Exhibit
      10.24

     

    FIRST
      AMENDMENT TO LOAN AND SECURITY AGREEMENT

     

    Reference
      is made to that certain Loan and Security Agreement dated as of March 22,
      2007 (the “Loan and Security Agreement”) between the undersigned Primoris
      Corporation (the “Borrower”) and LaSalle Bank National Association (the “Bank”).
      All capitalized terms used herein without definition shall have the same
      meanings herein as those terms have in the Loan and Security Agreement. The
      Borrower and Bank hereby amend the Loan and Security Agreement as set forth
      below.

     

    	1.  	
            The
              definition of “Pledge Agreements” in Section 1.1 of the Loan and Security
              Agreement is hereby deleted in its
              entirety.

          


     

    	2.  	
            Section
              3.2(a) of the Loan and Security Agreement is hereby deleted in its
              entirety.

          


     

    	3.  	
            Section
              3.2(b) of the Loan and Security Agreement is hereby deleted in its
              entirety.

          


     

    	4.  	
            The
              current Section 3.2(c) of the Loan and Security Agreement shall be
              renumbered as Section 3.2(b) of the Loan and Security
              Agreement.

          


     

    	5.  	
            The
              current Section 3.2(d) of the Loan and Security Agreement shall be
              renumbered as Section 3.2(b) of the Loan and Security
              Agreement.

          


     

    	6.  	
            Section
              6.1(c) of the Loan and Security Agreement is hereby deleted in its
              entirety.

          


     

    	7.  	
            Section
              6.2 of the Loan and Security Agreement is hereby deleted and the following
              is inserted therefore:

          


     

    6.2 Other
      Collateral.
      In
      addition, to the extent required by the Bank per Section 8.20 and Section
      12.5(j) hereof, the Obligations are also secured by the Control
      Agreements.

     

    	8.  	
            Section
              8.25 of the Loan and Security Agreement is hereby deleted in its
              entirety.

          


     

    Except
      as
      specifically amended herein, the Loan and Security Agreement shall continue
      in
      full force and effect in accordance with its original terms. Reference to this
      specific Amendment need not be made in the Loan and Security Agreement or in
      any
      other instrument or document executed in connection therewith, any reference
      in
      any such items to the Loan and Security Agreement being sufficient to refer
      to
      the Loan and Security Agreement as amended hereby.

     

    This
      Amendment may be executed in counterpart, and by facsimile and by the different
      parties on different counterpart signature pages, which taken together shall
      constitute one and the same Agreement. This Amendment shall be governed by
      internal laws of the State of Illinois.

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

     

    Dated
      as
      of this ____ day of ____________, 2007

    

      
        	 	
                LA
                  SALLE BANK NATIONAL ASSOCIATION

              
	 	 
	 	
                By:
                  

              	
                /s/
                  George Linhart

              
	 	 	
                George
                  Linhart

              
	 	 	 
	 	
                Its:

              	
                Senior
                  Vice President

              
	 	 	 
	 	 	 
	 	
                PRIMORIS
                  CORPORATION

              
	 	 
	 	
                By:
                  

              	
                /s/
                  A. Theeuwes

              
	 	 	
                A.
                  Theeuwes

              
	 	 	 
	 	
                Its:

              	
                Chief
                  Financial Officer

              


      

    

     

    
      
         

      

      
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