Document:

<PAGE>
                                                                  Exhibit 10.198

                 INSTALLMENT SALE CONTRACT (SECURITY AGREEMENT)

PURCHASER(S):                           SELLER (DEALER):
MEADOW VALLEY CONTRACTORS, INC.         RUST TRACTOR CO.
4411 S. 40TH ST                         4000 OSUNA ROAD N.E.
PHOENIX, AZ 85040                       P.O. BOX 25007
                                        ALBUQUERQUE, NM 87125-0007

County: MARICOPA
--------------------------------------------------------------------------------
Subject to the terms and conditions set forth below and on the reverse side
hereof, Seller hereby sells the equipment described below (the "Unit" or
"Units") to Purchaser, and Purchaser (if more than one, jointly and severally),
having been offered both a cash sale price and a time sale price, hereby buys
the Units from Seller on a time sale basis.
--------------------------------------------------------------------------------
NEW  (IF USED)                                                         DELIVERED
OR   FIRST    MODEL      DESCRIPTION OF UNIT(S)        SERIAL#         CASH SALE
USED USED                                                                  PRICE
--------------------------------------------------------------------------------

(1) Used      980G       Caterpillar Wheel Loader      2KR03371      $243,000.00

FIRST     DESCRIPTION OF ADDITIONAL SECURITY
USED      (MAKE, MODEL & SERIAL NUMBER)

FIRST     DESCRIPTION OF TRADE-IN EQUIPMENT
USED      (MAKE, MODEL & SERIAL NUMBER)

CATERPILLAR 927G 7LS00253

<Table>
<S>                                      <C>
Trade-in Value                           120,000.00
Less Owing to CATERPILLAR FINANCIAL       66,117.59
Net Trade-in Allowance                    53,882.41
</Table>

Location of Units:  4411 S. 40th Street (Home office)
                    Phoenix, AZ  85040
                    Maricopa

Unit may be used at various construction sites in the States of Arizona, Utah
and Nevada.

<Table>
<C>  <S>                                     <C>
     Sub-Total ..............................  $243,000.00
     Sales Tax ..............................  $  4,019.49
1.   Total Cash Sale Price ..................  $247,019.49
     Cash Down Pay                 44,800.00
     Net Trade-in Allow            53,882.41
2.   Total Down Payment .....................  $ 98,682.41
3.   Unpaid Balance of Cash Price (1-2) .....  $148,337.08
4.   Official Fees (Specify) ................  $    250.00
     Document Fee                  250.00
     Other Fees                      0.00
5.   Physical Damage Insurance ..............  $
6.   Principal Balance
     (Amount Financed)(3 + 4 + 5) ...........  $148,587.08
7.   FINANCE CHARGE
     (Time Price Differential) ..............  $  9,340.60
8.   Time Balance
     (Total of Payments)(6 + 7) .............  $157,927.68
9.   Time Sale Balance
     (Total of Payment Price)(2 + 8) ........  $256,610.09
10.  ANNUAL PERCENTAGE RATE                           4.00%
11.  Date FINANCE CHARGE begins to accrue       9/30/02
</Table>

PURCHASER HEREBY SELLS AND CONVEYS TO SELLER THE ABOVE DESCRIBED TRADE-IN
EQUIPMENT AND WARRANTS IT TO BE FREE AND CLEAR OF ALL CLAIMS, LIENS, SECURITY
INTERESTS AND ENCUMBRANCES EXCEPT TO THE EXTENT SHOWN ABOVE.

    1. PAYMENT:  Purchaser shall pay to Seller, at ____________ or such other
location Seller designates in writing, the Time Balance (Item 8 above) as
follows [check (a) or (b)]:

_X_ (a) in 36 equal MONTHLY installments of $4,386.88 each, with the first
installment due on 9/30th/02, and the balance of the installments due on the
like day of each MONTH thereafter, (except no payments shall be due during the
months(s) of N/A), until the entire indebtedness has been paid; or

___ (b) in accordance with the Payment Schedule attached to this Contract.

(Provisions of section 1 continued on reverse.)

SEE REVERSE SIDE FOR ADDITIONAL TERMS AND CONDITIONS WHICH ARE A PART OF THIS
CONTRACT.

