Laserfiche WebLink
<br /> <br />n-2"- <br />u>.i ~J' <br /> <br />. <br /> <br />. <br /> <br />'. <br /> <br />~oodlol.~rd-C...!L<!.e - Jim Irish. Chief En~;ineer; Roy Spitzer. Survey Chief <br /> <br />\o1-C' oS job is t.o dcLl.!rmine the adequacy of the rock at proposed dam <br />sites to hold dams and reservoirs. Exploration work 1s about half <br />done (core drilling); no engineering rock-related problems have <br />ueen round yet. <br /> <br />Earthquake potential is minor to modccatc; there is. however. <br />growing evidence that the Rocky Mountain area is just in a quiet <br />I.:ra oC earthquake activity. <br /> <br />Cross Nauntain Site <br />Limestone (420 million yrs) underlain with sandstone (500 million <br />yrs); l;IYl.on..d. <br />Broken/porous openings in rocks at layer joints may result in <br />"moderate to minor" water loss. <br />t.Jest Cross :1ountain Fault (multitude thousand feet uplift) shows <br />nu n.'l.:t..'nl mUVl..lUcnt (:;'l..!vf.:ral willian years). <br /> <br />Juniper Site <br />Rocks .,bout 100 mi.llion years younger than Cross Mountain site; <br />IIU t..'viJencc lhat lhey ,",uuhln' t hold a rcs~l-vior. <br />E.uly stage of drilling now - only 1 of about 8 holes completed. <br />USt:R had looked at anotller site farther east in the canyon _ <br />.,n :In.'',, wh~rc rock is qui te [r;lctured. <br /> <br />PROJECT.OP~RATION AND HYDROLOGY <br /> <br />J~UA\.J <br /> <br />Two issues related to project operation are being studied: <br />1) Effects or flow changes on whitewater rccreation. <br />2) Effects of flow changes on endangered fish (ERT-ECI). <br /> <br />Rafting: <br />high <br /> <br />Possibility to <br />spring flows. <br /> <br />expand rafting season at the expense of <br /> <br />EnJan~~rf.:d Fish: Concerned with effects of flow changes on sediment <br />]o~d. river channel form, and temperature; felt lowered water <br />temperature associated with most reservoirs could be mitigated <br />by drawing from reservoir surface via multi-level outlet (did <br />nOl indicate any concern that high spring flows themselves may <br />be critical for reproduction downstream - SJP). <br /> <br />IECO <br /> <br />No further comments <br /> <br />3 <br />