
reasonably likely to have a Material Adverse Effect on it.

          (J)  NO EVENTS.  Except as Previously Disclosed on Schedule 4.1(J),
since December 31, 1997, no event has occurred that, individually or in the
aggregate, is reasonably likely to have a Material Adverse Effect on Company or
the Bank.

          (K)  PROPERTIES.  Except as reserved against in its Holding Company
Financial Reports, the Company and each of its Subsidiaries have good and
marketable title, free and clear of all liens, encumbrances, charges, defaults,
or equities of any character, to all of the properties and assets, tangible and
intangible, reflected in its Holding Company Financial Reports as being owned by
the Company or its Subsidiaries as of the dates thereof other than those that,
individually or in the aggregate, are not reasonably likely to have a Material
Adverse Effect on it, except those sold or otherwise disposed of in the ordinary
course of business.  All buildings and all material fixtures, equipment, and
other property and assets that are held under leases or subleases by the Company
or any of its Subsidiaries are held under valid leases or subleases enforceable
in accordance with their respective terms, other than any such exceptions to
validity or enforceability that, individually or in the aggregate, are not
reasonably likely to have a Material Adverse Effect on it.

          (L)  LITIGATION; REGULATORY ACTION.  Except as Previously Disclosed in
Schedule 4.1(L), no litigation, proceeding or controversy before any court or
governmental agency is pending that, individually or in the aggregate, is
reasonably likely to have a Material Adverse Effect on the Company or any of it
Subsidiaries or that alleges claims under any fair lending law or other law
relating to discrimination, including the Equal Credit Opportunity Act, the Fair
Housing Act, the Community Reinvestment Act and the Home Mortgage Disclosure
Act, and, to the best of its knowledge, no such litigation, proceeding or
controversy has been threatened; and except as Previously Disclosed in Schedule
4.1(L), neither the Company nor any of its Subsidiaries or any of its or their
material properties  or their officers, directors or controlling persons is a
party to or is subject to any order, decree, agreement, board resolution,
memorandum of understanding or similar arrangement with, or a commitment letter
or similar submission to, any Regulatory Authority, and neither the Company nor
any of its Subsidiaries has been advised by any of such Regulatory Authorities
that such authority is contemplating issuing or requesting (or is considering
the appropriateness of issuing or requesting) any such order, decree, agreement,
board resolution, memorandum or understanding, commitment letter or similar
submission.

          (M)  COMPLIANCE WITH LAWS.  Except as Previously Disclosed in Schedule
4.1(M), each of the Company and its Subsidiaries:

               (1)  has all permits, licenses, authorizations, orders and
approvals of, and has made all filing, applications and registrations with, all
Regulatory Authorities that are required in order to permit it to own its
businesses presently conducted and that are material to the business of it and
its Subsidiaries taken as a whole; all such permits, licenses, certificates of
authority, orders and approvals are in full force and effect and, to its best
knowledge, no suspension or cancellation of any of them is threatened; and all
such filings, applications and registrations are current;

               (2)  has received no notification or communication from any
Regulatory Authority or the staff thereof (a) asserting that the Company or any
of its Subsidiaries is not in compliance with any of the statutes, regulations
or ordinances which such Regulatory Authority enforces, which, as a result of
such noncompliance in any such instance, individually or in the aggregate, is
reasonably likely to have a Material Adverse Effect on the Company or its
Subsidiaries, (b) threatening to revoke any license, franchise, permit or
governmental authorization, which revocation, individually or in the aggregate,
is reasonably likely to have a Material Adverse Effect on the Company or its
Subsidiaries, or (c) requiring any of the Company or its Subsidiaries

                                      12
<PAGE>
 
(or any of its or their officers, directors or controlling persons) to enter
into a cease and desist order, agreement or memorandum of understanding (or
requiring the board of directors thereof to adopt any resolution or policy);

               (3)  is not required to give prior notice to any federal banking
or thrift agency of the proposed addition of an individual to its board of
directors or the employment of an individual as a senior executive;

               (4)  is in compliance in all material respects with all fair
lending laws or other laws relating to discrimination, including the Equal
Credit Opportunity Act, the Fair Housing Act, the Community Reinvestment Act and
the Home Mortgage Disclosure Act; and

               (5)  has adopted and is implementing a program to address any
problems associated with the capacity and capability of the computer software,
hardware, code and programs utilized by the Company, its Subsidiaries and their
vendors to properly process transactions after December 31, 1999.

          (N)  MATERIAL CONTRACTS.  Except as Previously Disclosed in Schedule
4.1(N), none of the Company or its Subsidiaries, nor any of their respective
assets, businesses or operations, is a party to, or is bound or affected by, or
receives benefits under, any contract or agreement which is a "material
contract" within the meaning of Item 601(b)(10) of Regulation S-K promulgated by
the SEC. Neither the Company nor any of its Subsidiaries is in default under any
contract, agreement, commitment, arrangement, lease, insurance policy or other
instrument to which it is a party, by which its respective assets, business or
operations may be bound or affected or under which it or any of its respective
assets, business or operations receives benefits, which default individually or
in the aggregate, is reasonably likely to have a Material Adverse Effect on the
Company or its Subsidiaries, and there has not occurred any event in connection
with any material contract, agreement or amendment thereto, that with the lapse
of time or the giving notice or both, would constitute such a default. Except as
Previously Disclosed in Schedule 4.1(N), neither the Company nor any of its
Subsidiaries is subject to or bound by any contract containing covenants that
limit the ability of the Company or any of its Subsidiaries to compete in any
line of business or with any Person or that involve any restriction of
geographical area in which, or method by which, the Company or any of its
subsidiaries may carry on its business (other than as may be required by law or
any applicable Regulatory Authority).

          (O)  REPORTS.  Since January 1, 1993, each of the Company and its
Subsidiaries has filed all reports and statements, together with any amendments
required to be made with respect thereto; that it was required to file with (1)
the Department, (2) the OCC, (3) the Federal Reserve Board, and (4) any other
Regulatory Authorities having jurisdiction with respect to the Company and its
Subsidiaries.  As of their respective dates (and without giving effect to any
amendments or modifications filed after the date of this Plan with respect to
reports and documents filed before the date of this Plan), each of such reports
and documents, including the financial statements, exhibits and schedules
thereto, complied in all material respects with all of the statutes, rules and
regulations enforced or promulgated by the Regulatory Authority with which they
were filed and did not contain any untrue statement of a material fact or omit
to state any material fact necessary in order to make the statements made
therein, in light of the circumstances under which they were made, not
misleading.

          (P)  NO BROKERS.  All negotiation relative to this Plan and the
transactions contemplated by this Plan have been carried on by it directly with
the other Parties and no action has been taken by it that would give rise to any
valid claim against any party for a brokerage commission, finder's fee or other
like payment.

          (Q)  EMPLOYEE BENEFIT PLANS.

               (1)  Schedule 4.1(Q)(1) contains a complete list of all bonus,
deferred compensation, pension, retirement, profit-sharing, thrift savings,
employee stock ownership, stock bonus, stock purchase, restricted stock and
stock option plans, all employment or severance contracts, all medical, dental,
health and life insurance plans, all other employee benefit plans, contracts or
arrangements and any applicable "change of control" or similar provisions in any
plan, contract or arrangement maintained or contributed to by the Company or any
of its Subsidiaries for the benefit of employees, former employees, directors,
former directors or their beneficiaries (the "Compensation and Benefit Plans").
True and complete copies of all Compensation and Benefit Plans of the Company
and its Subsidiaries, including any trust instruments and/or insurance
contracts, if any, forming a part thereof, and all amendments thereto, have been
supplied to the other Parties.

                                      13
<PAGE>
 
               (2)  All "employee benefit plans" within the meaning of Section
3(3) of the Employee Retirement Income Security Act of 1974, as amended
("ERISA"), other than "multiemployer plans" within the meaning of Section 3(37)
of ERISA ("Multiemployer Plans"), covering employees or former employees of the
Company and it Subsidiaries (the "ERISA Plans"), to the extent subject to ERISA,
are in substantial compliance with ERISA. Except as Previously Disclosed in
Schedule 4.1(Q)(2) each ERISA Plan which is an "employee pension benefit plan"
within the meaning of Section 3(2) of ERISA ("Pension Plan") and which is
intended to be qualified under Section 401(a) of the Internal Revenue Code of
1986 (as amended, the "Code) has received a favorable determination letter from
the Internal Revenue Service, and it is not aware of any circumstances
reasonably likely to result in the revocation or denial of any such favorable
determination letter or the inability to receive such a favorable determination
letter. There is no material pending or, to its knowledge, threatened litigation
relating to the ERISA Plans. Neither the Company nor any of its Subsidiaries has
engaged in a transaction with respect to any ERISA Plan that could subject the
Company or any of its Subsidiaries to a tax or penalty imposed by either Section
4975 of the Code or Section 502(i) of ERISA in an amount which would be
material.

               (3)  No liability under Subtitle C or D of Title IV of ERISA has
been or is expected to be incurred by the Company or any of its Subsidiaries
with respect to any ongoing, frozen or terminated "single-employer plan," within
the meaning of Section 4001(a)(15) of ERISA, currently or formerly maintained by
any of them, or the single-employer plan of any entity which is considered one
employer with the Company under Section 4001(a)(15) of ERISA or Section 414 of
the Code (an "ERISA Affiliate"). Neither the Company nor any of its Subsidiaries
presently contributes to a Multiemployer Plan, nor have they contributed to such
a plan within the past five calendar years. No notice of a "reportable event,"
within the meaning of Section 4043 of ERISA for which the 30-day reporting
requirement has not been waived, has been required to be filed for any Pension
Plan or by any ERISA Affiliate within the past 12-month period.

               (4)  All contributions required to be made under the terms of any
ERISA Plan have been timely made. Neither any Pension Plan nor any single-
employer plan of an ERISA Affiliate has an "accumulated funding deficiency"
(whether or not waived) within the meaning of Section 412 of the Code or Section
302 of ERISA. Neither the Company nor any of its Subsidiaries has provided, or
is required to provide, security to any Pension Plan or to any single-employer
plan of an ERISA Affiliate pursuant to Section 401(a)(29) of the Code.

               (5)  Under each Pension Plan which is a single-employer plan, as
of the last day of the most recent plan year, the actuarially determined present
value of all "benefit liability," within the meaning of Section 4001(1)(16) of
ERISA (as determined on the basis of the actuarial assumptions contained in the
plan's most recent actuarial valuation) did not exceed the then current value of
the assets of such plan, and there has been no material change in the financial
condition of such plan since the last day of the most recent plan year.

               (6)  Neither the Company nor any of its subsidiaries has any
obligations for retiree health and life benefits under any plan, except as set
forth in Schedule 4.1(Q)(6). There are no restrictions on the rights of the
Company or any of its Subsidiaries to amend or terminate any such plan without
incurring any liability thereunder.

               (7)  Except as Previously Disclosed in Schedule 4.1(Q)(7) and
except as expressly contemplated by the Employment Agreements, neither the
execution and delivery of this Plan nor the consummation of the transactions
contemplated by this Plan will (a) result in any payment (including severance,
unemployment compensation, golden parachute or otherwise) becoming due to any
director or any employee of the Company or any of its Subsidiaries under any
Compensation and Benefit Plan or otherwise from the Company or any of its
Subsidiaries, (b) increase any benefits otherwise payable under any Compensation
and Benefit Plan, or (c) result in any acceleration of the time of payment or
vesting of any such benefit.

          (R)  NO KNOWLEDGE.  The Company and its Subsidiaries know of no reason
why the regulatory approvals referred to in Section 6.1 should not be obtained,
why Heritage will not be able to account for the Merger as a pooling of
interests, or why the Merger should not qualify as a reorganization under
Section 368(a) of the Code.

                                      14
<PAGE>
 
          (S)  LABOR AGREEMENTS.  Neither the Company nor any of its
Subsidiaries is a party to or is bound by any collective bargaining agreement,
contract or other agreement or understanding with a labor union or labor
organization, nor is the Company or any of its Subsidiaries the subject of a
proceeding asserting that it or any such Subsidiary has committed an unfair
labor practice (within the meaning of the National Labor Relations Act) or
seeking to compel it or such Subsidiary to bargain with any labor organization
as to wages and conditions of employment, nor is there any strike or other labor
dispute involving it or any of its Subsidiaries pending or, to the best of its
knowledge, threatened, nor is it aware of any activity involving its or any of
the Subsidiaries' employees seeking to certify a collective bargaining unit or
engaging in any other organization activity.

          (T)  ASSET CLASSIFICATION.  The Company and its Subsidiaries have
Previously Disclosed in Schedule 4.1(T) a list, accurate and complete in all
material respects, of the aggregate amounts of loans, extensions of credit or
other assets of the Company and its Subsidiaries that have been classified by it
as of June 30, 1998 (the "Asset Classification"); and no amounts of loans,
extensions of credit or other assets that have been classified as of June 30,
1998 by any regulatory examiner as "Other Loans Specially Mentioned,"
"Substandard," "Doubtful," "Loss," or words of similar import are excluded from
the amounts disclosed in the Asset Classification, other than amounts of loans,
extensions of credit or other assets that were charged off by the Company or any
Subsidiary prior to June 30, 1998 and which have been Previously Disclosed to
Heritage.

          (U)  ALLOWANCE FOR POSSIBLE LOAN LOSSES.  The allowance for possible
loan losses shown on the balance sheet in the June 30, 1998 Bank Financial
Reports was, and the allowance for possible loan losses to be shown on
subsequent Holding Company Financial Reports and Bank Financial Reports was and
will be, adequate in the opinion of the Board of Directors of the Company to
provide for possible losses, net of recoveries relating to loans previously
charged off, on loans outstanding (including accrued interest receivable) as of
the date thereof.

          (V)  INSURANCE.  Each of the Company and its Subsidiaries has taken
all requisite action (including the making of claims and the giving of notices)
pursuant to its directors' and officers' liability insurance policy or policies
in order to preserve all rights thereunder with respect to all matters that are
known to the Company, except for such matters that, individually or in the
aggregate, are not reasonably likely to have a Material Adverse Effect on the
Company or its Subsidiaries. Set forth in Schedule 4.1(V) is a list of all
insurance policies maintained by or for the benefit of the Company or its
Subsidiaries or their respective directors, officers, employees or agents.

          (W)  AFFILIATES.  Except as Previously Disclosed in Schedule 4.1(W),
to the best of the Company's knowledge, there is no person who, as of the date
of this Plan, may be deemed to be an "affiliate" of the Company as that term is
used in Rule 145 under the Securities Act.

          (X)  STATE TAKEOVER LAWS, ARTICLES OF INCORPORATION.  The Company and
its Subsidiaries have taken all necessary action to exempt this Plan and the
transactions contemplated by this Plan from, and this Plan and such transactions
are exempt from (1) any applicable state takeover laws, including, but not
limited to, RCW Ch. 23B.19, as amended, and (2) any takeover-related provisions
of the Company's and its Subsidiaries' articles of incorporation.

          (Y)  NO FURTHER ACTION.  The Company and its Subsidiaries have taken
all action so that the entering into of this Plan and the consummation of the
transactions contemplated by this Plan (including the Merger) or any other
action or combination of actions, or any other transaction, contemplated by this
Plan do not and will not (1) require a vote of shareholders (other than as set
forth in Section 6.1), or (2) result in the grant of any rights to any Person
under the articles of incorporation, charter or bylaws of the Company or any of
its Subsidiaries or under any agreement to which the Company or any such
Subsidiaries is a party, or (3) restrict or impair in any way the ability of the
other Parties to exercise the rights granted under this Plan.

          (Z)  ENVIRONMENTAL MATTERS.

               (1)  To the Company's knowledge, it and each of its Subsidiaries,
the Participation Facilities and the Loan/Fiduciary Properties are, and have
been, in compliance with all Environmental laws, except for instances of
noncompliance that are not reasonably likely, individually or in the aggregate,
to have a Material Adverse Effect on the Company or its Subsidiaries.

                                      15
<PAGE>
 
               (2)  There is no proceeding pending or, to the Company's
knowledge, threatened before any court, governmental agency or board or other
forum in which the Company or any of its Subsidiaries or any Participation
Facility has been, or with respect to threatened proceedings, reasonably would
be expected to be, named as a defendant or potentially responsible party (a) for
alleged noncompliance (including by any predecessor) with any Environmental law,
or (b) relating to the release or threatened release into the environment of any
Hazardous Material, whether or not occurring at or on a site owned, leased or
operated by the Company or any of its Subsidiaries or any Participation
Facility, except for such proceedings pending or threatened that are not
reasonably likely, individually or in the aggregate, to have a Material Adverse
Effect on the Company or its Subsidiaries or have been Previously Disclosed in
Schedule 4.1(Z)(2).

               (3)  There is no proceeding pending or, to the Company's
knowledge, threatened before any court, governmental agency or board or other
forum in which any Loan/Fiduciary Property (or the Company or any of its
Subsidiaries in respect of any Loan/Fiduciary Property) has been, or with
respect to threatened proceedings, reasonably would be expected to be, named as
a defendant or potentially responsible party (a) for alleged noncompliance
(including by any predecessor) with any Environmental Law, or (b) relating to
the release or threatened release into the environment of any Hazardous
Material, whether or not occurring at or on a Loan/Fiduciary Property, except
for such proceedings pending or threatened that are not reasonably likely,
individually or in the aggregate, to have a Material Adverse Effect on the
Company or have been Previously Disclosed in Schedule 4.1(Z)(3).

               (4)  To the Company's knowledge, there is no reasonable basis for
any proceeding of a type described in subparagraph (2) or (3) of this paragraph
(Z), except as has been Previously Disclosed in Schedule 4.1(Z)(4).

               (5)  To the Company's knowledge, during the period of (a)
ownership or operation by the Company or any of its Subsidiaries of any of their
respective current properties, (b) participation in the management of any
Participation Facility by the Company or any of its Subsidiaries, or (c) holding
of a security or other interest in a Loan/Fiduciary Property by the Company or
any of its Subsidiaries, there have been no releases of Hazardous Material in,
on, under or affecting any such property, Participation Facility or
Loan/Fiduciary Property, except for such releases that are not reasonably
likely, individually or in the aggregate, to have a Material Adverse Effect on
the Company or its Subsidiaries or have been Previously Disclosed in Schedule
4.1(Z)(5).

               (6)  To the Company's knowledge, prior to the period of (a)
ownership or operation by the Company or any of its Subsidiaries of any of their
respective current properties, (b) participation in the management of any
Participation Facility by the Company or any of its Subsidiaries, or (c) holding
of a security or other interest in a Loan/Fiduciary Property by the Company or
any of its Subsidiaries, there were no releases of Hazardous Material in, on,
under or affecting any such property, Participation Facility or Loan) Fiduciary
Property, except for such releases that are not reasonably likely, individually
or in the aggregate, to have a Material Adverse Effect on the Company or its
Subsidiaries or have been Previously Disclosed in Schedule 4.1(Z)(6).

         (AA)  TAX REPORTS.  Except as Previously Disclosed in Schedule 4.1(AA),
(1) all reports and returns with respect to Taxes that are required to be filed
by or with respect to the Company or its Subsidiaries, including consolidated
federal income tax returns of the Company and its Subsidiaries (collectively,
the "Tax Returns"), have been duly filed or requests for extensions have been
timely filed and have not expired, for periods ended on or prior to the most
recent fiscal year-end, except to the extent all such-failures to file, taken
together, are not reasonably likely to have a Material Adverse Effect on the
Company or its Subsidiaries, and such Tax Returns were true, complete and
accurate in all material respects, (2) all Taxes shown to be due on the Tax
Returns have been paid in full, (3) the Tax Returns have been examined by the
Internal Revenue Service or the appropriate state, local or foreign taxing
authority, or the period for assessment of the Taxes in respect of which such
Tax Returns were required to be filed has expired, (4) all Taxes due with
respect to completed and settled examinations have been paid in full, (5) no
issues have been raised by the relevant taxing authority in connection with the
examination of any of the Tax Returns which are reasonably likely, individually
or in the aggregate, to result in a determination that would have a Material
Adverse Effect on the Company or its Subsidiaries, except as reserved against in
the Holding Company Financial Reports of the Company, and (6) no waivers of
statutes of limitations (excluding such statutes that relate to years under
examination by the Internal Revenue Service) have been given by or requested
with respect to any Taxes of the Company or its Subsidiaries.

                                      16
<PAGE>
 
         (BB)  ACCURACY OF INFORMATION.  The statements with respect to the
Company and its Subsidiaries contained in this Plan, the Schedules and any other
written documents executed and delivered by or on behalf of the Company or any
other Party pursuant to the terms of or relating to this Plan are true and
correct in all material respects, and such statements and documents do not omit
any material fact necessary to make the statements contained therein, in light
of the circumstances under which they were made, not misleading.

         (CC)  DERIVATIVES CONTRACTS.  None of the Company or its Subsidiaries
is a party to or has agreed to enter into a Derivatives Contract or owns
securities that are referred to as "structured notes" except for those
Derivatives Contracts and structured notes Previously Disclosed in Schedule
4.1(CC). Schedule 4.1(CC) includes a list of any assets of the Company or its
Subsidiaries that are pledged as security for each such Derivatives Contract.

         (DD)  ACCOUNTING CONTROLS.  Each of the Company and its subsidiaries
has devised and maintained systems of internal controls sufficient to provide
reasonable assurances that (1) all material transactions are executed in
accordance with management's general or specific authorization, (2) all material
transactions are recorded as necessary to permit the preparation of financial
statements in conformity with GAAP, and to maintain proper accountability for
items, (3) access to the material property and assets of the Company and its
Subsidiaries is permitted only in accordance with management's general or
specific authorization, and (4) the recorded accountability for items is
compared with the actual levels at reasonable intervals and appropriate action
is taken with respect to any differences.

