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<br />PREFACE <br /> <br />The pU1"pOse of this :r-eport is to prel~ent infomation on the flood <br />hazard along the ColoradO River and Rifle, GOvernment. and Hubbard <br />GuZch Cl'eeks in the vicinity of RifZe. CoZol'adO. In generaZ. the study <br />area comprises the flood plains of these streams within the corporate <br />limits of Rifle. Records indicate that damaging floods have oCC!U2'red <br />in the study area 11 times since 1914 01' about once every 6 years. <br />RifZe Gap Dam, a singZe purpose i1'1'igation pl'oject on Rifle Creek com- <br />pleted by the U.S. Bureau of Reclamation. in. 196? provides a high <br />degree of incidental flood protection to the area downstream, but <br />flood damage from Rifle Creek and its tributaries may still ocaw:'. <br /> <br />Studies made for this l'epol't show that floods larger than those <br />of the past oould ocma' in the future in the study area. This report <br />contains infonnation on past floods. and maps. pl'ofites. and crross <br />sections that indicate the approximate extent and depth of inundation <br />fl'om large floods that can reasonabll./ be expected to occ!u2' in the <br />future. For purposes of this report, these floods have been designated <br />as the Intel'mediate Regional and Standrn'd Project FZoods. <br /> <br />This report was prepared at the request of the city of Rifle with <br />the indorsement of the Colorado Water Conservation Board, under the <br />continuing authority provided the Corps of Engineers in Section 206 of <br />the 1960 Flood Control Act (PUblic La.) 86-645), as amended by the 1966 <br />and 1970 Flood Control Acts. It is intended that the report be used by <br />the city of Rifle. Garfield County, and other flood plain. users. in <br />developing and using flood plain areas in such a way that flood hazards <br />and future flood damages are minimized. The report provides them with <br />a basis for further study and plannit1{1 for optimwrr use and development <br />of flood prone a:r>eas through zoning and subdivision regulations, construc- <br />tion of flood control projects, or by a combination of these and other <br /> <br />, <br /> <br />i <br /> <br />i <br />j <br />4 <br /> <br />f <br />