LIABILITY INSURANCE COVERAGE FOR BODILY INJURY AND PROPERTY DAMAGE CAUSED TO
OTHERS IS NOT INCLUDED IN THIS CONTRACT.

NOTICE TO PURCHASER: (1) DO NOT SIGN THIS CONTRACT BEFORE YOU READ IT OR IF IT
CONTAINS ANY BLANK SPACES; (2) YOU ARE ENTITLED TO AN EXACT COPY OF THE
CONTRACT YOU SIGN; (3) UNDER THE LAW YOU MAY HAVE THE RIGHT TO PAY OFF IN
ADVANCE THE FULL AMOUNT DUE AND TO OBTAIN A PARTIAL REFUND OF THE FINANCE
CHARGE.

PURCHASER ACKNOWLEDGES RECEIPT OF A FULLY COMPLETED COPY OF THIS CONTRACT
EXECUTED BY BOTH PURCHASER AND SELLER.

Purchaser(s) and Seller have duly executed this Contract as of 8-30, 2002.

Purchaser(s):                           Seller:
MEADOW VALLEY CONTRACTORS, INC.         RUST TRACTOR CO.

By   /s/  Kenneth D. Nelson            By  /s/  G. Cody Eldridge
----------------------------------      ----------------------------------------

Name (PRINT)  Kenneth D. Nelson         Name (PRINT)   G. Cody Eldridge
----------------------------------      ----------------------------------------

Title  Vice President                   Title          VP
----------------------------------      ----------------------------------------

<PAGE>
                        ADDITIONAL TERMS AND CONDITIONS

1. PAYMENT (CONTINUED): Purchaser shall pay to Seller a late payment charge
equal to the lesser of (a) the highest charge allowed by law or (b) 5% of the
amount of any payment (including any accelerated payment) not made when due
under this Contract (or such later date as may be required by applicable law).
Upon prepayment in full or acceleration of the total unpaid Time Balance,
Purchaser shall receive a rebate of the unearned portion of the Finance Charge
computed on an actuarial basis less a processing fee. Except as otherwise
expressly provided herein, the obligations of Purchaser hereunder shall not be
affected by any defect in, damage to, loss of or interference with possession
or use of any Unit, by the attachment of any lien or claim to any Unit, or for
any other cause.

2. DISCLAIMER OF WARRANTIES: Purchaser acknowledges and agrees that Seller is
not the manufacturer of the Units(s) and that Purchaser has selected each Unit
based on Purchaser's own judgment without any reliance whatsoever on any
statements or representations made by Seller. AS BETWEEN SELLER AND PURCHASER,
THE UNIT(S) ARE PROVIDED "AS IS" WITHOUT ANY WARRANTIES OF ANY KIND. PURCHASER
HEREBY EXPRESSLY DISCLAIMS a) ALL WARRANTIES OF MERCHANTABILITY, b) ALL
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, AND c) ALL WARRANTIES AGAINST
INFRINGEMENT OR THE LIKE. Seller assigns to Purchaser its interest in any of
the manufacturer's warranties on the Unit(s).

3. POSSESSION, USE AND MAINTENANCE: Purchaser shall not (a) use any Unit
improperly, carelessly, unsafely or in violation of any law or regulation or for
personal, family, or household purposes or for any purpose other than in
Purchaser's business (including agricultural business); (b) permit the use of
any Unit by anyone other than Purchaser or change the permanent location of any
Unit from the county and state specified above without the prior written consent
of Seller; or (c) sell, lease, assign or transfer, or create or suffer to exist
any lien, claim, security interest or encumbrance on any of its rights hereunder
or in any Unit. The Units are and shall remain personal property irrespective of
their use or manner of attachment to realty. Upon prior notice to Purchaser,
Seller or its agent shall have the right (but not the obligation) at all
reasonable times to inspect any Unit. Purchaser shall at its expense maintain
the Units in good operating order, repair and condition. Purchaser shall not
alter any Unit or affix any equipment to any Unit if such alteration or addition
would impair the originally intended function or reduce the value of such Unit.
Any alteration or addition to any Unit shall be at the sole risk of Purchaser.

