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<br />road embankments are so Shallow that thea/llOunt of obstruction Is <br />Insignificant. Most of the rood embankments are only moderately <br />high producing about 2 feet of difference between the upstream and <br />downstream water surface, <br />The Irrigation canals whiCh cross each creek also obstruct <br />the flows In vdrylng degrees depending upon the height of the canal <br />embankments and the method of crossing the creek. The effects of the <br />irrigation c<lnals <Ire also Shown graphically on the "Profile" plates <br />for each stream. <br /> <br />ownedbyConsolldatedMutu<lll'laterComp<lny, Is located at West 27th <br />Ave. near the center of tho study reach, Although this reservoir Is <br />for water storage It does provide some reductions In the floods pass- <br />Ing through the reservoir. <br />The Lena Gulch channel ranges from 2 to 13 feet deep and <br />has top widths ranging trom 15 to 125 feet wide. At <I number of <br />locatIons. a small low-flow channel at>out 2 feet deep and 10 feet <br />wide Is located within the larger channel. The channel Iscontlned <br />to a .00 foot long underground conduIt In the vicinity of Moore St. <br />Channel bed slopes l"I"'ge from 200 feet per mile nwr the upstream <br />Ilmltotthestudyre<lchto.Ofeetpermllenearthemouth. The <br />channel bed drops at an average rate of 82 feet per mile, <br /> <br />Large groups of buildings on the flood plain also obstruct <br />flood flows. Slncethebulldlngsgenerallyextendalongsomeleng-th <br />of the stream, the effect Is a genoral rise In tho flood depths. <br />The underground storm sewor downstream of Kipling Street, <br />on Van Blbber Creek, obstructs the flows of large floods. This storm <br />sewer wll I c<lrry less than 10 percent of the IntermedIate Regional <br />Flood. The remaining 90 percent of the Intermediate Regional Flood <br />Ol\\Jst flow overland through the resIdential and corm;erclal areas down- <br />stream of Kipling Street. <br /> <br />LENA GULCH - GROUP 2 <br /> <br /> <br />StreamandvalleyCharacterJstlcs <br />Lena Gulch Is a right bank tributary at Clear Creek <br />draining <I f2.2-square mile ar-ea west of Oenver. L'lnaGulchbeglns <br />In the foothills area about 3mlles south at Golden. From Its <br />source, -the creek flOws northadsterly p<lsslng through rural r,olden <br />and the communities of Pleasant VIew, Applewood, Edgemont, and <br />WhoatrTdge. Thadrillnagebasln Is 10mlles 10,,!<<lnd3.5mileswlde <br />at its widest point. <br />The portion of Lena Gulch studied in this report e~tAnds <br />from the mouth 8.1 miles upstream. Urbanization has occurred at <br />Intervals throughout the entire study r~ch. There are a number of <br />street crossings and Channel alterations. Maol~ Grove Reservoir <br /> <br />Lena GulCh <br />LOOkIng downstream from Orion Street <br /> <br />I. 15 <br />