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<br />and 50G-year frequeliLY fluuu ev"nb for' l>oth existir,g and futul'e ba5in
<br />
<br />~evel0pllier( con,"i tion5.
<br />
<br />~ijrau] iC5
<br />',:ater 5urface profiles were determine<l throughGut the study re achfGrthe
<br />
<br />pert inent information was used to prepare ~ reCOlTlT1endation for drainage,lay
<br />
<br />planning for the Spring Creek basin.
<br />
<br />2-year, lO-year, 25-year, 50-year, 100_yeJrand500_ycdrcventsforboth
<br />
<br />PreviousStudy~view
<br />A review of all existing information and data was campl eted for the Spring Cre~k
<br />
<br />pxi st ing bas i n OI'V" 1 opIT',pnt ~nd full ba~ i ~ development. i\ floodw<lY or
<br />
<br />stucyarea. Existing infor'matlon included a r'eview of sevpn previous floodre-
<br />
<br />high Mlud flood dlilnnel was identified for the lOO-year event with full
<br />
<br />latedstudies:
<br />
<br />basin development.
<br />
<br />Da~aQe Assessment
<br />Flood elevations for the2-year, 10-year',25-year, 50-year, 100-year and 5DO-
<br />year events were checked on the topographic mapping and structure slocated
<br />in each of these floodplains were identified. The depth of flooding at
<br />each of thes~ structures and a val uation of the property was used to esti-
<br />TlI'lte total dawages for each flood event. Average annual flooddarnageswere
<br />
<br />determined fronl this infonllation.
<br />
<br />~rovementAlt_~_iltive",-
<br />!ITIprovementplans were identified thilt would mitigate Or' allevia tethe
<br />
<br />flood hdlclrd, '1longSpring Creek.
<br />
<br />T'r" 1 i", i nil r;y' Ge~ ~ 9 r.
<br />
<br />Preliminarydesigl10 were prepared for each of the selected alter natives.
<br />
<br />Thp<;.' prpl i",inary <1esigns were preoared in sufficient detdil for cost esti~
<br />mating. A detailed cost estin',Jtew;)s conpleted for In ,'C<JnomiL analysis of
<br />
<br />I.
<br />
<br />"Flood Flow Investigations,: Spring Creek, FortCollinS,Colorado,
<br />prepared by R.'I. lord & Associates, Inc., dated Novedlcr, 1960.
<br />
<br />2.
<br />
<br />"Storm Drilinage Requin'ments Proposed Facilities," Fort Collins,
<br />Colorado, prepared byJ.T. Banner & Associates, Inc.,datedApr n,
<br />1967.
<br />
<br />3.
<br />
<br />"Report on Storm Water Drainaoe facilities," fort Collins, Co lorado,
<br />prep~t'ed by Rlack ~ VPi\tc~ Con5ultin'1 Engine~rs, dated June, 1971.
<br />
<br />4.
<br />
<br />Pre 1 imi na ry [);:>s i 'In R~port, Ro l1i\nd ~'. ~Iuore ,'>feroor iill Park," fort
<br />Collins, Colorado, prepared by Land and Watt;l' Consultilnts, In!:.,
<br />dated O~c~rnber, 1976.
<br />
<br />5.
<br />
<br />"lnte,'illl Flood 'lydrology Pe~ort For Spring Cr~\'k," Fort Coil i ns,
<br />Colorado, prepared by Resource Consultdnts, lnc., datedOctober,19n.
<br />
<br />6.
<br />
<br />"Fe<l.s ibi 1 i ty StJdies for t~e Diversion of Stor:1)-I^'ater R~noff ThroJqh
<br />1,.,.iUiltion Cd"dh from Mulb\".,.y Street to S~rinq Creek," fort Culli'I~,
<br />Colo;'ado. ",f'el-":H'~d by Re,earcil Con~ul tdnt~, lfle:, cia(.ed June, 1'179.
<br />
<br />7.
<br />
<br />"Pre1 iminary floud I"SUl'~n(", Study," F(}l,t Co11 ins, Colorado, ]!re~ared
<br />lJyGingeryAssociates,lnc. datedJanuary,1979.
<br />
<br />,\ SWllTIclry of these studies is present~d in <l separ'ate Spring Creek Report on fi l~
<br />
<br />[ .A'.
<br />.,""'''"',, ""'.1<;1:;.
<br />
<br />tio" Bnard.
<br />
<br />dt !r.e Ci ty of Fort Co] \ ins, Larilller County, and ~t the CClorJdQ '.,'ater Conser'va-
<br />
<br />eachaltor'nativc.
<br />
<br />Tile costs of improv~~r"mt alterrLativ,'s we"e co:npared '<lith the benefit5 of
<br />
<br />~aFL:!_T.1S dne Surj'Sl2..
<br />
<br />a i levidt in" potentia I flood ctdmd'leS and a benefi t :cost rat io ~nd other
<br />
<br />-GiJuura,'hi-: 'IJ"PJr\-;J fu'- t'l~, -.;tuev ,'/01' r"."iSfi{,J t'! t'I>' Cil'! -~f ~ur't I~ol.in:i.
<br />
<br />-~~ ~~~lr_' i, '''01'.':1'. J"~ :r'O ~-o"'_?Ur 'n~,,-,nal i;
<br />
<br />- 5 -
<br />
<br />f~l:t
<br />
<br />R'-"er~r':~ _,
<br />
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