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aotre S sTerm009!l .Xffi1J,S OOO'Iclf NDISIT!l r'iO'IiilU .• l ~·· l ... ' 1 •· ., -U.~ITED STATES .. , '•, .... ~' I . ,. .• ·-·~-. • .. O~~~~T~E~.~·:.-~~ THE_ :'lNT-~RtoR -~-.. SURE~. ·OF·.RECL.:AMATION . • t-.;.-~~--~·.:·,_ -.~fOM~lSSt~NE.R'S '?FFIC£ . . ~~~· ~3 f f:?£riVE:R FEOER~L Ct:_NTE.R ',. ;:'i?; •. _ • -~ DE ... VEa ·. ~~ COLORADO ., . I ' i . . ' I,.-~ .Jlreet:~i.~· t;.l&'t \fOl :·'!•.:-i~ thtt'i.~t t'r~:l Qf :t.":l.i~ ~tittd:;,: foe:tt~ r ~b~ 'p:~~~~ .w:,l _f t lnlH l U1 • ~tOiXl ~t~. A ~(.!:J{,) ... fq0t hlgh. d~~ bad t..~· oo~utlt:ty--o! ut:ot.i ~:-o·n:.r:-_ ;.j JOtc .. :r.:~ ~.e~~~!'~t-~ .tri··!:n:keh t. lt1...""tft· ~rqtoi.J.':.~~ ~~ll\~ 8'~~n;, · ~aciid be ~tilh(!~. ·1n ;:~~;·U~P-~ _:·'th<: 1rif'-tnri·~~JP ~3.0\.fil, F:lii J.. • .!'<!ils2.t-l~ t.o ·~.q.int;.~ th~.~s~iJ.l~1;:r. · · :; · ea;>~!.t\-y~o ':'!1~-~'1-0d ~.t:.~~:. -~.~ .·~'lfai-~~.;-; .,t-.1~ -i~::~~e.rt .vohr:.: -~t~r-fnati~. , l t.-1 ~ ~~U<JSr,:~ . '!.r~ det.u:i ~.:.: :in tlr:.e Rt~t.i/'. . . · · ' · .=. .. • "' • .;.· ' . "" •1;To~ lt5•ist .1fi 1:b~ r.ri~~:~t:ic:! ~.an 1!4'~ i}est:gn f-10011 ~j~. ut ti~~ lA'~ .d:&te~ D;J.tt~b ·fiJl• t-= -·;tt-ill~y ~·ctio.-.t.e:s ~t t,"'J.~ ~t .,. , Drfl'\ r-tte-1: ~i..~>i~'~1:v··i'fl_~ th~t.at.·l~~ w~ -~~·d!r~r-Pte-· , 1:~ Q.il:f!Y\t~ :1Ji~~~ _b.~.-~~lJ;-~··t~. thtt v,to1~~. ot Denal~ ~ -~1.te . .; .. ,. .• • ., .. .. ... ~ ( • •. 4 • r .i: '. • ~ 1, il , • . . \ \ \ i \ '· ' 1 ,·_ \ \ \ -- :a~tt-n* ~~~.rtt ~ti~ ~;.,..,..;r. t' . ~~<i~...__.-~~~~'~4- A l"C<i!~t ·t-.bst !.,'qf'l~ d~11.ftn ~.OOi iitl .. i!U.~ To~-tl~ ~rl.l C~~JOO ih'O{}~-t 'b~ :pl'0J;~'Xt ~"l t.1la D~~~ Qtti~ ~ ~~ Ltt ·~ l>i~trt<tt; J~~~i(i; 1~-i'rtwi' ~ oot~~;r --~~ :%1,)5f} .. ~-.... k~~1-~ li,,;,..r;-·f,t'fl 61,.,...,.;1; '1:-o.-....~~..,.... ~-... -~-·--... -,.; -il.rn-lf;!.,, l"·"u. .. /rr .,..,..,..r.o. ~'*~4'-r~~.,,..,.vU -.,:,.~~w~-..;;~u. .J::.., .. u;.~...c!t ~..4..~~~ :.£. ..... ~!; ~ ~~-~t.~~ ~ic~~ 'i~!Q .... ~ ~U;:i\~~"~N:~~~ nf !J.'O;.iX<O ari'e ~~i. ti 1~ t:hl";-;~)1 ~~m.~ ~"Clt~~ o;<; S,f.R(~$(,1:30 ~~""i'&Ylt ~$ t_;~.;A:*FKi £1T;.~jld!!~ll,j· C!i t;J.