Exhibit 10.23
 PROMISSORY NOTE
 Borrower:
    
    READY MIX, INC., a Nevada corporation3430 EAST FLAMINGO ROAD, SUITE 100
    
    Lender:
    
    NATIONAL BANK OF ARIZONA, a
national bankingassociationLAS VEGAS, NV 89121
    
    
    
    Mesa Main Office1119 WEST SOUTHERN AVENUEMESA, AZ 85210
 Principal Amount: $1,500,000.00
    
    Interest Rate: 7.345%
    
    Date of Note: May 26, 2006
 PROMISE TO PAY
 PAYMENT
 EFFECTIVE RATE.
 PREPAYMENT PENALTY; MINIMUM INTEREST CHARGE. minimum interest charge of $250.00. Upon prepayment of this Note, Lender
is entitled to the following prepayment penalty: Prepayment shall be defined as any
accumulated unscheduled principal reduction of more than 5% of the original principal note
amount, occurring annually from the anniversary date of this Note. If Borrower chooses to prepay
this Note at any time during the first five years, in whole or in part; a prepayment penalty
will be due concurrent with the prepayment equal to 5% of the prepayment during the first year,
4% during the second year, 3% during the third year, 2% during the fourth year and 1% during the
fifth year. Thereafter, the Borrower may prepay this Note, in whole or in part, without
prepayment penalty. Partial prepayments shall then be applied against required payments of the
most remote maturity, and will not extend the dates nor change the amounts of subsequent
installment payments. No partial prepayment may be made with funds provided through borrowings.
 LATE CHARGE.
 INTEREST AFTER DEFAULT.
 DEFAULT.
 Payment Default.
 Other Defaults.
 Default in Favor of Third Parties.
 Environmental Default.
 False Statements.
 Insolvency.
 Creditor or Forfeiture Proceedings.
 Events Affecting Guarantor.




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PROMISSORY NOTELoan No: 9001
    
    (Continued)
    
    Page 2
 Change In Ownership.
 Adverse Change.
 Insecurity.
 Cure Provisions.
 LENDERS RIGHTS.
 ATTORNEYS FEES; EXPENSES.
 GOVERNING LAW. This Note will be governed by federal law applicable to Lender and, to the extent
not preempted by federal law, the laws of the State of Arizona without regard to its conflicts of
law provisions. This Note has been accepted by Lender in the State of Arizona.
 DISHONORED ITEM FEE.
 RIGHT OF SETOFF.
 COLLATERAL.
 ARBITRATION DISCLOSURES.
 1.
    
    ARBITRATION IS FINAL AND BINDING ON THE PARTIES AND SUBJECT TO ONLY VERY LIMITED REVIEW BY A
COURT.2.
    
    IN ARBITRATION THE PARTIES ARE WAIVING THEIR RIGHT TO LITIGATE IN COURT, INCLUDING THEIR
RIGHT TO A JURY TRIAL.3.
    
    DISCOVERY IN ARBITRATION IS MORE LIMITED THAN DISCOVERY IN COURT.4.
    
    ARBITRATORS ARE NOT REQUIRED TO INCLUDE FACTUAL FINDINGS OR LEGAL REASONING IN THEIR
AWARDS. THE RIGHT TO APPEAL OR SEEK MODIFICATION OF ARBITRATORS RULINGS IS VERY LIMITED.5.
    
    A PANEL OF ARBITRATORS MIGHT INCLUDE AN ARBITRATOR WHO IS OR WAS AFFILIATED WITH THE BANKING
INDUSTRY.6.
    
    ARBITRATION WILL APPLY TO ALL DISPUTES BETWEEN THE PARTIES, NOT JUST THOSE CONCERNING THE
AGREEMENT.7.
    
    IF YOU HAVE QUESTIONS ABOUT ARBITRATION, CONSULT YOUR ATTORNEY OR THE AMERICAN ARBITRATION
ASSOCIATION.




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PROMISSORY NOTELoan No: 9001
    
    (Continued)
    
    Page 3
    SUCCESSOR INTERESTS.
 GENERAL PROVISIONS.
 PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS OF THIS NOTE. BORROWER
AGREES TO THE TERMS OF THE NOTE.
 BORROWER ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS PROMISSORY
NOTE.
 BORROWER:
 READY MIX, INC., A NEVADA CORPORATION
 /s/ Bradley E.
Larson  BRADLEY E. LARSON, Chief
Executive Officer of
       READY MIX,
INC., a Nevada corporation
 C:\LPWIN\CFI\LPL\D20.FC




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BUSINESS LOAN AGREEMENT
 Borrower:
    
    READY MIX, INC., a Nevada corporation
    
    Lender:
    
    NATIONAL BANK OF ARIZONA, a national banking3430 EAST FLAMINGO ROAD, SUITE 100
    
    
    
    associationLAS VEGAS, NV 89121
    
    
    
    Mesa Main Office1119 WEST SOUTHERN AVENUEMESA, AZ 85210
 THIS BUSINESS LOAN AGREEMENT dated May 26, 2006, is made and executed between READY MIX, INC.,
a Nevada corporation (Borrower) and NATIONAL BANK OF ARIZONA, a national banking association
(Lender) on the following terms and conditions. Borrower has received prior commercial loans
from Lender or has applied to Lender for a commercial loan or loans or other financial
accommodations, including those which may be described on any exhibit or schedule attached to
this Agreement (Loan). Borrower understands and agrees that: (A) in granting, renewing, or
extending any Loan, Lender is relying upon Borrowers representations, warranties, and
agreements as set forth in this Agreement; (B) the granting, renewing, or extending of any Loan
by Lender at all times shall be subject to Lenders sole judgment and discretion; and (C) all
such Loans shall be and remain subject to the terms and conditions of this Agreement.
 TERM.
 CONDITIONS PRECEDENT TO EACH ADVANCE.
 Loan Documents.
 Borrowers Authorization.
 Payment of Fees and Expenses.
 Representations and Warranties.
 No Event of Default.
 REPRESENTATIONS AND WARRANTIES.
 Organization.
 Assumed Business Names. None.
 Authorization.
 Financial Information.
 Legal Effect.
 Properties.
 Hazardous Substances.




