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<br />along any storm or floodwater runoff channel or basin only after designation and approval by <br />the Colorado Water Conservation Board; and <br /> <br />WHEREAS, Section 37-60-106(l)(c), Colorado Revised Statutes, directs the Colorado <br />Water Conservation Board to designate and approve storm or floodwater runoff channels or <br />basins and to make such designations available to legislative bodies of local jurisdictions; and <br /> <br />WHEREAS, the information in said new report with included mapping for said stream <br />reaches in Prowers County, which have drainage areas greater than 0.5 square miles or less than <br />1125 square miles, meets all of the requirements for approximate information listed under the <br />Board's "Rules and Regulations for the Designation and Approval of Floodplains and of Storm <br />or Floodwater Runoff Channels in Colorado" (2 CCR 408-1); and <br /> <br />WHEREAS, Prowers County has been notified herein that the streams that have <br />drainage areas less than 0.5 square miles or greater than 1125 square miles, lakes, ponds, local <br />drainage areas, and overflows from irrigation ditches and canals may not be designated as <br />approximate floodplain information without a procedure for estimating 100-year peak flows, <br />and the local government understands and agrees that a detailed hydrologic and hydraulic study <br />should be performed by a professional engineer and submitted by the developer or the <br />development proponent prior to any floodplain development in those cases; and <br /> <br />WHEREAS, Colonido Water Conservation Board has determined that the hydrologic <br />methodology developed in the Guidelines for Detennining 100.Year Flood Flows for <br />Approximate Floodplains is appropriate. for designation and approval of approximate <br />floodplain information and for use in simple floodplain analyses for development such as open <br />space, agriculture, farm bridges, pole barns and individual single residential structures, but that <br />the methodology is not appropriate for development involving residential subdivisions greater <br />than 50 lots or occuning on sites greater than 5 acres, commercial construction, industrial <br />construction, construction of public transportation facilities or construction of flood control <br />activities; and <br /> <br />NOW, THEREFORE, BE IT RESOLVED by the Colorado Water Conservation Board <br />in regular meeting assembled in Denver, Colorado, this 8th day of July, 1996, that it does hereby <br />designate and approve as storm or floodwater runoff channels or basins those streams within <br />Prowers County, as listed in Table 2, described by approximate floodplain information in said <br />new report dated June 1996, that meet the criteria for the regression equation for Arkansas River <br />Basin Subregion Ark-I, QUIO = 1564.98 * (A)0539, as set forth in the Guidelines for <br />Detennining 100- Year Flood Flows for Approximate Floodplains, or that meet the criteria as <br />set forth in the USGS publication "Rainfall-Runoff Modeling and Regional Flood <br />Characteristics of Small Rural Watersheds in the Arkansas River Basin in Colorado", contingent <br />upon the understanding that Prowers County will regulate the approximate floodplains on a <br />case-by-case basis subject to a detailed hydrologic and hydraulic analysis performed by a <br />professional engineer, in accordance with the detenninations of the Colorado Water <br /> <br />5 <br />