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Upon official approval of this report by the Colorado Water Con~ servation Soard, the areas describeo as being within the IOO-year flood (1% chance flood)* can be designated as flood haz~rd areas and their ySE regulated accordinSly by the local agencies. i , i I , , , Acknowledgements Purpose and Scope The assistance and cooperation of the belDw \istedageJlcies, fi rms, a"dargdnilations in addition to numerou, private citizens in sup plying infcrmatlon and data dre appreciated and gratefully acknowledged, Colorado Water Conservation Board The COunty of Fremont The City of Canon City The Canon City Daily Record The purpose of this study is to determine the potential area of flooding along the NE Canon drainage within the stu~y limits. The soeci- fi c locat ion of the study reach is shown i ~ Pl ate 1. The i nfonnat ion provided in this report will be used by the county and local agencies to regulate the land use of areas within the floodplain and thus redu ce future flQod d"",,,',,,~. 'The scope of the study includes the fallowing items; 1, Collect available basic data relevant to this study fro~ various sources including local, state ~nd feder~l age~(ies. 2. f'erfor.nhydrolo"ic analysis todeterm1ne the peak r"at" of runoff for 100-year recurrence irlterva 1 floDd for. th~ NE C~non jrolinage area ~t C~r.on City. 3, Perfo~m ~ydraul;c calcu1aticn5 ~it~in the ;tudy re~ch to cctermine the ~dter surface ele~ation5 and profiles fer 100- year recurrence interval flOOd, and delineate the lOO-ye~r floodplilin. 4. ldentify exi$ting conditions within the drainage area C~Jsing flooding problems. 5. Present a ',witten report. Mdppinq and $ur~eys i'.~r.iol ~ilULu,l"o~ioy 011\; Lu"tuur "'o~lii,,~ fo,' tili, ;,tudy w~l.t pro.ideJ ~y the City of C~non City and County of FrerKlnt. The mapping was prepared Ily PondercsJ Engi~eeri~g, Canon Ci ty, Color~do, in partnership I-li th Kucera ~nd Associatils. The mapping furni shed is at a scale of 1 "=200', wi tM contour intervdh of 2 feet. Inforrnatior.cn hydraulic paraneters, cross section data, drain age structures, and rehted field datcl was obtdi"ed by Greclt Jivide Engineering ana Surveying. Thp. ColorJ.do Water ConsenJtion 3o<Jrd ~erfor",~d fi~lJ s~rv~ys in Ole scmmer of 1980 to verify that the ",~pping was acceptable for this study in the floodplain areas. Cross s~ctio.~ d~ta from tile base mdPS w~s used in combination .lith field reconnaissance to cJlculate backwater at crainage structut~S, c~ute ~'Jtcr surfdce ele~dt iOils ~n<l profile~ and in the del ineation of tile 100- year flOOdplain. Related Flood Studies *1he term" 1% Chance Flood", "inte,.n'ediate Region~ 1 flood", ~nd HYJ- Ye~r FreQu~ncy f-1oad" can be u~ed 1ntcrch"ngeJb 1y as they Jre defined by the same ty~e of f load event. HClwever, for cons i ~ tency, wh~rever possible, the te"m "iOO-Yl'ar Flood" w111 be used in this re~ort. ,I"floodollir. information study entitled "Flood Hazard Ar.alyses for ;>ortions of Red Canyorl Oraw anu Tributaries, Fremont County, Colorado" '~as , .