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<br /><; "tLrJl \ \ <br /> :/10 .,., .0 <br /> Cypress-1 8 3 5 0 <br /> Wilson Creek 15 4 10 1 <br /> Willow Springs Creek 23 12 11 0 <br /> WSC-1 4 3 1 0 <br /> Purgatory Creek 27 10 17 0 <br /> PC-1 6 1 5 0 <br /> Purgatory Creek Diversion 1 1 1 0 0 <br /> Sink Creek 18 10 7 1 <br /> Onion Creek 232 14 200 18 <br /> Bear Creek 55 1 43 11 <br /> Little Bear Creek 41 7 34 0 <br /> LB-1 12 2 10 0 <br /> Bear-1 18 0 12 6 <br /> Bear-1A 23 2 18 3 <br /> Bear-2 8 2 5 1 <br /> Barton Creek 34 2 32 0 <br /> long Branch 16 6 10 0 <br /> BC-1 6 0 6 0 <br /> BC-1A 2 0 2 0 <br /> Roy Branch 9 3 6 0 <br /> Cottonwood Branch 7 2 4 1 <br /> Little Barton Creek 18 2 15 1 <br /> BC-2 8 2 6 0 <br /> BC-2A 5 0 5 0 <br /> Schoolhouse Hollow 5 1 4 0 <br /> SH-1 3 0 3 0 <br /> Totals 966 279 583 104 <br /> Source: Hays County Flood Insurance Study, February 18, 1998 <br /> 2.3.7 Flood Events <br /> <br /> <br /> <br />I <br /> <br />I <br /> <br />The U.S. Army Corps of Engineers Fort Worth District published the Flood Hazard <br />lnfonnation Report (FPIR) San Marcos and Blanco Rivers, San Marcos, Texas, dated June <br />1971. The report defines the existing flood risks along the floodplains of the Blanco and San <br />Marcos Rivers, and Purgatory, Willow Springs and Sink Creek in the vicinity of San Marcos. <br />The 1971 report states that the San Marcos River runs through the eastern section of San <br />Marcos and is joined by the Blanco River about four river miles downstream from town. These <br />two rivers and the tributaries of the San Marcos River contribute to the flood problem in San <br />Marcos. <br /> <br />Based on the 1971 report, reliable information on flooding at San Marcos is available for the <br />period 1913 to date (197]). Prior to 1971, the five largest floods on the San Marcos River in <br />descending order of magnitude of flood event were: <br /> <br />1. September 10,1921 <br /> <br />I <br /> <br />Hays County, Texas <br />Miligation Plan <br />55 <br />