~i;i{ff.; l,., .t.J~~ -~~;:r0~~1~~~-ft f·ctt; ~e ~ll if't'#~~W,ff.~i,_gn_ ~t t'~X~Q;j.~-Utd$EJ~~~ ~'~Jt<;i.n;tl.~~ f~ ~ll ~-'l ~itll'i<i tb. ~ l~COlri>'J~-.:,trl>i~'t't tl\~t ~¢~:')'!~$:>~ ~~;r~~W11 ot dh~1l'S:l.ct1 ~'tft;tl~ir~cr:xrt'tl tiu.r:tnc~ cot.mt&'i . .;~rtioa b'$· ~Jl4~ att tl\e it@ Y>~ft.:!'$ ot -:roo;;r..:-o.ed. :fl.t;tit ~·t th~ Diz.tl?..li g-t:~3;'tt 1 l:J5[j Zlin~'t 1957" Mt1."di11\~'1 t'!.illf:!Jl&l"n-0 'tt'e$1 lfi 1 f'()() . ~~; wi.tJ1 ~u~~.:'IJ.l;;d. :flmr Q2 8~000-to l.01000 cfa (t;~Zfi.~ tlta m.-o.u~ ¢: J~,. Jv.ly~o -~ A:~~· ~ ~ ... _--.'l'>_' ''~,f?-.k'\::,~_-f.!,;., . .!t'"""'' T$,!-.n:rl!l ;j~-{·~~1.f~--~----_,_ .... ~ ... ~-... ~t-f...,...& A .J>r:i.4L~W ~ ~~~.,'¥.' ,w-~t.~~-· ~"~~ .n.L~w ~~~~~-~~~ -~ @V&·~~ ~~~ ~te;t1oo Sf.t Gold C:;.-;~~ 1~ Pl''>tt-s·~tlt~ oo P~tc 2.. 'Ih~ C:t..'r'l;l,.f.l!~~e -~,a t\bav-~ ·1~:1 D-Sill-~l,'t!%; ;pl-~ti~:t$red m~ 1..,2130 ittlUSN l!~£i 1 ~· t1h:Vml~ i~ 1<1~-flticrtl.-o:~ ~'t~ fl:t~:;;·~~J. £}5!'.i!ir4..~S :.:~~t::~un. ~ttr< Dt~~i., lmieb. i~ u~tre0-o."ll ~ tittt der1~ a.ite~, i$ lJ.'>...-~ttGB... At"'iii!:rr't.icr.<l i!.Z ~~ .. .11ea t{} tt-1~ ~i:0r ~wM f.XhO'I~:n ~ thl~ 1~!ll:U1vci otr~ c~lmP~-~ indic~t.{1!d,o; ~.J.J.~ ~ ~~ P~.P~~d !:'m~ ~~ Of: ~.t'..:.\G 1/2501 Ot/0 eiu,ted. if~ puhll.Gl~.d by ~ U, s~ G~olo-3ie~.1 £h:~~~y. . E't~1lr$ t.t., l~ofl (h>cr~ ~t:l':;:t -w. J.:1', Dt'lr:tend t4 .. lih!s cffl~ 1!!$!>'l1~ a, t1.~M~ inttp·~crt1o'!'l 'ti".:ip Cif t<'l1{'i t~e;r-1.1. Cw.ycr-it !'roj>ft{;"t 'h'"ltt~~ .in. tif~t~r 195·\1. :£l;m:t;~nt. ~~.::.<:tze::~-!$ :er~ tooir tr~val. l'\)!f".::Jl't d~~ C~t~bC,t%." 26 j l$f5~ I ~ Wl0t.ed bal.O'Ii%. J J ] I 'j 'l J ]' J J J J J ] J ] '] J ] 'l J J -L ------- .u::ii1.c ~ou..."'rie ef tlte S;..witna. lUve:r x"tr.noff ~t this ·t;ime: of '!Je&.r appe~ to 1Ja fran1. G:t'OUlltl1Ja:t~r-P..nd scr;1e gl~eial !:1~~l;t .• l\pp..·'!.rt.Y!ltly; d.Rrll:JS ,Jrtl.Y ~"'11'1 Aw:,t-zt, the :Prin.ci}fH.1 ~o>n."'ce 1~ glacier t~elt;, Outside O':i: fu;,; ~c.aiil.£1" moGt of' the ~'U:'$~ :l~ ve1:y fJ..at, with hvntL.~ o£ lakes causerl by d.c'!?m£Hiiou5 .lef't w; the g:J.&"!iera receded.. CCI'Je:t' corui~ists a2 m:usi~eg (r:too.a aui.l bl''uah nl""' ~~el')· .. ~~1 t~no.'l.