         (EE)  COMMITMENTS AND CONTRACTS.  Neither the Company nor any of its
Subsidiaries is a party or subject to any of the following (whether written or
oral, express or implied):

               (1)  except as Previously Disclosed in Schedule 4.1(EE)(1) and
except for the Employment Agreements, any employment contract or understanding
(including any understandings or obligations with respect to severance or
termination pay liabilities or fringe benefits) with any present or former
officer, director or employee (other than those which are terminable at will by
the Company or any such Subsidiary without any obligation on the part of the
Company or any such Subsidiary to make any payment in connection with such
termination);

               (2)  except as Previously Disclosed in Schedule 4.1(EE)(2), any
real or personal property lease with annual rental payments aggregating $10,000
or more; or

               (3)  except as Previously Disclosed in Schedule 4.1(EE)(3), any
material contract with any affiliate.

         (FF)  YEAR 2000 COMPLIANCE.  The Company has adopted and is
implementing a program to address identified problems associated with the
capacity and capability of the computer software, hardware, code and programs
utilized by the Company, its Subsidiaries and their vendors to properly process
transactions after December 31, 1999.

     4.2  HERITAGE REPRESENTATIONS AND WARRANTIES.  Heritage hereby represents
and warrants to the Company and the Bank as follows:

          (A)  RECITALS.  The facts set forth in the Recitals of the Plan with
respect to Heritage are true and correct.

          (B)  ORGANIZATION, STANDING AND AUTHORITY.  Heritage is duly qualified
to do business and is in good standing in the States of the United States and
foreign jurisdictions where the failure to be duly qualified, individually or in
the aggregate, is reasonably likely to have a Material Adverse Effect on it.
Each of Heritage and its Subsidiaries has in effect all federal state, local,
and foreign governmental authorizations necessary for it to own or lease its
properties and assets and to carry on its business as it is now conducted, the
absence of which, individually or in the aggregate, is reasonably likely to have
a Material Adverse Effect on Heritage.

          (C)  SHARES.  The outstanding shares of the Heritage's capital stock
are validly issued and outstanding, fully paid and nonassessable, and subject to
no preemptive rights. Except as Previously Disclosed in

                                      17
<PAGE>
 
Schedule 4.2(C), there are no shares of capital stock or other equity securities
of it or its Subsidiaries outstanding and no outstanding Rights with respect
thereto.

          (D)  CORPORATE POWER.  Heritage has the corporate power and authority
to carry on its business as it is now being conducted and to own all its
material properties and assets.

          (E)  CORPORATE AUTHORITY.  This Plan and each of the Employment
Agreements have been authorized by all necessary corporate action of Heritage,
and each such agreement is a valid and binding agreement of Heritage,
enforceable against Heritage in accordance with its terms, subject to
bankruptcy, insolvency and other laws of general applicability relating to or
affecting creditors' rights and to general equity principles.

          (F)  NO DEFAULTS.  Subject to the receipt of approval by its
shareholders and the receipt of the required regulatory approvals referred to in
Section 6.1, and the required filings under federal and state securities laws,
and except as Previously Disclosed in Schedule 4.2(F), the execution, delivery
and performance of this Plan and each of the Employment Agreements and the
consummation by Heritage and each of its Subsidiaries that is a Party of the
transactions contemplated by this Plan do not and will not (1) constitute a
breach or violation of, or a default under, any law, rule or regulation or any
judgment, decree, order, governmental permit or license, or agreement, indenture
or instrument of Heritage or of any of its Subsidiaries or to which Heritage or
any of its Subsidiaries or its or their properties is subject or bound, which
breach, violation or default is reasonably likely, individually or in the
aggregate, to have a Material Adverse Effect on Heritage, (2) constitute a
breach or violation of, or a default under, the articles of incorporation,
charter or bylaws of it or any of its Subsidiaries, or (3) require any consent
or approval under any such law, rule, regulation, judgment, decree, order,
governmental permit or license or the consent or approval of any other party to
any such agreement, indenture or instrument, other than any such consent or
approval that, if not obtained, would not be reasonably likely, individually or
in the aggregate, to have a Material Adverse Effect on Heritage.

          (G)  FINANCIAL REPORTS.  Except as Previously Disclosed in Schedule
4.2(G), in the case of Heritage, its Registration Statement on form S-1 (as
amended) and its Quarterly Report on Form 10Q for the fiscal quarter ended March
31, 1998, and all other documents filed or to be filed subsequent to March 31,
1998 under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, in the form
filed with the SEC (in each such case, the "Heritage Financial Reports"), did
not and will not contain any untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements made therein, in light of the circumstances under which they were
made, not misleading; and each of the balance sheets in or incorporated by
reference into the Heritage Financial Reports (including the related notes and
schedules thereto) fairly presents and will fairly present the financial
position of the entity or entities to which it relates as of its date, and each
of the statement of income and changes in shareholders' equity and cash flows or
equivalent statements in the Heritage Financial Reports (including any related
notes and schedules thereto) fairly presents and will fairly present the results
of operations, changes in shareholders, equity and changes in cash flows, as the
ca se may be, of the entity or entities to which it relates for the periods set
forth therein, in each case in accordance with GAAP, except as may be noted
therein, subject to normal and recurring year-end audit adjustments in the case
of unaudited statements.

          (H)  NO EVENTS.  Except as Previously Disclosed on Schedule 4.2(H),
since December 31, 1997, no event has occurred which is reasonably likely to
have a Material Adverse Effect on it.

          (I)  LITIGATION; REGULATORY ACTION.  Except as Previously disclosed in
Schedule 4.2(I) no litigation, proceeding or controversy before any court or
governmental agency is pending that, individually or in the aggregate, is
reasonably likely to have a Material Adverse Effect on Heritage or its
Subsidiaries or that alleges claims under any fair lending law or other law
relating to discrimination, including the Equal Credit Opportunity Act, the Fair
Housing Act, the Community Reinvestment Act and the Home Mortgage Disclosure
Act, and, to the best of its knowledge, no such litigation, proceeding or
controversy has been threatened; and except as Previously Disclosed in Schedule
4.2(I), neither Heritage nor any of its Subsidiaries or any of its or their
material properties or their officers, directors or controlling persons is a
party to or is subject to any order, decree, agreement, memorandum of
understanding or similar arrangement with, or a commitment letter or similar
submission to, any Regulatory Authority, and neither Heritage nor any of its
Subsidiaries has been advised by any of such Regulatory Authorities that such
authority is contemplating issuing or requesting (or is considering the
appropriateness of issuing or requesting) any such order, decree, agreement,
memorandum of understanding, commitment letter or similar submission.

                                      18
<PAGE>
 
          (J)  REPORTS.  Since September 30, 1995, each of Heritage or its
Subsidiaries has filed all reports and statements, together with any amendments
required to be made with respect thereto, that is required to file with (1) the
FDIC, (2) the Department, (3) the Federal Reserve Board, and (4) any other
Regulatory Authorities having jurisdiction with respect to Heritage and its
Subsidiaries.  As of their respective dates (and without giving effect to any
amendments or modifications filed after the date of this Plan with respect to
reports and documents filed before the date of this Plan), each of such reports
and documents, including the financial statements, exhibits and schedules
thereto, complied in all material respects with all of the statutes, rules and
regulations enforced or promulgated by the Regulatory Authority with which they
were filed land did not contain any untrue statement of a material fact or omit
to state any material fact necessary in order to make the statements made
therein, in light of the circumstances under which they were made, not
misleading.

          (K)  ACCURACY OF INFORMATION.  The statements with respect to Heritage
and its Subsidiaries contained in this Plan, the Schedules and any other written
documents executed and delivered by or on behalf of Heritage or any other Party
pursuant to the terms of this Plan are true and correct in all material
respects, and such statements and documents do not omit any material fact
necessary to make the statements contained therein, in light of the
circumstances under which they were made, not misleading.

          (L)  DERIVATIVES CONTRACTS.  None of Heritage or its Subsidiaries is a
party to or has agreed to enter into a Derivatives Contract or owns securities
that are referred to as "structured notes" except for those Derivatives
Contracts and structured notes Previously Disclosed in Schedule 4.2(L). Schedule
4.2(L) includes a list of any assets of Heritage or its Subsidiaries that are
pledged as security for each such Derivatives Contract.

          (M)  ABSENCE OF UNDISCLOSED LIABILITIES.  Neither Heritage nor any of
its Subsidiaries has any obligation or liability (contingent or otherwise) that,
individually or in the aggregate, is reasonably likely to have a Material
Adverse Effect on it, except (1) as reflected the Heritage Financial Reports
prior to the date of this Plan, and (2) for commitments and obligations made, or
liabilities incurred, in the ordinary course of business consistent with past
practice since December 31, 1997. Since December 31, 1997, neither Heritage nor
any of its Subsidiaries has incurred or paid any obligation or liability
(including any obligation or liability incurred in connection with any
acquisitions in which any form of direct financial assistance of the federal
government or any agency thereof has been provided to any Subsidiary) that,
individually or in the aggregate, is reasonably likely to have a Material
Adverse Effect on it.

          (N)  YEAR 2000 COMPLIANCE.  Heritage has adopted and is implementing a
program to address identified problems associated with the capacity and
capability of the computer software, hardware, code and programs utilized by
Heritage, its Subsidiaries and their vendors to properly process transactions
after December 31, 1999.

                             ARTICLE V. COVENANTS

     Each of the Company and the Bank hereby covenants to Heritage, and Heritage
hereby covenants to the Company and the Bank, that:

     5.1  BEST EFFORTS.  Subject to the terms and conditions of this Plan and,
in the case of the Company and the Bank, to the exercise by their respective
Boards of Directors of such Boards' fiduciary duties, each party shall use its
best efforts in good faith to take, or cause to be taken, all actions, and to
do, or cause to be done, all things necessary, proper or desirable, or advisable
under applicable laws, so as to permit consummation of the Merger by January 31,
1999, and to otherwise enable consummation of the transactions contemplated by
this Plan, and shall cooperate fully with the other Parties to that end.

     5.2  THE PROXY.  In the case of the Company:  it shall promptly assist
Heritage in the preparation of a joint proxy statement (the "Proxy Statement")
to be mailed to the holders of the Company Common Stock and the holders of
Heritage Common Stock in connection with the transactions contemplated by this
Plan and to be filed by Heritage in a registration statement (the "Registration
Statement") with the SEC as provided in Section 5.8, which shall conform to all
applicable legal requirements.  Heritage and Company shall call special meetings
(the "Meetings") of the holders, respectively, of Company Common Stock and
Heritage Common Stock to be held as soon as practicable for purposes of voting
upon the transactions contemplated by this Plan and Heritage and

                                      19
<PAGE>
 
Company shall use their best efforts to solicit and obtain shareholder votes in
favor of the transactions contemplated by this Plan and, subject to the exercise
of their fiduciary duties, the Boards of Directors of the Company and Heritage
shall recommend approval of such transactions by such respective holders.

     5.3  REGISTRATION STATEMENT, COMPLIANCE WITH SECURITIES LAWS.  When the
Registration Statement or any post-effective amendment or supplement thereto
shall become effective, and at all times subsequent to such effectiveness, up to
and including the date of the Meetings, such Registration Statement, and all
amendments or supplements thereto, with respect to all information set forth
therein furnished or to be furnished by or on behalf of the Company relating to
the Company or its Subsidiaries and by or on behalf of Heritage relating to
Heritage or its subsidiaries, (A) will comply in all material respects with the
provisions of the Securities Act and any other applicable statutory or
regulatory requirements, and (B) will not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements contained therein not misleading; provided,
however, in no event shall any Party be liable for any untrue statement of a
material fact or omission to state a material fact in the registration Statement
made in reliance upon, and in conformity with, written information concerning
another Party furnished by or on behalf of such other party specifically for use
in the Registration Statement.

     5.4  REGISTRATION STATEMENT EFFECTIVENESS.  In the case of Heritage: it
will advise the Company, promptly after Heritage receives notice thereof, of the
time when the Registration Statement has become effective or any supplement or
amendment has been filed, of the issuance of any stop order or the suspension of
the qualification of the Heritage Common Stock for offering or sale in any
jurisdiction, of the initiation or threat of any proceeding for any such
purpose, or of any request by the SEC for the amendment or supplement of the
Registration Statement or for additional information.

     5.5  PRESS RELEASES.  The Company and the Bank will not, without the prior
approval of Heritage, and Heritage will not (and will cause its Subsidiaries not
to), without the prior approval of the Company, issue any press release or
written statement for general circulation relating to the transactions
contemplated by this Plan, except as otherwise required by law.

     5.6  ACCESS; INFORMATION.

          (A)  Upon reasonable notice, the Company and the Bank shall afford
Heritage and Heritage shall afford the Company and Heritage's and the Company's
respective officers, employees, counsel, accountants and other authorized
representatives, access, during normal business hours throughout the period up
to the Effective Date, to all of their respective properties, books, contracts,
commitments and records. During such period, the Company and the Bank shall
furnish promptly to Heritage and Heritage shall furnish promptly to the Company
(and cause their respective accountants and other agents to furnish promptly)
(1) a copy of each material report, schedule and other document filed by the
Company and its Subsidiaries or Heritage and its Subsidiaries with any
Regulatory Authority, and (2) all other information concerning the business,
properties and personnel as Company or Heritage, respectively, may reasonably
request, provided that no investigation pursuant to this Section 5.6 shall
affect or be deemed to modify or waive any representation or warranty made by
the Company or the Bank or Heritage in this Plan or the conditions to the
obligations of the Company and the Bank or Heritage to consummate the
transactions contemplated by this Plan; and

          (B)  The Company and Heritage will not use any information obtained
pursuant to this Section 5.6 for any purpose unrelated to the consummation of
the transactions contemplated by this Plan and, if this Plan is terminated, will
hold all confidential information and documents obtained pursuant to this
paragraph in confidence (as provided in Section 8.6) unless and until such time
as such information or documents become publicly available other than by reason
of any action or failure to act by Company or Heritage or as it is advised by
counsel that any such information or document is required by law or applicable
stock exchange rule to be disclosed, and in the event of the termination of this
Plan, Company and Heritage will, upon request by the other, deliver to the other
all documents so obtained by it or destroy such documents and, in the case of
destruction, will certify such fact to the other.

                                      20
<PAGE>
 
     5.7  TERMINATION FEE.

          (A)  Without the prior written consent of Heritage, the Company shall
not, and it shall cause its Subsidiaries not to, solicit, initiate or encourage
inquiries or proposals with respect to, or, except to the extent that the Board
of Directors of the Company determines in its good faith judgment after receipt
of advice in writing of counsel that such response is reasonably required in
order to discharge its fiduciary duties, furnish any nonpublic information
relating to or participate in any negotiations or discussions concerning, any
acquisition or purchase of all or a substantial portion of the assets of, or a
substantial equity interest in, the Company or any of its Subsidiaries or any
merger or other business combination with the Company or any of its Subsidiaries
other than as contemplated by this Plan("Acquisition Proposal"); it shall
instruct its and its Subsidiaries' officers, directors, agents, advisors and
affiliates to refrain from doing any of the foregoing; and it shall notify
Heritage immediately if any such inquiries or proposals are received by, or any
such negotiations or discussions are sought to be initiated with, the Company or
any of its Subsidiaries.

          (B)  If (1) an Acquisition Proposal occurs prior to the Meetings, (2)
the approval of the Company's shareholders contemplated by Section 6.1 is not
obtained at the special meeting of Company's shareholders, and (3) prior to
October 31, 1999, a Third Party acquires control of the Company or the Bank by
merger, purchase of assets, acquisition of stock or otherwise, then unless the
representations and warranties of Heritage in this Plan were false in any
material respect as of the date of Company's special meeting of shareholders or
Heritage was in material default of its covenants in this Plan as of such date,
the Company will promptly pay to Heritage the amount of $400,000.  For the
purposes of this subsection (B), a Third Party will be deemed to have acquired
control of the Company or the Bank when the Third Party possesses, directly or
indirectly, the power to direct or cause the direction of the management and
policies of the Company or the Bank, whether through the ownership of voting
interests, by contract, or otherwise.

     5.8  REGISTRATION STATEMENT PREPARATION; REGULATORY APPLICATIONS
PREPARATION.  In the case of Heritage: Heritage shall, as promptly as
practicable following the date of this Plan, prepare and file the Registration
Statement with the SEC with respect to the shares of Heritage Common Stock to be
issued to the holders of Company Common Stock and Company Options pursuant to
this Plan, and Heritage shall use its best efforts to cause the Registration
Statement to be declared effective as soon as practicable after the filing
thereof. Heritage shall, as promptly as practicable following the date of this
Plan, prepare and file all necessary notices or applications with Regulatory
Authorities having jurisdiction with respect to the transactions contemplated by
this Plan.

     5.9  BLUE-SKY FILINGS.  In the case of Heritage: Heritage shall use its
best efforts to obtain, prior to the effective date of the Registration
Statement, any necessary state securities laws or "blue sky" permits and
approvals, provided that Heritage shall not be required by virtue thereof to
submit to general jurisdiction in any state.

     5.10  AFFILIATE AGREEMENTS.  Company and the Bank will use their best
efforts to induce each person who may be deemed to be an "affiliate" of,
respectively, Company or the Bank for purposes of Rule 145 under the Securities
Act, to execute and deliver to Heritage on or before the mailing of the joint
Proxy Statement for the Meetings, an agreement in the form attached hereto as
Exhibit D for "affiliates" of the Company, restricting the disposition of such
affiliate's shares of Company Common Stock and the shares of Heritage Common
Stock to be received by such person in exchange for such person's shares of
Company Common Stock or Company Options.  Heritage agrees to use its best
efforts to maintain the availability of Rule 145 for use by such "affiliates".

     5.11  CERTAIN POLICIES OF THE COMPANY AND THE BANK.  In the case of each of
the Company and the Bank:  Each shall, at Heritage's request, modify and change
its loan, litigation and other reserve and real estate valuation policies and
practices (including loan classifications and levels of reserves), and generally
conform its operating, lending and compliance policies and procedures,
immediately prior to the Effective Date so as to be consistent on a basis
satisfactory to Heritage; provided, however, that prior to any such modification
or change, Heritage shall certify that the conditions to the obligation of
Heritage under Section 6.1 and 6.2 to consummate the transactions contemplated
by this Plan, other than the condition set forth in Section 6.1(G), have been
satisfied or waived.  The Company's and the Bank's representations, warranties,
covenants and conditions contained in this Plan shall not be deemed to be
untrue, breached or unsatisfied in any respect for any purpose as a consequence
of any modifications or changes undertaken pursuant to this Section 5.11.

                                      21
<PAGE>
 
     5.12  STATE TAKEOVER LAW.  In the case of the Company: The Company shall
not take any action that would cause the transactions contemplated by this Plan
to be subject to any applicable state takeover statute, and the Company shall
take all necessary steps to exempt (or ensure the continued exemption of) the
transactions contemplated by this Plan from, or, if necessary, challenge the
validity or applicability of, any applicable state takeover law.

     5.13  NO RIGHTS TRIGGERED.  In the case of the Company: Except for those
consents of Third Parties Previously Disclosed on Schedule 4.1(G), the Company
shall take all necessary steps to ensure that the entering into of this Plan and
the consummation of the transactions contemplated by this Plan (including the
Merger) and any other action or combination of actions, or any other
transactions contemplated by this Plan, do not and will not (A) result in the
grant of any rights to any Person under the articles of incorporation or bylaws
of the Company or under any agreement to which the Company or any of its
Subsidiaries is a party, or (B) restrict or impair in any way the ability of
Heritage to exercise the rights granted under this Plan.

     5.14  SHARES LISTED.  In the case of Heritage: Heritage shall use its best
efforts to cause to be listed, prior to the Effective Date, on the NASDAQ
National Market upon official notice of issuance the shares of  Heritage Common
Stock to be issued to the holders of Company Common Stock and Company Options.

     5.15  REGULATORY APPLICATIONS. Heritage shall, and shall cause its
Subsidiaries to (A) promptly prepare and submit applications to the appropriate
Regulatory Authorities for approval of the Merger, and (B) promptly make all
other appropriate filings to secure all other approvals, consents and rulings
that are necessary for the consummation of the Merger by Heritage.

     5.16  REGULATORY DIVESTITURES.  In the case of the Company:  No later than
the Effective Date, the Company shall cease engaging in such activities as
Heritage shall advise the Company in writing are not permitted to be engaged in
by Heritage under applicable law following the Effective Date and, to the extent
required by any Regulatory Authority as a condition of approval of the
transactions contemplated by this Plan, the Company shall divest any Subsidiary
engaged in activities or holding assets that are impermissible for Heritage or
its Subsidiaries, on terms and conditions agreed to by Heritage; provided,
however, that prior to taking such action, Heritage shall certify that the
conditions to the obligations of Heritage under Sections 6.1 and 6.2 to
consummate the transactions contemplated by this Plan, other than the conditions
set forth in Section 6.1(G), have been satisfied or waived.

     5.17  CURRENT INFORMATION.

           (A)  During the period from the date of this Plan to the Effective
Date, each of the Company and Heritage shall, and shall cause its
representatives to, confer on a regular and frequent basis with representatives
of the other.

