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.Federal Emergency I\1anagement Agency Washington, D.C. 20472 DEC 6 1990 CERTIFIED MAIL (102a) RETURN RECEIPT REQUESTED Community: City of San Marcos, Hays and Caldwell The Honorable Kathy Morris Counties, Texas Mayor of the City of San Marcos Map Panel Numbers: 485505 0009 D City Hall 485505 0010D 630 East Hopkins Effective Date of San Marcos, Texas 78666 this Revision: DEe 6 1990 Dear Mayor Morris: The Flood Insurance Study (FIS) and Flood Insurance Rate Map (FIRM) for the City of San Marcos, Texas, have been revised by this Letter of Map Revision (LOMR) to reflect a redelineation of the floodway for Purgatory Creek near the site of the Hays County Precinct No. 1 Vehicle Maintenance Building. This revision was requested by Mr. Stephen M. Jenkins, P.E., Director of Environ- ment and Engineering for the City of San Marcos, in an August 23, 1990 letter to the Federal Emergency Management Agency (FEMA) Region VI office, which was subsequently forwarded to our Headquarters office in Washington, D.C. Because the Vehicle Maintenance Building represents an encroachment within an overflow swale adjacent to Purgatory Creek, referred to as Purgatory Creek Diversion 1, FEMA sent you an October 30, 1990 letter listing all technical data submitted in support of this revision request and requesting that your community indicate in writing whether or not local or state floodplain management ordinances are more restrictive than the FEMA-designated floodway for Purgatory Creek. In a November 2, 1990 letter to FEMA, Mr. Jenkins verified that the FEMA-designated floodway on Purgatory Creek is the most stringent restriction on development along this stream. Based on this fact and the submitted technical information, ihis LOMR has been issued to reduce the width of the FEMA-designated floodway in the vicinity of the Vehicle Maintenance Building. Base (lOO-year) Flood Elevations and 100- and 500-year floodplain boundaries are not impacted by this LOMR. The revised area is shown on the enclosed annotated portions of the FIS and FIRM. This LOMR revises FIRM number 485505, panels 0009 D and 0010 D, and FIS text Table 2, entitled "Floodway Data." This revision is effective as of the date of this letter. However, a review of the determination made by this LOMR and any requests to alter this deter- mination should be made within 30 days. Any such requests must be based on scientific or technical data. The floodway is provided to your community as a tool to regulate floodplain development. Therefore, the floodway modifications described in this letter, while acceptable to FEMA, must also be acceptable to your community and adopted by appropriate community action as specified in Paragraph 60.3(d) of the NFIP regulations.