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<br />.~ <br /> <br />OOll7.!.l <br /> <br />Survey monument movements greater than 2 inches would stop the reservoir draw down, <br />Additional data would be collected and evaluated to determine if the draw down could continue. <br /> <br />A review of reservoir operations from 1973 to present. shows that the end of day reservoir <br />elevations has not been lower than 7.140 ft since 1996. Table 1 shows the daily frequency of <br />reservoir elevation from 1973 to present between 7.102 ft. and 7.144 ft. <br /> <br />Small landslide movements are anticipated during the reservoir draw down and would have <br />minimal affect on downstream water quality if releases from Morrow Point Reservoir were <br />adjusted to allow sediment settling in Morrow Point and Crystal Reservoirs, <br /> <br />A sudden release of a large landside mass could increase sediments in Morrow Point Reservoir <br />and possibly downstream of Crystal Reservoir resulting in impacts to recreation and trout <br />spawning sites, Such an occurrence could also create a wave that could overtop Morrow Point <br />Dam and pose a safety threat to persons on the reservoir and immediately below the dam. <br />However. chances of large, (apid movements Olre considered to be very remote. <br /> <br />Fish and Wildlife Resources <br /> <br />The Gunnison River and its canyon walls support wildlife including beaver (Custor CUlladellSis). <br />mule deer (Odocoilell,' hell/iolllls). ringtail cat (BussarisclIs astlllus). great homed owl (Bubo <br />virginianlls). western fence lizard (Sce!opOrtlS occidel1lalis). yellow warbler (Delli/mica <br />petechia). rainbow trout (Ollcorln'l/chIlS I/n-ki.n) and brown trout (Salmo Iruttal (NPS 200 I). <br /> <br />The Colorado Division of Wildlife (CDOW) manages the tishery resource of the Gunnison River <br />below Crystal Reservoir. This stretch of river has an excellent rainbow and brown trout t1shery. <br />These populations Olre self-sustaining: however. whirling disease has greatly reduced recruitment <br />for ruinbow trout. The CDOW conducts an annual fOlIl (September) survey on the Gunnison <br />River below the BIOlck Canyon of the Gunnison National Park. CDOW stocks Morrow Point <br />Reservoir with Kokanee (Ollcorhynchus nerkus) and Colorado River cutthroat trout <br />(Oncorhynclls clarki plellriticlIs), Entrainment from Blue Mesa Reservoir also provides a <br />signiticant number of fish in Morrow Point Reservoir (Hebein. 200 I), <br /> <br />Fish species lists for both Crystal and Morrow Point Reservoirs are identical even though the <br />sources of species vary, These include Kokanee. Colorado River cutthroat troUI. rainbow trout, <br />brown trout. brook trout (Sa/l'elinllsfo/llinalis). possibly Snake River cutthroat trout <br />(Oncorhynclls clarki sp.). Mackinaw or lake trout (Sa/velinlls na/llaclISh). longnose sucker <br />(Catostomlls catoSIl/lllIlS). white sucker (CatoslOlI/uS comll/ersoni). bluehead sucker (Catostonllls <br />discoho/lIs). longnose dace (Rhinichthys earamell/e). and monied sculpin (COIlIlS hairdi), <br />Hybridized remnants of tlannelmouth sucker (Catostoll/lIS /atipinnis) may also be present <br />(McAda 2000. Hebein 200 I). <br /> <br />13 <br />