[About how was gestated the sewerage in Santiago de Chile].

It is possible to estimate as the skeleton for the body of one future sewerage in Santiago (Chile) the web of irrigation ditches designed for the "alarife" (a primitive architect) Gamboa in 1541. Along the three centuries of the colonial period, the ditches not only distributed water for the familial cultures, but also got away from the houses all kind of residues, not only organic, being a fountain of conflicts and fights between the neighbors, that multiple laws and warnings could not ever resolve. The water for drink was taken from the dirty Mapocho River, full of enteric bacteria, with the consequences of Salmonella and Shigella infections, being better but more expensive the water from the ravines near the city, transported on mules or horses. With the arrival of the Republic in 1810, the idea of a sewerage for Santiago similar to the Europeans was growing, and after one discussion and another, and after one project and another, its building started on 1905.