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<br />11 "j ", ,) r..:0 #.;;~ <br />ub .. f,..:.~l t;t'3;~9 <br /> <br />t~~ <br /> <br />;1 <br /> <br />RAINBOW BRIDGE HATIOilAL ~lONUMENT <br /> <br />Rainbow Bridge Monitoring Report <br /> <br />STATUS REPORT #5 <br /> <br />,Canyon beyond Rainbow Bridge. <br />on December 31, 1974. <br /> <br />The reservoir was at elevation 3648.27 <br /> <br />f;~f.r~:t, <br /> <br />~ <br /> <br />~.:~~:;-;~ <br />.:.:.~;~.:,':". <br />I <br /> <br />i$i;'~' <br /> <br />I <br /> <br />This is ,Status Report No. 5 on the monitoring program of Rainbow <br />Bridge Ilational Nonument covering the period from January 1975 <br />to October 1975. During this period Lake Powell rose to a maximum <br />elevation of 3674.93 on July 25, 1975, an increase from the previous <br />maximum of 3667.38 on July 31, 1974, of 7.55 feet. The reservoir <br /> <br />at this elevation reaches approximately 800 feet up Bridge Creek <br /> <br />Average air and water temperatures were 61.87 and 61.95 in, the subject <br />area. Relative humidity equipment was ineffective this period. Average <br />wind speed and direction was 16.29 mph and 12.92 degrees. <br /> <br />GENERAL <br /> <br />The current monitoring represents the fi rst complete cycle spanning <br />a peri od bet\'leen reservoi r pa rti a 1 fill i ngs and therefore it becomes <br />a very informative set of data even though des i gn reservoi r capacity <br />of elevation 3700' has not been reached. Specifically, the current <br />surveys and photogeology data show that the reservoir action has had <br />no adverse effect on the structural integrity of RainbOl~ Bridge or <br />Bridge Creek Canyon. <br /> <br /> <br />.....""- <br />:Pf~:::~:~ <br />it~.<.; <br />{S;:;ii~ <br /> <br />.;.--.: ~ <br /> <br />,~~\~;;{~ <br /> <br />~fit&~~~~~V:t~!i~~"~.~~~wlf~~i:.~.~~~ <br />