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<br />Introduction <br />A previous study ot this area WlIS Included In a report published In <br />J~nullry 1966 liS Flood PllIln lntormatlon Report, Metropolltlln Region, <br />oen""r, Colorlldo, ~olume III, Belir IInd Clellr Creeks. Hydrologic and <br />hydrlluflcstudlesmadelnconjunctlonwlththalluthor1zed6ellrCreek <br />lake project, which Included the hydrologic experience ot the 1965 <br />flood,hll""resultedlnllreylseddeflnltlonofttJefloodpotentllll <br />In ttJe study rellch. This report, req~sted by the Colorlldo WlIter <br />COnserYlltlon BelIrd, presents the results of the reylsed work, pllrtlc- <br />ulllrly liS to chllnged flood stllgeS lInd redefined tlooded lIrellS under <br />conditions ot de""lopment In 1970. The Inter~dlate Regional IInd Stllnd- <br />IIrd Project FlOOds, defined In the GIOSSllry, lire used to Illustrate the <br />flood hllzard potential. These two floods shOuld be gl\l9n approprlllte <br />consideration In plllnnlng for safety of deyelopments In the flood plllln. <br />FlOOded area maps show the IIpproxlmate arells that would be flooded <br />under current conditions by the two potential flOOdS. Profiles IndlCllte <br />the depths of potential floods rellltlye to the strell~ed IInd to bridges, <br />IInd show the elevlltlons thllt represent the flood water surface across <br />the..idthofthevlIlley. Cross sections show relatl"" ground IInd flood <br />le""ls ecross the valley lit selected points along the stream. <br />The use to WhiCh flood plllln Infor~tlon will be put, such liS zoning <br />or o1"har ragulatlons, Is the responsibility ot IOCIlI !Iuthorltles. The <br />lnfori'Mtloo si>ron In "this report does not I,.,ply MY Federel Inter'!Ost <br />or authority to zone or regulate usa of the flood pla!ns, nor should <br />It be construed liS obligating the Govern~nt to In\l9stlgate, construct <br />or....lntlllnllnylllcllltydlscussedlnthereport. The Orreha Olstrlct, <br />Corps of Engineers ..Ill provide, upon request, technical assistance <br />to Federal, State ~nd loclll lIgencles In the Interpretat!on IInd use of <br />the Information contained In this report. A plI~hlet "Guidelines for <br />Reducing Flood OlIl11llges," lInd 1I booklet "Introduction to Flood Proofing" <br />ClInbesupplled. <br /> <br />:sG mi les long IInd hilS ~ ,""xi mum width of IIbout 13 mi les. Approximately <br />90percentofthebllsin Is in the mountaTns and the remllinder of the <br />basin is in the foothills ana high plains region. Turkey Creek is ~ <br />major tributary th~t drains 52 square mi !es IInd enters Bear Creek IIbout <br />two miles downstrellm from ~rrlson. ~,mIlP of Bear Creek bllsin is on <br />plate I. <br />The study rellch for this report extends 7.5 miles from the mouth <br />01 8e~r Creek to about 1.8 mile upstream from South Kip I ing Stroot. <br />Bear Creek hilS been altered by relOClltion, straightenin~. or en- <br />IlIrgement throughout the downstream half of the study raach. Ripr~p <br />has been used extensIvely to combat the erosive forces of Bear Creek <br />floods. Upstream from W~dsworth Boulevard the strellrn is in Its nllturlll <br />state except for gravel mining OPerations IInd averages 80 feet w1de, <br />7 feetdeep,an<lslopas7.2 leot per thOUSl.ln<l. Downstre'llmfromOla<lS- <br />worth the channel averllges 80 feet wide, 9 faet deep, IInd Slopes 5.3 <br />feet per thousllnd. Chllnnel conditions are Tllustrate<lby the following <br />photogrllphs taken in 1970. <br /> <br />Basin IInd Strellm Chllrllcferlstlcs <br />[lellrCreek<lrlllns261 sQullre rnlles and Joins the SOuth Pllltte Rl""r <br />lit Sheridlln, ColoradO. a southwest suburb of Denver. The basin 15 about <br /> <br />2 <br />