30 Mar 2017 10:39 UTC 2017089+1039 UTC


The Bahia Grande is a 6500-acre wetland basin located in Cameron County, at the southernmost tip of Texas. The dredging of the Brownsville Ship Channel in the 1930ís, and later the construction of State Highway 48, filled the channels which once allowed tidal exchange between the Bahia Grande and the Gulf of Mexico. With the loss of tidal inflow, the Bahia Grande was transformed from a wetland complex rich in biological resources to dry and barren mudflats.

The U.S. Fish and Wildlife Service (FWS) acquired the Bahia Grande, incorporating it into the Laguna Atascosa Wildlife Refuge. The FWS has since initiated the largest estuary restoration project in the United States. Several local, state and federal agencies are working together to reestablish tidal flow, return native species to the wetland, and study the progression of the Bahia Grande.


In March 2005, the Division of Nearshore Research (DNR) installed a meteorological station and three water quality stations in anticipation of the re-flooding of the basin. Monitoring of water quality began Summer 2005, following the clearing of culverts leading to the ship channel and the return of some tidal flow into the bay. Sensor deployment and maintenance is achieved through a collaborative partnership with the University of Texas at Brownsville & Texas Southmost College.

Click on a station in the map above to view current conditions at that location. In some browsers, you can hover over a flag to determine which station you are pointing at.

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Page last modified on June 22, 2011, at 10:29 AM