While the lower Rio Grande Valley has experienced a population surge, the region is prone to significant flooding due to the flat terrain and rapidly expanding urbanization, which affects the natural environment through disturbing lands and replacing natural vegetation with impervious surfaces through roads and buildings, which ultimately affects water quality. With this in mind, The City of Mercedes and the university have collaborated on a proposal that essentially solves this flooding problem. The green infrastructure (GI) master plan to mitigate localized flooding in a high priority region within the city limits that can then be duplicated into other regions across the lower valley. The objectives of the project are to: 1) minimizing the environmental impact of the Rainwater, 2) avoid localized flooding. 3) stop the contamination of the water, and 4) integrate it to the construction projects through the development of natural drainages. The GI masterplan and practices were developed in the City of Mercedes where they had the most permeable pavements/sidewalk and bioretention/bioswales.