           (B)  Each of the Company and Heritage shall promptly notify the other
of (1) any material change in the business or operations of it or its
Subsidiaries, (2) any material complaints, investigations or hearings (or
communications indicating that the same may be contemplated) of any Regulatory
Authority relating to it or its Subsidiaries, (3) the initiation or threat of
material litigation involving or relating to it or its Subsidiaries, or (4) any
event or condition that might reasonably be expected to cause any of its
representations or warranties set forth in this Plan not to be true and correct
in all material respects as of the Effective Date or prevent it or its
Subsidiaries from fulfilling its or their obligations under this Plan.

     5.18  INDEMNIFICATION.

           (A)  From and after the Effective Date, Heritage shall indemnify,
defend and hold harmless the present and former directors, officers and
employees of the Company and its Subsidiaries (each, an "Indemnified Party")
against all costs or expenses (including reasonable attorneys' fees), judgments,
fines, losses, claims, damages or liabilities incurred in connection with any
claim, action, suite, proceeding or investigation, whether civil, criminal,
administrative or investigative, and arising out of matters existing or
occurring at or prior to the Effective Date (including the transactions
contemplated by this Plan), whether asserted or claimed prior to, at or after
the

                                      22
<PAGE>
 
Effective Date, to the fullest extent that the Company would have been
permitted under Washington law and its articles of incorporation or bylaws in
effect on the date of this Plan to indemnify such person (and Heritage will also
advance expenses as incurred to the fullest extent permitted under applicable
law so long as the person to whom expenses are advanced provides an undertaking
to repay such advances within a reasonable period of time if it is ultimately
determined that applicable law does not allow for such indemnification).

           (B)  Any Indemnified Party wishing to claim indemnification under
paragraph (A) of this Section 5.18, upon learning of such claim, action, suit,
proceeding or investigation, shall promptly notify Heritage thereof, provided,
however, that the failure so to notify shall not affect the obligations of
Heritage under paragraph (A) of this Section 5.18 (unless such failure
materially and adversely increases Heritage's liability under such paragraph
(A)). In the event of any such claim, action, suit, proceeding or investigation
(whether arising before or after the Effective Date ), (1) Heritage shall have
the right to assume the defense thereof and Heritage shall pay all reasonable
fees and expenses of such counsel for the Indemnified parties promptly as
statements therefor are received; provided, however, that Heritage shall be
obligated pursuant to this paragraph (B) to pay for only one firm of counsel for
all Indemnified Parties in any jurisdiction for any single action, suit or
proceeding, (2) the Indemnified Parties will cooperate in the defense of any
such matter, and (3) Heritage shall not be liable for any settlement effected
without its prior written consent.

           (C)  If Heritage or any of its successors or assigns shall
consolidate with or merge into any other entity and shall not be the continuing
or surviving entity of such consolidation or merger or shall transfer all or
substantially all of its assets to any entity, then and in each case, proper
provision shall be made so that the successors and assigns of Heritage shall
assume the obligations set forth in this Section 5.18.

           (D)  Heritage shall pay all expenses, including attorneys' fees, that
may be incurred by any Indemnified party in enforcing the indemnity and other
obligations provided for in this Section 5.18. The rights of each Indemnified
Party under this Section 5.18 shall be in addition to any other rights such
Indemnified party may have under the articles of incorporation or bylaws of the
Company or under applicable Washington law.

           (E)  Effective as of the Effective Date, Heritage shall cause all the
directors of the Bank to become covered under the directors' and officers'
liability insurance policy maintained by Heritage for its own directors and
officers which includes coverage for prior acts.

     5.19  APPOINTMENT OF DIRECTORS.  Immediately after the Effective Date,
Heritage will cause its board to be expanded by one position and cause the
appointment of an outside (non-management) director of the Company who resides
in eastern Washington as recommended by the Company to the Board of Directors of
Heritage to hold office until such time as his or her successor is elected and
qualified.

     5.20  OPERATION OF THE BANK.  The Bank shall operate as a separately
chartered subsidiary of Heritage until at least December 31, 2003 unless the
boards of Heritage and/or the Bank in the exercise of their fiduciary duties
determine to combine the Bank with a subsidiary of Heritage prior to or
following such date.

     5.21  BENEFIT PLANS.  Upon consummation of the Merger, all employees of the
Company and its Subsidiaries shall be deemed to be at-will employees of Heritage
and its Subsidiaries except for those employees who are parties to the
Employment Agreements (all such employees being "Continuing Employees").  From
and after the Effective Date, employees of the Company and its Subsidiaries
shall be entitled to participate in the pension, employee benefit and similar
plans (including employee stock ownership, stock option, bonus or other
incentive plans) on substantially the same terms and conditions as similarly
situated employees of Heritage and its Subsidiaries.  For the purpose of
determining eligibility to participate in such plans and the vesting and related
calculations of benefits under such plans (but not for the accrual of benefits),
Heritage shall give effect to years of service with the Company or the Company's
Subsidiaries, as the case may be, as if such service were with Heritage or its
Subsidiaries.

             ARTICLE VI. CONDITIONS TO CONSUMMATION OF THE MERGER
                                        
     6.1  CONDITIONS TO EACH PARTY'S OBLIGATIONS.  The respective obligations of
each party to consummate the transactions contemplated by this Plan are subject
to the written waiver by such Party or the fulfillment on or prior to the
Effective Date of each of the following conditions:

                                      23
<PAGE>
 
          (A)  SHAREHOLDER VOTES.  This Plan shall have been duly approved by
the requisite votes of the Company Shareholders and Heritage's shareholders
under applicable law and the articles of incorporation and bylaws, respectively,
of the Company and Heritage.

          (B)  REGULATORY APPROVALS.  The Parties shall have procured all
necessary regulatory consents and approvals by the appropriate Regulatory
Authorities, and any waiting periods relating thereto shall have expired;
provided, however, that no such approval or consent shall have imposed any
condition or requirement not normally imposed in such transactions that, in the
opinion of Heritage, would deprive Heritage of the material economic or business
benefits of the transactions contemplated by this Plan .

          (C)  NO INJUNCTION.  There shall not be in effect any order, decree or
injunction of any court or agency of competent jurisdiction that enjoins or
prohibits consummation of any of the transactions contemplated by this Plan.

          (D)  EFFECTIVE REGISTRATION STATEMENT.  The Registration Statement
shall have become effective 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 or any other
Regulatory Authority.

          (E)  BLUE-SKY PERMITS.  Heritage shall have received all state
securities laws and "blue sky" permits necessary to consummate the Merger.

          (F)  TAX OPINIONS.  Heritage shall have received an opinion from
Gerrish & McCreary, P.C. and the Company shall have received an opinion from
Gordon, Thomas, Honeywell, Malanca, Peterson & Daheim, P.L.L.C. to the effect
that (1) the Merger constitutes a reorganization under Section 368 of the Code,
and (2) no gain or loss will be recognized by shareholders of the Company who
receive shares of Heritage Common Stock in exchange for their shares of the
Company Common Stock, except that gain or loss may be recognized as to cash
received in the Merger, and, in rendering their opinions, Gerrish & McCreary,
P.C. and Gordon, Thomas, Honeywell, Malanca, Peterson & Daheim, P.L.L.C. may
require and rely upon representations contained in certificates of officers of
Heritage, the Company and others. The Parties acknowledge that the Merger
Consideration received by Company Optionholders in exchange for their Company
Options will be a taxable event for each Company Optionholder.

          (G)  NASDAQ LISTING.  The shares of Heritage Common Stock to be issued
pursuant to this Plan shall have been approved for listing on the NASDAQ
National Market subject only to official notice of issuance.

          (H)  FAIRNESS OPINIONS.  The Company shall have received, immediately
prior to the mailing of the Proxy Statement to the Company Shareholders, an
opinion of Columbia Financial Advisors to the effect that the financial terms of
the Merger are fair from a financial point of view to the Company Shareholders.
Heritage shall have received, immediately prior to the mailing of the Proxy
Statement to Heritage's shareholders, an opinion of Ryan, Beck & Co. to the
effect that the financial terms of the Merger are fair from a financial point of
view to Heritage's shareholders.

          (I)  EMPLOYMENT CONTRACTS.  The Employment Agreements attached as
Exhibits D, E, F and G shall have been duly executed and delivered by all
parties to such Employment Agreements.

     6.2  CONDITIONS TO OBLIGATIONS OF HERITAGE.  The obligations of Heritage to
consummate the transactions contemplated by this Plan also are subject to the
written waiver by Heritage or the fulfillment on or prior to the Effective Date
of each of the following conditions:

          (A)  LEGAL OPINION.  Heritage shall have received an opinion, dated
the Effective Date, of Gordon, Thomas, Honeywell, Malanca, Peterson, Daheim,
P.L.L.C., counsel for the Company and the Bank, in the form of Exhibit H.

                                      24
<PAGE>
 
          (B)  POOLING OPINION.  Heritage shall have received the opinion of
KPMG Peat Marwick LLP, Heritage's independent auditors, dated as of the
Effective Date, to the effect that the Merger will be accounted for as a pooling
of interests under applicable accounting principles.

          (C)  OFFICERS' CERTIFICATE.  (1) Each of the representations and
warranties contained in this Plan of the Company and the Bank shall be true and
correct in all material respects (except the representations and warranties in
Section 4.1(C) and those representations and warranties that are qualified by
reference to "Material Adverse Effect" or any other materiality caveat, which
shall be true and correct in all respects) as of the date of this Plan and upon
the Effective Date with the same effect as though all such representations and
warranties had been made on the Effective Date, except for any such
representations and warranties that specifically relate to an earlier date,
which shall be true and correct as of such earlier date and except as otherwise
provided in Section 5.11, and (2) each and all of the agreements and covenants
of the Company and the Bank to be performed and complied with pursuant to this
Plan on or prior to the Effective Date shall have been duly performed and
complied with in all material respects, and Heritage shall have received a
certificate signed by the chief executive officers, chief financial officers,
and chief lending officers of the Company and the Bank dated the Effective Date,
to such effect.

          (D)  RECEIPT OF AFFILIATE AGREEMENTS.  Heritage shall have received
from each affiliate of the Company the agreement referred to in Section 5.10.

          (E)  ADVERSE CHANGE.  During the period from December 31, 1997 to the
Effective Date, there shall not have been any material adverse change in the
financial position or results of operations of the Company or the Bank, nor
shall the Company or the Bank have sustained any loss or damage to its
properties, whether or not insured, that materially affects its ability to
conduct its business; and Heritage shall have received a certificate dated the
Effective Date signed by the Chief Executive Officers of the Company and the
Bank to such effect.

          (F)  DISSENTERS' RIGHTS.  The number of shares of Company Common Stock
for which cash is to be paid because dissenters' rights of appraisal under the
Appraisal Laws shall have been effectively preserved as of the Effective Date or
because of payment of cash in lieu of fractional shares of Heritage Common Stock
shall not exceed in the aggregate 5% of the outstanding shares of Company Common
Stock.

          (G)  CAPITAL.  The Company's Capital shall not be less than $4.750
million on the Effective Date.

          (H)  ALLOWANCE FOR LOAN AND LEASE LOSSES.  As of the Effective Date,
the Bank's allowance for possible loan and lease losses shall not be less than
1% of the Bank's total outstanding loans and leases and in all cases will be
adequate to absorb the Bank's anticipated loan and lease losses.

          (I)  DIRECTOR'S AGREEMENTS.  Heritage shall have received from each
director of Company and the Bank (other than D. Michael Broadhead, who will be a
party to a separate employment agreement) the Director's Agreement attached as
Exhibit B.

     6.3  CONDITIONS TO OBLIGATIONS OF COMPANY AND THE BANK.  The obligations of
the Company and the Bank to consummate the transactions contemplated by this
Plan also are subject to the written waiver by the Company and the Bank or the
fulfillment on or prior to the Effective Date of each of the following
conditions:

          (A)  LEGAL OPINION.  The Company and the Bank shall have received an
opinion, dated the Effective Date, of Gerrish & McCreary, P.C., special counsel
for Heritage, in the form of Exhibit I.

          (B)  OFFICER'S CERTIFICATE.  (1) Each of the representations and
warranties of Heritage contained in this Plan shall be true and correct in all
material respects (except the representations and warranties in Section 4.2(C)
and those representations and warranties that are qualified by reference to
"Material Adverse Effect" or any other materiality caveat, which shall be true
and correct in all respects) as of the date of this Plan and upon the Effective
Date with the same effect as though all such representations and warranties had
been made on the Effective Date, except for any such representations and
warranties that specifically relate to an earlier date, which shall be true and
correct as of such earlier date, and (2) each and all of the agreements and
covenants of Heritage to

                                      25
<PAGE>
 
be performed and complied with pursuant to this Plan on or prior to the
Effective Date shall have been duly performed and complied with in all material
respects, and the Company and the Bank shall have received a certificate signed
by an executive officer of Heritage dated the Effective Date, to such effect.

          (C)  ADVERSE CHANGE.  During the period from December 31, 1997 to the
Effective Date, there shall not have been any material adverse change in the
financial position or results of operations of Heritage, nor shall Heritage have
sustained any loss or damage to its properties, whether or not insured, that
materially affects its ability to conduct its business; and the Company shall
have received a certificate dated the Effective Date signed by the Chief
Executive Officer of Heritage to such effect.

                           ARTICLE VII. TERMINATION
                                        
     7.1  GROUNDS FOR TERMINATION.  This plan may be terminated prior to the
Effective Date, either before or after receipt of required shareholder
approvals:

          (A) MUTUAL CONSENT.  By the mutual consent of Heritage and the
Company, if the Board of Directors of each so determines by vote of a majority
of the members of its entire board.

          (B)  BREACH.  By Heritage or the Company, if its Board of Directors so
determines by vote of a majority of the members of its entire Board, in the
event of (A) a material breach by the other party of any representation or
warranty contained in this Agreement, which breach cannot or has not been cured
within 30 days after the giving of written notice to the breaching party of such
breach, or (B) a material breach by the other party of any of the covenants or
agreements contained in this Agreement, which breach cannot be or has not been
cured within 30 days after the giving of written notice to the breaching party
of such breach.

          (C)  DELAY.  By Heritage or the Company, if its Board of Directors so
determines by vote of a majority of the members of the entire Board, in the
event that the Merger is not consummated by April 30, 1999; provided, however,
that a Party that is in material breach of any of the provisions of this Plan
shall not be entitled to terminate the Plan pursuant to this Section 7.1(C).

          (D)  NO SHAREHOLDER APPROVAL.  By Heritage or the Company, if its
Board of Directors so determines by a vote of a majority of the members of its
entire Board, in the event that either of the shareholder approvals contemplated
by Section 6.1 is not obtained at the Meetings, including any adjournment or
adjournments of the Meetings.

          (E)  MARKET PRICE DECLINE.  By the Company, if the Average Closing
Price shall be less than $10.00. If the Company elects to exercise its
termination right pursuant to the immediately preceding sentence, it shall give
to Heritage written notice on or before the second day after the Determination
Date. During the three-day period commencing on the date of such notice,
Heritage shall have the option of increasing the Merger Consideration pursuant
to Section 2.1(A)(3) of this Plan. If Heritage makes an election contemplated by
the preceding sentence, within such three-day period, it shall give prompt
written notice to Company of such election, whereupon no termination shall have
occurred pursuant to this Section and this Agreement shall remain in effect in
accordance with its terms.

     7.2  CONSEQUENCES OF TERMINATION.

          (A)  GENERAL CONSEQUENCES.  Subject to Section 5.7 (Termination Fee),
in the event of the termination or abandonment of this Plan pursuant to the
provisions of Section 7.1, this Plan shall become void and have no force or
effect, without any liability on the part of the Parties or any of their
respective directors or officers or shareholder with respect to this Plan.

          (B)  OTHER CONSEQUENCES.  Notwithstanding anything in this Plan to the
contrary, no termination of this Plan will relieve any Party of any liability
for breach of this Plan or for any misrepresentation under this Plan or be
deemed to constitute a waiver of any remedy available for such breach or
misrepresentation.  In any action or proceeding in connection with such breach
or misrepresentation, the prevailing party will be entitled to reasonable
attorney's fees and expenses.

                                      26
<PAGE>
 
                          ARTICLE VIII. OTHER MATTERS
                                        
     8.1  SURVIVAL.  Only those agreements and covenants in the Plan that by
their express terms apply in whole or in part after the Effective Date shall
survive the Effective Date.  All other representations, warranties, and
covenants shall be deemed only to be conditions of the Merger and shall not
survive the Effective Date.  If the Merger is abandoned and this Plan is
terminated, the provisions of Article VII shall apply and the agreements of the
Parties in Sections 5.6(B), 8.5 and 8.6 shall survive such abandonment and
termination.

     8.2  WAIVER; AMENDMENT.  Prior to the Effective Date, any provision of this
Plan may be (A) waived in writing by the Party benefited by the provision, or
(B) amended or modified at any time (including the structure of the transactions
contemplated by this Plan) by agreement in writing among the Parties approved by
their respective Boards of Directors and executed in the same manner as this
Plan, except that, after the vote by the shareholders of the Company, the
consideration to be received by the shareholders of the Company for each share
of Company Common Stock shall not thereby be altered.  Nothing contained in this
Section 8.2 is intended to modify Heritage's rights pursuant to Section 2.4.

     8.3  COUNTERPARTS.  This Plan may be executed in one or more counterparts,
including facsimile counterparts, each of which shall be deemed to constitute an
original. This Plan shall become effective when one counterpart has been signed
by each Party.

     8.4  GOVERNING LAW.  This Plan shall be governed by, and interpreted in
accordance with, the laws of the State of Washington, except as federal law may
be applicable.

     8.5  EXPENSES.  Each Party will bear all expenses incurred by it in
connection with this Plan and the transactions contemplated by this Plan, except
printing expenses which shall be shared equally between the Company and
Heritage.

     8.6  CONFIDENTIALITY.  Except as otherwise provided in Section 5.6(B), each
of the Parties and their respective agents, attorneys and accountants will
maintain the confidentiality of all information provided in connection herewith
which has not been publicly disclosed.

     8.7  NOTICES.  All notices, requests and other communications hereunder to
a "Party" shall be in writing and shall be deemed to have been duly given when
delivered by hand, telegram, certified or registered mail, overnight courier,
telecopy or telex (confirmed in writing) to such party at its address set forth
below or such other address as such party may specify by notice to the Parties.

If to Heritage to:
                             Heritage Financial Corporation  
                             201 5th Avenue SW               
                             Olympia, WA  98501              
                             Attn:  John Clees, Director     
                             President and CEO               
                             Telephone:  360-943-1500        
                             Telecopy:  360-705-9163          

     Copies to:
                             Jeffrey C. Gerrish           
                             and                          
                             P. Thomas Parrish            
                             Gerrish & McCreary, P.C.     
                             700 Colonial Road, Suite 200 
                             Memphis, TN 38117            
                             Telephone:  901-767-0900     
                             Telecopy:  901-684-2339       

                                      27
<PAGE>
 
If to the Company or the Bank, to:
                             
                             Washington Independent Bancshares, Inc.         
                             537 West Second                                 
                             Toppenish, WA  98948                            
                             Attn:  D. Michael Broadhead, Assistant Secretary
                             Telephone:  509-865-2511                        
                             Telecopy:  509-865-2086                          

     Copies to:
                             Sandra L. Gallagher
                             Gordon, Thomas, Honeywell, Malanca, Peterson & 
                             Daheim, P.L.L.C.
                             1201 Pacific Avenue, Suite 2200
                             Tacoma, WA  98402
                             Telephone:  253-620-6519
                             Telecopy:  253-572-2230

     8.8  ENTIRE UNDERSTANDING; NO THIRD PARTY BENEFICIARIES.  This Plan
represents the entire understanding of the Parties with reference to
transactions contemplated by this Plan, and supersedes any and all other oral or
written agreements previously made.  Nothing in this Plan, expressed or implied,
is intended to confer upon any Person, other than the Parties or their
respective successors, any rights, remedies, obligations or liabilities under or
by reason of this Plan.

     8.9  HEADINGS.  The headings contained in this Plan are for reference
purposes only and are not part of this Plan.



                  (REMAINDER OF PAGE INTENTIONALLY LEFT BLANK)

                                      28
<PAGE>
 
     IN WITNESS WHEREOF, the Parties have caused this instrument to be executed
in counterparts by their duly authorized officers, all as of the day and year
first above written.


HERITAGE FINANCIAL CORPORATION

By:     /s/ John Clees
   -------------------------------------
NAME:   JOHN CLEES
TITLE:  DIRECTOR AND CHAIRMAN OF
        ACQUISITION COMMITTEE


WASHINGTON INDEPENDENT BANCSHARES, INC.

By:     /s/ Dennis H. Peterson
   -------------------------------------
NAME:   DENNIS H. PETERSON
TITLE:  VICE PRESIDENT, DIRECTOR AND
        MEMBER OF ACQUISITION COMMITTEE

By:     /s/ Glen Rasmussen
   -------------------------------------
NAME:   GLENN RASMUSSEN
TITLE:  SECRETARY/TREASURER, DIRECTOR
        AND CHAIRMAN OF ACQUISITION
        COMMITTEE


CENTRAL VALLEY BANK, N.A.

By:     /s/ D. Michael Broadhead
   -------------------------------------
NAME:   D. MICHAEL BROADHEAD
TITLE:  PRESIDENT

                                      29
<PAGE>
 
                                   EXHIBIT A
                                        
                           APPROVAL BY DIRECTORS OF
                    WASHINGTON INDEPENDENT BANCSHARES, INC.
                         AND CENTRAL VALLEY BANK, N.A.
                                        
     Each of the undersigned who together comprise all of the members of the
Board of Directors of Washington Independent Bancshares, Inc. (the "Company")
and Central Valley Bank, N.A., (the "Bank"), approves the Agreement and Plan of
Merger dated as of September 28, 1998 (the "Plan") between Heritage Financial
Corporation, the Company, and the Bank, and, except as otherwise required by
applicable law, including without limitation his fiduciary duties to the
Company's shareholders, agrees to (a) vote his shares of Company Common Stock in
favor of the transactions contemplated by the Plan (collectively, the "Merger"),
(b) recommend to the shareholders of the Company that they approve the Plan, and
(c) refrain from any actions or omissions inconsistent with the foregoing.

