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BLANCAS CREEK. Blancas Creek, also known as Blanca Creek, begins ten miles southeast of Laredo in southern Webb County (at 27°29' N, 99°18' W) and extends southwest for eighteen miles to its mouth on Mesquite Creek, nine miles northeast of San Ygnacio in northern Zapata County (at 27°16' N, 99°21' W). It crosses both low-rolling and flat terrain with locally shallow depressions, surfaced by clay and sandy loams that support grasses, mesquite, chaparral, and water-tolerant hardwoods.

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"BLANCAS CREEK," Handbook of Texas Online (, accessed December 01, 2015. Uploaded on June 12, 2010. Published by the Texas State Historical Association.