Dept. of Trans.       SUPPLEMENTAL   Serial No.  Contract No.                           
                                          08-123-07-52  04-264204                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  46%          50%                             
04-SM-101-13.5/17.9                    Federal Project:                                 
                                     HPLU-6204(60)                                      
                             L-6204(60)                                                 
                                                                                        
Progress payment No. 15            Payment period ending: 04-20-08                      
DE SILVA GATES BROSMER A JOINT                                                          
VENTURE OF DE SILVA GATES                                                               
P O BOX 2909                                                                            
DUBLIN CA 94568                                                                         
                                                                                        
Escrow No.  00000                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.      40,283,195.85            0.00                      
2.a. Extra Work                       4,426,586.11      486,869.91                      
  b. Adjustment Comp.                   287,038.21     -448,527.13                      
3. Materials on Hand                    557,383.13            0.00                      
4. Earned Subject to Retention       45,554,203.30       38,342.78                      
5. Mobilization                      11,400,000.00            0.00                      
6. Total Work Completed   56,396,820.17                                                 
7. Deductions                              -680.00            0.00                      
8. a.Contract Retentions                                                                
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor           56,953,523.30       38,342.78                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow             0.00                                                  
12. Net Pymt. this Estimate                              38,342.78