[EN] The aim of this project is to study the problem that occurs in the last part of the La Cala ravine, located in Finestrat (Alicante), as a consequence of the extreme precipitation periods. These are mainly unusual but generate a dangerous water flow. From the road Avenida de Finestrat to the sink in the coastline, the ravine flows exclusively through a urban area and it has been transformed into a street. That avoids having an appropriate piece of land reserved for it. In order to come to a solution and reduce the negative effects that caused the floods, it has been conducted an analysis from the hydrologic perspective but also hydraulic. The hydrologic analysis has focused on to provide the flood hydrographs but also to investigate how significant it could be a crescent urban development in terms of run-off. Related to the hydraulic infrastructures that have been agreed to calculate, it has been considered a 500-year return period storm. The high level of land occupancy has constrained their design. But, at last, it has been possible to reach a solution that led the water flow in safe conditions. This design is based in three reaches: the first one is an overland flow, in the second one the water goes in to a channel, and finally, the water flows into the sea by pressure.