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<br />. <br /> <br />. <br /> <br />USFWS - Palisade/Grand Junction Stream Flow Analyses - DRAFT <br />May 12, 1995 <br />Page 14 <br /> <br />Monthly Local Inflow Comparison <br />Critical Reach versus Reed Wash <br /> <br />9000 <br /> <br />18000 <br /> <br />7200 <br /> <br />/'" <br />...._... no._ __. __. un.. n n_ _ __ _ _ __._ _u...... _. __ _. _ -x--. _""'::""_~ .".. _ _ _ __:~''-' n.....". -.. 14400 <br />X. <br /> <br />16200 <br /> <br />,;; <br />= <br />o <br />~ <br />!( 5400 <br />. <br />o <br />:'S <br />~ <br />:: 3600 <br />'" <br />II <br />. <br />" <br />1800 <br /> <br /> <br />,;; <br />= <br />o <br />.... 12600 ~ <br />'X !( <br />uummu 10800 . <br />. <br />o <br />9000 :'S <br /> <br />] <br />. <br />" <br />.. <br />5400 ~ <br />'C <br />U <br /> <br />..m'uuuum'mm'......'m""m>>mmm' mm ..>.. 3600 <br /> <br />1800 <br /> <br />o <br /> <br />o <br /> <br />Jan Feb Mar Apr May Jun Jul Aug Sep Oct Noy Dee <br />Month <br /> <br />-a- 1976 Reed Wash -+- 1991 Critical Reac.~ -)( - 1992 Cntical Reach <br /> <br />____ 76 Reed Wash Base ...- .199] Cntical Reach -*- 1994 CnlicalReaclt <br /> <br />Figure 7 <br /> <br />Estimated mon~hly volumes of local inflow for 1991 through 1994 for the critical reach <br />are shown on Figure 7 with a hydrograph of local inflow measured on Reed Wash, a <br />northerly tributary to the Colorado River by Lorna, Colorado, in 1976, as reported in the <br />Hydrosalinity studies. The 1992, 1993, and 1994 December data have been adjusted to <br />exclude the icing periods. Previously we indicated that the 1993 data seemed to support <br />a theory that the delayed return flows produce a base during the August through <br />December period. With the adjustment to the December 1993 flows and inclusion of the <br />1994 data the results appear to parallel the inflow data measured in 1976 indicating local <br />return flows are largely related to irrigation returns and are less in the winter months. <br /> <br />Additional insight into Grand Valley irrigation operations was sought through telephone <br />and personal interviews with representatives of major irrigation companies over the past <br />years. The individuals interviewed were Bill Klapwyck of the Grand Valley Water Users <br />Association, Paul Calder and James Rooks of the Orchard Mesa Irrigation District, and <br />Phil Bertrand and Charlie Guenther of the Grand Valley Irrigation Company. These <br />individuals are responsible for the majority of irrigation water delivered in the Grand <br />Valley area. The Grand Valley Water Users Association operates the Government <br />Highline Canal which includes deliveries to the Palisade Irrigation District, Mesa County <br />