     This approval may be executed in one or more facsimile counterparts, each
of which shall be deemed an original, but all of which taken together will
constitute one and the same document.


- ------------------------------         --------------------------------
Mark Bouchey                           Mel Lewis


- ------------------------------         --------------------------------
D. Michael Broadhead                   Dennis Peterson


- ------------------------------         --------------------------------
Ronald Brulotte                        Glenn Rasmussen


- ------------------------------         --------------------------------
Gary Christensen                       Donald V. Rhodes


- ------------------------------         --------------------------------
Frederick Goldberg                     Dennis Richardson


- ------------------------------         --------------------------------
Daryl Jensen                           Frank Roberts
<PAGE>
 
                                   EXHIBIT B
                                        
                             DIRECTOR'S AGREEMENT
                                        
     This Agreement is made and entered into as of the 28th day of September,
1998, between HERITAGE FINANCIAL CORPORATION., a Washington corporation
("Heritage") and _______________ ("Director"), a director of Washington
Independent Bancshares, Inc. ("Bancorp") and/or Central Valley Bank, N.A.(the
"Bank") (Bancorp and the Bank, collectively, being the "Company").

                                   RECITALS
                                        
     1.   Pursuant to the terms of the Agreement and the Plan of Merger dated as
of the 28th day of September, 1998 (the "Plan") among Heritage and the Company,
Bancorp will be merged into Heritage, and the Bank will become the wholly owned
subsidiary of Heritage.

     2.   The obligation of Heritage to consummate the transactions contemplated
by the Plan is conditioned upon its receipt of non-competition agreements from
directors of the Company.

     3.   Director is a shareholder of Bancorp as well as a director of the
Company.

                                   AGREEMENT
                                        
     In consideration of the performance of Heritage under the Plan, Director
agrees that for a period of eighteen (18) months after he ceases to be a
director of the Bank or its successor, he will not, directly or indirectly,
become interested in, as a promoter, principal shareholder, director or officer
of, any financial institution that competes or will compete with Heritage or any
of its subsidiaries or their affiliates within Yakima County in the State of
Washington (the "County").

     Director also agrees that during this eighteen (18) month period, Director
will not directly or indirectly solicit or attempt to solicit on behalf or for
the benefit of any financial institution (i) any employees of the Company,
Heritage, or any of their subsidiaries or affiliates, to leave their employment
for employment with another financial institution or (ii) any customers of the
Company, Heritage, or any of their subsidiaries or affiliates to remove their
business from the Company, Heritage, or any of their subsidiaries or affiliates.
Solicitation prohibited under this section includes solicitation by any means,
including, without limitation, meetings, telephone calls, letters or other
mailings, electronic communication of any kind, and internet communications.

     For purposes of this Agreement, the term "principal shareholder" means any
person who owns, directly or indirectly, five percent (5%) or more of the
outstanding shares of any voting class of equity security of a company.

     Director recognizes and agrees that any breach of this Agreement by him
will entitle Heritage and any of its successors or assigns to injunctive relief
and/or specific performance, as well as any other legal or equitable remedies to
which such entities may otherwise be entitled.  The substantially prevailing
party in any such dispute will be entitled to recover from the other party its
costs and expenses, including specifically, reasonable attorneys' fees.

     The provisions of this Agreement are severable, and the invalidity of any
provision will not affect the validity of other provisions.  If a court of
competent jurisdiction deems that the duration,  geographic scope, or other
restriction imposed by this Agreement is unenforceable, such court may reform
the restriction as is necessary to make such restriction enforceable.

Executed as of the 28th day of September, 1998.

HERITAGE FINANCIAL CORPORATION         DIRECTOR

By:___________________________         ______________________________
Its:__________________________
                              
<PAGE>
 
                                   EXHIBIT C
                                        
                    WASHINGTON INDEPENDENT BANCSHARES, INC.
                     AFFILIATE UNDERTAKINGS AND AGREEMENTS

     A.   The undersigned understands that he or she  may be deemed to be an
"affiliate" of Washington Independent Bancshares, Inc. ("Company") with respect
to the matters set forth below, and further understands that:

          1.   Pursuant to the Agreement and Plan of Merger, dated September 28,
1998 (the "Plan"), between Heritage Financial Corporation. ("Heritage"), the
Company, and its wholly owned subsidiary Central Valley Bank, N.A., execution of
this document is a condition to the merger transaction ("Merger") contemplated
by the Plan.

          2.   Pursuant to the Securities and Exchange Commission ("SEC") Rule
145 ("Rule 145") under the Securities Act of 1933, as amended ("Act"), the
transferability of the Heritage Common Stock received by affiliates in
connection with the Merger will be restricted.

     B.   The undersigned hereby agrees and undertakes not to transfer, sell or
otherwise dispose of any shares of Heritage Common Stock received in connection
with the Merger, except (a) pursuant to an effective Registration Statement
under the Act covering such Heritage Common Stock, or (b) as permitted by the
provisions of Rule 145 under the Act, or (c) if the undersigned furnishes to
Heritage an opinion of counsel, satisfactory to counsel for Heritage, to the
effect that registration under the Act is not required for the proposed sale,
transfer or other disposition, or (d) if the undersigned furnishes to Heritage a
copy of a "no-action" or interpretive letter from the staff of the SEC to the
effect that the proposed sale, transfer or other disposition of such Heritage
Common Stock may be effected without registration under the Act.

     C.   The undersigned hereby agrees that the undersigned will not sell,
transfer, or otherwise dispose of the undersigned's interests in, or reduce the
undersigned's risk relative to, any of the shares of Heritage Common Stock into
which the undersigned's shares of Company Common Stock are converted upon
consummation of the Merger until such time as the requirements of SEC Accounting
Series Release Nos. 130 and 135 ("ASR 130 and 135") have been met.  The
undersigned understands that ASR 130 and 135 relate to publication of financial
results of post-Merger combined operations of Heritage and Company.  Heritage
agrees that it will publish such results within 45 days after the end of the
first full fiscal quarter of Heritage containing the required period of post-
Merger combined operations.

     D.   The undersigned is not aware of any plan or intention on the part of
any Company shareholder or shareholders collectively holding 50% or more of the
outstanding shares of the Company to sell or otherwise dispose of Heritage
Common Stock to be received in the Merger.

     E.   The undersigned understands that Heritage will furnish to the
undersigned upon his or her written request a written statement that Heritage
has complied with the reporting requirements specified in paragraph (c)(1) of
Rule 144 under the Act, and that Heritage will so comply as long as the
undersigned  holds the Heritage Common Stock received in connection with the
Merger.

     F.   The undersigned further understands and agrees that Heritage will
issue stop-transfer instructions to its transfer agent respecting shares of
Heritage Common Stock issued to the undersigned in connection with the Merger,
and that the restrictive legend set forth below will be placed on certificates
delivered to the undersigned evidencing such shares of Heritage Common Stock:

          "The shares evidenced by this certificate were received by an
     "affiliate" of a corporation in a transaction (the acquisition of
     Washington Independent Bancshares, Inc.) pursuant to Rule 145 of the
     Securities and Exchange Commission under the Securities Act of 1933, as
     amended. The transferability, sale or other disposition of these shares is
     thus restricted. Reference is made to a letter agreement and undertaking
     signed by such affiliate, a copy of which is on file in the principal
     office of Heritage Financial Corporation., for a description of the
     restrictions on the transfer of shares represented hereby."
<PAGE>
 
     G.   The term "Heritage Common Stock" as used in this letter shall mean and
include not only the common stock of Heritage as presently constituted, but also
any other stock which may be issued in exchange for, in lieu of, or in addition
to, all or any party of such common stock.

     H.   This Agreement may be signed in one or more facsimile counterparts,
each of which will be deemed an original, but all of which taken together will
constitute one and the same document.

     IN WITNESS WHEREOF, I have signed my name on this _____ day of __________,
1998.


                                       ________________________________
                                       Director, Executive Officer, or
                                       Principal Shareholder


                                       _________________________________
                                       Print Name

Accepted and Agreed To:

HERITAGE FINANCIAL CORPORATION

By:_________________________
Its:_________________________

                                       2
<PAGE>
 
                                   EXHIBIT D

                           CENTRAL VALLEY BANK, N.A.
                             EMPLOYMENT AGREEMENT

     THIS EMPLOYMENT AGREEMENT ("Agreement"), signed September 28, 1998, between
CENTRAL VALLEY BANK, N.A. (the "Bank") and D. MICHAEL BROADHEAD ("Executive")
takes effect on the effective date of the Merger ("Effective Date").

                                    RECITALS
                                    --------
                                        
A.   Washington Independent Bancshares, Inc. which is the parent company of the
     Bank, intends to merge into Heritage Financial Corporation. ("Heritage"),
     and the Bank will thereby become the wholly owned subsidiary of Heritage
     (the "Merger") under the terms of the Agreement and Plan of Merger dated as
     of September 28, 1998 ("Plan") between the parties.

B.   Executive is presently the Bank's President. The Bank wishes to continue
     Executive's employment in that capacity under the terms and conditions of
     this Agreement.

C.   Under the terms of this Agreement, Executive wishes to continue his
     employment with the Bank (or its successor, if any) for the period provided
     in this Agreement.

                                   AGREEMENT
                                   ---------
                                        
     The parties agree as follows.

1.   EMPLOYMENT.  The Bank will continue Executive's employment during the Term
     and any Extended Term (as defined below), and Executive accepts employment
     by the Bank, on the terms and conditions set forth in this Agreement.
     Executive's title will be "President."

2.   EFFECTIVE DATE AND TERM.

     (a)  Term.  The initial term of this Agreement ("Term") commences on the
          Effective Date and terminates on December 31, 2002.

     (b)  Automatic Renewal.  This Agreement shall renew automatically at the
          end of the Term for one additional year (an "Extended Term") and shall
          renew automatically at the end of the Extended Term for additional
          successive one year terms (each successive one year term also an
          "Extended Term") unless Executive gives the Bank or Bank gives the
          Executive written notice at least 90 days before the end of the Term
          or an Extended Term (as the case may be) of his or its intent that
          this Agreement not be renewed.

     (c)  Abandonment of the Merger.  If the Plan terminates before Closing,
          this Agreement will not become effective and will be void.

3.   DUTIES. Executive will faithfully and diligently perform the duties
     assigned to Executive from time to time by the Bank's board of directors,
     by Heritage's board of directors, or by the President or CEO of Heritage.
     In the event that Heritage elects to merge the Bank into Heritage Bank or
     some other affiliate or Heritage, then the title and duties of Executive
     with respect to the entity surviving such merger shall be determined by the
     President and CEO of Heritage or his designee. Executive will use his best
     efforts to perform his duties and will devote his full time and attention
     to these duties during working hours during the Term and any Extended Term.
     These duties will include, without limitation, the following:
<PAGE>
 
     (a)  Bank Performance. Executive will be responsible for all aspects of the
          Bank's performance, including, without limitation, directing that
          daily operational and managerial matters are performed in a manner
          consistent with Heritage's and the Bank's policies. These duties will
          also include formulating and implementing the Bank's expansion
          strategies and performing all other tasks in connection with the
          Bank's management and affairs that are normal and customary to
          Executive's position.

     (b)  Integration with Heritage.  Executive will participate in the
          integration of the Bank's commercial banking activities with
          Heritage's existing operations.

     (c)  Development and Preservation of Business. Executive will be
          responsible for the development and preservation of banking
          relationships and other business development efforts (including
          appropriate civic and community activities) in the Bank's market
          areas.

     (d)  Report to Board.  Executive will report directly to the Bank's CEO or
          to the CEO of Heritage as designated from time to time. The Bank's or
          Heritage's board of directors may, from time to time, modify
          Executive's title or add to, delete from, or modify Executive's
          performance responsibilities to accommodate management succession, as
          well as any other management objectives of the Bank or of Heritage
          subject to Section 10(b) of this Agreement. Executive will assume any
          additional positions, duties, and responsibilities as may reasonably
          be requested of him with or without additional compensation, as
          appropriate and consistent with Sections 3(a), 3(b), and 3(c) of this
          Agreement.

4.   SALARY; VACATION.  During the Term, Executive will receive a base salary of
     not less than $110,000 per year, to be paid in accordance with the Bank's
     regular payroll schedule for executives. During any Extended Term,
     Executive will receive a base salary of not less than his base salary at
     the time of the commencement of the then current Extended Term, to be paid
     in accordance with the Bank's regular payroll schedule for executives.
     Executive will be entitled to four weeks of vacation during the Term or any
     Extended Term. Payment, if any, for unused vacation time will be according
     to bank policy in effect at the time.

5.   INCENTIVE COMPENSATION.  The Bank's board of directors, subject to
     ratification by Heritage's board of directors, will determine the amount of
     bonus, if any, to be paid by the Bank to Executive for each year during the
     Term or any Extended Term. Executive will participate in any existing or
     subsequent management incentive plan of Heritage or Bank to the same extent
     as officers with similar responsibilities. Executive's bonus, if any, will
     reflect Executive's contribution to the performance of the Bank during the
     year.

6.   INCOME DEFERRAL AND BENEFITS.

     (a)  Subject to eligibility requirements and in accordance with and subject
          to any policies adopted by the Bank's or Heritage's board of directors
          with respect to any benefit plans or programs, Executive will be
          entitled to receive benefits (including stock options) comparable to
          those offered to other executive officers of Heritage and its
          subsidiaries with position and duties comparable to those of
          Executive.  Neither the Bank nor Heritage through this Agreement
          obligates itself to make any particular benefits available to its
          employees or executive officers.

     (b)  In addition to the regular compensation and benefits provided to
          Executive by this Agreement, Bank shall pay Executive on December 31,
          2005 (whether or not Executive is still employed with Bank at or prior
          to that time) a sum (not to exceed $200,000) of $40,000, plus $10,000
          for each full year of service at Bank or its successor completed by
          Executive.

     (c)  In the event Executive dies during the term of this Agreement, Bank
          shall pay to Executive's estate the sum of $100,000 or the amount
          which has been vested pursuant to paragraph 6(b) whichever is greater
          with the amount not to exceed $200,000.  Such amount will be payable
          within 90 days of death and shall be in lieu of any amount payable
          pursuant to paragraph 6(b) above.

                                       2
<PAGE>
 
     (d)  Bank agrees to provide Executive with a vehicle for Executive's
          business use.

7.   BUSINESS EXPENSES. The Bank will reimburse Executive for ordinary and
     necessary expenses (including, without limitation, travel, entertainment,
     and similar expenses) incurred in performing and promoting the Bank's
     business. Executive will present from time to time itemized accounts of
     these expenses, subject to any limits of Bank policy or the rules and
     regulations of the Internal Revenue Service.

8.   TERMINATION.

     (a)  Termination By Bank for Cause.  If, before the end of the Term or any
          Extended Term, the Bank terminates Executive's employment for Cause or
          Executive terminates his employment without Good Reason, the Bank will
          pay Executive the salary earned and expenses reimbursable under this
          Agreement incurred through the date of Executive's termination.
          Executive will have no right to receive compensation or other benefits
          for any period after termination under this section 8(a), and
          Executive will be subject to the noncompetition and nonsolicitation
          requirements of Section 12 through the remainder of the Term or
          Extended Term in which termination occurs and for the three-year
          period following such Term or Extended Term in which termination
          occurs.

     (b)  Other Termination By Bank.  If before the end of the Term or any
          Extended Term, the Bank terminates Executive's employment without
          Cause or Executive terminates his employment for Good Reason (defined
          below), the Bank will pay Executive for the remainder of the Term or
          Extended Term in which termination occurs the salary Executive would
          have been entitled to under this Agreement if his employment had not
          terminated. If Executive is terminated pursuant to this Section 8(b),
          Executive will be subject to the noncompetition and nonsolicitation
          requirements of Section 12 only through the remainder of the Term or
          Extended Term in which termination occurs.

     (c)  Death or Disability.  This Agreement terminates (1) if Executive dies
          or (2) if Executive is unable to perform his duties and obligations
          under this Agreement for a period of 90 days as a result of a physical
          or mental disability arising at any time during the term of this
          Agreement (such inability being "Disabled"), unless with reasonable
          accommodation Executive could continue to perform his duties under
          this Agreement and making these accommodations would not require the
          Bank to expend any funds. The Bank or its successor's Board of
          Directors, acting in good faith, will make the final determination of
          whether Executive is Disabled, and for purposes of making such
          determination, may require Executive to submit to a physical
          examination by a physician mutually agreed upon by Executive and the
          Board of Directors. If termination occurs under this Section 8(c),
          Executive or his estate will be entitled to receive only the
          compensation and benefits earned and expenses reimbursable through the
          date of such termination.

     (d)  Termination Related to a Change in Control.

          (1)  Termination by Bank.  If the Bank, or its successor in interest
               by merger, or its transferee in the event of a purchase and
               assumption transaction, for reasons other than Executive's death,
               disability, or Cause (1) terminates Executive's employment within
               one year following a Change in Control (as defined below) or (2)
               terminates Executive's employment before the Change in Control
               but on or after the date that any party either announces or is
               required by law to announce any prospective Change in Control
               transaction and a Change in Control occurs within twelve months
               after the termination, the Bank will pay Executive an amount
               equal to 36 months of Executive's Base Salary for the calendar
               year in which Executive's employment is terminated (the "Change
               in Control Payment").

          (2)  Termination by Executive.  If Executive terminates Executive's
               employment, with or without Good Reason, within one year
               following a Change in Control, the Bank will pay Executive the
               Change in Control Payment.

     (e)  Limitations on Payments Related to Change in Control.  Notwithstanding
          any other provision of this Agreement:

                                       3
<PAGE>
 
          (1)  the Change in Control Payment will be less than the amount that
               would cause it to be a "parachute payment" within the meaning of
               Section 280G(b)(2)(A) of the Internal Revenue Code of 1986, as
               amended (the "Internal Revenue Code");

          (2)  the Change in Control Payment will be reduced by any salary that
               Executive receives from the Bank or its successor after the
               Change in Control; and

          (3)  Executive's right to receive the Change in Control Payment
               terminates (i) immediately, if before the Change in Control
               transaction closes, Executive terminates his employment without
               Good Reason or the Bank terminates Executive's employment for
               Cause, or (ii) one year after a Change in Control occurs.

     (f)  Definition of "Change in Control".  "Change in Control" means a change
          "in the ownership or effective control" or "in the ownership of a
          substantial portion of the assets" of Heritage, within the meaning of
          Section 280G of the Internal Revenue Code.

     (g)  Return of Bank Property.  If and when Executive ceases for any reason
          to be employed by Bank, Executive must return to the Bank all keys,
          pass cards, identification cards and any other property of the Bank or
          Heritage.  At the same time, Executive also must return to the Bank
          all originals and copies (whether in hard copy, electronic or other
          form) of any documents, drawings, notes, memoranda, designs, devices,
          diskettes, tapes, manuals, and specifications which constitute
          proprietary information or material of the Bank or Heritage.  The
          obligations in this paragraph include the return of documents and
          other materials which may be in Executive's desk at work, in
          Executive's car or place of residence, or in any other location under
          Executive's control.

9.   DEFINITION OF "CAUSE".  "Cause" means any one or more of the following:

     (a)  Willful misfeasance or gross negligence in the performance of
          Executive's duties;

     (b)  Conviction of a crime in connection with his duties;

     (c)  Conduct demonstrably and significantly harmful to the Bank, as
          reasonably determined by the Bank's or Heritage's board of directors
          on the advice of legal counsel of Bank or Heritage; or

     (d)  Permanent disability, meaning a physical or mental impairment which
          renders Executive incapable of substantially performing the duties
          required under this Agreement, and which is expected to continue
          rendering Executive so incapable for the reasonably foreseeable
          future.

10.  DEFINITION OF "GOOD REASON".  "Good Reason" means only any one or more of
     the following:

     (a)  Reduction, without Executive's consent, of Executive's salary or
          elimination of any compensation or benefit plan benefiting Executive,
          unless the reduction or elimination is generally applicable to
          substantially all similarly situated Bank Executives (or Executives of
          a successor or controlling entity of the Bank) formerly benefited;

     (b)  The assignment to Executive without his consent of any authority or
          duties materially inconsistent with Executive's position as of the
          date of this Agreement; or

     (c)  A relocation or transfer of Executive's current business office that
          would require Executive to commute on a regular basis more than 60
          miles each way from his current business office at the Bank on the
          date of this Agreement, unless Executive consents to the relocation or
          transfer.

11.  CONFIDENTIALITY.  Executive will not, after signing this Agreement,
     including during and after its Term, use for his own purposes or disclose
     to any other person or entity and confidential information concerning the
     Bank or Heritage or their business operations or customers, unless (1) the
     Bank or Heritage consents to the use or 

                                       4
<PAGE>
 
     disclosure of their respective confidential information, (2) the use or
     disclosure is consistent with Executive's duties under this Agreement, or
     (3) disclosure is required by law or court order.

