Lower Rio Grande Valley Low Impact Development Outreach, Education and Demonstration Program

Summary

In this GLO sponsored project, Texas A&M University Kingsville (TAMUK) collaborated with Cameron County and the University of Texas Rio Grande Valley (UTRGV) and local stakeholders to design and construct a bioretention system at the La Esquina subdivision in Cameron County. The objective of the bioretention system implementation was to manage and improve NPS flows, help mitigate flooding and drainage issues, and address NPS pollution water quality concerns; this volume of runoff reduction would also remove pollutants from stormwater runoff and enhance the quality of water in and around the selected colonia.

 

Two separate bioretention cells were designed (Ambiotec Civil Engineering Group, Texas) and constructed in January 2018 at the La Esquina Subdivision on the east entrance to the colonia, approximately 1,050 feet (0.2 miles) south from the intersection of La Esquina Circle and San Jose Road in Los Fresnos, Cameron County, Texas. Education and outreach was provided to community leaders and the general public. A training course was held to educate colonia residents on post-construction maintenance of the bioretention system. Four community workshops were held to demonstrate LID technology and practices to stakeholders outside of the selected colonia.

 

Following construction, TAMUK collected data at another regional bioretention installation and calibrated a WinSLAMM runoff model for this exact site in order to reliably predict unit performance in runoff flow reduction.  More data collection is planned for sampling and monitoring to confirm the effectiveness of the bioretention system through the TCEQ CWA 319 program in 2019.