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<br />low flows could result in low levels of dissolved oxygen. However, no data show any significant <br />change in dissolved oxygen with flow. There is a statement that dissolved oxygen changed very <br />little and there is no evidence that oxygen sag was observed with time of day. The conclusion <br />thM thP.TP. wnllln hf> nyvO'pn ~~O' i<: not <:lInnnrtf"n hv rhm'l f'_nllf"C':tP:r1 nl,rina thp. f"'Xnp.nmp.nt<: <br />---- ---- -- ---"g----..<=I-- ---. --[""[""----- -.I ---- --------- -..--1;> --- ---r--------- <br /> <br />In the conclusions and recommendations section, there are several conclusions that are not <br />supported by data in the document. These include the limited availability of secure feeding areas <br />for fish based on reductions in depth of riffles. The average riffle depth is still nearly one foot at <br />the 250 cfs and the average percent change in riffles is 14.8% in width. It is unclear how this <br />conclusion was arrived at using the data presented in the report. A better presentation of the <br />basis for the conclusions would add strength to the report and also would be a better means to <br />transfer the conclusions froni the summer low flow test to the Navajo Operations ErS. <br /> <br />Comments Regarding the Summer Low Flow Tests <br />Bureau of Reclamation, November 2001 <br />Miller Ecological Consultants, IDe <br /> <br />Page 3 <br /> <br />December 18, 200 I <br /> <br />00745 <br />