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<br />AREA STUDIED
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<br />2.1 Scope of Study
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<br />.2.2
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<br />This Flood Insuri,n,ce sW~y,gq...ers,.,tl1e,g,~g,f",the CillS' of Lo~gmcil:lt, ,
<br />Boulder County , Colorado, as Cl,esj'r:kbed in the st. VI!;,<i\in,>,C,Qjl\pft!,~'!1~,~;;~
<br />sive plan (Reference 5). The. areil,of study 'isshowl,l on the, vic~;",
<br />nity Map (Figure 1). : ~
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<br />,. In addition to St. Vrain Creek, the four tr-~butary l"treams inc;:luded.
<br />in the initial study were Dry Creek No. I, Lefthand: Creek, Sp'r ing ,. .
<br />Gulch (The Slough) ,and Loomille,r Basin. '
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<br />The limits of detailed study in thep1M.;:9fth~C'ity'bfL'6fi9niont
<br />were determined by FEMA after consul~ation, ~ith the: co~unity and
<br />the stu~y contractor.
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<br />The ar,eas studied by detailed metl1od:i.I were selectea;with priority,
<br />given to all known flood hazar~i:~i:eas and areas oClPrc.jected deve-,
<br />lopment or proposed construction',:"
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<br />Communi~y Description,
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<br />The City of Longmont islocated':in.northeastern Bo~lder CO\lnty,. in
<br />nor th-centr al Color ado, appr o~ima tely 38 miles nor bh. of DeJ:fver ,
<br />'Agriculture is the economic l;laseof'Longmont, ,:a,lthdUgh neathy
<br />Denver and Boulder have influenced the grbwthdf'rleW commer,cial,
<br />and industrial developm6'pt, This is re'neci:edin th,Lp9Pu1ation
<br />trends of Longmont. Th~'pbpulation 'figurestfotLbngmppl:"'for1950,
<br />1960, .1970, 1980, and projecteq for 1,990 are 8,0?9, 11,489, 23,209,
<br />42,942, and 68,154, respectively," ". ,
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<br />The climate is telRperate. Dailyav!!irage tejl\peratures. are65'!Ffor
<br />May to september ,and 370F fOr Octobejrto April. The,{lvera,ge'~'nn,\l;!.l
<br />precipitation is 12 incl1es for the city of Lc;ingmont"a:nd.neai:ty.17:;
<br />inches in the mountains of Boulder County, wi\than 'average, mon,thly i,
<br />rate ofl.5 inches from April to septetnbe-r-,: . ".'."
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<br />The citylies,within the st.'Vrain dreek Basih/headwater", exte'~d>"
<br />by way of North and South St. Vrain ,CreeJ<s in't;Q;:the ROc~Y:Mountairis
<br />up to the Continental Divide; Elevatibns rari9~,'from:4,90iL~eet J,~,,;
<br />Longmont to over 14,000 feet atLo~gs peak;"Tl'i~ wat~r of ,$t. VraIn
<br />Creek' has been appropriated f,or . municipal iand;iijl'(~g<ltion USjil1e; ....,
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<br />St, Vrain Cre~k is a continudus-f19Wing13tre'afti"~<l~"ijl!<li~!ith:e ,.ie, .
<br />east.ern slope of theContinenuaf ~il/'ide by;wayidi~N~tlianc:lisB4t1'l<
<br />St. Vrain Creeks. From the con~lU~ri,ce of'tlJ.es~cJ~~~~aj:'iLXOl1'Si';
<br />Colorado, St, Vrain Creek flOWSsQutheaster+Yithr,?i!C;jt!';~o.1'lgIl\9b:'I:'l".
<br />then northeasterly to the South Plat~~iRiv~.r~";;J:.eJ~!t-a~9:;i~feek,..D~Y;';
<br />Cree.k No. I, Spr ing'Gulch, and LoolRilleJ;' Bas;tit',foJ.;i)"tli'I,rllJ)" via:tn~".;
<br />Creek 'wi thin, the PMA~ . . \~:,_'-- ',' "--'~-, ..,,;.,,'.-;'~f3j(;:,J';r{(!r:->' .t:'-!~,-~.:,}'! \ ~:.~~i~A;:~:,.~:,~,:~:.~~;.:!
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