The main object of this project is the territory, already in the Amazonian slope, that forms the high part of the Madeira river basin. Here the rainfall is sufficient for the dry land cultivation, the vegetation does not usually have much power and its colonization is within the possible. They are the Plains of Mojos, horizontal alluvial plain between the Andes and the Brazilian archaic massif, whose limits are the Beni and Guapore rivers. These rivers, together with the Mother of God and the Mamore, form a fan that, when gathered, give rise to Madeira. The river makes its way laboriously through the massif of hard bottoms by means of streams and waterfalls. The copious rains do not have a sufficiently rapid exit, forming a vast surface of flood in which the fine sediments that starts from the mountains are deposited, creating a vast alluvial plain, rich and deep. Every year an area of 120,000 km2 is covered by the waters, which take too long to leave due to the extreme horizontality of the plain and the narrowing of the channels below. This drainage work is what the human industry should seek. With this, the vast region would be won for cultivation and Bolivia would have a more solid material base than its mines to sustain.