Jamanxim River

Jamanxim River
Bridge over the Jamaxim
Mouth location in Brazil
Native nameRio Jamanxim (Portuguese)
Location
CountryBrazil
Physical characteristics
Source 
  locationSerra do Cachimbo, Pará
  elevation460 m (1,510 ft)
Mouth 
  coordinates
4°45′23″S 56°26′15″W / 4.756260°S 56.437500°W / -4.756260; -56.437500
  elevation
40 m (130 ft)
Length510 km (320 mi)
Basin size58,771 km2 (22,692 sq mi)
Discharge 
  locationNear mouth
  average(Period: 1971–2000)2,217.9 m3/s (78,320 cu ft/s)
Basin features
ProgressionTapajósAmazonAtlantic Ocean
River systemTapajós

The Jamanxim River is a river of Pará state in north-central Brazil. Originating in the Serra do Cachimbo, it is a tributary of the Tapajós, into which it flows a few kilometers upstream from Itaituba.