| Estimation point | Map number and gage stations | |
| Downstream | Upstream | |
| EP1 | 1. Mataquito in Licantén | 2. Teno after Claro River |
| 3. Palos before Colorado River | ||
| 4. Colorado before Palos River | ||
| EP2 | 6. Maule in Forel | 7. Claro in Rauquén |
| 10. Loncomilla in Las Brisas | ||
| 9. Maule in Longitudinal | ||
| EP3 | 7. Claro in Rauquén | 5. Claro in Camarico |
| 8. Lircay in Las Rastras bridge | ||
| EP4 | 10. Loncomilla in Las Brisas | 11. Loncomilla in Bodega |
| 13. Achibueno in La Recova | ||
| 12. Ancoa in El Morro | ||