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<br />on0131 <br /> <br />- 17 - <br /> <br />Bypass allowances to meet prior downstream rights, as used <br />by the Bureau, were found to be generally adequate except on the <br />Little Navajo River. On this stream it was felt that an allowance <br />of 100 acre feet per month in the winter months should be bypassed, <br />when available, in order to maintain a live stream for stock watering <br />and other purposes. In addition, some irrigation water in April <br />was allowed. Bypass allowances of 1600 acre feet per month from <br />May through September, as used by the Bureau, were deemed sufficient. <br />The increased annual bypass allowance as used in this independent <br />study reduced the divertable flow for the 1934-54 period from <br />the Bureau's 6000 acre feet per year to about 4500 acre feet per <br /> <br />year. <br /> <br />Bypass allowances on the Rio Blanco were sufficment to meet <br />downstream prior rights. Flows during the irrigation season would <br />exceed1total irrigation rights by only 3 cfs, although tributary <br />inflow below the diversion site and the fact that by>!:>ypass <br />allowances are somewhat generous would provide considerable <br />additional flow. Bypass allowances on the Navajo River were <br />sufficient to meet all prior downstream rights. <br />The average divertable flow as determined by this study <br />checked very closely with the Bureau's estimate of 110,000 acre <br />feet per year, despite the increased bypass allowance on the Little <br />Navajo River. <br /> <br />, <br />, <br />, <br />, ' <br />"~;; ': <br />