Casa Blanca Reservoir 2018 Survey Report media download(PDF 714.5 KB)

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Casa Blanca Reservoir - 2018 Survey Report

Prepared by John Dennis and Mitchell Nisbet
Inland Fisheries Division - San Antonio District

This is the authors' summary from a 22-page report. For a copy of the complete report, use the download link in the sidebar.

Fish populations in Casa Blanca Reservoir were surveyed in 2018-2019 using electrofishing and gill netting since the last report (2014). Historical data are presented for comparison. This report summarizes the results of the surveys and contains a management plan for the reservoir based on those findings.

Reservoir Description

Casa Blanca is a 1,055 acre reservoir located near Laredo, Texas, in the Rio Grande River watershed. In 1990, the county park located on the lower end of the reservoir was acquired by Texas Parks and Wildlife Department and opened in March of 1991 as Lake Casa Blanca International State Park. Major uses include recreation and irrigation for a golf course. Water level in the reservoir fluctuates, however water level is not recorded. Angler and boat access is very good. Native emergent vegetation occupied 24% of the reservoir in 2018.

Management History

Important sport fishes include Largemouth Bass, catfishes, and Hybrid Striped Bass. Harvest of all sport fish species, except Largemouth Bass, has been regulated according to statewide size and daily bag limits. Largemouth Bass harvest is currently regulated with an 18-inch minimum size limit (implemented in 1994). Palmetto Bass have been stocked regularly with stockings occurring in seven years since 2004. In 2014, Sunshine Bass were stocked instead of Palmetto Bass. Florida Largemouth Bass fingerlings were last stocked in 2011. ShareLunker fingerlings were stocked in 2006, 2008, and 2010.

Fish Community

Management Strategies

Continue to manage fisheries with current regulations. Stock Hybrid Striped Bass annually at the rate of 15 fingerlings per acre. Assess for presence of invasive species concurrent with fisheries and habitat sampling. Fishes will be sampled every four years according to the objective based sampling plan.

Sport Fish Restoration Logo

Performance Report as required by Federal Aid in Sport Fish Restoration Act Texas Federal Aid Project F-221-M-5 Inland Fisheries Division Monitoring and Management Program