Laserfiche WebLink
<br />cLu.:JJ ~IIUAT 10'1 <br /> <br />Development in t~e FlOOd Plain <br />The population of Lyons expanded 36 pe~cent during the 1960's. <br />At the same ti~e there has been an Increase In number of nomes along <br />St. Vrain C~eek in the rural areaS. Oppo~tunlty lor expansion In Lyons <br />is 11mitoo due to the relatively steep sidehllls bordering t~ two <br />stream canyons that conve~ge there. Commercial expansion has been In <br />tile nature of supply houses and small businessos located out 01 the <br />llood plain. Futu~e commercial developments are mo~e likely to be to <br />the east 01 Lyons wne~e tll9 land ;s 1 latte~. There wI II contime to <br />b9 p~essure to build In tne llood plain at Lyons due to these space <br />~est~ietions plus the att~action of living nea~ the stream. hble 2 <br />lists population t~ends fo~ Lyons <lnd 6ould9r County from 1950 to 1970 <br />according to U. S. Census 8tJ~e<lu figures. <br /> <br />Sourco~ of Uah arrd RecO~dS <br />Tne J. S. Geologlc~1 Survuv ",aint<llns a sud<lce WJhlr recorder <br />ga';" on St. ',rain :::re<~k at Lyons. Tr.e ~i!~e h lociltod 1ownstrrN'" Iron' <br />tne conf IJonGe 01 ~.orth and SOJ"l"., St. 'Vrai n CreekS and "as J dr-ai nage <br />drea 01 219 s~uare ".; I us. Records are avalla~ Ie for AU~"5t IS87 to <br />Septerr.uer 1391 and fr~ Ju~c 1395 to the present. <br /> <br />'l.~ter i J I was obTa i ned trom "CNer eli I I and Va I <l" ~y lidrol c H. <br />:lJ nn i nq, and 'J. S. :::;eo I OJ i ca I Survey '.;ater Supp I y Pil~er 997, "F I oo-j, <br />in Colorado." <br /> <br />19:'0 <br />1960 <br />1970 <br /> <br />Lyons <br />"" <br />706 <br />9>8 <br /> <br />80~ I der COUnTY <br />48,296 <br />74,254 <br />i31,889 <br /> <br />Flood~j nreJS in this report ere rlotteu on rO'~odUGt;ons of <br />,00.$.C.S. a"ri~ I photogrnphs ",~Je in J~ Iy 1'169. rl<lh i led topOoJrapM ie <br />napoin9 .:J~d Cro~5 5ection sJrvcys w're. o,'ovid"d by t.~e Ur~.'a~ [)r~inaw' <br />anJFloodCQnrrol ='lstrict,tneCltyollofl>Jr1ont,anJSce;IJer'County, <br />by coopera"tiv8Jgre<..>ment. ThcsewureussJtoCOOl?'JtellooaprofiIEls <br />emu I IOOded ".,,~ ouTI i "~~. <br /> <br />Tilblo 2 <br />POPULATIOOTRENDS <br /> <br />y,,~r <br /> <br />Flood Season ind FlOod ChMa:tGri~t;cs <br />FIQO(j~ ii< the study r"'iKi1 01 ~T. Vr;]i~ Crec~ USJ<::llv Gte". <br />"ur i rv, toO.. n..r i oc ,,:~V '1hrOJ'lh 5"0 ter"~"r. ,'!ocln ~d i" snQ\,'''~ I tin :ai <br />c1rlJ June ccntri bu hj~ sign i r icant runoff wt serious flood In~ (j0<\~ 'lot <br />occ~r unl05S r.o i nl" II .-,ceornp+, ics T:le 500''''le I t. Po,'k 1 looni ng dt <br />~'1oc':; "" II '.J~""! I\, OCC'lr within a lew hour', ;lft~r ~ ~i"gl" r~inbi I <br />"V"P~. FI()O~ir;,.I;~ fJ:.:nanlly ,1f 5'lcrt de;r~ti()n bUT ,""y b,> pr'olom.IBd <br />5i'J~ i I iCJ"tl'y' by ';"O'~,"(>I t r"nott. <br /> <br />" <br /> <br />7 <br />