4. TAXES: Purchaser shall promptly pay all taxes, assessments, fees and other
charges when levied or assessed against any Unit or the ownership or use
thereof, or this Contract or any payments made or to be made to Seller.

5. WAIVER AND INDEMNITY: PURCHASER HEREBY AGREES TO RELEASE, DEFEND, INDEMNIFY
AND HOLD HARMLESS SELLER, ITS DIRECTORS, OFFICERS, EMPLOYEES, AGENTS AND
ASSIGNS FROM AND AGAINST ANY CLAIMS OF PURCHASER OR THIRD PARTIES, INCLUDING
CLAIMS BASED UPON BREACH OF CONTRACT. BREACH OF WARRANTY, PERSONAL INJURY,
PROPERTY DAMAGE, STRICT LIABILITY OR NEGLIGENCE, FOR ANY LOSS, DAMAGE OR INJURY
CAUSED BY OR RELATING TO THE DESIGN, MANUFACTURE, SELECTION, DELIVERY,
CONDITION, OPERATION, USE, OWNERSHIP, MAINTENANCE OR REPAIR OF ANY UNIT.
FURTHER, PURCHASER AGREES TO BE RESPONSIBLE FOR ALL COSTS AND EXPENSES,
INCLUDING REASONABLE ATTORNEYS' FEES, INCURRED BY SELLER OR ITS DIRECTORS,
OFFICERS, EMPLOYEES, AGENTS AND ASSIGNS IN DEFENDING SUCH CLAIMS OR IN
ENFORCING THIS PROVISION UNDER NO CONDITION OR CAUSE OF ACTION SHALL SELLER BE
LIABLE FOR ANY LOSS OF ACTUAL OR ANTICIPATED BUSINESS OR PROFITS OR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES.

6. INSURANCE: Purchaser, at its expense, shall keep each Unit and all equipment
listed as Additional Security insured against all risks for their full
insurable value and shall maintain comprehensive public liability insurance in
an amount reasonably acceptable to Seller. All such insurance shall be in such
form and with such companies as Seller shall reasonably approve, shall be
primary, without right of contribution from any insurance carried by Seller,
and shall provide that such insurance may not be cancelled or altered so as to
affect the interest of Seller without at least 30 days' prior written notice to
Seller. All insurance covering loss or damage to the Units and Additional
Security shall name Seller (or its designee) as loss payee and be payable to
Seller as its interest may appear. Purchaser agrees to notify Seller of any
occurrence which may become the basis of an insurance claim hereunder and not
to make any adjustments with insurers without Seller's prior written consent.
Prior to the first delivery of any Unit to Purchaser, Purchaser shall deliver
to Seller satisfactory evidence of such insurance coverage.

7. EVENTS OF DEFAULT: Each of the following shall constitute an "Event of
Default" hereunder: (a) Purchaser shall fail to make any payment to Seller when
due hereunder or fail to observe or perform any other covenant, agreement or
warranty made by Purchaser hereunder; (b) any representation or warranty of
Purchaser contained herein or in any document furnished to Seller in connection
herewith shall be incorrect or misleading when made; (c) any Unit or additional
security shall become lost, stolen, destroyed, irreparably damaged or subject to
any sale, lien, claim, security interest or encumbrance (other than in favor of
Seller or its assignee); (d) any default shall occur under any other agreement
between Purchaser and Seller; (e) Purchaser or any guarantor of this Contract
shall cease to do business, become insolvent, make an assignment for the benefit
of creditors or file any petition under any bankruptcy, reorganization,
insolvency or moratorium law, or any other law for the relief of debtors, (f)
any involuntary petition shall be filed under any bankruptcy statute against
Purchaser or any guarantor of this Contract or any receiver, trustee, or similar
official shall be appointed to take possession of the properties of Purchaser or
any guarantor of this Contract unless such petition or appointment ceases to be
in effect within 30 days of said filing or appointment; (g) Seller shall
reasonably deem itself to be insecure; or (h) any breach or repudiation by any
guarantor shall occur under any guaranty obtained by Seller in connection with
this Contract.