-a (mo!i1S n;nd bt"'...toh· '\Jit~b.o-;rt rn1ell ~rater}~ or ... ·~ ' . ., ... f;')(),:;n~ J;m:.-a,ll S:pl"'Ltce ttt."ll."t he'illl.ool;.; Y>tootly v.ndel" 20 feet .tall~ ~J:J.{i t'itk"ll~ birch tre-es, also mostly under 20 feet tall.. ~"l;r..itra m.'ld lll"lllilk.eg hav-e :tlv~ ca;-jf~ity to &.c·tt-un l>a.:infflll or snor.rt'~;l·t l'tluo:t'i', Cf.UtOL!g e..'\.'tl~e:-.,'tely long lug tir~s., Ct'n the ar.;re~ly high ~:i~~vatiOti.l!i'11 the a:.:•ea. :La either bm""e rock, !3Cfn7!~ of mxiclt i~ sou:rii ~~ll{l, so:.<n.e in a hi(":',!~.l:r fl"tlet.urod s~-:t.te 1 o:r is coveTh~ ·ny &"low aril. gl.acle:r•s.. I<1.any of' t;he :.ur_.,l:x·ua · lo.ck sl!.t"'f'ace otrtlets, ~ile other lak'IJS have small l1o.'xt.u.ral (:i'l'tt·l'Jt15 l ecc..tu poiltt:I.ng to C~:t"ell;,.,~.l'y lang le.g ti4.-es. Stl.«e~t g:r'a!li.err'<:>s :for th.e l'lOUXttain a.:t.-<cas ~ steep; . .hv<'{-c·'rer, gltwicr.;z :i.u th.is ru"0a com .. p1e·ta1~~ fill ·tb . .e vaLl.e~13 dolrn t;:) t.l1e foot of tl~~ tJ;)r:.'JJ:rtalil~" 1Je1~ tb<.! at:remu gra~iient l."eCQIThe$ :e'l.at, 'With S.. "'le'r'J l:i.nJ:t,ed. ~u:c.face CC>.tl.; t:J.~1.;utint_S e.;l~!·ao-'l:b.e·l.~ l"!.fla rtc.rt b~~n t;inw fcrr a trtre:f;Lf:ri."l.o~? !;tel,ttt.t~:t-n ·lA" d.,g'li"e~Lop :tn tJlis m"ea S.ilWC tha l".;c,;ssion of t.he gl&clex's.,. ~~~~'le :r-~enroir er~;:. abcP?e ~ie-ntlll D.$.i1i is ·t~lt!~;' 1·1.$.,b ~ t~ .QOO~fcct d.a:m l:t~ t11e cap:al:r:l,.l.:tt~r o.f eto:t~mg v.:ex 5,CrJll,.iC~~)(; a(:::~~~ .. ~ ... ~~.+.. -i-_·r-1 "''""'ll"' "l:P"',··''>'" ~o::.r:>""'"O{~.-. 1~.r"f">~ .• """.,.f"_'h''">"::':'.·f·~ ""i-'."'""l·'"'-~-e-c·'(''''!i~ 1'"'" .~ ..... ~ .,.t...J. ~;1 .. 4.._ t;!",t -.!-.....'.&1.._~-4 Av .... -cs.. i:' ""-..a.,. ,_...,.. ............... ~ QVl-t, .......... ~~-~~v·--"':;r .. ,.'-" .............. 'J.... ...... ..- t.rt:l • .lized :tn con:troll.L'13 the inf'10'<1 t'lcsigu f.lood . .\' mr~:.iDg 1:t p(;ss;:roJ.e to uti 1·!ze e. l.:'lin:f.zmJ.m: Ca;t)tlcity ep'iJ..lwey~ This rw...u;:.-.,s t-.hs.·t :j,t "'·v:Lll be necosS$J:"'.f to d.c:r"i:'le a ma··;::iL-r,J!!t :prON.!.ble 70lt::Ic?>~ flood c1..;,cn6inr{ over t..