Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          07-142-06-35  04-0120J4                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  73%          83%                             
04-ALA-80-1.6/3.5                    Federal Project:                                   
                                     NONE                                               
                                                                                        
                                                                                        
Progress payment No. 13            Payment period ending: 05-20-07                      
DIABLO CONTRACTORS INC                                                                  
7 CROW CANYON COURT STE 100                                                             
SAN RAMON CA 94583                                                                      
                                                                                        
                                                                                        
Escrow No.  02281                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.       8,318,627.58      705,335.00                      
2.a. Extra Work                         778,477.30      100,135.71                      
  b. Adjustment Comp.                   -45,975.79       -9,905.00                      
3. Materials on Hand                    279,150.00      -28,309.00                      
4. Earned Subject to Retention        9,330,279.09      767,256.71                      
5. Mobilization                       1,200,000.00            0.00                      
6. Total Work Completed   10,251,129.09                                                 
7. Deductions                                                                           
8. a.Contract Retentions               -466,513.95      -38,362.83                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor           10,063,765.14      728,893.88                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow       466,510.00                                                  
12. Net Pymt. this Estimate                             728,893.88