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##### 



BUSINESS LOAN AGREEMENTLoan No: 9001
    
    (Continued)
    
    Page 2
  Litigation and Claims.
 Taxes.
 Lien
Priority.
 Binding Effect.
 AFFIRMATIVE COVENANTS.
 Notices of Claims and Litigation.
 Financial Records.
 Financial Statements.
 Annual Statements.
  Additional Information.
 Insurance.
 Insurance Reports.
 Other Agreements.
 Loan Proceeds.
 Taxes, Charges and Liens.
 Performance.
 Operations.




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BUSINESS LOAN AGREEMENTLoan No: 9001
    
    (Continued)
    
    Page 3
 Environmental Studies.
 Compliance with Governmental Requirements.
 Inspection.
 Environmental Compliance and Reports.
 Additional Assurances.
 RECOVERY OF ADDITIONAL COSTS.
 LENDERS EXPENDITURES.
 NEGATIVE COVENANTS.
 Indebtedness and Liens.
 Continuity
of Operations.
 Loans, Acquisitions and Guaranties.
 Agreements.
 CESSATION OF ADVANCES.




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BUSINESS LOAN AGREEMENTLoan No: 9001
    
    (Continued)
    
    Page 4
  RIGHT OF SETOFF.
 DEFAULT.
 Payment Default.
 Other Defaults.
 Environmental Default.
 Default in Favor of Third Parties.
 False Statements.
 Insolvency.
 Defective Collateralization.
 Creditor or Forfeiture Proceedings.
 Events Affecting Guarantor.
 Change in Ownership.
 Adverse
Change.
 Insecurity.
 Right to Cure.
 EFFECT OF AN EVENT OF DEFAULT.
 ERRORS AND OMISSIONS PROVISION.
 FINANCIAL RATIO COVENANTS.
 MISCELLANEOUS PROVISIONS.




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##### 



BUSINESS LOAN AGREEMENTLoan No: 9001
    
    (Continued)
    
    Page 5
 Amendments.
 Arbitration Disclosures.
 1.
    
    ARBITRATION IS FINAL AND BINDING ON THE PARTIES AND SUBJECT TO ONLY VERY LIMITED REVIEW BY A
COURT.2.
    
    IN ARBITRATION THE PARTIES ARE WAIVING THEIR RIGHT TO LITIGATE IN COURT, INCLUDING THEIR
RIGHT TO A JURY TRIAL.3.
    
    DISCOVERY IN ARBITRATION IS MORE LIMITED THAN DISCOVERY IN COURT.4.
    
    ARBITRATORS ARE NOT REQUIRED TO INCLUDE FACTUAL FINDINGS OR LEGAL REASONING IN THEIR
AWARDS. THE RIGHT TO APPEAL OR SEEK MODIFICATION OF ARBITRATORS RULINGS IS VERY LIMITED.5.
    
    A PANEL OF ARBITRATORS MIGHT INCLUDE AN ARBITRATOR WHO IS OR WAS AFFILIATED WITH THE BANKING
INDUSTRY.6.
    
    ARBITRATION WILL APPLY TO ALL DISPUTES BETWEEN THE PARTIES, NOT JUST THOSE CONCERNING THE
AGREEMENT.7.
    
    IF YOU HAVE QUESTIONS ABOUT ARBITRATION, CONSULT YOUR ATTORNEY OR THE AMERICAN ARBITRATION
ASSOCIATION.
       Attorneys Fees; Expenses.




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##### 



BUSINESS LOAN AGREEMENTLoan No: 9001
    
    (Continued)
    
    Page 6
  Caption Headings.
 Consent to Loan Participation.
 Governing Law. This Agreement will be governed by federal law applicable to Lender and, to the
extent not preempted by federal law, the laws of the State of Arizona without regard to its
conflicts of law provisions. This Agreement has been accepted by Lender in the State of
Arizona.
 No Waiver by Lender.
 Notices.
 Severability.
 Subsidiaries and Affiliates of Borrower.
 Successors and Assigns.
 Survival of Representations and Warranties.
 Time is of the Essence.
 DEFINITIONS.
 Advance.
 Agreement.
 Borrower.
 Collateral.




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##### 



BUSINESS LOAN AGREEMENTLoan No: 9001
    
    (Continued)
    
    Page 7
 Environmental Laws.
 Event of Default.
 GAAP.
 Grantor.
 Guarantor.
 Guaranty.
 Hazardous Substances.
 Indebtedness.
 Lender.
 Loan.
 Note.
 Permitted Liens.
 Related Documents.
 Security Agreement.
 Security Interest.
 BORROWER ACKNOWLEDGES HAVING READ ALL THE PROVISIONS OF THIS BUSINESS LOAN AGREEMENT AND BORROWER
AGREES TO ITS TERMS. THIS BUSINESS LOAN AGREEMENT IS DATED MAY 26, 2006.
 BORROWER:
 READY MIX, INC., A NEVADA CORPORATION
 By:
    
    /s/ Bradley E. Larson

BRADLEY E. LARSON, Chief Executive Officer ofREADY MIX, INC., a Nevada corporation