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<br />50. FIND1!mS..
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<br />'L BeB~ P~an of Improvement._ The District Engineer finus that
<br />the previously recommended phn ofi/llprovement should be modified to in.
<br />elude the Fountain Reservoir project in lieu of the Fountain Creek channel.
<br />ization element of the I'I,ebloLocal ProteetionProject. The modified plan
<br />of improvement..ould then consist of the Al'kansas River Flcodway, Brewster
<br />to Florence; tl'e "ountaln Reservcil'PI'oject; the Arklmsas RiverChannelha-
<br />ticn,PueblotoLasl\ni.mas;andthcFlor"nce, Portland,Pueblo(DryCreek),
<br />and La Junta local Protection Projects. The total proj eel' co~ ~s are ,~ti-
<br />mated to be $84,62S,OOC. A comparison of project costs and benefits is
<br />given in Table 14 undpr"j.;,ct lccations are shown on thellccolllpanying plate,
<br />rUIN OF IMPROVEMENT. :;~ve_"al n!t"rna.tive plans and supplemental measures
<br />for flcod -::ontro] "",l;,'c considel'ed. '!nese measures are based On "ontrol of
<br />land use whereas Hooci ~tr'KtuTes control tho water. Regulation of land
<br />use can be an effective l1le~J'~ yf assi.':Iting the public in avoIding damage.
<br />tlowever, the usc"ulness of the technique is limited co valuable highly
<br />developed areaS. Corrective '"casures including flood proofing, temporary
<br />orpennaneut evaciJatiouandurbllnredevelop11'lent in addition to floo dcon-
<br />trol works are "lOre effective in the latter. Consequently, Hood problems
<br />of the A"bnq~ I~iv\':r CIDmot be soL'Ied or :l.'Ioi:lcd by :::. pia.., that docs not
<br />inclu<lc flood control structures; but significant future losses could be
<br />avoided or mini~ized if regulatory measures were adopted.
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<br />h. Ad(liti~~l ~'nPironmental St~ie8.- The District Engineer also
<br />finds that thc- chUiliieliatio;;-pi-ojf;ct-between Pueblo and Las Mima.'; will
<br />reSlllt ill ecclogical "nd environment III changes, involving the replacement
<br />of" l:1eanae:r!.ng, ll)'<,,:~,,--,Lk,al;.y iJ,efiidcnt, natural river channel that is
<br />subject to periodic overflo~s, ~ith a straightened, mor~ efficient manmade
<br />ch~nel having Its overflows confi~"d to a leveed floodway, Construction
<br />ofthechallnelll.ud,r"ll1tedwo):"ks"i:laffectthephysicalappcar:mceand
<br />conditions of the xive:rwlly in the control of floods and salvage of ..ater,
<br />both af Whl~,h coul<1 <)":l1mc~' 01' depredate th" environment. Project studies
<br />~el:"e 1I0t of sufficient det:uJ_ t.o <let"mine all ch;fflndi~..t',on effects on
<br />the lI<1tur..1 biota cf 1..!." l'il'e:r"<~Y a~ it inte!'fllccs with man' s activities.
<br />~"rther in"t'sti;:ati,m ,,' ]".,-,edc,i e" ..en "xp1id_tly define ch:1llnclhaticll
<br />effects On the envi;coJ'Ill""t. 'n""se !I"VirOIlDu:lJltal st.udies would include an
<br />inventory and apprl.dsnJ cr the ,mvircnmen'tal re~O\lrces in the area affccted,
<br />anecclogical_cnvirc"",ent'" <lr.aly;;is ofcnnditiolls that..oul dprcvailwith
<br />and withotit the project, ~\1 as,sess.,cnt of delDands arid llee(ls for project
<br />products or r"sour~"s. ~d"n,;'j Ii ,:ation alld ,onsideration of "ltern<lt iv"s
<br />and recolllmcndation.5 conc'''''''i'\~ :l,amc. If 'the investigation 111dicat"-"s that
<br />rC'ledi:tl meas\Jros DrC Tiee,I"J t;;.alle"i...te "lrtajneffccts 0' 'l:heen"iron-
<br />mem:, due to the ch"'\lI~'I,Lat"o" project, rnea~ures to enhl<nce or preserve
<br />these unique ule",co':~ will b~ ~"nsidel'ed in the "tudy, including comments
<br />and views of ~eder~l, Stat" :\n.l Jocal agencies concern",l. The environmental
<br />studies outlincd ahove slloul<i be made prior to initlati,m of detail d" sign
<br />and conHruction
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