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<br />OD.ll213 <br /> <br />99 <br /> <br />periods of time whell the flow in the main COln.eyancc channel is at <br />maximum design ctlpneity, the \\"ut('f surfncc in Sun Luis Lake \\"o\lld <br />he about elevntioll 7,520.S, uno t.he snrfnce urea would be about 900 <br />Heres. Thlls, the mnximtlm nmge of fluctuution of the water surface ill <br />the luke for brief periods of time would be only about 1.8 feet. "ith n <br />fluctuntion in water sur(llce urea of onlv about 40 ucres. The mainte- <br />nunce of n reusoIlllb!y constant water ievel in San Luis Lake would <br />not result iun signific~nt increuse ill depletion over that which occurred <br />historicnlly. Ahm, inaslIluch as no significullt reduction ill the historical <br />wnt('r surface llren has been considered under the plan of cle\"elopment, <br />the maintenunce of tile luke nt. 11 rellsollllolv constunt len,1 would not <br />reduce the estimated slllnlge_ There mll): be some recirculation of <br />wuter throu~h the portion of the well field contiguous to the lake. <br />The llIllount of recirculation is indeh'rmiuatc at this time !lnd should be <br />defined when the uquifcr churlwteristics Ilnd till' permellbility of the <br />Iukebt'd fire deh.'rmined during w('1I field const.ructlon_ <br />The \"urious potentiul uses of wuter Hnd the magnitude of such uses <br />nre discussed in the following purugruphs for the three conditions of <br />development of :-iurfu{'(' wuler resources in the 81l1l Luis Vulley_ The <br />IHlditiolllll use of wllter resulting from the UP\-e1opmcnt of the \>oten- <br />tiul AlulllUSIl Refuge is considered under nil three conditions. T Ie net <br />umollnt. of snh-ugeu Willer Ilvuilnbl{' to offset the present uccrued Rio <br />Grunde compllet debit of Coloftlllo, to Illllintuin the scheduled Rio <br />Grnnde compnct deliveries Ilt LolmLOs, and to Il.lle\.iutc the shortages <br />in the Rio Grunde Vi vision, would un'rugc 96,400 Ilcrc-fcet per yellr <br />llfter deducting the estimated 5,300 Here-feet depIction of the Alamosll. <br />Refuge. This un'ruge !lIlBuul net water sahrnge estimntc is used <br />throughout the following unulyses of poteJltial~ uses. <br /> <br />COXDITJO:-; 1 <br /> <br />Accounting of water under the terms of the Rio Grande compact <br />begun on JIUluury 1, 1940. The credits for nil three signat.ory States <br />were cllIlcf.led in 19-12 hy the ~pill of usnble walpr from project. storag-e <br />(Elephant Butte und Cubllllu He:;en'oirs), From 1943 through 1949, <br />Colortlllo grnduully uccrued n credit of 144,700 IlcJ'c-feet. Subsequent <br />to 1949, there lins bet'n II {'ontinuou:; trend townrd the nccllm1l1ution <br />of debits with Colorado's llC('fU('d debit nmounting to 626,100 acr(>- <br />fpct at the end of 1961. Tht' aedits nnd debits uccrued ut the end of <br />eu('h ('ulendllf yenr ure showll nUlllprif..'ully in the followin~ tnblllntion <br />nnd ~ruphicnlly on drnwing 253-504-1826. <br />