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<br />WHEREAS, the use of the U.S. Geological Survey publication, Techniques For <br />Estimating Regional Flood Characteristics of Small Rural Watersheds in the Plains Region of <br />Eastern Colorado, for stream reaches with drainage basins less than 25 square miles but greater <br />than one-half (0.5) square mile for Arkansas River Basin Subregion Ark-I, was endorsed by the <br />Guidelines for Determining IOO- Year Flood Flows for Approxi11U1le Floodplains; and <br /> <br />WHEREAS, the drainage area for Unnamed Tributary to Big Sandy Creek is greater than <br />the lower limit, one-half (0.5) square mile, for the use of the u.S. Geological Survey publication, <br />Techniques For Estimating Regional Flood Characteristics of Small Rural Watersheds in the <br />Plains Region of Eastern Colorado; and <br /> <br />WHEREAS, the hydrology in said new report for the Unnamed Tributary to Big Sandy <br />Creek has been estimated using the appropriate regression equations in accordance with the U.S. <br />Geological Survey publication, Techniques For Estimating Regional Flood Characteristics of <br />Small Rural Watersheds in the Plains Region of Eastern Colorado; and <br /> <br />WHEREAS, the Colorado Water Conservation Board is taking action under the provisions <br />set forth in 2 CCR 408-1 Rule 9.D.2. (Board Initiative) and Rarnah has been notified and their <br />comments have been considered in this resolution; and <br /> <br />WHEREAS, Section 37-60-106(I)(c), Colorado Revised Statutes, requires the Colorado <br />Water Conservation Board to assist in the prevention of floods and flood damages therefrom; and <br /> <br />WHEREAS, Sections 31-23-301 and 30-Z8-111, Colorado Revised Statutes, provide that <br />legislative bodies of local jurisdictions may provide zoning regulations for land uses on or along <br />any storm or floodwater runoff channel or basin only after designation and approval by the <br />Colorado Water Conservation Board; and <br /> <br />WHEREAS, Section 37-60-106(1)(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 for Big Sandy Creek and Unnamed <br />Tributary to Big Sandy Creek meets all of the requirements for approximate floodplain <br />information listed under the Board's "Rules and Regulations for the Designation and Approval <br />of Floodplains and of Storm or Floodwater Runoff Channels in Colorado" (2 CCR 408-1); <br /> <br />WHEREAS, the Colorado Water Conservation Board has determined that the hydrologic <br />methodology developed in the Guidelines for Determining IOO-Year Flood Flows for <br />Approxi11U1le Floodplains and the methodology. developed in the U.S. Geological Survey <br />publication, Techniques For Estimating Regional Flood Characteristics of Small Rural <br />Watersheds in the Plains Region of Eastern Colorado are appropriate for designation and <br />approval of approximate floodplain information and for use in simple floodplain analyses for <br /> <br />2 <br />