The Philippines is one of the most tropical countries in the world. Many typhoons enter the country annually, and so do the light rains. In a specific area in Sto. Rosario Highway in Pampanga, flooding is always evident. No matter the intensity of the rain, theflooding causes inconvenience to the people who use the road. It hinders the transportation system. The researchers focused on proposing a drainage system that can minimize the longevity of flooding. The length of the proposed extension of drainage system is about 750 meters. The researchers used the Rational Method since it is applicable to the study. The researchers identified 5 catchment areas. The drainage system withdrawal point will be on the two rivers that cover the barangay from point to point. The researchers found that there is no existing drainage within 750 meters of length, there is a huge difference in elevation especially in the catchment areas, and there is an available space wider than the layout of DPWH. The proposed extension of drainage system followed guidelines, and provisions, and is dependent on rainfall intensity duration. The proposed extension of drainage system will help the Barangay to be a better and more habitable place to live.

Keywords : Drainage System, Flooding, Catchment Areas, Rainfall, and Elevation.