Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          07-080-14-28  11-254104                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  86%          22%                             
11-SD-75-R20.5/R22.0                    Federal Project:                                
                                     NONE                                               
                                                                                        
                                                                                        
Progress payment No. 06            Payment period ending: 03-20-07                      
PENHALL COMPANY                                                                         
5775 EASTGATE DRIVE                                                                     
SAN DIEGO CA 92121                                                                      
                                                                                        
                                                                                        
Escrow No.  00000                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.         738,880.60        6,404.00                      
2.a. Extra Work                                                                         
  b. Adjustment Comp.                                                                   
3. Materials on Hand                                                                    
4. Earned Subject to Retention          738,880.60        6,404.00                      
5. Mobilization                          70,000.00            0.00                      
6. Total Work Completed      808,880.60                                                 
7. Deductions                                 0.00        1,000.00                      
8. a.Contract Retentions                -36,944.03         -320.20                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor              771,936.57        7,083.80                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow             0.00                                                  
12. Net Pymt. this Estimate                               7,083.80