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Engineers present HUC‑10 Harlingen watershed flood‑protection study; propose 39 sub‑basins, detention and channel projects
Summary
Civil Systems Engineering presented a HUC‑10 watershed flood protection study covering roughly 287 square miles, identifying 39 sub‑basins, a toolbox of drainage measures (detention basins, channel widening, diversion channels, resaca reclamation) and stream gauges; estimated regional project and benefit figures were presented and TWDB BCA issues discussed.
Engineers from Civil Systems Engineering (CSE) presented a regional HUC‑10 flood protection planning study to the Harlingen City Commission on Feb. 10, 2026, describing a suite of drainage and conveyance measures intended to reduce flood risk across a roughly 287‑square‑mile watershed.
CSE said the study area includes parts of southern Cameron County and western Hidalgo County, multiple irrigation and drainage districts and 12 cities. ‘‘Our goal is to reduce the existing flooding throughout the HUC‑10 watershed area by identifying problem areas and evaluating potential mitigation strategies,’’ Javier Zamora, the lead presenter, told the commission.
The study used NOAA rainfall records, NEXRAD observed events, lidar topography and…
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