8. REMEDIES: If any Event of Default shall occur, Seller may, at its option, do
any one or more of the following: (a) Declare all amounts due or to become due
under this Contract, excluding any unearned portion of the Finance Charge,
immediately due and payable; (b) recover any additional damages and expenses
sustained by Seller by reason of the breach of any covenant, representation or
warranty contained in this Contract; (c) enforce the security interest granted
hereunder; (d) without notice, liability or legal process, enter upon the
premises where any of the Units or additional security may be and take
possession thereof, and (e) require Purchaser to assemble the Units and
additional security and make them available to Seller at a place designated by
Seller which is reasonably convenient to both parties. Time is of the essence of
this Contract. Seller shall have all rights given to a secured party by law and
may retain all monies theretofore paid by Purchaser hereunder as compensation
for the reasonable use of the Units by Purchaser. Seller may, at its option,
undertake commercially reasonable efforts to sell the Units and additional
security, and the proceeds of any such sale shall be applied: First, to
reimburse Seller for all reasonable expenses of retaking, holding, preparing for
sale, and selling the Units and additional security, including all taxes and
reasonable attorneys' fees, and second, to the extent not previously paid by
Purchase, to pay Seller all amounts then due or accrued under this Contract,
including any accelerated payments and late payment charges. Any surplus shall
be paid to the person entitled thereto. Purchaser shall promptly pay any
deficiency to Seller. Purchaser acknowledges that sales for cash or on credit to
a wholesaler, retailer or user of the Units or additional security, and with or
without the Units or additional security being present at such sale, are all
commercially reasonable. Purchaser agrees to pay all reasonable attorneys' fees
(to the extent permitted by applicable law) and all costs and expenses incurred
by Seller in enforcing this Contract. The remedies provided herein shall be
cumulative and in addition to all other remedies at law or in equity. If
Purchaser fails to perform any of its obligations under this Contract, Seller
may (but need not) at any time thereafter perform such obligations and the
expenses incurred in connection therewith shall be payable by Purchaser upon
demand.

9. SECURITY INTEREST: PURCHASER ASSURANCES AND REPRESENTATIONS: To secure
payment of Purchaser's indebtedness to Seller hereunder and the performance of
all obligations of Purchaser hereunder, Purchaser hereby grants to Seller a
continuing security interest in the Units, and in the equipment, if any,
described as Additional Security on the front of this Contract, including all
attachments, accessories and optional features for such Units and Additional
Security (whether or not installed thereon) and all substitutions,
replacements, additions and accessions thereto, and proceeds of all the
foregoing including, but not limited to, proceeds in the form of chattel paper.
Purchaser will, at its expense, do any act and execute, acknowledge, deliver,
file, register and record any Documents which Seller deems desirable in its
discretion to protect Seller's security interest and Seller's rights and
benefits under this Contract. Purchaser hereby irrevocably appoints Seller as
Purchaser's Attorney-in-Fact for the signing and filing of such documents and
authorizes Seller to delegate these limited powers. Purchaser acknowledges the
signature of Seller or said delegatee upon such documents to be the same as
Purchaser's own for all purposes and with the present intent to authenticate
the document. Purchaser represents and warrants to Seller that (a) Purchaser
has the power to make, deliver and perform under this Contract; (b) the person
executing and delivering this Contract is authorized to do so on behalf of
Purchaser; (c) this Contract constitutes a valid obligation of Purchaser,
legally binding upon it and enforceable in accordance with its terms; and (d)
all credit, financial and other information submitted to Seller in connection
with this Contract is and shall be true, correct and complete. Purchaser
further represents and warrants to Seller that Purchaser is and shall remain a
Corporation registered in the state of NV ("Business Location"); and Purchaser
will not change its form of business organization or Business Location without
prior written notice to Seller.

