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<br />LIST OF TI\Bl.ES <br /> <br />FLOOOPLAIN INroRMATICN REPORT <br />COLORAOO RIVER AND PARAOIUTE CREEK <br />PARAOll!I'E, COLORJ\DO <br /> <br /> - <br />l. Historic Floods - Parachute Creek 7 <br />2. Flood Discharges 8 <br />3. Comparison of HEC-2 <od,) Rmmlts l5 i <br />,. Floodplain Reference Data -Parachute Creek 18 <br />5. FlOodpl.1in Reference Dat<l - Color<ldo River 20 <br /> <br />INTroDUCTION <br /> <br /> LIST OF PIGURES <br /> Page <br />L R",gionalLocationMap 5 <br />2. Railroad Bridge Cross-SCctions II <br />3. Cross-s",ctions 242 and 243 12 <br />,. Cro!:'s section 232, Paradmte Creek 21 <br />5. Cross section 236, Parachute Creek 22 <br />6. Cram:; =tion 243, Parachutc Creek 23 <br />7. Cross section 228, Colorado River 24 <br />,- cross section 286, COlorado River 25 <br />9. Profile, Colorado River 26 <br />10. Profile, Colorado River 27 <br />)1. Profile, Colorado River (deleted) 28 <br />12. Profile, Parachute Creek 29 <br />.. <'(Oru"" <',Ha,;h....te ^ ' .. <br />u. ...r,"",,, ," <br /> <br />Th", Town of Parachute is located in western Garfield County along the <br />Colorado River. Incorporated in 1908 as Grand Valley, the town's natl'l'O was <br />changed in 1981 to Parachute when oil shale development was in rapid progress. <br />In order to properly regulate deve10pnent in the area, aoo to aid in <br />administration of the National Flood Insurance Program (NFl?), the towns of <br />DeBeque and Parachute, and Garfield and Mesa Counti",s began an analysis of the <br />local floodplains to determine the extent of existing and pOtential flood <br />hazards in 1982. This work. was carried out under the ilUspiCQs of the Colorado <br />Water Conservation Board (CWCB). <br /> <br />In August 1985, the U. S. D. A. SOU Conservation Service (SCS) published a <br />repo~t of the detailed analysis of Pa~achute Creek in the vicinity of Parachute, <br />and Roan C~eek in th", vicinity of DeBeque, COlorado (reference 2). The SCS <br />conducted the technical studies and iXE'Pi'red the repart "ccording to a Plan of <br />Work ooh.r","n the SCS arod a;\cB datoo De<.:",mt><=~, 1982. <br /> <br />In December 1986, the Town of Parachute requested J. E. Langford and <br />Associates to check. certain cross sections used in the floodplain analysis of <br />Parachute Creek arod to review the results of t.'le teChnical studies perf orrrroby <br />the SCS. The result of the review was a recorrrrendation to the Town that the <br />floodplain ,,"alysis of Pardchute Creek within the Town limits btJ mxlified to <br />incorporate n_ tOflO'Jrapnic data and diUf>rf>nt_ i1!\!'1umptions fP<J>;lrding hydnoulic <br />modelling of flood discharges along Parachute Creek. <br /> <br />f\!rpose and Scope: <br /> <br />This report has been prerared at the request of t'le Town of ~arachute to <br />present t~e reviSed engineering ~~ta and assumptions used in the teChnical <br />analysis of Parachute Creek and to dooJment the modifications in t.~e floodplain <br /> <br />1 <br />