Wasa Mayu (Quechua wasa the human back or the back of an animal, mayu river, "back river" Hispanicized spelling Huasa Mayu) is a Bolivian river in the Cochabamba Department, Tiraque Province, Tiraque Municipality and in the Carrasco Province.Tiraque Municipality: population data and map It is a left tributary of Ivirizu River,lib.utexas.edu Detailed map of the area the most important affluent of San Matéo River.
See also List of rivers of Bolivia
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