10. ASSIGNMENT; COUNTERPARTS: The rights and remedies of Seller under this
Contract may be assigned by Seller at any time. If this Contract is assigned by
Seller, the term "Seller" shall thenceforth mean Seller's assignee, and if
assigned to a partnership, shall thenceforth mean such partnership and, for
purposes of Sections 2, 4, 5 and 6, each partner in such partnership. If
notified by Seller, Purchaser shall make all payments due hereunder directly to
the party designated in such notice without any offset or deduction whatsoever.
Purchaser waives, as to Seller's assignee, all claims and defenses Purchaser
may have or assert against Seller and agrees that no such claim or defense will
be asserted against Seller's assignee. No assignment of this Contract by Seller
shall release any claim Purchaser may have against Seller hereunder. No
assignment of this Contract or any right or obligation hereunder may be made by
Purchaser without the prior written consent of Seller. This Contract shall be
binding upon and inure to the benefit of Seller and Purchaser and their
respective successors and assigns. Although multiple counterparts of this
document may be signed, only the counterpart accepted, acknowledged and
certified by Caterpillar Financial Services Corporation on the signature page
thereof as the original will constitute original chattel paper.

11. EFFECT OF WAIVER; ENTIRE AGREEMENT; MODIFICATION OF CONTRACT; NOTICES: No
delay or omission to exercise any right or remedy accruing to Seller hereunder
shall impair any such right or remedy nor shall it be construed to be a waiver
of any breach or default of Purchaser. Any waiver or consent by Seller under
this Contract must be in writing specifically set forth. This Contract
completely states the rights of Seller and Purchaser with respect to the Units
and supersedes all prior agreements with respect thereto. No variation or
modification of this Contract shall be valid unless in writing. All notices
hereunder shall be in writing, addressed to each party at the address set
forth on the front of this Contract or at such other address as may hereafter
be furnished in writing.

12. APPLICABLE LAW, JURISDICTION AND JURY TRIAL WAIVER PROVISIONS: This
Agreement shall be governed by and construed under the laws of the State of
Tennessee, without giving effect to the conflict-of-laws principles thereof,
and Purchaser hereby consents to the jurisdiction of any state or federal court
located within the State of Tennessee. THE PARTIES HERETO HEREBY WAIVE THE
RIGHT TO TRIAL BY JURY IN ANY ACTION ARISING OUT OF OR RELATED TO THIS
AGREEMENT, THE OBLIGATIONS OR THE COLLATERAL.

13. SEVERABILITY; SURVIVAL OF COVENANTS: If any provision of this Contract
shall be invalid under any applicable law, such provision shall be deemed
omitted but the remaining provisions hereof shall be given effect. All
obligations of Purchaser under this Contract shall survive the expiration or
termination of this Contract to the extent required for their full observance
and performance.<PAGE>
                                                                  Exhibit 10.199

                       LOAN CONTRACT - SECURITY AGREEMENT
<Table>
<Caption>
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Seller's Name and Address
DEERE CREDIT INC., PO BOX 6600, JOHNSTON, IA 50131-6600
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<S>                                                                                 <C>
Borrower's (Debtor's) Name (Last Name First) and                                    Borrower's (Debtor's) Name (Last Name First) and
Mailing Address (Including County and Zip)                                          Mailing Address (Including County and Zip)
MEADOW VALLEY CONTRACTORS, INC.
PO BOX 60726
PHOENIX AZ 85082-0726
------------------------------------------------------------------------------------------------------------------------------------
</Table>
<Table>
<S>                          <C>                           <C>                            <C>
Borrower's (Debtor's)        Borrower (Debtor)             Borrower (Debtor)              Place of Filing
Phone No.                    Resides in (County/State)     Agrees to Keep Goods in        (Town & State)
                                                           County/State
602-437-5400                 Arizona, Nevada, Utah         Arizona, Utah, Nevada           AZ-SOS
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Borrower's Social Security                                                                Name and Title of Signing Officer
Number (First Signer)                            Type of Business                            (If Corporation or L.L.C.)
or Tax Id Number

880171959                     Proprietor / /  Partner / /  Corporation /X/  LLC / /       BRAD LARSON - PRESIDENT
------------------------------------------------------------------------------------------------------------------------------------
</Table>

I hereby apply to Deere Credit, Inc. for a loan of the Principal Balance shown
below, and on the following items and conditions. The loan will be used to pay
for the purchase from the Seller of the Equipment described below (the "Goods")
I agree that I have received the Goods.

