Rio Ouro Preto Extractive Reserve
The Rio Ouro Preto Extractive Reserve () is an extractive reserve in the state of Rondônia, Brazil. Created in 1990, it was one of the first such reserves in Brazil. The residents extract rubber, nuts and other products in the dry season and farm or work outside the reserve in the rainy season, when large areas are flooded. Houses are built on stilts to avoid flooding and discourage animals from entering. Location The Rio Ouro Preto Extractive Reserve is divided between the municipalities of Guajará-Mirim (73.45%) and Nova Mamoré (26.55%) in Rondônia. It has an area of . The BR-421 federal highway runs east from the town of Guajará-Mirim on the Bolivian border, and enters the north part of the reserve. The reserve occupies the basin of the Ouro Preto River between two parallel east-west ranges of hills. It extends westward along the course of the Ouro Preto to where it joins the Pacaás Novos River, which forms the western boundary of the reserve. Altitudes range from above sea level. The reserve is part of the largest block of environmentally protected land in the state, and forms a buffer between the cleared and farmed areas and the strictly protected forest