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<br />Results of Long-Term <br />Monitoring and Research of <br />Colorado River Sand Resources <br /> <br />. . .,~.. "~''''',' Y'. ,I <br />. l:,' .',1,.' \'..' 4(\ . '1"lll1i~~,," .,. ....l....,j . <br />. ',p. '. '" t" "l j' l f' " :6' ~ ' ~ ,,~~~ ~ ' '- <br />,-;titllttJ!l~. '~-.\~ ,'......"'..... <br /> <br /> <br />. : iJl,;~\i.~U1;~tf'.I{tl' <br />ODH, ~<,<'L,,~~ <br /> <br />u.s. Geological Survey <br /> <br />Utah State University <br /> <br />Northern Arizona University <br />