PARTIES. In this agreement, the words "I", "me", and "my" mean the persons,
whether one or more, who sign it as "Borrower(s)" (who is also known as
"Debtor(s)"). Except for in the NOTICE TO BORROWER(S) at the bottom of the
page, the words "Lender", "Secured Party", and "you" mean Deere Credit, Inc. or
its assignee.

PROMISSORY NOTE: If this Loan Contract is accepted by Lender, I promise to pay
to Lender the Principal Balance, as in Line 6 below, and finance charges
thereon computed on the daily unpaid balance of the Principal Balance and to
pay the installments as shown below, with such adjustments in the amount or
number of installments as may be necessary to reflect actual finance charges
earned. If more than one person signs this Agreement as "Borrower", we will be
jointly and severally liable for all amounts due under this Agreement.

I REPRESENT THAT THE GOODS ARE BEING PURCHASED FOR A BUSINESS OR COMMERCIAL
PURPOSE.

<Table>
<Caption>
------------------------------------------------------------------------------------------------------------------------------------
 Quantity    New/Used    Manufacturer   Model        Good (Equipment)               Product Identification No.  Delivered Cash Price
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>      <C>            <C>     <C>                                     <C>                           <C>
    1           U        JOHN DEERE     160L    Equity Add On #17 880171959 AA          P00160X040482                 $22,159.21
                                                Excavator Ins Value $80,000.00
------------------------------------------------------------------------------------------------------------------------------------
    1           U        JOHN DEERE     310E    Equity Add On #17 880171959 AB Wheel    T0310EX839952                 $11,944.32
                                                Loader Backhoe Ins Value $35,000.00
------------------------------------------------------------------------------------------------------------------------------------
    1                                           Operating Loan w/Additional                                           $30,000.00
                                                Security of:
------------------------------------------------------------------------------------------------------------------------------------
    1           U        JOHN DEERE      650G   Crawler Dozer, Ins Value                T0650GII851874                    $0.00
                                                $52,000.00
------------------------------------------------------------------------------------------------------------------------------------
    1           U        JOHN DEERE      210L   Landscape Loader, Ins Value             T0210LE840042                      0.00
                                                $21,000.00
------------------------------------------------------------------------------------------------------------------------------------
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<Caption>
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 Quantity    Manufacturer   Model     Description of Trade-In (From Purchase Order      Product Identification No.            Amount
------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------
 CASH DOWN PAYMENT: $0.00                                                                     TOTAL TRADE-IN:              $0.00
------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------
</Table>

<Table>
<Caption>
-----------------------------------------------------------------------------------------------------------------------------------
           MONTHLY INSTALLMENTS
-------------------------------------------
Number of       Amount of     First Payment
Payments       Each Payment       Due Date                                 ITEMIZATION OF PRINCIPAL BALANCE
-------------------------------------------
<S>               <C>              <C>                  <C>                                                   <C>      <C>
   36             $2,007.87        11/20/02
------------------------------------------------------------------------------------------------------------------------------------
                                                        Sales Tax Paid to Government Agencies                               $0.00
------------------------------------------------------------------------------------------------------------------------------------
                                                        Cash Price (Including Tax)                            1        $64,103.53
------------------------------------------------------------------------------------------------------------------------------------
                                                        Total Down Payment, Sum of Trade-In and               2             $0.00
                                                        Cash Down Payment
------------------------------------------------------------------------------------------------------------------------------------
                                                        Unpaid Balance of Cash Price (Paid to Seller)         3        $64,103.53
------------------------------------------------------------------------------------------------------------------------------------
                                                        Official Fees (Paid to Public Officials)              4             $7.00
------------------------------------------------------------------------------------------------------------------------------------
                                                        Documentation Fees                                    5         $1,014.50
------------------------------------------------------------------------------------------------------------------------------------
Payments are due each successive month on the same      Principal Balance (Lines 3, 4 and 5)
day of the month as the first payment except as         The amount of credit provided to Borrower(s)          6        $65,125.03
follows:
------------------------------------------------------------------------------------------------------------------------------------
                                                        Finance Charge (Based on Line 6)
                                                        The dollar amount the credit will cost Borrower(s)    7         $7,158.29
------------------------------------------------------------------------------------------------------------------------------------
                                                        Total (Lines 6 and 7). The amount the Borrower(s)
                                                        will have paid after having made all payments as
                                                        scheduled                                             8        $72,283.32
------------------------------------------------------------------------------------------------------------------------------------
DATE FINANCE CHARGE BEGINS: 10/20/02                    Interest Rate:                                                      6.90%
------------------------------------------------------------------------------------------------------------------------------------
</Table>

