AWA completed Probable Maximum Precipitation, Precipitation Frequency, and Climate change Assessments for all of Vale’s facilities in the Brazilian states of Minas Gerais and Para. These outputs were utilized for all aspects of hydrologic analyses, water management activities, and engineering design decisions related to mining operations.
| Para (1 km2) | 24-hour | |||
| ARI | AEP | q50 | q5 | q95 |
| 1 | 9.9-1 | 55.0 | 53.4 | 60.3 |
| 2 | 5.0-1 | 100.5 | 100.0 | 109.3 |
| 5 | 2.0-1 | 128.9 | 128.5 | 139.9 |
| 10 | 1.0-1 | 148.3 | 147.1 | 161.2 |
| 25 | 4.0-2 | 173.4 | 170.1 | 189.5 |
| 50 | 2.0-2 | 192.5 | 187.1 | 211.6 |
| 100 | 1.0-2 | 211.9 | 203.6 | 234.3 |
| 200 | 5.0-3 | 231.6 | 220.0 | 257.7 |
| 500 | 2.0-3 | 217.6 | 198.2 | 252.6 |
| 1,000 | 1.0-3 | 278.9 | 257.4 | 315.1 |
| 5,000 | 2.0-4 | 328.4 | 294.0 | 378.0 |
| 10,000 | 1.0-4 | 350.5 | 309.2 | 406.6 |
| 100,000 | 1.0-5 | 427.4 | 358.6 | 509.5 |
| 1,000,000 | 1.0-6 | 509.8 | 405.8 | 625.0 |
| 10,000,000 | 1.0-7 | 598.1 | 451.6 | 756.0 |
| 100,000,000 | 1.0-8 | 692.8 | 495.4 | 902.0 |
| 1,000,000,000 | 1.0-9 | 794.3 | 536.2 | 1069.9 |
| 10,000,000,000 | 1.0-10 | 903.2 | 574.4 | 1262.6 |
