| 4 | | Supplemental Agreement for work within scope | $10.8k | 3/10/03 |
| 3 | | Supplemental Agreement for work within scope | $49.8k | 9/19/02 |
| 1 | | Supplemental Agreement for work within scope | $181.2k | 1/18/02 |
| 2 | | Change Order | $41.5k | 1/31/01 |
| Not listed | | Not listed | $273.7k | 11/6/00 |