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Shc and ecological faro) unit surrey <br />Foot Yralis and paths: <br />Moran: slight <br />Cryaquolia: severe- high water table and <br />saturated soil. <br />Hitstosois: severe- high water table and <br />organic materials. <br />Revetletatlon iimitadons: <br />Moran: severe- short growing season, low <br />available water capacity and low inherent <br />fertility. <br />Cryaquoika: severe-short growing season and <br />hiclh water table. <br />Histosois: severe- short growing season; <br />onlanic material takes thousands of years to <br />replace. <br />Revegetaiton conslderaUons: Cold tolerant <br />plants are required to survive alpine climate. <br />Mule or similar lieatment will protect the soil <br />from erosion, help conserve soil moisture, and <br />proUact emerging plant seedlings. Revegetating <br />Cryatquolls sail with riparian vegetation requires <br />maintaining a high water table. Histosois <br />revegetation requires high water table and <br />replacing organic materials. <br />wlld-iYe management consideratlons: This map <br />unit provides food, shelter, and water to upland <br />game animals. Where streams occur, this map <br />unit provides aquatic habitat <br />Other management consideratYons: <br />Management activities require buffer zones to <br />proU3ct riparian habitat <br />Acid precipitation bulfiering capacity: low. <br />Map I1nit: 985A-Moran family, 40 to 65 percent <br />slopes. <br />Ecolagtcal Land Unit: 965A-alpine grasses, <br />sedges, and forts on alpine mountains. <br />MAP UNIT SETTINGS <br />LocalYon: alpine areas where igneous an <br />mep;tmoryhic rocks predominate, <br />Landl`onn: mountains. <br />Parent material: residuum and colluvium. <br />Geokigfc symboh. Tmi, Xb, Xfh, Xg, Yg, and Yp. <br />E/avatlon range: 11,600 to 13,000 feet <br />Asper: all. <br />Gima~tfc zone: alpine. <br />Mean annual procipftation: 30 to 50 inches. <br />Mean annual ak temperature: 34°F. to 38°F. <br />Average annual snowfall: 300 to 500 inches. <br />COMPOSITION <br />8S percent Moran and similar soils. <br />GOnvastirrg 1RCltlaion8 <br />10 percent cliffs and talus. <br />5 percent shallow soils on convex slopes. <br />TYPIGAL PROFILES: <br />Moran <br />Surface layer(s): <br />0 to 2 inches -dark grayish brown, grave0y <br />sandy loam. <br />2 to 10 inches -brown, gravelly sandy loam. <br />Subsoil layer(s): <br />10 to 20 inches -yellowish brown, very gravelly <br />sandy loam. <br />20 to 32 inches -light yellowish brown, vary <br />cobbly sandy loam. <br />Substratum layer(s): <br />32 to 60 inches -light olive brown, very cobbty <br />sandy loam. <br />SOIL PROPERTIES AND QUALRIES <br />Moran <br />Effective rooting d~dr: greater than 20 inches. <br />Drainage class: somewhat excessively. <br />Depth to seasonal high water table: greater <br />than 6 feet <br />Available water capadty: tow. <br />Permeability: moderately rapid. <br />Runoff: repid. <br />YEGETATiON <br />Potential natural communlNes: <br />Moran: kobresialgoiden evens-curly sedge <br />{KomylAcro-Caro) typical site and tufted <br />hairgrass/golden evens (l)ace/Acro) moist site. <br />Seral stages: dominated by plants of the <br />respective potential natural communities. <br />Present vegetation: dominated by plants of the <br />respective patentiai natural communities. <br />USE AND MANAGEMENT CONSIDERATIONS <br />Major uses: mining, recreation, scenic vistas, <br />wildli#e habitat, and watershed. <br />Mass movement potential: <br />Landslides: low. <br />Debris flows: low. <br />Snow avalanche: low. <br />Sediment delivery efBcisncy: high. <br />Road and haN ilmltadons: <br />Cut and 1rll slope stabllfty <br />Moran: slight <br />Improved unsurfaced roads: <br />Moran: slight <br />ONroad vehicle roads and veils: <br />Moran: severe- erosion hazard, surface <br />compaction, and rutting. <br />