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<br />. <br /> <br />. <br /> <br />USFWS - Palisade/Grand Junction Stream Flow Analyses - DRAFT <br />May 12, 1995 <br />Page 7 <br /> <br />DISCHARGE RATING CURVES <br />Colorado River 27.5 Rd Gaging Station <br /> <br />3D) <br /> <br />2SD .------------------------------------------.+.----------------------.. <br /> <br /> <br />1993 <br /> <br /><n <br />~~ ---....----------------------------------------------- <br /> <br />W. <br /><.:l <br />~ <br />g1eco <br />o <br /> <br />,em <br /> <br />"'" <br /> <br />o.~ , <br /> <br />1,5 <br />RIVER STAGE (Feet) <br /> <br />2 <br /> <br />2,5 <br /> <br />I · -1991 <br /> <br />1992 ... 1993 'V 19941 <br /> <br />Figure 2 <br /> <br />The stream gaging data received from Piland has been attached as Appendix A. Figure <br />3 graphically presents the recorded flows at the 27.5 Road Gage during the monitored <br />periods in 1991, 1992, 1993 and 1994. Piland indicates these flows are of good quality <br />with the exception of December 19-28, 1992, December 18-31, 1993, and December 11- <br />31, 1994 when bank ice hindered proper operation of the gage which resulted in missing <br />maximum and minimum flows. It is interesting to note that in 1993 August was much <br />wetter. and that the average flow in September and October is about 500 cfs greater than <br />the 1991, 1992 and 1994 flows. The extended measurement season of 1994 shows that <br />in July the flow dropped from about 1,500 cfs to about 700 cfs. The drop in gaged flow <br />coincides with timing that the Orchard Mesa check dam was placed into operation. The <br />