Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          06-167-08-15  04-276004                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  71%          81%                             
04-SON-101-3.5/3.9                    Federal Project:                                  
                                     ACNH-Q101(58)                                      
                                                                                        
                                                                                        
Progress payment No. 21            Payment period ending: 06-20-06                      
DIABLO CONTRACTORS INC                                                                  
7 CROW CANYON COURT STE 100                                                             
SAN RAMON CA 94583                                                                      
                                                                                        
                                                                                        
Escrow No.  00000                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.       5,716,502.59      313,392.10                      
2.a. Extra Work                         549,272.95        7,058.91                      
  b. Adjustment Comp.                    51,808.79            0.00                      
3. Materials on Hand                     78,507.84      -80,564.00                      
4. Earned Subject to Retention        6,396,092.17      239,887.01                      
5. Mobilization                         880,000.00            0.00                      
6. Total Work Completed    7,197,584.33                                                 
7. Deductions                                                                           
8. a.Contract Retentions                                                                
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor            7,276,092.17      239,887.01                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow             0.00                                                  
12. Net Pymt. this Estimate                             239,887.01