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<br />It is proposod, in tho ovont of the constructi. 0". of the
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<br />Sm Luis Vo.lloy Dr"in, to permit tho storago on tho hondwntors of
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<br />tho Ri.o G~.nde, and di.vorsi.on to Sc~ Luis Vnlloy lnnds abovo tho
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<br />outlot of tho drnin, of r,n c.mount of vrc,tor oqunl to tho dischr.rge
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<br />of tho drain. This, in effect, is substituting in tho flow of the
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<br />Rio Grc-nde into NeTr I'~oxico tho disch:1.rgo 'Jf the drrtin.. in some
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<br />dogree sn.line, i'or tho frosh mountcLin vro.tor stored and divertod
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<br />above. The c~ount of flow at EI Paso ,till be uno.ffocted, but its
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<br />sal t content will be incronsod by an amount npproximc. ting tho di.f-
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<br />forenoe betvfGon tho snIt contGJJ.t of the Rio Grando hoadwc,tors nnd
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<br />thnt of the Son Lui.s Vnlloy Drc.in vmtor.
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<br />Tho 1932 Middle Rio Grando report by E. B. Dobler, on
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<br />po.go 132 prGsGnts n tc,blo shereing Cill avorage passage o.t EI P~,so of
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<br />approxi.mc.toly 700,000 tons nDY\unlly of s eel ts. The snIt contont
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<br />of S~~ Luis Vo.lloy Dro.in ~Y\tors, ,nth an outflow ~f 40,000 acra
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<br />foot and assuming so.l t contont telo sruno as Sm Luis Lake in tho
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<br />past, would be 47,000 tons. Tho """xi.mlL'T! affoct of substituting
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<br />drfLin 1,'mtors for presont moun"tflin l'T:ltors 'V'iOuld theI: be nn incronso
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<br />in salt content at EI Po.so, of 7,1,. Considoring thc.t Rio Gnmde ".-utors
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<br />r,t Del Norto do conto.in somo so.lts, thc,t tho wators of tho dro.in
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<br />will, no doubt, froshen and t;oo.t c, pc,rt of the salts from the drain
<br />
<br />vm.tors will inovitr.bly C,ccul'lUhto in Eiddlo Rio Grande Valley in
<br />
<br />passip€ to tho Rio Gmndo projoct, it is oxpected thc.t tho salt
<br />
<br />content of Rio Grr.ndo wretors Oct EI Paso wi 11 i.ncroaso not to oxceed
<br />
<br />3% to 5?!,.
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