12.  NONCOMPETITION.

     (a)  Participation in a Competition Business.  During the Term or any
          Extended Term and for three years after expiration of Term or any
          Extended Term (such three years being the "Post-Term Period")
          (regardless of whether Executive's employment ends at the end of the
          Term or any Extended Term or at some other point after the end of the
          Term or any Extended Term), Executive will not become involved with a
          Competing Business or serve, directly or indirectly, a Competing
          Business in any manner, including, without limitation, as a
          shareholder, member, partner, director, officer, manager, investor,
          organizer, "founder," employee, consultant, or agent; provided,
          however, that Executive may acquire and own an interest not to exceed
          2% of the total equity interest in any publicly held entity whose
          equity securities are listed on a national securities exchange (even
          if such entity is a Competing Business). Executive's noncompetition
          obligations for the Post-Term Period will not apply if (1) Executive's
          employment during the Term or any Extended Term is terminated without
          Cause, (2) Executive terminates his employment during the Term or any
          Extended Term for Good Reason, or (3) the Bank or its successor
          declines to employ Executive after expiration of the Term or any
          Extended Term.

     (b)  No Solicitation.  During the Term or any Extended Term and the Post-
          Term Period (regardless of whether Executive's employment ends at the
          end of the Term or any Extended Term or at some other point after the
          end of the Term or any Extended Term) Executive will not directly or
          indirectly solicit or attempt to solicit (1) any employees located in
          Yakima County in Washington State (the "County") of the Bank,
          Heritage, or any of Heritage's Subsidiaries, to leave their employment
          or (2) and customers located in Yakima County of the Bank , Heritage,
          or any of Heritage's Subsidiaries to remove their business from the
          Bank, Heritage, or any of Heritage's Subsidiaries, or to participate
          in any manner in a Competing Business. Solicitation prohibited under
          this Section includes solicitation by any means, including, without
          limitation, meetings, letters or other mailings, electronic
          communications of any kind, and internet communications. Executive's
          nonsolicitation obligations for the Post-Term Period will not apply if
          (1) Executive's employment during the Term or any Extended Term is
          terminated without Cause, (2) Executive terminates his employment
          during the Term or any Extended Term for Good Reason, or (3) the Bank
          or its successor declines to employ Executive after expiration of the
          Term or any Extended Term.

     (c)  Employment Outside the County.  Nothing in this Agreement prevents
          Executive from accepting employment after the end of the Term or any
          Extended Term outside the County from a Competing Business, as long as
          Executive will not (a) act as an employee or other representative or
          agent of the Competing Business within the County (b) have any
          responsibilities for the Competing Business' operations within the
          County.

     (d)  Competing Business.  "Competing Business" means any financial
          institution or trust company that competes with, or will compete in
          the County with, Heritage, the Bank, or any of Heritage's
          Subsidiaries. The term "Competing Business" includes, without
          limitation, any start-up or other financial institution or trust
          company in formation.

13.  ENFORCEMENT.

     (a)  The Bank and Executive stipulate that, in light of all of the facts
          and circumstances of the relationships between Executive and the Bank,
          the agreements referred to in Sections 11 and 12 (including without
          limitation their scope, duration and geographic extent) are fair and
          reasonably necessary for the protection of the Bank's and Heritage's
          confidential information, goodwill and other protectable interests. If
          a court of competent jurisdiction should decline to enforce any of
          those covenants and agreements, Executive and the Bank request the
          court to reform these provisions to restrict Executive's use of
          confidential information and Executive's ability to compete with the
          Bank 

                                       5
<PAGE>
 
          and Heritage to the maximum extent, in time, scope of activities,
          and geography, the court finds enforceable.

     (b)  Executive acknowledges that the Bank and Heritage will suffer
          immediate and irreparable harm that will not be compensable by damages
          alone, if Executive repudiates or breaches any of the provisions of
          Sections 11 or 12 or threatens or attempts to do so. For this reason,
          under these circumstances, the Bank and Heritage, in addition to and
          without limitation of any other rights, remedies or damages available
          to it at law or in equity, will be entitled to obtain temporary,
          preliminary, and permanent injunctions in order to prevent or restrain
          the breach, and neither the Bank nor Heritage will be required to post
          a bond as a condition for the granting of this relief.

14.  ADEQUATE CONSIDERATION.  Executive specifically acknowledges the receipt of
     adequate consideration for the covenants contained in Sections 11 and 12
     and that the Bank is entitled to require him to comply with these Sections.
     These Sections will survive termination of this Agreement. Executive
     represents that if his employment is terminated, whether voluntarily or
     involuntarily, Executive has experience and capabilities sufficient to
     enable Executive to obtain employment in areas which do not violate this
     Agreement and the Bank's enforcement of a remedy by way of injunction will
     not prevent Executive from earning a livelihood.

15.  ARBITRATION.

     (a)  Arbitration.  At either party's request, the parties must submit any
          dispute, controversy or claim arising out of or in connection with, or
          relating to, this Agreement or any breach or alleged breach of this
          Agreement, to arbitration under the American Arbitration Association's
          rules then in effect (or under any other form of arbitration mutually
          acceptable to the parties). A single arbitrator agreed on by the
          parties will conduct the arbitration. If the parties cannot agree on a
          single arbitrator, each party must select one arbitrator and those two
          arbitrators will select a third arbitrator. This third arbitrator will
          hear the dispute. The arbitrator's decision is final (except as
          otherwise specifically provided by law) and binds the parties, and
          either party may request any court having jurisdiction to enter a
          judgment and to enforce the arbitrator's decision. The arbitrator will
          provide the parties with a written decision naming the substantially
          prevailing party in the action. This prevailing party is entitled to
          reimbursement from the other party for its costs and expenses,
          including reasonable attorney's fees.

     (b)  Governing Law.  All proceedings will be held at a place designated by
          the arbitrator in Thurston County, Washington. The arbitrator, in
          rendering a decision as to any state law claims, will apply Washington
          law.

     (c)  Exception to Arbitration.  Notwithstanding the above, if Executive
          violates Sections 11 or 12, the Bank will have the right to initiate
          the court proceedings described in Section 13(b), in lieu of an
          arbitration proceeding under this Section 15. The Bank may initiate
          these proceeding wherever appropriate within Washington State; but
          Executive will consent to venue and jurisdiction in Thurston County,
          Washington.

16.  MISCELLANEOUS PROVISIONS.

     (a)  Defined Terms.  Capitalized terms used as defined terms, but not
          defined in this Agreement, will have the meanings assigned to those
          terms in the Plan.

     (b)  Entire Agreement.  This Agreement constitutes the entire understanding
          between the parties concerning its subject matter and supersedes all
          prior agreements. Accordingly, Executive specifically waives the terms
          of and all of his rights under all employment, change-in-control and
          salary continuation agreements, whether written or oral, he has
          entered into with the Bank or any of its Subsidiaries or affiliates.

     (c)  No Right to Continued Employment.  Nothing in this Agreement, express
          or implied, is intended to confer upon Executive the right to
          continued employment with the Bank after the Initial Term.

                                       6
<PAGE>
 
     (d)  Binding Effect.  This Agreement will bind and inure to the benefit of
          the Bank's, Heritage's, and Executive's heirs, legal representatives,
          successors and assigns.

     (e)  Litigation Expenses.  If either party successfully seeks to enforce
          any provision of this Agreement or to collect any amount claimed to be
          due under it, this party will be entitled to reimbursement from the
          other party for any and all of its out-of-pocket expenses and costs
          including, without limitation, reasonable attorneys' fees and costs
          incurred in connection with the enforcement or collection.

     (f)  Waiver.  Any waiver by a party of its rights under this Agreement must
          be written and signed by the party waiving its rights. A party's
          waiver of the other party's breach of any provision of this Agreement
          will not operate as a waiver of any other breach by the breaching
          party.

     (g)  Counsel Review.  Executive acknowledges that he has had the
          opportunity to consult with independent counsel with respect to the
          negotiation, preparation, and execution of this Agreement.

     (h)  Assignment. The services to be rendered by executive under this
          Agreement are unique and personal. Accordingly, Executive may not
          assign any of his rights or duties under this Agreement.

     (i)  Amendment.  This Agreement may not be modified or amended except by a
          written instrument signed by both parties with the prior written
          consent of Heritage.

     (j)  Severability.  The provisions of this Agreement are severable. The
          invalidity of any provision will not affect the validity of other
          provisions of this Agreement.

     (k)  Governing Law and Venue. This Agreement will be governed by and
          construed in accordance with Washington law, except to the extent that
          certain matters may be governed by federal law. Except as otherwise
          provided in Section 15(c), the parties must bring any legal proceeding
          arising out of this Agreement in Thurston County, Washington, and the
          parties will submit to jurisdiction in that county.

     (l)  Counterparts. This Agreement may be executed in one or more facsimile
          counterparts, each of which will be deemed an original, but all of
          which taken together will constitute one and the same document.

Signed: September 28, 1998:             CENTRAL VALLEY BANK, N.A.

                                        __________________________________
                                        By:  Donald V. Rhodes
                                        Its:  Chief Executive Officer

                                        D. MICHAEL BROADHEAD, individually

                                        __________________________________
                                        D. Michael Broadhead

                                       7
<PAGE>
 
                                   EXHIBIT E

                           CENTRAL VALLEY BANK, N.A.
                             EMPLOYMENT AGREEMENT

     THIS EMPLOYMENT AGREEMENT ("Agreement"), signed September 28, 1998, between
CENTRAL VALLEY BANK, N.A. (the "Bank") and DAVID J. PERRY (Employee") takes
effect on the effective date of the Merger ("Effective Date").

                                   RECITALS
                                   --------
                                        
A.   Washington Independent Bancshares, Inc. which is the parent company of the
     Bank, intends to merge into Heritage Financial Corporation ("Heritage"),
     and the Bank will thereby become the wholly owned subsidiary of Heritage
     (the "Merger") under the terms of the Agreement and Plan of Merger dated as
     of September 28, 1998 ("Plan") between the parties.

B.   Employee is presently the Bank's Senior Vice President. The Bank wishes to
     continue Employee's employment in that capacity under the terms and
     conditions of this Agreement.

C.   Under the terms of this Agreement, Employee wishes to continue his
     employment with the Bank (or its successor, if any) for the period provided
     in this Agreement.

                                   AGREEMENT
                                   ---------
                                        
     The parties agree as follows.

1.   EMPLOYMENT. The Bank will continue Employee's employment during the Term,
     and Employee accepts employment by the Bank, on the terms and conditions
     set forth in this Agreement. Employee's title will be "Senior Vice
     President."

2.   EFFECTIVE DATE AND TERM.

     (a)  Term. The term of this Agreement ("Term") commences on the Effective
          Date and terminates on December 31, 2001.

     (b)  Automatic Renewal. This Agreement shall renew automatically at the end
          of the Term for one additional year (an "Extended Term") and shall
          renew automatically at the end of the Extended Term for additional
          successive one year terms (each successive one year term also an
          "Extended Term") unless Employee gives the Bank or Bank gives the
          Employee written notice at least 90 days before the end of the Term or
          an Extended Term (as the case may be) of his or its intent that this
          Agreement not be renewed.

     (c)  Abandonment of the Merger. If the Plan terminates before Closing, this
          Agreement will not become effective and will be void.

3.   DUTIES.  Employee will faithfully and diligently perform the duties
     assigned to Employee from time to time by the Bank's President or his
     designee as designated from time to time, consistent with the duties that
     have been normal and customary to Employee's position. Employee will use
     his best efforts to perform his duties and will devote his full time and
     attention to these duties during working hours. Employee will report
     directly to the Bank's President or his designee. The Bank's or Heritage's
     board of directors may, from time to time, modify Employee's title or
     performance responsibilities, subject to Section 10(b) of this Agreement,
     to accommodate management succession, as well as any other management
     objectives of the Bank or of Heritage subject to Section 10(b) of this
     Agreement. In the event that Heritage elects to merge the bank into
     Heritage Bank or some other affiliate of Heritage, then the title and
     duties of Employee with respect to the entity surviving such merger shall
     be determined by the President and CEO of Heritage or his designee.
<PAGE>
 
     Employee will assume any additional positions, duties, and responsibilities
     as may reasonably be requested of him with or without additional
     compensation, as appropriate and consistent with this Section 3.

4.   SALARY.  Initially, Employee will receive a base salary of not less than
     $73,800 per year, to be paid in accordance with the Bank's regular payroll
     schedule for employees.

5.   INCENTIVE COMPENSATION.  The Bank's board of directors, subject to
     ratification by Heritage's board of directors, will determine the amount of
     bonus, if any, to be paid by the Bank to Employee for each year during the
     Initial Term. Employee will participate in any existing or subsequent
     management incentive plan of Heritage or Bank to the same extent as
     officers with similar responsibilities. Employee's bonus, if any, will
     reflect Employee's contribution to the performance of the Bank during the
     year.

6.   INCOME DEFERRAL AND BENEFITS.  Subject to eligibility requirements and in
     accordance with and subject to any policies adopted by the Bank's or
     Heritage's board of directors with respect to any benefit plans or
     programs, Employee will be entitled to receive benefits (including stock
     options) similar to those offered to other officers of Heritage and its
     subsidiaries with position and duties comparable to those of Employee.
     Neither the Bank nor Heritage through this Agreement obligates itself to
     make any particular benefits available to its employees or executive
     officers.

7.   BUSINESS EXPENSES.  The Bank will reimburse Employee for ordinary and
     necessary expenses (including, without limitation, travel, entertainment,
     and similar expenses) incurred in performing and promoting the Bank's
     business. Employee will present from time to time itemized accounts of
     these expenses, subject to any limits of Bank policy or the rules and
     regulations of the Internal Revenue Service.

8.   TERMINATION.

     (a)  Termination By Bank for Cause.  If, before the end of the Term or any
          Extended Term, the Bank terminates Employee's employment for Cause or
          Employee terminates his employment without Good Reason, the Bank will
          pay Employee the salary earned and expenses reimbursable under this
          Agreement incurred through the date of Employee's termination.
          Employee will have no right to receive compensation or other benefits
          for any period after termination under this section 8(a), and Employee
          will be subject to the noncompetition and nonsolicitation requirements
          of Section 12 through the remainder of the Term or any Extended Term
          in which termination occurs and for the two-year period following the
          Term or any Extended Term in which termination occurs.

     (b)  Other Termination By Bank.  If before the end of the Term or any
          Extended Term, the Bank terminates Employee's employment without Cause
          or Employee terminates his employment for Good Reason (defined below),
          the Bank will pay Employee for the remainder of the Term or any
          Extended Term the salary Employee would have been entitled to under
          this Agreement if his employment had not terminated. If Employee is
          terminated pursuant to this Section 8(b), Employee will be subject to
          the noncompetition and nonsolicitation requirements of Section 12
          through the remainder of the Term or any Extended Term in which
          termination occurs only.

     (c)  Death or Disability.  This Agreement terminates (1) if Employee dies
          or (2) if Employee is unable to perform his duties and obligations
          under this Agreement for a period of 90 days as a result of a physical
          or mental disability arising at any time during the term of this
          Agreement (inability being "disabled"), unless with reasonable
          accommodation Employee could continue to perform his duties under this
          Agreement and making these accommodations would not require the Bank
          to expend any funds.  The Bank or its successor's Board of Directors,
          acting in good faith, will make the final determination of whether
          Employee is Disabled, and for purposes of making such determination,
          may require Employee to submit to a physical examination by a
          physician mutually agreed upon by Employee and the Board of Directors.
          If termination occurs under this Section 8(c), Employee or his estate
          will be entitled to receive only the compensation and benefits earned
          and expenses reimbursable through the date of such termination.

                                       2
<PAGE>
 
     (d)  Termination Related to a Change in Control.

          (1)  Termination by Bank.  If the Bank, or its successor in interest
               by merger, or its transferee in the event of a purchase and
               assumption transaction, for reasons other than Employee's death,
               disability, or Cause (1) terminates Employee's employment within
               one year following a Change in Control (as defined below) or (2)
               terminates Employee's employment before the Change in Control but
               on or after the date that any party either announces or is
               required by law to announce any prospective Change in Control
               transaction and a Change in Control occurs within twelve months
               after the termination, the Bank will pay Employee an amount equal
               to 24 months of Employee's base salary for the calendar year in
               which Employee's employment is terminated (the "Change in Control
               Payment").

          (2)  Termination by Employee.  If Employee terminates Employee's
               employment, with or without Good Reason, within one year
               following a Change in Control, the Bank will pay employee the
               Change in Control Payment.

     (e)  Limitations on Payments Related to Change in Control.  Notwithstanding
          any other provision of this Agreement:

          (1)  the Change in Control Payment will be less than the amount that
               would cause it to be a "parachute payment" within the meaning of
               Section 280G(b)(2)(A) of the Internal Revenue Code of 1986, as
               amended (the "Internal Revenue Code");

          (2)  the Change in Control Payment will be reduced by any salary that
               Employee receives from the Bank or its successor after the Change
               in Control; and

          (3)  Employee's right to receive the Change in Control Payment
               terminates (i) immediately, if before the Change in Control
               transaction closes, Employee terminates his employment without
               Good Reason or the Bank terminates Employee's employment for
               Cause, or (ii) one year after a Change in Control occurs.

     (f)  Definition of "Change in Control".  "Change in Control" means a change
          "in the ownership or effective control" or "in the ownership of a
          substantial portion of the assets" of Heritage, within the meaning of
          Section 280G of the Internal Revenue Code.

     (g)  Return of Bank Property.  If and when Employee ceases, for any reason,
          to be employed by the Bank, Employee must return to the Bank all keys,
          pass cards, identification cards and any other property of the Bank or
          Heritage.  At the same time, Employee also must return to the Bank all
          originals and copies (whether in hard copy, electronic or other form)
          of any documents, drawings, notes, memoranda, designs, devices,
          diskettes, tapes, manuals, and specifications which constitute
          proprietary information or material of the Bank or Heritage.  The
          obligations in this paragraph include the return of documents and
          other materials which may be in Employee's desk at work, in Employee's
          car or place of residence, or in any other location under Employee's
          control.

9.   DEFINITION OF "CAUSE".  "Cause" means any one or more of the following:

     (a)  Willful misfeasance or gross negligence in the performance of
          Employee's duties;

     (b)  Conviction of a crime in connection with his duties;

     (c)  Conduct demonstrably and significantly harmful to the Bank, as
          reasonably determined by the Bank's or Heritage's board of directors
          on the advice of legal counsel of the Bank or Heritage; or

     (d)  Permanent disability, meaning a physical or mental impairment which
          renders Employee incapable of substantially performing the duties
          required under this Agreement, and which is expected to continue
          rendering Employee so incapable for the reasonably foreseeable future.

                                       3
<PAGE>
 
10.  DEFINITION OF "GOOD REASON".  "Good Reason" means only any one or more of
     the following:

     (a)  Reduction, without Employee's consent, of Employee's salary or
          elimination of any compensation or benefit plan benefiting Employee,
          unless the reduction or elimination is generally applicable to
          substantially all similarly situated Bank employees (or employees of a
          successor or controlling entity of the Bank) formerly benefited;

     (b)  The assignment to Employee without his consent of any authority or
          duties materially inconsistent with Employee's position as of the date
          of this Agreement; or

     (c)  A relocation or transfer of Employee's current business office that
          would require Employee to commute on a regular basis more than 60
          miles each way from his current business office at the Bank on the
          date of this Agreement, unless Employee consents to the relocation or
          transfer.

11.  CONFIDENTIALITY.  Employee will not, after signing this Agreement,
     including during and after its Term, use for his own purposes or disclose
     to any other person or entity and confidential information concerning the
     Bank or Heritage or their business operations or customers, unless (1) the
     Bank or Heritage consents to the use or disclosure of their respective
     confidential information, (2) the use or disclosure is consistent with
     Employee's duties under this Agreement, or (3) disclosure is required by
     law or court order.

12.  NONCOMPETITION.

     (a)  Participation in a Competition Business.  During the Term or any
          Extended Term and for two years after expiration of Term or any
          Extended Term (such two years being the "Post-Term Period")
          (regardless of whether Employee's employment ends at the end of the
          Term or any Extended Term or at some other point after the end of the
          Term or any Extended Term), Employee will not become involved with a
          Competing Business or serve, directly or indirectly, a Competing
          Business in any manner, including, without limitation, as a
          shareholder, member, partner, director, officer, manager, investor,
          organizer, "founder," employee, consultant, or agent; provided,
          however, that Employee may acquire and own an interest not to exceed
          2% of the total equity interest in any publicly held entity whose
          equity securities are listed on a national securities exchange
          (whether or not such entity is a Competing Business). Employee's
          noncompetition obligations for the Post-Term Period will not apply if
          (1) Employee's employment during the Term or any Extended Term is
          terminated without Cause, (2) Employee terminates his employment
          during the Term or any Extended Term for Good Reason, or (3) the Bank
          or its successor declines to employ Employee after expiration of the
          Term or any Extended Term.

     (b)  No Solicitation. During the Term, any Extended Term and the Post-Term
          Period (regardless of whether Employee's employment ends at the end of
          the Term or any Extended Term or at some other point after the end of
          the Term or any Extended Term) Employee will not directly or
          indirectly solicit or attempt to solicit (1) any employees located in
          Yakima County in Washington State (the "County") of the Bank,
          Heritage, or any of Heritage's Subsidiaries, to leave their employment
          or (2) and customers located in Yakima County of the Bank, Heritage,
          or any of Heritage's Subsidiaries to remove their business from the
          Bank, Heritage, or any of Heritage's Subsidiaries, or to participate
          in any manner in a Competing Business. Solicitation prohibited under
          this Section includes solicitation by any means, including, without
          limitation, meetings, letters or other mailings, electronic
          communications of any kind, and internet communications. Employee's
          nonsolicitation obligations for the Post-Term Period will not apply if
          (1) Employee's employment during the Term or any Extended Term is
          terminated without Cause, (2) Employee terminates his employment
          during the Term or any Extended Term for Good Reason, or (3) the Bank
          or its successor declines to employ Employee after expiration of the
          Term or any Extended Term.