~e entir·e s:vrl;o.g and sur~· rnno.:ff r;eas6n:' ~!.:his flr.>-"Xt ~r:tl.l ccn:wi$·t o:!. ~p:dng s~mw:tt ··J?l'~ su:nrner g1aeiai. melt. Ue lx~l:teve that, :t.~a:tn w:1el.er su-ch conditions l!Ould ha.~ro l:i:tt.Jf~ c:J:'fect on the flood volt%·n.e since glacial mel·!i..-onowru.e.ltF and t~~era;tliJ.:"e ro~i:l the all ... ~...Mt fs..ctOl."Sc 11 St1-eamflm1 records. The follcrwin.?; <llBcb~ :t~cord.s ~·re av~la1>le toi ... ""sti~ams in"~t.Ee Susitna Iliv--e.r B-~:tn~ SUBi:i".n";. lli"tCl' at C.olr1 C:rcek; drai:1.1ege exca 6,160 ~~q;dP...re. mile~ (apr..rox:tmat.':;!ly); period. of :r:ecord., /illgu16t 191~9 tb.rougn September 199.3 ~ Su.s:t:'cna River near Denali; drainage area 950 square m.lles. {r..J!.i.xroximately}; period of record, Hay 1957. through. September 1958 • f;~le~an Rive:t•.11ea:t• Pa"4.3on,; d.l·ainEgo a.-rea 280 square nt:U.es; :l?Ell'iod of record, June tl'l .. rougb. Sepi:.cJ.n.l.-.cr 1958. ] 'll.. ' I -~ ] ~-, I; J J · ~:h1lt~id.tm ~-i tcmroo:~w.-~ ~~~.. ~~ ~ riQ- ~~~~~-....~·.-..-~"""'-,...~4..*'"~~~ ...... -#0 :t~i;p'it-.td;:loo u:>."' t~~:t~lttt.\:>'i:ll l.Th1<A"dfi :to.:l" ~~ti~!t ~"it.~m th.tit 5w~1tl$. niYt~r ~11"1 ti1xr:V"IJ' G'l.d. C~t~k... !cr::tit.&o~ -o:f Jli1~oh ~~tia..~ m:.~ i~ "t!M:U:\ ~~ ~h.~dil ® l..'ila;~~ 2v 1~t'Jl'i.t5 -~ mr;:®!t Q.f tlla® ~tsti~ ~ ~~~>"10 t() 20 j"fi;£,'1;.$. fJit.'S :l®.gew..t :t'f;1;;:}ord i$ ~ ~t~$ ~!.P,..i~ tit.m ~ ~'"rlg..~rtM!r.tt'e ~~{)A'~ i~ July .l';i:ill t.0' ~* ~-... -~ ...,., ,jj,. -~ ,.....,.,._,~ tl.«+>~t ... _.... . --.. .M ' 't~ ... ~_,,, • . ~~~:.?-?~~-~~~~~~~~ ~~~~--v·~~ J...~ r*'V '"~~~~¥.\J~ j:;.,•~-'"__,.,.,.......,_ *O'E":'f" """""'-"" ··~···•-'·,.,,__,;! -11~1~~· ~~~"' /t.,.,-*''~•" .&"""'"""'""""""'+v;-~ .,,tic l';t<>~~,if"~bll.:t~~};'" ~).j!i.F w~~:k"l\sft ~~.i.tJ.f~t.tr.t~v'! ~-;, t..l:il~ :i.A-Wa..,.·.,...J l;t\;...~~~~~.f;i;..Ji.~~@ ~\~ ~J~~~~ !~ms.m -fJt. 'hr~ t~~tu.t~ o1 40 t-.nd. 4; mta ~ ~~~~im'l ~W~ll't C.if 0, 75 ¢Sti~~ fi'f'..m ~00$~00 -p.n-~G;i:.ol'.!$: .cilf tl:t.e t\;:nali hy(b;¢..,. ~~1~~ ~~¥"~t"-:l:rotW ~-t ~~)~ ~~ i_t¢:a~<:tl 'tie~-YJ'l!f. 'th,~ lUnt~tl:r ~ ~~ t:::U.