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<br />FPR 96-425 <br /> <br />COLORADO WATER CONSERVATION BOARD <br />721 State Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br /> <br />May 14, 1996 <br /> <br />RES OL UTION <br /> <br />WHEREAS, the Federal Insurance Administration completed floodplain information <br />mapping entitled "Flood Hazard Boundary Map, Town of Coal Creek, Colorado, (Fremont <br />County)", dated August 15, 1975; and <br /> <br />WHEREAS, said mapping includes approximate floodplain delineations for the storm <br />and floodwater runoff channels and basins, but does not include hydrology infonnation for the <br />storm and floodwater runoff channels and basins, within the corporate limits of the Town of <br />Coal Creek, as they were on August 15, 1975; and <br /> <br />WHEREAS, a new floodplain information report entitled "Floodplain Information <br />Report, Town of Coal Creek, Colorado, Fremont County", dated April 1996 has been prepared <br />by the Colorado Water Conservation Board; and <br /> <br />WHEREAS, said new report includes the floodplain delineations of the Flood Hazard <br />Boundary Map dated August 15, 1975; and <br /> <br />WHEREAS, said new report dated April 1996 with the floodplain delineations for the <br />Town of Coal Creek includes approximate floodplain information for Coal Creek, three <br />unnamed tributaries to Coal Creek, and an unnamed subtributary to one of those tributaries to <br />Coal Creek; and <br /> <br />WHEREAS, the hydrology information for the approximate floodplain for Coal Creek <br />in said new report, with included mapping, has been estimated in accordance with the <br />Guidelinesfor Determining lOO-Year Flood Flowsfor Approximate Floodplains; and <br /> <br />WHEREAS, the l00-year flow for Coal Creek, which has a drainage area greater than or <br />equal to 1 square mile and less than or equal to 930 square miles, is estimated by utilizing the <br />regression equation for Arkansas River Basin Subregion Ark-3, Ql00 = l089.27(A)o.635, where <br />Ql00 is the lOO-year peak flow in cubic feet per second and A is the upstream (contributing) <br />drainage area in square miles; and <br /> <br />WHEREAS, the three unnamed tributaries to Coal Creek, and an unnamed subtributary <br />to one of those tributaries to Coal Creek have drainage areas less than 1 square mile; and <br />WHEREAS, a procedure for determining hydrology information in the Town of Coal Creek for <br />approximate floodplains of streams with drainage areas less than I square mile or greater than <br />