Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          02-140-11-28  04-226124                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  10%          15%                             
04-MRN-101-8.4/9.7                    Federal Project:                                  
                                     ACNH-P101(992)                                     
                             CML-6204(42)                                               
                                                                                        
Progress payment No. 04            Payment period ending: 05-20-02                      
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.         484,226.99      165,521.50                      
2.a. Extra Work                           6,275.28        6,275.28                      
  b. Adjustment Comp.                                                                   
3. Materials on Hand                          0.00       -3,570.00                      
4. Earned Subject to Retention          490,502.27      168,226.78                      
5. Mobilization                         450,000.00      450,000.00                      
6. Total Work Completed      940,502.27                                                 
7. Deductions                           -10,000.00      -10,000.00                      
8. a.Contract Retentions                -49,050.23      -16,822.68                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor              881,452.04      591,404.10                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow             0.00                                                  
12. Net Pymt. this Estimate                             591,404.10