Ord 1990-037 - Laserfiche WebLink

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Water Resources, the Soil Conservation Service (SCS), and Greenhorne and O'Mara, Inc. On October 7,1988, a final CCO meeting was held with representatives from FEMA, the city, and the study contractor to review the results of the study. 2.0 AREA STUDIED 2.1 Scope of Study This Flood Insurance Study covers the incorporated area of the City of San Marcos, Hays and Caldwell Counties, Texas. The area of study is shown on the Vicinity Map (Figure 1). The following streams were restudied by detailed methods for their entire lengths within the community: the San Marcos River, Sink Creek, Purgatory Creek, Willow Springs Creek, the Blanco River, and Bypass Creek (formerly referred to as Unnamed Tributary to San Marcos River), including its backwater effects on Bypass Creek Tributary I and Bypass Creek Tributary 2. Purgatory Creek Diversion 1 was newly studied by detailed methods from its confluence with Purgatory Creek to a point approximately 5,550 feet upstream; the profile was then extended the remaining 630 feet to its divergence from Purgatory Creek. Stream CC-1 (formerly referred to as Tributary to Cottonwood Creek) was studied by detailed methods from the downstream corporate limits to approximately 1,400 feet upstream of Interstate Route 35/U. S. Route 81. The areas studied by detailed methods were selected with priority given to all known flood hazard areas and areas of projected development and proposed construction through December 1992. Hemphill Creek and the extreme upstream portion of Stream CC-1 were studied by approximate methods. Approximate analyses were used to study those areas having a low development potential or minimal flood hazards. The scope and methods of study were proposed to, and agreed upon by, FEt1Ä and the City of San Marcos. 2.2 Community Description The City of San Marcos, the county seat of Hays County, is located adjacent to the Edwards Plateau and the Texas B1ackland Prairie Land Resource Areas in central Texas. The city is approximately 30 miles southwest of Austin and 50 miles northeast of San Antonio. It is bordered by the unincorporated areas of Hays and Caldwell Counties. In one of their last attempts at the colonization of Texas, the Spanish established San Marcos de Neve in 1808. This was a Spanish villa on the San Marcos River at the Old San Antonio Road crossing a few miles above the confluence of the San Marcos and the Guadalupe Rivers; however, floods, Indian troubles, and a filibuster attack 2