     (c)  Employment Outside the County. Nothing in this Agreement prevents
          Employee from accepting employment after the end of the Term outside
          the County from a Competing Business, as long as Employee will not (a)
          act as an employee or other representative or agent of the Competing
          Business 

                                       4
<PAGE>
 
          within the County (b) have any responsibilities for the Competing
          Business' operations within the County.

     (d)  Competing Business.  "Competing Business" means any financial
          institution or trust company that competes with, or will compete in
          the County with, Heritage, the Bank, or any of Heritage's 
          Subsidiaries. The Term "Competing Business" includes, without
          limitation, any start-up or other financial institution or trust
          company in formation.

13.  ENFORCEMENT.

     (a)  The Bank and Employee stipulate that, in light of all of the facts and
          circumstances of the relationships between Employee and the Bank, the
          agreements referred to in Sections 11 and 12 (including without
          limitation their scope, duration and geographic extent) are fair and
          reasonably necessary for the protection of the Bank's and Heritage's
          confidential information, goodwill and other protectable interests. If
          a court of competent jurisdiction should decline to enforce any of
          those covenants and agreements, Employee and the Bank request the
          court to reform these provisions to restrict Employee's use of
          confidential information and Employee's ability to compete with the
          Bank and Heritage to the maximum extent, in time, scope of activities,
          and geography, the court finds enforceable.

     (b)  Employee acknowledges that the Bank and Heritage will suffer immediate
          and irreparable harm that will not be compensable by damages alone, if
          Employee repudiates or breaches any of the provisions of Sections 11
          or 12 or threatens or attempts to do so. For this reason, under these
          circumstances, the Bank and Heritage, in addition to and without
          limitation of any other rights, remedies or damages available to it at
          law or in equity, will be entitled to obtain temporary, preliminary,
          and permanent injunctions in order to prevent or restrain the breach,
          and neither the Bank nor Heritage will be required to post a bond as a
          condition for the granting of this relief.

14.  ADEQUATE CONSIDERATION.  Employee specifically acknowledges the receipt of
     adequate consideration for the covenants contained in Sections 11 and 12
     and that the Bank is entitled to require him to comply with these Sections.
     These Sections will survive termination of this Agreement. Employee
     represents that if his employment is terminated, whether voluntarily or
     involuntarily, Employee has experience and capabilities sufficient to
     enable Employee to obtain employment in areas which do not violate this
     Agreement and the Bank's enforcement of a remedy by way of injunction will
     not prevent Employee from earning a livelihood.

15.  ARBITRATION.

     (a)  Arbitration.  At either party's request, the parties must submit any
          dispute, controversy or claim arising out of or in connection with, or
          relating to, this Agreement or any breach or alleged breach of this
          Agreement, to arbitration under the American Arbitration Association's
          rules then in effect (or under any other form of arbitration mutually
          acceptable to the parties). A single arbitrator agreed on by the
          parties will conduct the arbitration. If the parties cannot agree on a
          single arbitrator, each party must select one arbitrator and those two
          arbitrators will select a third arbitrator. This third arbitrator will
          hear the dispute. The arbitrator's decision is final (except as
          otherwise specifically provided by law) and binds the parties, and
          either party may request any court having jurisdiction to enter a
          judgment and to enforce the arbitrator's decision. The arbitrator will
          provide the parties with a written decision naming the substantially
          prevailing party in the action. This prevailing party is entitled to
          reimbursement from the other party for its costs and expenses,
          including reasonable attorney's fees.

     (b)  Governing Law.  All proceedings will be held at a place designated by
          the arbitrator in Thurston County, Washington. The arbitrator, in
          rendering a decision as to any state law claims, will apply Washington
          law.

     (c)  Exception to Arbitration.  Notwithstanding the above, if Employee
          violates Sections 11 or 12, the Bank will have the right to initiate
          the court proceedings described in Section 13(b), in lieu of an

                                       5
<PAGE>
 
          arbitration proceeding under this Section 15. The Bank may initiate
          these proceeding wherever appropriate within Washington State; but
          Employee will consent to venue and jurisdiction in Thurston County,
          Washington.

16.  MISCELLANEOUS PROVISIONS.

     (a)  Defined Terms.  Capitalized terms used as defined terms, but not
          defined in this Agreement, will have the meanings assigned to those
          terms in the Plan.

     (b)  Entire Agreement.  This Agreement constitutes the entire understanding
          between the parties concerning its subject matter and supersedes all
          prior agreements. Accordingly, Employee specifically waives the terms
          of and all of his rights under all employment, change-in-control and
          salary continuation agreements, whether written or oral, he has
          entered into with the Bank or any of its Subsidiaries or affiliates.

     (c)  No Right to Continued Employment.  Nothing in this Agreement, express
          or implied, is intended to confer upon Employee the right to continued
          employment with the Bank after the Term.

     (d)  Binding Effect.  This Agreement will bind and inure to the benefit of
          the Bank's, Heritage's, and Employee's heirs, legal representatives,
          successors and assigns.

     (e)  Litigation Expenses.  If either party successfully seeks to enforce
          any provision of this Agreement or to collect any amount claimed to be
          due under it, this party will be entitled to reimbursement from the
          other party for any and all of its out-of-pocket expenses and costs
          including, without limitation, reasonable attorneys' fees and costs
          incurred in connection with the enforcement or collection.

     (f)  Waiver.  Any waiver by a party of its rights under this Agreement must
          be written and signed by the party waiving its rights. A party's
          waiver of the other party's breach of any provision of this Agreement
          will not operate as a waiver of any other breach by the breaching
          party.

     (g)  Counsel Review.  Employee acknowledges that he has had the opportunity
          to consult with independent counsel with respect to the negotiation,
          preparation, and execution of this Agreement.

     (h)  Assignment.  The services to be rendered by Employee under this
          Agreement are unique and personal. Accordingly, Employee may not
          assign any of his rights or duties under this Agreement.

     (i)  Amendment.  This Agreement may not be modified or amended except by a
          written instrument signed by both parties with the prior written
          consent of Heritage.

     (j)  Severability.  The provisions of this Agreement are severable. The
          invalidity of any provision will not affect the validity of other
          provisions of this Agreement.

     (k)  Governing Law and Venue.  This Agreement will be governed by and
          construed in accordance with Washington law, except to the extent that
          certain matters may be governed by federal law. Except as otherwise
          provided in Section 15(c), the parties must bring any legal proceeding
          arising out of this Agreement in Thurston County, Washington, and the
          parties will submit to jurisdiction in that county.

                                       6
<PAGE>
 
     (l)  Counterparts.  This Agreement may be executed in one or more facsimile
          counterparts, each of which will be deemed an original, but all of
          which taken together will constitute one and the same document.

Signed: September 28, 1998:        CENTRAL VALLEY BANK, N.A.

                                   ____________________________________
                                   By:   Donald V. Rhodes
                                   Its:  Chief Executive Officer


                                   DAVID J. PERRY, individually

                                   ____________________________________
                                   David J. Perry

                                       7
<PAGE>
 
                                   EXHIBIT F

                           CENTRAL VALLEY BANK, N.A.
                              EMPLOYMENT AGREEMENT


     THIS EMPLOYMENT AGREEMENT ("Agreement"), signed September 28, 1998, between
CENTRAL VALLEY BANK, N.A. (the "Bank") and LARRY HOLT ("Employee") takes effect
on the effective date of the Merger ("Effective Date").

                                    RECITALS
                                        
A.  Washington Independent Bancshares, Inc. which is the parent company of the
    Bank, intends to merge into Heritage Financial Corporation ("Heritage"), and
    the Bank will thereby become the wholly owned subsidiary of Heritage (the
    "Merger") under the terms of the Agreement and Plan of Merger dated as of
    September 28, 1998 ("Plan") between the parties.

B.  Employee is presently the Bank's Vice President. The Bank wishes to continue
    Employee's employment in that capacity under the terms and conditions of
    this Agreement.

C.  Under the terms of this Agreement, Employee wishes to continue his
    employment with the Bank (or its successor, if any) for the period provided
    in this Agreement.

                                   AGREEMENT
                                        
    The parties agree as follows.

1.  EMPLOYMENT.  The Bank will continue Employee's employment during the Term,
    and Employee accepts employment by the Bank, on the terms and conditions set
    forth in this Agreement. Employee's title will be "Vice President."

2.  EFFECTIVE DATE AND TERM.

    (a)  Term.  The term of this Agreement ("Term") commences on the Effective
         Date and terminates on December 31, 2000.

    (b)  Automatic Renewal. This Agreement shall renew automatically at the end
         of the Term for one additional year (an "Extended Term") and shall
         renew automatically at the end of the Extended Term for additional
         successive one year terms (each successive one year term also an
         "Extended Term") unless Employee gives the Bank or Bank gives the
         Employee written notice at least 90 days before the end of the Term or
         an Extended Term (as the case may be) of his or its intent that this
         Agreement not be renewed.

    (c)  Abandonment of the Merger.  If the Plan terminates before Closing, this
         Agreement will not become effective and will be void.

3.  DUTIES.  Employee will faithfully and diligently perform the duties assigned
    to Employee from time to time by the Bank's President or his designee as
    designated from time to time, consistent with the duties that have been
    normal and customary to Employee's position. Employee will use his best
    efforts to perform his duties and will devote his full time and attention to
    these duties during working hours. Employee will report directly to the
    Bank's President or his designee. The Bank's or Heritage's board of
    directors may, from time to time, modify Employee's title or performance
    responsibilities, subject to Section 10(b) of this Agreement, to accommodate
    management succession, as well as any other management objectives of the
    Bank or of Heritage subject to Section 10(b) of this Agreement. In the event
    that Heritage elects to merge the bank into Heritage Bank or some other
    affiliate of Heritage, then the title and duties of Employee with respect to
    the entity surviving such merger shall be determined by the President and
    CEO of Heritage or his designee. 
<PAGE>
 
    Employee will assume any additional positions, duties, and responsibilities
    as may reasonably be requested of him with or without additional
    compensation, as appropriate and consistent with this Section 3.

4.  SALARY.  Initially, Employee will receive a base salary of not less than
    $56,640 per year, to be paid in accordance with the Bank's regular payroll
    schedule for employees.

5.  INCENTIVE COMPENSATION.  The Bank's board of directors, subject to
    ratification by Heritage's board of directors, will determine the amount of
    bonus, if any, to be paid by the Bank to Employee for each year during the
    Initial Term. Employee will participate in any existing or subsequent
    management incentive plan of Heritage or Bank to the same extent as officers
    with similar responsibilities. Employee's bonus, if any, will reflect
    Employee's contribution to the performance of the Bank during the year.

6.  INCOME DEFERRAL AND BENEFITS.  Subject to eligibility requirements and in
    accordance with and subject to any policies adopted by the Bank's or
    Heritage's board of directors with respect to any benefit plans or programs,
    Employee will be entitled to receive benefits (including stock options)
    similar to those offered to other officers of Heritage and its subsidiaries
    with position and duties comparable to those of Employee. Neither the Bank
    nor Heritage through this Agreement obligates itself to make any particular
    benefits available to its employees or executive officers.

7.  BUSINESS EXPENSES.  The Bank will reimburse Employee for ordinary and
    necessary expenses (including, without limitation, travel, entertainment,
    and similar expenses) incurred in performing and promoting the Bank's
    business. Employee will present from time to time itemized accounts of these
    expenses, subject to any limits of Bank policy or the rules and regulations
    of the Internal Revenue Service.

8.  TERMINATION.

    (a)  Termination By Bank for Cause. If, before the end of the Term or any
         Extended Term, the Bank terminates Employee's employment for Cause or
         Employee terminates his employment without Good Reason, the Bank will
         pay Employee the salary earned and expenses reimbursable under this
         Agreement incurred through the date of Employee's termination. Employee
         will have no right to receive compensation or other benefits for any
         period after termination under this section 8(a), and Employee will be
         subject to the noncompetition and nonsolicitation requirements of
         Section 12 through the remainder of the Term or any Extended Term in
         which termination occurs and for the two-year period following the Term
         or any Extended Term in which termination occurs.

    (b)  Other Termination By Bank.  If before the end of the Term or any
         Extended Term, the Bank terminates Employee's employment without Cause
         or Employee terminates his employment for Good Reason (defined below),
         the Bank will pay Employee for the remainder of the Term or any
         Extended Term the salary Employee would have been entitled to under
         this Agreement if his employment had not terminated. If Employee is
         terminated pursuant to this Section 8(b), Employee will be subject to
         the noncompetition and nonsolicitation requirements of Section 12
         through the remainder of the Term or any Extended Term in which
         termination occurs only.

    (c)  Death or Disability.  This Agreement terminates (1) if Employee dies
         or (2) if Employee is unable to perform his duties and obligations
         under this Agreement for a period of 90 days as a result of a physical
         or mental disability arising at any time during the term of this
         Agreement (inability being "disabled"), unless with reasonable
         accommodation Employee could continue to perform his duties under this
         Agreement and making these accommodations would not require the Bank to
         expend any funds. The Bank or its successor's Board of Directors,
         acting in good faith, will make the final determination of whether
         Employee is Disabled, and for purposes of making such determination,
         may require Employee to submit to a physical examination by a physician
         mutually agreed upon by Employee and the Board of Directors. If
         termination occurs under this Section 8(c), Employee or his estate will
         be entitled to receive only the compensation and benefits earned and
         expenses reimbursable through the date of such termination.

                                       2
<PAGE>
 
    (d)  Termination Related to a Change in Control.
    
         (1)  Termination by Bank. If the Bank, or its successor in interest by
              merger, or its transferee in the event of a purchase and
              assumption transaction, for reasons other than Employee's death,
              disability, or Cause (1) terminates Employee's employment within
              one year following a Change in Control (as defined below) or (2)
              terminates Employee's employment before the Change in Control but
              on or after the date that any party either announces or is
              required by law to announce any prospective Change in Control
              transaction and a Change in Control occurs within twelve months
              after the termination, the Bank will pay Employee an amount equal
              to 12 months of Employee's base salary for the calendar year in
              which Employee's employment is terminated (the "Change in Control
              Payment").

         (2)  Termination by Employee. If Employee terminates Employee's
              employment, with or without Good Reason, within one year following
              a Change in Control, the Bank will pay employee the Change in
              Control Payment.

    (e)  Limitations on Payments Related to Change in Control.  Notwithstanding
         any other provision of this Agreement:

         (1)  the Change in Control Payment will be less than the amount that
              would cause it to be a "parachute payment" within the meaning of
              Section 280G(b)(2)(A) of the Internal Revenue Code of 1986, as
              amended (the "Internal Revenue Code");

         (2)  the Change in Control Payment will be reduced by any salary that
              Employee receives from the Bank or its successor after the Change
              in Control; and

         (3)  Employee's right to receive the Change in Control Payment
              terminates (i) immediately, if before the Change in Control
              transaction closes, Employee terminates his employment without
              Good Reason or the Bank terminates Employee's employment for
              Cause, or (ii) one year after a Change in Control occurs.

    (f)  Definition of "Change in Control".  "Change in Control" means a change
         "in the ownership or effective control" or "in the ownership of a
         substantial portion of the assets" of Heritage, within the meaning of
         Section 280G of the Internal Revenue Code.

    (g)  Return of Bank Property.  If and when Employee ceases, for any reason,
         to be employed by the Bank, Employee must return to the Bank all keys,
         pass cards, identification cards and any other property of the Bank or
         Heritage.  At the same time, Employee also must return to the Bank all
         originals and copies (whether in hard copy, electronic or other form)
         of any documents, drawings, notes, memoranda, designs, devices,
         diskettes, tapes, manuals, and specifications which constitute
         proprietary information or material of the Bank or Heritage.  The
         obligations in this paragraph include the return of documents and
         other materials which may be in Employee's desk at work, in Employee's
         car or place of residence, or in any other location under Employee's
         control.

9.  DEFINITION OF "CAUSE".  "Cause" means any one or more of the following:

    (a)  Willful misfeasance or gross negligence in the performance of
         Employee's duties;

    (b)  Conviction of a crime in connection with his duties;

    (c)  Conduct demonstrably and significantly harmful to the Bank, as
         reasonably determined by the Bank's or Heritage's board of directors on
         the advice of legal counsel of the Bank or Heritage; or

    (d)  Permanent disability, meaning a physical or mental impairment which
         renders Employee incapable of substantially performing the duties
         required under this Agreement, and which is expected to continue
         rendering Employee so incapable for the reasonably foreseeable future.

                                       3
<PAGE>
 
10.  DEFINITION OF "GOOD REASON".  "Good Reason" means only any one or more of
     the following:

     (a)  Reduction, without Employee's consent, of Employee's salary or
          elimination of any compensation or benefit plan benefiting Employee,
          unless the reduction or elimination is generally applicable to
          substantially all similarly situated Bank employees (or employees of a
          successor or controlling entity of the Bank) formerly benefited;

     (b)  The assignment to Employee without his consent of any authority or
          duties materially inconsistent with Employee's position as of the date
          of this Agreement; or

     (c)  A relocation or transfer of Employee's current business office that
          would require Employee to commute on a regular basis more than 60
          miles each way from his current business office at the Bank on the
          date of this Agreement, unless Employee consents to the relocation or
          transfer.

11.  CONFIDENTIALITY.  Employee will not, after signing this Agreement,
     including during and after its Term, use for his own purposes or disclose
     to any other person or entity and confidential information concerning the
     Bank or Heritage or their business operations or customers, unless (1) the
     Bank or Heritage consents to the use or disclosure of their respective
     confidential information, (2) the use or disclosure is consistent with
     Employee's duties under this Agreement, or (3) disclosure is required by
     law or court order.

12.  NONCOMPETITION.

     (a)  Participation in a Competition Business. During the Term or any
          Extended Term and for one year after expiration of Term or any
          Extended Term (such one year being the "Post-Term Period") (regardless
          of whether Employee's employment ends at the end of the Term or any
          Extended Term or at some other point after the end of the Term or any
          Extended Term), Employee will not become involved with a Competing
          Business or serve, directly or indirectly, a Competing Business in any
          manner, including, without limitation, as a shareholder, member,
          partner, director, officer, manager, investor, organizer, "founder,"
          employee, consultant, or agent; provided, however, that Employee may
          acquire and own an interest not to exceed 2% of the total equity
          interest in any publicly held entity whose equity securities are
          listed on a national securities exchange (whether or not such entity
          is a Competing Business). Employee's noncompetition obligations for
          the Post-Term Period will not apply if (1) Employee's employment
          during the Term or any Extended Term is terminated without Cause, (2)
          Employee terminates his employment during the Term or any Extended
          Term for Good Reason, or (3) the Bank or its successor declines to
          employ Employee after expiration of the Term or any Extended Term.

     (b)  No Solicitation. During the Term, any Extended Term and the Post-Term
          Period (regardless of whether Employee's employment ends at the end of
          the Term or any Extended Term or at some other point after the end of
          the Term or any Extended Term) Employee will not directly or
          indirectly solicit or attempt to solicit (1) any employees located in
          Yakima County in Washington State (the "County") of the Bank,
          Heritage, or any of Heritage's Subsidiaries, to leave their employment
          or (2) and customers located in Yakima County of the Bank, Heritage,
          or any of Heritage's Subsidiaries to remove their business from the
          Bank, Heritage, or any of Heritage's Subsidiaries, or to participate
          in any manner in a Competing Business. Solicitation prohibited under
          this Section includes solicitation by any means, including, without
          limitation, meetings, letters or other mailings, electronic
          communications of any kind, and internet communications. Employee's
          nonsolicitation obligations for the Post-Term Period will not apply if
          (1) Employee's employment during the Term or any Extended Term is
          terminated without Cause, (2) Employee terminates his employment
          during the Term or any Extended Term for Good Reason, or (3) the Bank
          or its successor declines to employ Employee after expiration of the
          Term or any Extended Term.

     (c)  Employment Outside the County. Nothing in this Agreement prevents
          Employee from accepting employment after the end of the Term outside
          the County from a Competing Business, as long as Employee will not (a)
          act as an employee or other representative or agent of the Competing
          Business 

                                       4
<PAGE>
 
          within the County (b) have any responsibilities for the Competing
          Business' operations within the County.

     (d)  Competing Business. "Competing Business" means any financial
          institution or trust company that competes with, or will compete in
          the County with, Heritage, the Bank, or any of Heritage's 
          Subsidiaries. The Term "Competing Business" includes, without
          limitation, any start-up or other financial institution or trust
          company in formation.

13.  ENFORCEMENT.

     (a)  The Bank and Employee stipulate that, in light of all of the facts and
          circumstances of the relationships between Employee and the Bank, the
          agreements referred to in Sections 11 and 12 (including without
          limitation their scope, duration and geographic extent) are fair and
          reasonably necessary for the protection of the Bank's and Heritage's
          confidential information, goodwill and other protectable interests. If
          a court of competent jurisdiction should decline to enforce any of
          those covenants and agreements, Employee and the Bank request the
          court to reform these provisions to restrict Employee's use of
          confidential information and Employee's ability to compete with the
          Bank and Heritage to the maximum extent, in time, scope of activities,
          and geography, the court finds enforceable.

     (b)  Employee acknowledges that the Bank and Heritage will suffer immediate
          and irreparable harm that will not be compensable by damages alone, if
          Employee repudiates or breaches any of the provisions of Sections 11
          or 12 or threatens or attempts to do so. For this reason, under these
          circumstances, the Bank and Heritage, in addition to and without
          limitation of any other rights, remedies or damages available to it at
          law or in equity, will be entitled to obtain temporary, preliminary,
          and permanent injunctions in order to prevent or restrain the breach,
          and neither the Bank nor Heritage will be required to post a bond as a
          condition for the granting of this relief.