~ st,~'t1.!.J.n. \~.JtU.t't j);:ctliil~· c~·t·te.r &'1-t~ t<F'~ S~1t1tttlx',g -~ clc;tJ:J.grt i;lii$1f~l.tr-e ~et!l~'lC~ ir,"' t;)J..:er h;:f{tvo-therrog.t."t~• Jg~e,lill'\3 -p:iro\-~0. :e;..tC;r:;e:~11t~ tu,.l. l?rr..:~m~:i"'.f e~W1Jll'sXM ci" tlt<;l h:.;.:d..Y'Oth~:~.,~rsr-atr~'ic 'Wit-h th.e x·miD1:.-"t .. l'~J.Yo.;"l1;,~"'l1$ o~ th~ S~t~ lli.1."!!-!t1; r.,~ Denali ~Ed i:}.t~ !"~e.;;:~:::.t River ~~t~ h"t~~ OOiiT.~A ~¥A. ~l"$.~Th'lllt, A 't~~ f."!...o'-3 ~~-esti,l~Jt>Sd 1:.~0-:'1: th~ ~~·.u l:i..}~2gl?Ck;~ (~ p:tz,~~ :1) ~'l{t 't;J-r* l!et ltyr!,.l'{1f)~ ~C'Wi1l~~tc--dt ~li l~t. l~:y~1. .. 1~·:~r;~1~tt ·"'11~: cc~w~~x-a,J~ 1:d til ,!~ll'.!: lt~rd;l~¢1.1:ie~~l~~J!l5 t;1~1<1 -1~~:~ ZoL1.ov~~ i';'\·,.tt."'-""'io. ("·•~+·t:--;jftf;G(' 'f~}'t!"· ~!;~~-'f:•'XJ! 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ZL~i ~fall •1-.Jl:':r)· ·u...~ --~l"~.t~ lWl'ti$ b~ Qf it{};;' ,.._;#, .l'<i'i!:{>-.<11~-1... .l .. ,...;c...,._,.~ .. ~ 1:,~~ ... _·J .r.-.e ""'~ ·"'"it> 4~~ .... .,.,...:,.--<b, ... ~. Vu. .4"~;......~\P-~ ., ~A-\.t.J.=~~.r~ ""'·~:J~'Q:~~A. ~.U~ -~~-~-~~, ~·~ ~-~Uo<t$# ~~> Jtw~u£~t 1 .. 4 Subt~-t 7;~.1 f;< 'b~ ;li..Jgoot 5...8 Sa'btre,c:t 42~ c.. i;;ugtult 9...-1.1 Subtr~rt. 1t3j). <1"' h".~uat J.2 ... 14 Su.b"c~ct 44 q. ~·t; _.i.U(~v.ct. 25~pt~~rfo.er 30 &.l"btl'~ 45c Q.~rt~ ·~e ~ tl!!:~l~ ttt~~ ~· 300 ~-*'$ ~ ~ l,i rt~ ~'C~U.y f.f<.'b l~OC.:'a u.util. Jtily 15.; ·~ ~~ ~~~ij:~ ~·it lll1f ·99~ . . ·~~ ~14.~~~ Ctt'!J\Llllt~. lsy thli'l ~ ~11;1~~ 5..1£ rth~ t!&1 !Jl*'"t~ 3 $J.Q~ trl.th ~, ro-.J<';.t"d~~ ~'\l..~~fh.,. A t"a$2~hl:y-f;;l'X~ ~~t:t1l:C""· ·du.e-~i® \itt$ obt~t TD..0 wo ~l~O.-\a off v:Wa di"'.~~"l~ ~' Jt~~ ll~1 n..~ Juty 26..cJw..)-.i£'ft. 31 a.."'\l 1~li~'l.t<tad t1)J.e to ~"'..rot~t: trm l'f'"...iu..'i' ~~ ·t?:t~/ 't1v'i~i~ wtt.*'t ~"'itxl~ -m: !'re<,tt:Pi ~ti~ ~~t):rdrul .s;t ~tl.lol~!Ytm?+ :U.~ ·~t~h~::t"' ~~;tar~., '111{;1 h}~~~• ol; tll~ B®i~ Ei17a'!f .a.t ~. t~~l¢: 1.~ ·~ ~h~ (J'gl ~ta 3~ Tn'* !l95"f. rt;t.:~t .m;. ~ ·~ !JlDt.~t~t ·~. :t~:t&f'~ 4<t ~!o@.'t (Jf' th~ ~ ~ ~~l!"~tea ld.t~ the t;:r..e~t£*-:ton o£ ~. f~"Y>ft r_1;!! .. ;,!$ ~t t.~~ ~~~ ·;,..,;''t'\';.t ""# ~.~,.. .. oJ< *"'f.>"'-" p~:.,.r·'t .. ,. 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