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<br /> <br />-r <br />-- <br />Q:>lkdi"X n""a:WlllpIN III tl,t R"~ ~1<tW GIn. Cmryou D,~" <br />U.S.Geological Survey of the dye into the river. The <br />(USGS) objective of the dye ~tlldy wa., to <br />deter'mine the time oftnlVel for the <br />water ID088 through the Glen and <br />Grand Canyon are88. <br /> <br />cullect.ed orthe Glen Canyon reach, <br />the Lillie Colonldo Rivel" drRin8~e. <br />and the lower portion of the Poria. <br />Hivez' drainage. <br /> <br />~~:: ,It....) <br />'. \ <br />~<t... >f>. <br /> <br />I - <br /> <br />, <br /> <br />To allow for ft comparil'lol1 of dam <br />release (power' records with actual <br />rive,' now, 8 new gaging station ,vas <br />established one. quarter mile below <br />Glen Cauyon Dam. Personnel from <br />the USGS office in Flagstaff. <br />ArizollR, manned the gaging <br />at.ation, meMul"ed discharge level5. <br />and developed 8 stage-rating <br />1-elatiullship. TIle USGS personnel <br />also collected woter ssmple8 for <br />chemicalalld nutrient analysis, <br /> <br />The USGS olso ~lIpplied gaging <br />crews ot ~'s Ferry gage !River <br />Mile 0), thf." Groud Canyon (River <br />Mile 87), National Canyon (River <br />Mile 1661, and Diamond Creek <br />(Rivel' Mile 2251 gage~, Samples <br />collected included: di8Chol'gE", <br />velocities. !Iuspended sediment, <br />bedload mO\'ement (at Notional <br />Cfmyon), Rud nutrients, Somple~ <br />were ftlso tAken fill' time of tra\"el <br />studies fOl' the Hhodamine dye tetlt, <br /> <br />At 7 p,m. 011 Sunday, October 8. <br />approximately 27 gallons of <br />Rhootlllline dye were placed into the <br />river at Glen Canyon Dom. <br />Personnel from the USGS, <br /> <br />, <br />. <br /> <br /> <br />Reclamation, Glen Canyon <br />Environmentol Studies. Arizona <br />Game & Fil'lh, and Glen Canyon <br />Dam assisted in the 8afe insel,tion <br /> <br />- <br /> <br />.' <br /> <br />'!be dye reftched the first gaging <br />Iltation, one-quarter mile <br />dowl1etream, approximately one <br />hour after insertion. and reached <br /> <br />" tA 'J . <br />... ;~ . <br />. <br />.. <br /> <br />..- <br /> <br />_..:~ <br /> <br />, <br /> <br />the Lee's Ferry gage at <br />approximately 11:30 am. Oil <br />Monday. This equated to a speed of <br />le8s than one mile per hour, The dye <br />was tl'ac~ to thf." Grand Canyon <br />gage, but at least two series of <br />nuctuating nows hod paseed <br />thl'ollgh the mM8 before it wa!l <br />recorded. No negative <br />environmental e(feels were noted <br />except for several red footprints at <br />the dam, and sevel'ol sels of red <br />toetl! <br /> <br />Recreation Surveys <br /> <br />Per801111el from HBHS and the <br />GCES Flap:staff oITice pel'ched <br />themselves above Three Mile Bar <br />and recorded the incidence of <br />boating accidents and accessibility <br />to the Glen Cunyon reach. VidPO <br />dot;umenlatiun and stage I"€'l:urds <br />were collected to conelate the <br />water level anti recl'eation <br />accessibility. <br /> <br />Glen Canyon ChaJUlel <br />Characteristics <br /> <br />A qualitfttive Rssessment WIHl lIIade <br />of the I'elatiollship between the <br />5,000 cf~ I'eleft~e and the aquatic <br />8ub~trale in the rivel' chllnnel <br />between Glen Couyun ond Lee's <br />Ferry (16 miles', Verificotion of tile <br />initial Glen Canyon l"l?ach map, <br />developed froUl the October 1984 <br /> <br />---~... <br /> <br />~~~~'J <br />J (1-1~ ~ ~ <br />~ <br />_tt <br /> <br />EPour"rtion "fcl~,""," 1fR',....>rpIk'J...SY m,d ,/n'1l ,II S,OOO..fs_ <br />