14.  ADEQUATE CONSIDERATION.  Employee specifically acknowledges the receipt of
     adequate consideration for the covenants contained in Sections 11 and 12
     and that the Bank is entitled to require him to comply with these Sections.
     These Sections will survive termination of this Agreement. Employee
     represents that if his employment is terminated, whether voluntarily or
     involuntarily, Employee has experience and capabilities sufficient to
     enable Employee to obtain employment in areas which do not violate this
     Agreement and the Bank's enforcement of a remedy by way of injunction will
     not prevent Employee from earning a livelihood.

15.  ARBITRATION.

     (a)  Arbitration.  At either party's request, the parties must submit any
          dispute, controversy or claim arising out of or in connection with, or
          relating to, this Agreement or any breach or alleged breach of this
          Agreement, to arbitration under the American Arbitration Association's
          rules then in effect (or under any other form of arbitration mutually
          acceptable to the parties). A single arbitrator agreed on by the
          parties will conduct the arbitration. If the parties cannot agree on a
          single arbitrator, each party must select one arbitrator and those two
          arbitrators will select a third arbitrator. This third arbitrator will
          hear the dispute. The arbitrator's decision is final (except as
          otherwise specifically provided by law) and binds the parties, and
          either party may request any court having jurisdiction to enter a
          judgment and to enforce the arbitrator's decision. The arbitrator will
          provide the parties with a written decision naming the substantially
          prevailing party in the action. This prevailing party is entitled to
          reimbursement from the other party for its costs and expenses,
          including reasonable attorney's fees.

     (b)  Governing Law.  All proceedings will be held at a place designated by
          the arbitrator in Thurston County, Washington. The arbitrator, in
          rendering a decision as to any state law claims, will apply Washington
          law.

     (c)  Exception to Arbitration.  Notwithstanding the above, if Employee
          violates Sections 11 or 12, the Bank will have the right to initiate
          the court proceedings described in Section 13(b), in lieu of an

                                       5
<PAGE>
 
          arbitration proceeding under this Section 15. The Bank may initiate
          these proceeding wherever appropriate within Washington State; but
          Employee will consent to venue and jurisdiction in Thurston County,
          Washington.

16.  MISCELLANEOUS PROVISIONS.

     (a)  Defined Terms.  Capitalized terms used as defined terms, but not
          defined in this Agreement, will have the meanings assigned to those
          terms in the Plan.

     (b)  Entire Agreement.  This Agreement constitutes the entire understanding
          between the parties concerning its subject matter and supersedes all
          prior agreements. Accordingly, Employee specifically waives the terms
          of and all of his rights under all employment, change-in-control and
          salary continuation agreements, whether written or oral, he has
          entered into with the Bank or any of its Subsidiaries or affiliates.

     (c)  No Right to Continued Employment.  Nothing in this Agreement, express
          or implied, is intended to confer upon Employee the right to continued
          employment with the Bank after the Term.

     (d)  Binding Effect.  This Agreement will bind and inure to the benefit of
          the Bank's, Heritage's, and Employee's heirs, legal representatives,
          successors and assigns.

     (e)  Litigation Expenses.  If either party successfully seeks to enforce
          any provision of this Agreement or to collect any amount claimed to be
          due under it, this party will be entitled to reimbursement from the
          other party for any and all of its out-of-pocket expenses and costs
          including, without limitation, reasonable attorneys' fees and costs
          incurred in connection with the enforcement or collection.

     (f)  Waiver.  Any waiver by a party of its rights under this Agreement must
          be written and signed by the party waiving its rights. A party's
          waiver of the other party's breach of any provision of this Agreement
          will not operate as a waiver of any other breach by the breaching
          party.

     (g)  Counsel Review.  Employee acknowledges that he has had the opportunity
          to consult with independent counsel with respect to the negotiation,
          preparation, and execution of this Agreement.

     (h)  Assignment.  The services to be rendered by Employee under this
          Agreement are unique and personal. Accordingly, Employee may not
          assign any of his rights or duties under this Agreement.

     (i)  Amendment.  This Agreement may not be modified or amended except by a
          written instrument signed by both parties with the prior written
          consent of Heritage.

     (j)  Severability.  The provisions of this Agreement are severable. The
          invalidity of any provision will not affect the validity of other
          provisions of this Agreement.

     (k)  Governing Law and Venue.  This Agreement will be governed by and
          construed in accordance with Washington law, except to the extent that
          certain matters may be governed by federal law. Except as otherwise
          provided in Section 15(c), the parties must bring any legal proceeding
          arising out of this Agreement in Thurston County, Washington, and the
          parties will submit to jurisdiction in that county.

                                       6
<PAGE>
 
     (l)  Counterparts.  This Agreement may be executed in one or more facsimile
          counterparts, each of which will be deemed an original, but all of
          which taken together will constitute one and the same document.

Signed:  September 28, 1998:           CENTRAL VALLEY BANK, N.A.

                                       _______________________________
                                       By:   Donald V. Rhodes
                                       Its:  Chief Executive Officer


                                       LARRY HOLT , individually

                                       _______________________________
                                       Larry Holt

                                       7
<PAGE>
 
                                   EXHIBIT G

                           CENTRAL VALLEY BANK, N.A.
                             EMPLOYMENT AGREEMENT

     THIS EMPLOYMENT AGREEMENT ("Agreement"), signed September 28, 1998, between
CENTRAL VALLEY BANK, N.A. (the "Bank") and RICHARD MAISON ("Employee") takes
effect on the effective date of the Merger ("Effective Date").

                                   RECITALS
                                   --------
                                        
A.  Washington Independent Bancshares, Inc. which is the parent company of the
    Bank, intends to merge into Heritage Financial Corporation ("Heritage"), and
    the Bank will thereby become the wholly owned subsidiary of Heritage (the
    "Merger") under the terms of the Agreement and Plan of Merger dated as of
    September 28, 1998 ("Plan") between the parties.

B.  Employee is presently the Bank's Senior Vice President. The Bank wishes to
    continue Employee's employment in that capacity under the terms and
    conditions of this Agreement.

C.  Under the terms of this Agreement, Employee wishes to continue his
    employment with the Bank (or its successor, if any) for the period provided
    in this Agreement.

                                   AGREEMENT
                                   ---------
    The parties agree as follows.

1.  EMPLOYMENT.  The Bank will continue Employee's employment during the Term,
    and Employee accepts employment by the Bank, on the terms and conditions set
    forth in this Agreement. Employee's title will be "Senior Vice President."

2.  EFFECTIVE DATE AND TERM.

    (a)  Term.  The term of this Agreement ("Term") commences on the Effective
         Date and terminates on December 31, 2000.

    (b)  Automatic Renewal. This Agreement shall renew automatically at the end
         of the Term for one additional year (an "Extended Term") and shall
         renew automatically at the end of the Extended Term for additional
         successive one year terms (each successive one year term also an
         "Extended Term") unless Employee gives the Bank or Bank gives the
         Employee written notice at least 90 days before the end of the Term or
         an Extended Term (as the case may be) of his or its intent that this
         Agreement not be renewed.

    (c)  Abandonment of the Merger.  If the Plan terminates before Closing, this
         Agreement will not become effective and will be void.

3.  DUTIES.  Employee will faithfully and diligently perform the duties assigned
    to Employee from time to time by the Bank's President or his designee as
    designated from time to time, consistent with the duties that have been
    normal and customary to Employee's position. Employee will use his best
    efforts to perform his duties and will devote his full time and attention to
    these duties during working hours. Employee will report directly to the
    Bank's President or his designee. The Bank's or Heritage's board of
    directors may, from time to time, modify Employee's title or performance
    responsibilities, subject to Section 10(b) of this Agreement, to accommodate
    management succession, as well as any other management objectives of the
    Bank or of Heritage subject to Section 10(b) of this Agreement. In the event
    that Heritage elects to merge the bank into Heritage Bank or some other
    affiliate of Heritage, then the title and duties of Employee with respect to
    the entity surviving such merger shall be determined by the President and
    CEO of Heritage or his designee. 
<PAGE>
 
    Employee will assume any additional positions, duties, and responsibilities
    as may reasonably be requested of him with or without additional
    compensation, as appropriate and consistent with this Section 3.

4.  SALARY.  Initially, Employee will receive a base salary of not less than
    $77,040 per year, to be paid in accordance with the Bank's regular payroll
    schedule for employees.

5.  INCENTIVE COMPENSATION.  The Bank's board of directors, subject to
    ratification by Heritage's board of directors, will determine the amount of
    bonus, if any, to be paid by the Bank to Employee for each year during the
    Initial Term. Employee will participate in any existing or subsequent
    management incentive plan of Heritage or Bank to the same extent as officers
    with similar responsibilities. Employee's bonus, if any, will reflect
    Employee's contribution to the performance of the Bank during the year.

6.  INCOME DEFERRAL AND BENEFITS.  Subject to eligibility requirements and in
    accordance with and subject to any policies adopted by the Bank's or
    Heritage's board of directors with respect to any benefit plans or programs,
    Employee will be entitled to receive benefits (including stock options)
    similar to those offered to other officers of Heritage and its subsidiaries
    with position and duties comparable to those of Employee. Neither the Bank
    nor Heritage through this Agreement obligates itself to make any particular
    benefits available to its employees or executive officers.

7.  BUSINESS EXPENSES.  The Bank will reimburse Employee for ordinary and
    necessary expenses (including, without limitation, travel, entertainment,
    and similar expenses) incurred in performing and promoting the Bank's
    business. Employee will present from time to time itemized accounts of these
    expenses, subject to any limits of Bank policy or the rules and regulations
    of the Internal Revenue Service.

8.  TERMINATION.

    (a)  Termination By Bank for Cause.  If, before the end of the Term or any
         Extended Term, the Bank terminates Employee's employment for Cause or
         Employee terminates his employment without Good Reason, the Bank will
         pay Employee the salary earned and expenses reimbursable under this
         Agreement incurred through the date of Employee's termination. Employee
         will have no right to receive compensation or other benefits for any
         period after termination under this section 8(a), and Employee will be
         subject to the noncompetition and nonsolicitation requirements of
         Section 12 through the remainder of the Term or any Extended Term in
         which termination occurs and for the two-year period following the Term
         or any Extended Term in which termination occurs.

    (b)  Other Termination By Bank.  If before the end of the Term or any
         Extended Term, the Bank terminates Employee's employment without Cause
         or Employee terminates his employment for Good Reason (defined below),
         the Bank will pay Employee for the remainder of the Term or any
         Extended Term the salary Employee would have been entitled to under
         this Agreement if his employment had not terminated. If Employee is
         terminated pursuant to this Section 8(b), Employee will be subject to
         the noncompetition and nonsolicitation requirements of Section 12
         through the remainder of the Term or any Extended Term in which
         termination occurs only.

    (c)  Death or Disability.  This Agreement terminates (1) if Employee dies or
         (2) if Employee is unable to perform his duties and obligations under
         this Agreement for a period of 90 days as a result of a physical or
         mental disability arising at any time during the term of this Agreement
         (inability being "disabled"), unless with reasonable accommodation
         Employee could continue to perform his duties under this Agreement and
         making these accommodations would not require the Bank to expend any
         funds. The Bank or its successor's Board of Directors, acting in good
         faith, will make the final determination of whether Employee is
         Disabled, and for purposes of making such determination, may require
         Employee to submit to a physical examination by a physician mutually
         agreed upon by Employee and the Board of Directors. If termination
         occurs under this Section 8(c), Employee or his estate will be entitled
         to receive only the compensation and benefits earned and expenses
         reimbursable through the date of such termination.

                                       2
<PAGE>
 
    (d)  Termination Related to a Change in Control.

         (1)  Termination by Bank.  If the Bank, or its successor in interest by
              merger, or its transferee in the event of a purchase and
              assumption transaction, for reasons other than Employee's death,
              disability, or Cause (1) terminates Employee's employment within
              one year following a Change in Control (as defined below) or (2)
              terminates Employee's employment before the Change in Control but
              on or after the date that any party either announces or is
              required by law to announce any prospective Change in Control
              transaction and a Change in Control occurs within twelve months
              after the termination, the Bank will pay Employee an amount equal
              to 12 months of Employee's base salary for the calendar year in
              which Employee's employment is terminated (the "Change in Control
              Payment").

         (2)  Termination by Employee.  If Employee terminates Employee's
              employment, with or without Good Reason, within one year following
              a Change in Control, the Bank will pay employee the Change in
              Control Payment.

    (e)  Limitations on Payments Related to Change in Control.  Notwithstanding
         any other provision of this Agreement:

         (1)  the Change in Control Payment will be less than the amount that
              would cause it to be a "parachute payment" within the meaning of
              Section 280G(b)(2)(A) of the Internal Revenue Code of 1986, as
              amended (the "Internal Revenue Code");

         (2)  the Change in Control Payment will be reduced by any salary that
              Employee receives from the Bank or its successor after the Change
              in Control; and

         (3)  Employee's right to receive the Change in Control Payment
              terminates (i) immediately, if before the Change in Control
              transaction closes, Employee terminates his employment without
              Good Reason or the Bank terminates Employee's employment for
              Cause, or (ii) one year after a Change in Control occurs.

     (f)  Definition of "Change in Control".  "Change in Control" means a change
          "in the ownership or effective control" or "in the ownership of a
          substantial portion of the assets" of Heritage, within the meaning of
          Section 280G of the Internal Revenue Code.

     (g)  Return of Bank Property.  If and when Employee ceases, for any reason,
          to be employed by the Bank, Employee must return to the Bank all keys,
          pass cards, identification cards and any other property of the Bank or
          Heritage.  At the same time, Employee also must return to the Bank all
          originals and copies (whether in hard copy, electronic or other form)
          of any documents, drawings, notes, memoranda, designs, devices,
          diskettes, tapes, manuals, and specifications which constitute
          proprietary information or material of the Bank or Heritage.  The
          obligations in this paragraph include the return of documents and
          other materials which may be in Employee's desk at work, in Employee's
          car or place of residence, or in any other location under Employee's
          control.

9.  DEFINITION OF "CAUSE".  "Cause" means any one or more of the following:

    (a)  Willful misfeasance or gross negligence in the performance of
         Employee's duties;

    (b)  Conviction of a crime in connection with his duties;

    (c)  Conduct demonstrably and significantly harmful to the Bank, as
         reasonably determined by the Bank's or Heritage's board of directors on
         the advice of legal counsel of the Bank or Heritage; or

    (d)  Permanent disability, meaning a physical or mental impairment which
         renders Employee incapable of substantially performing the duties
         required under this Agreement, and which is expected to continue
         rendering Employee so incapable for the reasonably foreseeable future.

                                       3
<PAGE>
 
10.  DEFINITION OF "GOOD REASON".  "Good Reason" means only any one or more of
     the following:

     (a)  Reduction, without Employee's consent, of Employee's salary or
          elimination of any compensation or benefit plan benefiting Employee,
          unless the reduction or elimination is generally applicable to
          substantially all similarly situated Bank employees (or employees of a
          successor or controlling entity of the Bank) formerly benefited;

     (b)  The assignment to Employee without his consent of any authority or
          duties materially inconsistent with Employee's position as of the date
          of this Agreement; or

     (c)  A relocation or transfer of Employee's current business office that
          would require Employee to commute on a regular basis more than 60
          miles each way from his current business office at the Bank on the
          date of this Agreement, unless Employee consents to the relocation or
          transfer.

11.  CONFIDENTIALITY.  Employee will not, after signing this Agreement,
     including during and after its Term, use for his own purposes or disclose
     to any other person or entity and confidential information concerning the
     Bank or Heritage or their business operations or customers, unless (1) the
     Bank or Heritage consents to the use or disclosure of their respective
     confidential information, (2) the use or disclosure is consistent with
     Employee's duties under this Agreement, or (3) disclosure is required by
     law or court order.

12.  NONCOMPETITION.

     (a)  Participation in a Competition Business.  During the Term or any
          Extended Term and for one year after expiration of Term or any
          Extended Term (such one year being the "Post-Term Period") (regardless
          of whether Employee's employment ends at the end of the Term or any
          Extended Term or at some other point after the end of the Term or any
          Extended Term), Employee will not become involved with a Competing
          Business or serve, directly or indirectly, a Competing Business in any
          manner, including, without limitation, as a shareholder, member,
          partner, director, officer, manager, investor, organizer, "founder,"
          employee, consultant, or agent; provided, however, that Employee may
          acquire and own an interest not to exceed 2% of the total equity
          interest in any publicly held entity whose equity securities are
          listed on a national securities exchange (whether or not such entity
          is a Competing Business). Employee's noncompetition obligations for
          the Post-Term Period will not apply if (1) Employee's employment
          during the Term or any Extended Term is terminated without Cause, (2)
          Employee terminates his employment during the Term or any Extended
          Term for Good Reason, or (3) the Bank or its successor declines to
          employ Employee after expiration of the Term or any Extended Term.

     (b)  No Solicitation.  During the Term, any Extended Term and the Post-Term
          Period (regardless of whether Employee's employment ends at the end of
          the Term or any Extended Term or at some other point after the end of
          the Term or any Extended Term) Employee will not directly or
          indirectly solicit or attempt to solicit (1) any employees located in
          Yakima County in Washington State (the "County") of the Bank,
          Heritage, or any of Heritage's Subsidiaries, to leave their employment
          or (2) and customers located in Yakima County of the Bank, Heritage,
          or any of Heritage's Subsidiaries to remove their business from the
          Bank, Heritage, or any of Heritage's Subsidiaries, or to participate
          in any manner in a Competing Business. Solicitation prohibited under
          this Section includes solicitation by any means, including, without
          limitation, meetings, letters or other mailings, electronic
          communications of any kind, and internet communications. Employee's
          nonsolicitation obligations for the Post-Term Period will not apply if
          (1) Employee's employment during the Term or any Extended Term is
          terminated without Cause, (2) Employee terminates his employment
          during the Term or any Extended Term for Good Reason, or (3) the Bank
          or its successor declines to employ Employee after expiration of the
          Term or any Extended Term.

     (c)  Employment Outside the County.  Nothing in this Agreement prevents
          Employee from accepting employment after the end of the Term outside
          the County from a Competing Business, as long as Employee will not (a)
          act as an employee or other representative or agent of the Competing
          Business 

                                       4
<PAGE>
 
          within the County (b) have any responsibilities for the Competing
          Business' operations within the County.

     (d)  Competing Business.  "Competing Business" means any financial
          institution or trust company that competes with, or will compete in
          the County with, Heritage, the Bank, or any of Heritage's 
          Subsidiaries. The Term "Competing Business" includes, without
          limitation, any start-up or other financial institution or trust
          company in formation.

13.  ENFORCEMENT.

     (a)  The Bank and Employee stipulate that, in light of all of the facts and
          circumstances of the relationships between Employee and the Bank, the
          agreements referred to in Sections 11 and 12 (including without
          limitation their scope, duration and geographic extent) are fair and
          reasonably necessary for the protection of the Bank's and Heritage's
          confidential information, goodwill and other protectable interests. If
          a court of competent jurisdiction should decline to enforce any of
          those covenants and agreements, Employee and the Bank request the
          court to reform these provisions to restrict Employee's use of
          confidential information and Employee's ability to compete with the
          Bank and Heritage to the maximum extent, in time, scope of activities,
          and geography, the court finds enforceable.

     (b)  Employee acknowledges that the Bank and Heritage will suffer immediate
          and irreparable harm that will not be compensable by damages alone, if
          Employee repudiates or breaches any of the provisions of Sections 11
          or 12 or threatens or attempts to do so. For this reason, under these
          circumstances, the Bank and Heritage, in addition to and without
          limitation of any other rights, remedies or damages available to it at
          law or in equity, will be entitled to obtain temporary, preliminary,
          and permanent injunctions in order to prevent or restrain the breach,
          and neither the Bank nor Heritage will be required to post a bond as a
          condition for the granting of this relief.

14.  ADEQUATE CONSIDERATION.  Employee specifically acknowledges the receipt of
     adequate consideration for the covenants contained in Sections 11 and 12
     and that the Bank is entitled to require him to comply with these Sections.
     These Sections will survive termination of this Agreement. Employee
     represents that if his employment is terminated, whether voluntarily or
     involuntarily, Employee has experience and capabilities sufficient to
     enable Employee to obtain employment in areas which do not violate this
     Agreement and the Bank's enforcement of a remedy by way of injunction will
     not prevent Employee from earning a livelihood.

15.  ARBITRATION.

     (a)  Arbitration.  At either party's request, the parties must submit any
          dispute, controversy or claim arising out of or in connection with, or
          relating to, this Agreement or any breach or alleged breach of this
          Agreement, to arbitration under the American Arbitration Association's
          rules then in effect (or under any other form of arbitration mutually
          acceptable to the parties). A single arbitrator agreed on by the
          parties will conduct the arbitration. If the parties cannot agree on a
          single arbitrator, each party must select one arbitrator and those two
          arbitrators will select a third arbitrator. This third arbitrator will
          hear the dispute. The arbitrator's decision is final (except as
          otherwise specifically provided by law) and binds the parties, and
          either party may request any court having jurisdiction to enter a
          judgment and to enforce the arbitrator's decision. The arbitrator will
          provide the parties with a written decision naming the substantially
          prevailing party in the action. This prevailing party is entitled to
          reimbursement from the other party for its costs and expenses,
          including reasonable attorney's fees.

