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<br />Arizona Game and Fish Department <br />Draft EA: Kanab Ambersnail <br /> <br />Site 2: Lower Deer Creek Spring <br /> <br />Description: Wet spring along densely vegetated <br />talus slope and floodplain (707 m'ls slagel marsh, <br /> <br />Jurbdidion: NPS-Grand Canyon National Park ' <br /> <br />Surveyed: JuI 28 and Nov 3,1996; Mar 19 and May <br />18,1998 <br /> <br />Site Aapect: south <br />Solar Elpoaure: early AM to late PM (Jan-Dee) <br />Annual BTUa/aq 1'1: 535,088 <br /> <br />Water Diacbarge (DI'I.): moderate <br />H1ttoric Mu Dlacbarge: uukuowu <br />Water TeDlp (oC): 17,6 med (minimax 16,0-]9,1) <br />Conductivity (uS): 910 med (minimax 820-1000) <br />Water pH: unlrnowu <br /> <br />Natural DiaturbllDce Potential: moderate <br />Natural Impact Evidence: flash flood debris in <br />floodplain marsh (from Marcb ] 996 flood) <br />Otber Diaturbanc:n: uoue <br /> <br />June 1998 <br />Page 34 <br /> <br />Location: Grand Canyon. river corridor <br />Coconino County. Arizona <br />RiverMHe: 136,1 RR(219,Okm) <br />Elevation: ,591 m <br />UTM: N40279]6. E364729 <br />7.5min Topo Quad: Fishtail Mesa <br /> <br />Ac....ibiIity: easy--boat <br /> <br />Geologic Strata: T apeats Sandstone <br />Predominant Subatrate: soil/loam <br />UtterlDulT: medium density <br /> <br />SoU Temp ("C): 24,0 median (minimax 13,0-25,0) <br />SOU Moi.ture (% lat): 97 med (minimax 90-100) <br />SOU pH: 6,6 median (minimax 6.0-6,8) <br />SOU Deptb (em): 19 median (minimax 15-20) <br />Slope (deg_I): 7 median (minimax 1-10) <br /> <br />Eltlmated Recreational U .e: none <br />Recreation Impact Evidence: minor trampled veg <br />NPS Recreation Estimate: ]00-200 visitors/day at <br />the riverside waterfall and slot canyon'--unlikely to <br />visit spring (3 m below trail, ringed by poison ivy) <br /> <br />Primary Vegetation &: Eatlmated Area: Typha spp, (>20 m'), Nasturtium spp. (>20 m'). and Mimulus glunatus (10 <br />m'), Mimulus cardinalis (on upper slope >60 m') <br /> <br />A..ociated Vegetation: Adiantum capillus-veneris. Carex spp.. Equisetum spp.. Juncus spp.. &irpus spp" <br />Phragmiles australis, Populusfremontii. Salixexigua. Toxicodendron rydbergii <br /> <br />MoUu....: succineids--Calinella spp,; pbysids--Physa (=Physella) spp' <br /> <br />Otber Invertebrates: aracbnids--(undescribed sp.); bomopterans--(undescribed leafhopper sp,); bymenopterans; <br />lepidopterans--Papilionidae Papilio; odonatids--Aeshnidae Ana< junius. Coenagrionidae; <br /> <br />Site Status: Floodplain marsh threatened by high flow releases from Glen Canyon Dam, but vegetated slope is <br />protected from natural and recreational impacts, HI!; three types of primary vegetation in abundance, but lacking a <br />diverse invertebrate commonity, Presence of poison ivy keeps visitors out of spring babitat. <br /> <br />KAS Establisbment Recommendation: More desirable babitat. <br /> <br />References: 'unpublished NPS data (Jalbert 1997); 'Stevens et ai, 1997, <br />