| Date | Description | Base Date $m | Current $m | Contractor | Notes | |
| Jun 02 | Original Approved | 436.8 | 436.8 | |||
| Jun 04 | Real Variation - Budgetary Adjustment | 2.6 | 2.6 | 1 | ||
| Aug 04 | Real Variation - Budgetary Adjustment | (0.4) | (0.4) | 2 | ||
| Nov 04 | Real Variation - Transfer | (0.2) | (0.2) | 3 | ||
| Jun 05 | Real Variation - Transfer | (1.8) | (1.8) | 4 | ||
| Jun 05 | Real Variation - Scope | 67.1 | 67.1 | 5 | ||
| Aug 05 | Real Variation - Budgetary Adjustment | (1.5) | (1.5) | 6 | ||
| Aug 08 | Real Variation - Transfer | (27.8) | (27.8) | 7 | ||
| 38.0 | 38.0 | |||||
| Jun 10 | Price Indexation | 72.9 | ||||
| Jun 10 | Exchange Variation | (11.0) | ||||
| Jun 10 | Total Budget | 474.8 | 536.7 | |||