WILLIAMSON CREEK. Williamson Creek rises just west of Oak Hill in southeastern Travis County (at 30°15' N, 97°55' W) and runs southeast for eighteen miles, through a variety of business and residential areas, to its mouth on Onion Creek (at 30°11' N, 97°43' W). It crosses flat to rolling prairie surfaced by clay and sandy loam that supports hardwoods, mesquite, cacti, and grasses.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article."WILLIAMSON CREEK," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/rbwae), accessed February 27, 2015. Uploaded on June 15, 2010. Published by the Texas State Historical Association.