Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          08-058-10-43  08-334844                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  89%          84%                             
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. 65            Payment period ending: 02-20-08                      
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.     153,193,720.84    4,276,069.87                      
2.a. Extra Work                      20,123,179.65      138,033.01                      
  b. Adjustment Comp.                38,869,240.69   -1,080,167.19                      
3. Materials on Hand                    428,741.52      -51,052.86                      
4. Earned Subject to Retention      212,614,882.70    3,282,882.83                      
5. Mobilization                      18,343,064.95            0.00                      
6. Total Work Completed  230,529,206.13                                                 
7. Deductions                          -404,451.42            0.00                      
8. a.Contract Retentions            -10,630,744.14     -164,144.15                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor          219,922,752.09    3,118,738.68                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow     9,942,760.00                                                  
12. Net Pymt. this Estimate                           3,118,738.68