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<br />;lccor(Llll(:~ \',.'ith t1K prnvi5i011S of th.: Compact A ]lL'\\' ..:ap:l.:ity
<br />table of John M;"trtin Rcservoir, ;\L!optcd dS llf June L 1958,
<br />h;ls bl"L'1l prnvidcd hy t'he Corps of Engineers as ;1 rcsul t (If
<br />1ts rcsurvq' of thL. sediment contents of the rcserv<lir by sonic
<br />methods III If))7, hut a complete ;mal)'ses and rcrOft uf this
<br />resurvey and :;tudy hOls not yet bLLn made beL::\lI5C of 111-
<br />~uAicient funds f(lr ~uch purposes, The United Sti\tcs Gen-
<br />logical Sur\"l')' hil.'; :11:,:\1 c\lntinued the l1peri\tion of the Com-
<br />paLt g.lg1l1g 5LltlilllS ami the ;lJlal)'ses ;lIld cnmpil;ltion pf
<br />hydro!(lgic Llat;]. presenteJ in this rq:lurt dllJ used in the aJ.
<br />mlllistratilJn of thL. Comp;ll.:t, To ;15sist that agellL'y in defr:l)'-
<br />ing the CLlsts of operating' the Cnmp,ll.:t g;lgli1g 5utiuns :lJld
<br />perfurming oth:r hydrologic work rcquired in the adminis-
<br />tr;ltioll of tilL' COmpll(t, the Admini,__ti'.ltillll cntereLI into ,I
<br />cunper:ltivc :l~rccment w1th the Geolngic;d Surw)' for the n"eid
<br />\'L'i1r cneling JUlle :;(), 1959, Under the ram-- nf thi.o ~I~reemellt.
<br />.~ I ,1.11.11) \\'.;s' l,ruviJl'd by the :\JmiIli~tr.ltiull ;l11d .Ill c-Lju,d
<br />.111lllUrH hy rhe Ge"I(]~le;d Sun.'ey fe'r the .d">,AL' pllrl,,-,.oe~ T,)
<br />t':lcdit.ltL thl' ')pcr:ltl',f) "f thl' .1(,1111 Ivf,lrtlll R':';'.T\",j'r I">y tIle
<br />Curns of En~ine('rs, the Gcoln~ic;d Sun.'cy h:ls Ilfnvlckd :l
<br />Stcvcn~ tl'lem,lrk rl'c'lrdin~ !::~IC~\' :It the g:lg:lllg .ot:ltiC'1l kIn\\"
<br />the lbm which pr<lvicks :111 ]nst:\I1t;\I1eous recmd :It the cLim (]f
<br />the SL\g'C5 uf the rivcr a t this g.lging st:ltion, This II1strlll1lent
<br />is of ;\..lvallt:-1ge in determining- W:-1tcr rdc-i\sc" from the reser-
<br />voir. C'sJx'cLdly when ch:lngLs III such releascs :Ire requested
<br />Iw the Administratiull, The GculngiGll Survey Ins a\so m:\dc
<br />(lther impruwmellts tn S(1J1lL of tn~~ Cnmp.lct g;\ging stat}on:;
<br />during thc current year, including the in.;t;llI:ltil)!l of i\ huhbler
<br />rC(Ordllll;' ~;I!.~\' ;It the g:\~\Il~ St:ltlOIl nil tl1L' Arkil!lS;IS R\wr :It
<br />L:-15 /\ni~1;1'5 :~'h)vc the ~~scrv;~ir.
<br />
<br />7, 'Fater SU/Jpl)', Re,~cnJOir nlJaatloll null. H~'drolo,f!,;( Data
<br />
<br />At the hl'gilll1lllS (If the Cnmp;lct \\':\r (In November 1, 1957,
<br />fuhn M:lrtin Reservoir CnlH;\illed -:'2(l,O:;4 acre feet llf st(lrcd \wtter.
<br />At the h..::ginning of the Irng,ltio!1 5Cilsun on April 1, 19.1S, the re~crvrlir
<br />stnr;lg't.' hild II1crC:lscd to ~7S,724 ;)cre feet.
<br />
<br />On JUlle 1. 19:;R, the Curps (If Engineers puhlishLd ;1 reviscd
<br />';:,IP;h:\t)' t;,hlc tl.r trH:: r/sef\'uir h;\.5CJ upon ;\ ~urv(',y l\f A\'j~'ust 1<)57,
<br />This revised t;lblc C\'IL!CllCCS th:lt 511hstamii-d scdiment;\tinn n:l5 occurred
<br />in tne re.';l'rV(l]r SlIKC it was placed in opcr;ttill!1 in 1943, The n('\\' capac-
<br />ity t;lhlL. complltLS the total c-IPdcity of the reservOIr at 645,512 acre feet
<br />Of thIS t,)t:d c:q1.lClty. 3(i6.9()(} acre feet ]S ;llloc;ltcd to the cr:lllscrv;ltil)fl
<br />pOI>l with the rem:\ining 278,543 :lcre feet :tlb,::ltcd to t1(l()J controL
<br />
<br />Ahove normal rOlins in d1C SllmmCf and f;lllllf 19:;7, tugether with
<br />f:1\'nr;lble ::!lm\..Lt!1 durin~ th.:: winter munths. aecomplishcJ ;m all-time
<br />hidl for stllr;\..:!:e in John M;-lrtlll RCSCf\'l)ir, both at the close of the irri-
<br />-;:l~l()n S"::':I-3'1]1 ~)n O~tLlhcr :; 1, 1 ~J5i ;lnll ;It the bcginnlllg of thc ]rng,l-
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