Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          04-268-14-43  08-334844                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  11%          16%                             
08-RIV-215-R37.7/43.9                    Federal Project:                               
08-RIV-91-20.3/21.6                                     ACNH-215-1(219)                 
08-RIV-60-11.5/13.7                             I-215-1(219)                            
                             ACNH-X065(80)                                              
Progress payment No. 07            Payment period ending: 09-20-04                      
WASHINGTON GROUP INTERNATIONAL                                                          
INC OBAYASHI CORPORATION A                                                              
JOINT VENTURE                                                                           
P O BOX 600                                                                             
HIGHLAND CA 92346                                                                       
Escrow No.  02171                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.      10,523,427.44    2,548,441.88                      
2.a. Extra Work                         284,213.53      -16,693.22                      
  b. Adjustment Comp.                                                                   
3. Materials on Hand                    290,094.38       10,365.38                      
4. Earned Subject to Retention       11,097,735.35    2,542,114.04                      
5. Mobilization                       9,171,532.48            0.00                      
6. Total Work Completed   19,979,173.45                                                 
7. Deductions                          -111,116.59      -61,215.40                      
8. a.Contract Retentions             -1,109,773.54     -254,211.41                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor           19,048,377.70    2,226,687.23                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow     1,109,770.00                                                  
12. Net Pymt. this Estimate                           2,226,687.23