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<br />: __ _. .~, ,........ _'1> <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />.1 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />,I <br />! <br /> <br />I <br />I <br />I <br /> <br />G~awth in the West Pork basin itself will be pr~fily reside.ttJ~. <br /> <br />T~ lower basin will consist of high density stagle f~ly units for <br /> <br /> <br />t~ ~st part. The upper two-thirds of the besin will cQPtaio single <br /> <br /> <br />f~ly units aD larsa tracts. <br /> <br />. <br />, <br /> <br />, MUOR DRAINAGE pLANNING <br />Tha major liratnage system in tile basin is Sat14 C..-lt Wast rorlt, TlIlI <br /> <br />syste~ must provide for runoff from urbanized er... and carry ,..k <br />flood discherles. The major draJnage systelll is t"- keystOll8 to '004 <br />urbaq dratNlse. A well planned major systll1ll e8l\ protact fr_ propllr~ <br /> <br />d8lllllse and loss of life, enhance environmental va~ues, alUl r8l!UC:II o~ <br /> <br />1I11lllinate tl1l1 need for unclergroumi storm sewers, This .tudy procee411 <br /> <br />on that t>asi.. <br /> <br />Sand Creek ilt II 4ry creek bed IIIDBt of the YMr; l1Q111lDt', !furi.., ,tel.... <br /> <br />IIf SO year, 100 year, or greater freqQtlncie., it elinlll. eONll4.r.p~ <br /> <br />q~tlties. As urbanization increases, the.e qQtlntitle. will lqcr.a.1I <br /> <br />4nd IlIUIt b. clltl8i4ered In the plaPlling, <br /> <br />lialUl Crllek III itlt JlBtl1tal atate In the lower baslp is aq aUuvUl <br />channel. Iq thilt _turd stlite it has a ~veable sand h.d. Repell4111l <br />lJPOll the flow, the bed matertal*wUl ~ve baclt Ilnd forth in tM fom <br /> <br />of ripples, 4\111es, and sand waves. In this uncontrolled statll, the <br /> <br />creek ,resent. . hazard to the inevitable development of roads, .trqc- <br /> <br />tures and lither facilities. Without some delrell pf chaaneliaation, it <br /> <br />is difficult to predict the capacity or the centerline 4uriQl peak <br /> <br />IItl.lnlll. LUII~rl.ll. Ij..wlI""r, ~..Il ll~ll."v~ .illl f"IIOohi.llli \l"tI...Hli; <br /> <br />. <br /> <br />2 <br /> <br />. <br />, <br /> <br />" <br /> <br />';, <br /> <br />'. <br /> <br />'.ry' <br /> <br />.1' . <br />~4"'_ <br /> <br />, ~.' (. , <br /> <br />',. <br />'. <br /> <br />. '.~~ <br /> <br />" ' <br /> <br />. " <br /> <br />, '~ . <br /> <br />: fl,. <br /> <br />"'f <br /> <br />, <br /> <br />j , <br /> <br />" <br /> <br />...... <br />.... , <br /> <br />" <br /> <br />..' <br />.' 'F' <br />,t,~ :: <br />