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<br /> <br />INTERNATIONAL BOUNDARY AND WATER COMMISSION <br /> <br />UNITED STATES AND MEXICO' <br />IBwe BUILDING <br />4110 FtIO BRAVO <br />EL PASO. TEXAs 79902 <br /> <br />OITle[ or THE (OWNIS.l)IONfR <br />UNtTLD STATes Sl:CTION <br /> <br />SEP l' 8 1981 <br /> <br />N <br />o <br />c...' <br />c...q <br /> <br />Mr. Jack A. Barnett <br />Executive Director <br />Colorado River Basin Salinity Control Forum <br />220 South 200 East, Suite 320 <br />Salt Lake City, Utah 84111 <br /> <br />Dear Jack: <br /> <br />Thank you for your letter of August 20, 1981 which enclosed for our review <br />a copy of the Colorado River Basin Salinity Control Forum's "Proposed Report <br />on the 1981 Review of Water Quality Standards for Salinity of the Colorado <br />River System," and advises us of the two scheduled public meetings to <br />receive comments. <br /> <br />As Principal Engineer Baumli discussed with Mr. Weber, we are concerned <br />with those portions of the proposed report beginning on Page 18 relating <br />to projected salinity concentrations, in particular Tables 3, 4, and 5 <br />whicll show projected salinity concentrations, assuming an average virgin <br />flow of 13.0 million acre-feet (~~F), which exceed the established numerical <br />salinity criteria, in some cases, by substantial amounts. To use such low <br />average flows seems overly conservative and would arouse unnecessary concerns <br />on the part of Mexico. <br /> <br />, <br /> <br />We understand also that the values are projections only and importantly <br />do not reflect salinity control measures such as the on-farm programs which <br />would further reduce salinity concentrations. We suggest, therefore, that <br />discussion and publication of detailed projections for an average of <br />13 ~~ be deferred at least until the effects of all salinity control <br />measures have been quantified. We would have no objection to the general <br />relationships shown in Figures 3, 4, and 5, but we suggest that an <br />appropriate note be made that the projections do not include other control <br />measures. Your careful consideration of these comments will be appreciated. <br /> <br />I do want to add on the positive side that the proposed report contains an <br />excellent summary of the Forum's commendable work and of the federal and <br />state efforts to control the Colorado River salinity. We will be looking <br />forward to receiving a copy of the final report. <br /> <br />We would also appreciate, if at all possible in the future, your early <br />consultation with this agency during the preparation of future draft reports. <br /> <br />ls<nO'~"~. ~~~ <br /> <br />J. . Fri dkin <br />C unissioner <br /> <br />... R-' <br />~<,:." <br />- c""- <br />....:J;.~ <br />. .. ~ CJ'\ <br />c;:{.!" '- <br />,p,y'-=-' <br />.~. :.' <br />'I .. <br />~' , <br />~,~ <br /> <br />J; <br /> <br />_,,,.t,;,,, <br /> <br />;w':",,_ ,".L-"~ <br /> <br />, '\'1"<'9 <br /> <br />f.~;,; <br />".""~.'," <br /> <br />"~"1 <br /> <br />, <br /> <br />Cc. <br />"'-, <br />vi <br /> <br />