[EN] Sagunto’s town council has no up to date archive showing the sewer system in all its complex entirety. This fact makes the conservation of the whole network as well as any possible needed repairing work a rather intractable activity. For that reason, Aigües de Sagunt has thrown competitive tendering proceedings in order to hire a firm which obtains such information for them. The winning company was the one I am currently working for, Sertopograf, which will be in charge of the study. A coordinate frame on ground level will be developed containing manholes and scuppers of sewage as much as of rainfall waters. Subsequently, all manholes will be open up so as to verify connections, their depths and the type of materials lines have been made of. All data will be integrated in QGIS containing all information concerning a determined area within the municipality, while building up layers in shapeline format, of which connections and slopes will be open to observation. These files will be used to carry out a simulation on the workings of the network to go on verifying possible pollution or counter slope cases. Finally, the sewage system will be related to flooding hazard situations and possible solutions will be proposed. TFGM