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<br /> <br />..... <br />:.D <br /> <br />:. ~I <br /> <br />c. <br /> <br />PART 1. INTRODUCTION <br /> <br />The Quality of ~ater. ProKress Report. No. 14 (Progress Report) vas <br />preparefl by the U.S. BUle-au of Reclamation (Reclamation) of the Dep;1l tment of <br />the Interior (001), in cooperation ....ith the U.S. D@panmenr of Agriculture <br />(USDA). other agencies of the Department of the lore-liar inclurliuR the U.S. <br />Fish and Vildlite Service. U.S. Geological Survey (USGS) and the Bureau of <br />Land Management (8LM); the Ellvironmental Protection Agf'nry (ErA); and the <br />Colorado River Basin States of Arlzon;\. California, Colorado, Nevada, NeIJ <br />Mexico, Utah. and Vyoming. This Progress Report is the latest in a series of <br />14 biennial reports beJ.':inning in 1963. <br /> <br />Part I covers the authorization anri leRal aspens of this [("port. Part <br />II gives a brief deSCI iption of the Colol-ado River Basin. thf' subject of this <br />repon. Palt III summalizes DOl concems ....ith rhe water quality in the Basin. <br />Part IV If'vie....s the Cnoses and effects of the mo~t significant Pl-oblem in the <br />bitsin. sal ini ty. Pan V looll's at the !':al ini ty problem in morE' depth. <br />diSCUSSing many of the factors which affect salinity. Part VI d{>tails preSf'nt <br />and future r1evE:'lopments '....hich ....ill affect salinity in Basin. Pan VII <br />sllrnmilrizes rletnils of tl\(> Culorado Rivpr Silliniry COlltrol Prnglnm vhi('h is <br />mE:'''nt to offsf't (he effects of miln's dE'velopmeTlts anrl pleselllP thp resource <br />fnr in-igation, municipal. industrial. <Inri other liSPS. P.-llt VIII summarizes <br />rhe results of the Colorado River Simulation SY<:;lem U"HSS) sellinity <br />projections. The projections stnn at r"espnt ('onditions in lQRR .-lnrl PIPdict <br />[lay iHld salinity through thl' yeClr 2010. Finally, Palt IX summal izes 1Ji'\ter <br />quality studies ....hich Clle lelE'vant to the purpose of this repon. <br /> <br />A. Autholi.!a!ion for _~<<:p<<!_r.! <br /> <br />This is the 14th bipnni;ll pror.n'~~ l"PJlort on qlli'll1 ry of lJ;nE>r in the <br />ColorC1do River 8..sin. The directive fOI pn'~iHing this leport Is ('ulltained in <br />fOUl sepiHale public li\....~hPlIbli<: La'''' 84-485. Public La.... 87-483, Public La..... <br />87 5QO, .=rnd Public l.alol Q1.~2(). <br /> <br />rubl ic Litw 84-485 states: <br /> <br />"The Sf'C'retalY of the Interinl ic; dirf'cted to ronlinlle studies i1nrl make a <br />repon to the Congress ilnd [0 the StntPs of the Colorildo River Basin on the <br />qu.dity of ....atel" of the Colorado Ri':('[." <br /> <br />Pub I ic La",. 87-483 states: <br /> <br />"The Secret<H}' of the Interior is dirf'ctf'd to ('ontinu(> his sl'lrlie~ of the <br />quality of ....ater of the Colori'ldo River systPI1'l. to appraise its suitability for <br />municipal. domestic. and il1dustrL:ll use alld {Ol irrigation ill the vatiolls <br />areas in the United Stall'S in ....hich it is used or proposed 10 bE: lI<;:erl. to <br />estimate the effect of additional developments invol'Jlng its stori'lgeo and use <br />(....hethel" helf>tofore authorized or contpmplated fm authOI iZiltion) on the <br />remaining ....ater <lvailahle tal use in the United Stales. to stllcly elII po~sible <br />means of irnprovinR the quality of such '."ater and of alleviating the ill <br /> <br />1-1 <br />