SECURITY AGREEMENT: To secure the indebtedness evidenced by this contract and
any other indebtedness that I may owe to Secured Party or its affiliate, I grant
Secured Party a Security Interest in the Goods described above (which term
includes items, if any, listed as "security" or "additional security") and all
parts and accessories now or hereafter incorporated in or on such Goods by way
of addition, accession, or replacement. Buyer represents that all trade-in
property, if any, is free and clear of all security agreements, liens and
encumbrances. I also grant you a Security Interest in all proceeds, including
insurance proceeds and refund of insurance premiums financed hereunder. I
acknowledge that all security granted on any other Contract between you and me
shall also ensure the obligations described in this Contract. You can inspect
the Goods at anytime. I REPRESENT THAT THE GOODS ARE BEING PURCHASED FOR A
BUSINESS OR COMMERCIAL PURPOSE.

EARLY PAYMENT: I may prepay my obligation in full at any time prior to the
original or extended maturity and will be charged only for earned Finance
Charges.

ADDITIONAL CONTRACT INFORMATION: See the front and back of this agreement for
additional information and terms regarding non-payment, default, the right to
demand immediate payment, and prepayment refunds.

LATE PAYMENTS: On each installment not paid within ten (10) days of its due
date, I promise to pay you a late charge not to exceed 5% of the delinquent
installment.

FINANCE CHARGE BEGIN DATE: I acknowledge that unless this Contract is not
accepted by Secured Party, the finance charge shall commence accruing on this
date specified above, regardless of when I execute this Contract.
STATE LAW APPLYING: THE CONSTRUCTION AND VALIDITY OF THIS AGREEMENT SHALL BE
CONTROLLED BY THE LAW OF THE STATE OF IOWA, WHERE THIS AGREEMENT IS ACCEPTED,
AND THE VALIDITY OF THE SECURITY INTEREST SHALL BE CONTROLLED BY THE LAW OF THE
STATE WHERE THE GOODS ARE TO BE KEPT AND USED.

-------------------------------------------------------------------------------
      PHYSICAL DAMAGE INSURANCE REQUIRED (See Provisions on Reverse Side)
-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
  ADDITIONAL PROVISIONS CONCERNING RIGHTS OF THE PARTIES ON REVERSE SIDE ARE A
                             PART OF THIS CONTRACT
-------------------------------------------------------------------------------

NOTICE TO BORROWER(S): 1. Do not sign this contract before you read it or if it
contains blank spaces.  2. You are entitled to an exact and completely filled in
copy of this contract when you sign it. Keep it to protect your rights.

CAUTION: IT IS IMPORTANT THAT YOU THOROUGHLY READ THE CONTRACT BEFORE YOU SIGN
IT.

I acknowledge receipt of a true copy hereof.

MEADOW VALLEY CONTRACTORS, INC.

Bradley E. Larson                     President           10/14/02
------------------------------------------------------   -----------
Borrower's (Debtor's) Signature       BRAD LARSON           Date

------------------------------------------------------   -----------
Borrower's (Debtor's) Signature                             Date

------------------------------------------------------   -----------
Borrower's (Debtor's) Signature                             Date

DO NOT WRITE IN SHADED AREA - FOR DEERE CREDIT SERVICES, INC. USE ONLY

---------------------------------------------------------------------
      Accepted by: Deere Credit, Inc. (Lender/Secured Party)

At    6400 NW 86th Street PO Box 6600, Johnston, Iowa 50131-6600
 :
     ------------------------------------------------------------
By
 :
     ----------------------------------------------   -----------
                    (Authorized Signature)               Date

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