Madeira River
Madeira River The river in the outskirts of Porto Velho Map of the Madeira River watershed Etymology Portuguese, "wood river" Location Country Bolivia, Brazil Cities Nova Olinda do Norte, Borba, Novo Aripuanã, Manicoré, Humaitá, Porto Velho Physical characteristics Source Confluence of Madre de Dios and Mamoré - location Near Guayaramerín, Bolivia - coordinates 10°38′19″S 65°39′20″W / 10.63861°S 65.65556°W / -10.63861; -65.65556 - elevation 180 m (590 ft) Mouth Amazon River - location Amazonas, Brazil - coordinates 3°22′32″S 58°46′23″W / 3.37556°S 58.77306°W / -3.37556; -58.77306 Coordinates: 3°22′32″S 58°46′23″W / 3.37556°S 58.77306°W / -3.37556; -58.77306 - elevation 40 m (130 ft) Length 3,380 km (2,100 mi) [1] Basin size 850,000 km 2 (330,000 sq mi) Discharge - location near mouth - average 31,200 m 3 /s (1,100,000 cu ft/s) - minimum 2,346 m 3 /s...