Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          03-170-16-15  04-013084                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                 PEP        SAT                                
04-SOL-680-1.5/ .0                    Federal Project:                                  
                                     NONE                                               
                                                                                        
                                                                                        
Progress payment No. 31            Payment period ending: 06-20-03                      
DIABLO CONTRACTORS INC                                                                  
7 CROW CANYON COURT, STE 100                                                            
SAN RAMON, CA 94583                                                                     
                                                                                        
                                                                                        
Escrow No.  01667                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.       6,339,557.90      -35,855.00                      
2.a. Extra Work                          74,786.55        1,591.12                      
  b. Adjustment Comp.                    71,977.76       20,700.00                      
3. Materials on Hand                                                                    
4. Earned Subject to Retention        6,486,322.21      -13,563.88                      
5. Mobilization                         700,000.00            0.00                      
6. Total Work Completed    7,186,322.21                                                 
7. Deductions                              -540.68       62,500.00                      
8. a.Contract Retentions               -324,994.30            0.00                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor            6,860,787.23       48,936.12                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow       324,850.00                                                  
12. Net Pymt. this Estimate                              48,936.12