     (b)  Governing Law.  All proceedings will be held at a place designated by
          the arbitrator in Thurston County, Washington. The arbitrator, in
          rendering a decision as to any state law claims, will apply Washington
          law.

     (c)  Exception to Arbitration.  Notwithstanding the above, if Employee
          violates Sections 11 or 12, the Bank will have the right to initiate
          the court proceedings described in Section 13(b), in lieu of an

                                       5
<PAGE>
 
          arbitration proceeding under this Section 15. The Bank may initiate
          these proceeding wherever appropriate within Washington State; but
          Employee will consent to venue and jurisdiction in Thurston County,
          Washington.

16.  MISCELLANEOUS PROVISIONS.

     (a)  Defined Terms.  Capitalized terms used as defined terms, but not
          defined in this Agreement, will have the meanings assigned to those
          terms in the Plan.

     (b)  Entire Agreement.  This Agreement constitutes the entire understanding
          between the parties concerning its subject matter and supersedes all
          prior agreements. Accordingly, Employee specifically waives the terms
          of and all of his rights under all employment, change-in-control and
          salary continuation agreements, whether written or oral, he has
          entered into with the Bank or any of its Subsidiaries or affiliates.

     (c)  No Right to Continued Employment.  Nothing in this Agreement, express
          or implied, is intended to confer upon Employee the right to continued
          employment with the Bank after the Term.

     (d)  Binding Effect.  This Agreement will bind and inure to the benefit of
          the Bank's, Heritage's, and Employee's heirs, legal representatives,
          successors and assigns.

     (e)  Litigation Expenses.  If either party successfully seeks to enforce
          any provision of this Agreement or to collect any amount claimed to be
          due under it, this party will be entitled to reimbursement from the
          other party for any and all of its out-of-pocket expenses and costs
          including, without limitation, reasonable attorneys' fees and costs
          incurred in connection with the enforcement or collection.

     (f)  Waiver.  Any waiver by a party of its rights under this Agreement must
          be written and signed by the party waiving its rights. A party's
          waiver of the other party's breach of any provision of this Agreement
          will not operate as a waiver of any other breach by the breaching
          party.

     (g)  Counsel Review.  Employee acknowledges that he has had the opportunity
          to consult with independent counsel with respect to the negotiation,
          preparation, and execution of this Agreement.

     (h)  Assignment.  The services to be rendered by Employee under this
          Agreement are unique and personal. Accordingly, Employee may not
          assign any of his rights or duties under this Agreement.

     (i)  Amendment.  This Agreement may not be modified or amended except by a
          written instrument signed by both parties with the prior written
          consent of Heritage.

     (j)  Severability.  The provisions of this Agreement are severable.  The
          invalidity of any provision will not affect the validity of other
          provisions of this Agreement.

     (k)  Governing Law and Venue.  This Agreement will be governed by and
          construed in accordance with Washington law, except to the extent that
          certain matters may be governed by federal law. Except as otherwise
          provided in Section 15(c), the parties must bring any legal proceeding
          arising out of this Agreement in Thurston County, Washington, and the
          parties will submit to jurisdiction in that county.

                                       6
<PAGE>
 
     (l)  Counterparts.  This Agreement may be executed in one or more facsimile
          counterparts, each of which will be deemed an original, but all of
          which taken together will constitute one and the same document.

Signed:  September 28, 1998:           CENTRAL VALLEY BANK, N.A.

                                       _________________________________________
                                       By:  Donald V. Rhodes
                                       Its:  Chief Executive Officer


                                       RICHARD MAISON, individually

                                       _________________________________________
                                       Richard Maison

                                       7
<PAGE>
 
                                   EXHIBIT H


___________, 1998



Heritage Financial Corporation
201 5th Avenue SW
Olympia, WA  98501

Re:  Agreement and Plan of Merger

Ladies and Gentlemen:

We have acted as counsel for Washington Independent Bancshares, Inc. (the
"Company"), a corporation organized under the laws of the State of Washington,
and Central Valley Bank, N.A. (the "Bank"), a national banking association
organized under the laws of the United States of America, in connection with the
merger of Company with Heritage Financial Corporation ("Heritage"), pursuant to
an Agreement and Plan of Merger dated September 28, 1998 (the "Plan").  This
opinion letter is rendered pursuant to Section 6.2(A) of the Plan.  Capitalized
terms used but not defined in this opinion letter have the meanings assigned to
such terms in the Plan.

This opinion letter is governed by, and must be interpreted in accordance with,
the Legal Opinion Accord (the "Accord") of the ABA Section of Business Law
(1991).  As a result, this opinion letter is subject to a number of
qualifications, exceptions, definitions, limitations on coverage and other
limitations, all as more particularly described in the Accord, and this opinion
letter should be read in conjunction with the Accord.  The law covered by the
opinions expressed in this letter is limited to the Federal Law of the United
States and the laws of the State of Washington.  We express no opinion with
respect to the effect of the laws of any other jurisdiction.

In conducting our examination, we have assumed, without investigation, the
genuineness of all signatures, the legal capacity of natural persons, the
correctness of all certificates, the authenticity of all documents and
instruments submitted to us as originals, the conformity to original documents
and instruments of all such documents and instruments submitted to us as
certified or photostatic or facsimile copies and the authenticity of the
originals of such copies, and the accuracy and completeness of all records made
available to us by the Company and the Bank.  In conducting our examination of
these documents and instruments, we also have assumed, without investigation,
that each party to such documents and instruments (other than the Company and
the Bank) has (a) the power and capacity to enter into and perform all of its
obligations under such documents and instruments; (b) duly authorized all
requisite actions with respect to such documents and instruments; and (c) duly
executed and delivered such documents and instruments.

We have assumed, without investigation, the accuracy of all statements,
representations, and warranties as to factual matters, written or oral, made by
officers and employees of, and accountants for, the Bank and by public
officials.  We also assume that the Plan is binding upon and enforceable in
accordance with its terms and against Heritage.
<PAGE>
 
Heritage Financial Corporation
___________________, 1998
Page 2
 
In rendering the opinions expressed in this letter, we have examined and relied
upon such records, documents, instruments, certificates of public officials and
certificates of officers and employees of and accountants for the Company and
the Bank as we have deemed appropriate, including:

1.  A certificate of existence or authorization dated ________, 1998 issued by
    the Washington Secretary of State ("Company Certificate of Good Standing")
    with respect to the Company and a certificate of existence dated ________,
    1998 issued by the Comptroller of the Currency ("Bank Certificate of Good
    Standing") with respect to the Bank.

2.  The Company's Articles of Incorporation, as amended, certified by the
    Washington Secretary of State as of __________, 1998 and the Bank's Articles
    of Association, as amended, certified by the Comptroller of the Currency as
    of _________, 1998;

3.  The Company's Bylaws, as amended, certified by the Secretary of the Company
    and the Bank's Bylaws, as amended, certified by the Cashier of the Bank;

4.  Resolutions of the Bank's and the Company's respective Board of Directors,
    authorizing actions relating to the transactions contemplated by the Plan;
    and

5.  The Plan.

The opinions expressed in this letter are subject to the following
qualifications:

1.  Our opinion regarding the Company's and the Bank's respective status as
    organizations validly existing and in good standing under Washington and
    Federal law, respectively, is based solely upon the Company Certificate of
    Good Standing and Bank Certificate of Good Standing.

2.  Our opinion regarding the enforceability of the Plan may be limited by
    bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium,
    or similar laws generally affecting the enforcement of the rights of
    creditors and by generally applicable principles of equity.

3.  A Washington court, or federal court applying Washington law, may consider
    extrinsic evidence of the circumstances surrounding the making of the Plan
    to ascertain the intent of the parties using the language employed in the
    Plan, regardless of whether or not the language used is plain and
    unambiguous on its face, and may incorporate additional or supplementary
    terms into the Plan.

4.  As used in this opinion letter, the expression "to our actual knowledge"
    means the conscious awareness of facts or other information by the lawyers
    in our office actively representing the Company or the Bank in connection
    with the transactions contemplated by the Plan. We have not undertaken any
    independent investigation or review of our files nor canvassed all the
    lawyers in our office. Except as otherwise set forth in this opinion letter,
    we have not reviewed any agreements, orders, writs, judgments or decrees or
    made any inquiry of the Company or the Bank.

We express no opinion as to:  (i) any anti-trust or tax laws; (ii) provisions
relating to venue, jurisdiction, governing law, waiver of remedies (or the delay
or omission of enforcement of such provisions), or disclaimers or liability
limitations with respect to third parties; (iii) provisions for payment or
reimbursement of costs and expenses (including, without limitation, attorney
fees) in excess of statutory limits or amounts determined to be reasonable by
any court or other tribunal; and (iv) severability and indemnification
provisions.
<PAGE>
 
Heritage Financial Corporation
___________________, 1998
Page 3
 
Based upon the foregoing and subject to the qualifications, limitations and
assumptions set forth in this opinion letter, we are of the opinion that:

1.  The Company is a corporation validly existing and in good standing under the
    laws of the State of Washington. The Bank is a national banking association
    validly existing and in good standing under the laws of the United States of
    America.

2.  The Company and the Bank have the corporate power and authority to execute,
    deliver and perform the Plan.

3.  The execution, delivery and performance of the Plan have been duly
    authorized by all necessary corporate action on the part of the Company and
    the Bank, and the Plan constitutes the Company's and the Bank's legal,
    binding and valid obligation, enforceable and in accordance with its terms.

4.  Execution of the Plan and consummation of the transactions contemplated by
    the Plan will not violate the Company's or the Bank's respective Articles of
    Incorporation/Association or Bylaws nor, to our actual knowledge, breach or
    result in a default under an existing obligation of the Company or the Bank
    under any material contract to which the Company or the Bank is a party.

5.  All issued and outstanding shares of the Company's and the Bank's capital
    stock have been duly authorized and are validly issued, fully paid, non-
    assessable (except for the application of 12 U.S.C. (S)55 to shares of Bank
    Common Stock), and are free of preemptive rights except those created by the
    respective Articles of Incorporation/Association of the Company or the Bank
    or by contract.

6.  All of the Company Options have been duly authorized and validly granted.

7.  To our actual knowledge, there are no pending or threatened claims, actions,
    suits or legal or equitable proceedings before any court or governmental
    agency which, in our opinion would be, individually or in the aggregate,
    reasonably likely to result in liability in excess of $25,000 or prevent
    consummation of the transactions contemplated by the Plan.

8.  To our actual knowledge, no information about Company or the Bank in the
    Registration Statement contained any untrue statement of a material fact or
    omitted to state a material fact required to be stated therein or necessary
    to make the statements contained therein not misleading.

The foregoing is rendered solely for your benefit in connection with the above-
described transaction. You may not, without our prior express written approval,
deliver copies of this letter or extracts therefrom to any other person, and no
one other than you is entitled to rely upon the foregoing.

Sincerely,

GORDON, THOMAS, HONEYWELL, MALANCA, PETERSON & DAHEIM, P.L.L.C.
<PAGE>
 
                                   EXHIBIT I



___________, 1998



Washington Independent Bancshares
537 West Second
Toppenish, WA  98948

Re:  Agreement and Plan of Merger

Ladies and Gentlemen:

We have acted as counsel for Heritage Financial Corporation ("Heritage"), a
corporation organized under the laws of the State of Washington, in connection
with the merger of Heritage with Washington Independent Bancshares, Inc. (the
"Company"), a corporation organized under the laws of the State of Washington,
and Central Valley Bank, N.A. (the "Bank"), a national banking association
organized under the laws of the United States of America, pursuant to an
Agreement and Plan of Merger dated September 28, 1998 (the "Plan"). This
opinion letter is rendered pursuant to Section 6.3(A) of the Plan. Capitalized
terms used but not defined in this opinion letter have the meanings assigned to
such terms in the Plan.

This opinion letter is governed by, and must be interpreted in accordance with,
the Legal Opinion Accord (the "Accord") of the ABA Section of Business Law
(1991).  As a result, this opinion letter is subject to a number of
qualifications, exceptions, definitions, limitations on coverage and other
limitations, all as more particularly described in the Accord, and this opinion
letter should be read in conjunction with the Accord. The law covered by the
opinions expressed in this letter is limited to the Federal Law of the United
States and the laws of the State of Washington. We express no opinion with
respect to the effect of the laws of any other jurisdiction.

In conducting our examination, we have assumed, without investigation, the
genuineness of all signatures, the legal capacity of natural persons, the
correctness of all certificates, the authenticity of all documents and
instruments submitted to us as originals, the conformity to original documents
and instruments of all such documents and instruments submitted to us as
certified or photostatic or facsimile copies and the authenticity of the
originals of such copies, and the accuracy and completeness of all records made
available to us by Heritage. In conducting our examination of these documents
and instruments, we also have assumed, without investigation, that each party to
such documents and instruments (other than Heritage ) has (a) the power and
capacity to enter into and perform all of its obligations under such documents
and instruments; (b) duly authorized all requisite actions with respect to such
documents and instruments; and (c) duly executed and delivered such documents
and instruments.

We have assumed, without investigation, the accuracy of all statements,
representations, and warranties as to factual matters, written or oral, made by
officers and employees of, and accountants for, Heritage and by public
officials. We also assume that the Plan is binding upon and enforceable in
accordance with its terms and against the Company and the Bank.
<PAGE>
 
Washington Independent Bancshares
____________________, 1998
Page 2
 
In rendering the opinions expressed in this letter, we have examined and relied
upon such records, documents, instruments, certificates of public officials and
certificates of officers and employees of and accountants for Heritage as we
have deemed appropriate, including:

1.  A certificate of existence or authorization dated ________, 1998 issued by
    the Washington Secretary of State ("Certificate of Good Standing");

2.  Heritage's Articles of Incorporation, as amended, certified by the
    Washington Secretary of State as of __________, 1998;

3.  Heritage's Bylaws, as amended, certified by the Secretary of Heritage;

4.  Resolutions of Heritage's Board of Directors, authorizing actions relating
    to the transactions contemplated by the Plan; and

5.  The Plan.

The opinions expressed in this letter are subject to the following
qualifications:

1.  Our opinion regarding Heritage's status as a corporation validly existing
    and in good standing under Washington law is based solely upon the
    Certificate of Good Standing.

2.  Our opinion regarding the enforceability of the Plan may be limited by
    bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium,
    or similar laws generally affecting the enforcement of the rights of
    creditors and by generally applicable principles of equity.

3.  A Washington court, or federal court applying Washington law, may consider
    extrinsic evidence of the circumstances surrounding the making of the Plan
    to ascertain the intent of the parties using the language employed in the
    Plan, regardless of whether or not the language used is plain and
    unambiguous on its face, and may incorporate additional or supplementary
    terms into the Plan.

4.  As used in this opinion letter, the expression "to our actual knowledge"
    means the conscious awareness of facts or other information by the lawyers
    in our office actively representing Heritage in connection with the
    transactions contemplated by the Plan. We have not undertaken any
    independent investigation or review of our files nor canvassed all the
    lawyers in our office. Except as otherwise set forth in this opinion letter,
    we have not reviewed any agreements, orders, writs, judgments or decrees or
    made any inquiry of Heritage

We express no opinion as to:  (i) any anti-trust or tax laws; (ii) provisions
relating to venue, jurisdiction, governing law, waiver of remedies (or the delay
or omission of enforcement of such provisions), or disclaimers or liability
limitations with respect to third parties; (iii) provisions for payment or
reimbursement of costs and expenses (including, without limitation, attorney
fees) in excess of statutory limits or amounts determined to be reasonable by
any court or other tribunal; and (iv) severability and indemnification
provisions.

Based upon the foregoing and subject to the qualifications, limitations and
assumptions set forth in this opinion letter, we are of the opinion that:

1.  Heritage is a corporation validly existing and in good standing under the
    laws of the State of Washington.

2.  Heritage has the corporate power and authority to execute, deliver and
    perform its obligations under the Plan.
<PAGE>
 
Washington Independent Bancshares
____________________, 1998
Page 3
 
3.  The execution, delivery and performance of the Plan have been duly
    authorized by all necessary corporate action on the part of Heritage.

4.  The execution of the Plan and consummation of the transactions contemplated
    by the Plan will not violate Heritage's Articles of Incorporation or Bylaws
    nor, to our actual knowledge, breach or result in a default under an
    existing obligation of Heritage under any material contract to which
    Heritage is a party.

5.  The Plan constitutes the legal, valid and binding obligation of Heritage
    enforceable against Heritage in accordance with its terms.

6.  The shares to be issued in connection with the Plan have been duly
    authorized and, when issued as contemplated by the Plan, will be validly
    issued, fully paid and nonassessable, and are free of preemptive rights
    except those created by the Articles of Incorporation of Heritage or by
    contract.

7.  The Registration Statement became effective under the Securities Act on
    _________, 1998, and to our actual knowledge: (a) no stop order suspending
    the effectiveness of the Registration Statement has been issued and no
    proceedings for that purpose have been instituted or threatened by the
    Securities and Exchange Commission and (b) with respect to information
    contained in the Registration Statement regarding Heritage, such information
    did not contain any untrue statement of a material fact or omit to state a
    material fact required to be stated therein or necessary to make the
    statements contained therein not misleading.

8.  To our actual knowledge, there are no pending or threatened claims, actions,
    suits or legal or equitable proceedings before any court or governmental
    agency which, in our opinion would be, individually or in the aggregate,
    reasonably likely to result in liability in excess of $25,000 or prevent
    consummation of the transactions contemplated by the Plan.

The foregoing is rendered solely for your benefit in connection with the above-
described transaction. You may not, without our prior express written approval,
deliver copies of this letter or extracts therefrom to any other person, and no
one other than you is entitled to rely upon the foregoing.

Sincerely,

GERRISH & McCREARY, P.C.

<PAGE>
 
                                                                      EXHIBIT 99

FOR IMMEDIATE RELEASE
FOR FURTHER INFORMATION CONTACT:             DONALD V. RHODES
                                             CHAIRMAN, PRESIDENT AND CEO
                                             360/943-1500

                      HERITAGE FINANCIAL CORPORATION AND
                    WASHINGTON INDEPENDENT BANCSHARES, INC.
                             ANNOUNCE AFFILIATION
                                        
Olympia, Washington September 28, 1998 Heritage Financial Corp. and Washington
Independent Bancshares, Inc. today announced the signing of a definitive
agreement to affiliate with each other through a merger. The agreement has been
approved by the Boards of Directors of both companies and is subject to approval
of shareholders of both companies and appropriate regulatory agencies.

Upon completion, Washington Independent Bancshares's bank subsidiary, Central
Valley Bank, N.A., which has five locations in Yakima County in central
Washington will become part of the expanding Heritage Financial banking family
and will operate as a separate subsidiary of Heritage Financial with its own
Board and management.  Heritage Financial recently announced a merger agreement
with Harbor Bancorp, parent company of The Bank of Grays Harbor which operates
five banking offices in Grays Harbor County.  The proposed transactions with
Harbor Bancorp and Washington Independent Bancshares will bring Heritage
Financial's asset size to over $580 million and expand its banking network to 22
offices in the state of Washington.  Heritage Financial expects to complete both
transactions during the first quarter of 1999.

The proposed transaction with Washington Independent Bancshares is expected to
be accounted for as a pooling of interests. The definitive agreement calls for
Heritage to issue a total of 1.0 million shares of its common stock for all
outstanding shares of Washington Independent Bancshares common stock, plus up to
an additional 50,000 shares, depending on Heritage's average stock price shortly
before the transaction closes. The transaction is expected to have a positive
impact on Heritage Financial's earnings beginning in 1999.

Donald V. Rhodes, Chairman, President and Chief Executive Officer of Heritage
Financial, has a long-standing relationship at Washington Independent
Bancshares, where he also serves as Chairman, President, and Chief Executive
Officer of Washington 
<PAGE>
 
Independent Bancshares and Chairman and Chief Executive officer of Central
Valley Bank. Rhodes stated "The affiliation with Washington Independent
Bancshares adds strength to Heritage Financial's growing franchise. Washington
Independent Bancshares's offices in Yakima County help us accomplish our goal of
growth through acquisition of well managed, profitable commercial banks in good
markets. Their style of community banking fits well with ours. They bring a
shared commitment to superior customer service."

Michael Broadhead, President of Central Valley Bank, N.A., said, "The
affiliation with Heritage Financial will enhance our ability to provide our
customers with a wider variety of products and services, including the ability
to expand our branch network and lending capacity in Yakima County and in other
nearby markets. We look forward to continuing the partnership that has existed
between management of the institutions over the past decade." Mr. Broadhead will
remain as president of Central Valley Bank, N.A. and will be in charge of
operations in central Washington.

Customers of Central Valley Bank, N.A. will continue to be served by the same
employees who have helped them in the past and will not need to make any changes
to their banking routine.

Heritage Financial Corporation, with assets of approximately $404 million, is
the parent of Heritage Savings Bank, Olympia, Washington, which operates ten
banking offices in the South Puget Sound area of Washington and North Pacific
Bank, Tacoma, Washington, which operates two offices in Tacoma. Washington
Independent Bancshares, Inc. has assets in excess of $57 million.

Heritage Financial Corp.'s common stock trades on The Nasdaq Stock Market
under the symbol "HFWA."

Safe Harbor Statement Under The Private Securities Litigation Reform Act Of
1995:  Statements in this news release looking forward in time involve risks and
uncertainties, including regulatory approvals, completion of the due diligence
process, success of acquiring new locations and integrating newly-acquired
branches, additional expansion opportunities, the effect of changing economic
conditions, product demand, changes in the regulatory environment, and other
risk factors detailed in Heritage Financial's Securities and Exchange Commission
Filings.


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