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jNorthern San Isabel and Western Pike National Forests.Coloraoo <br /> i Runoff: rapid. capacity on shallow soils. Plant trees that are <br /> Rock outcrop drought tolerant or revegetate with grasses and <br /> Landform: cliffs. forbs. Trees to plant include lodgepole pine. <br /> 1 Parent material: residuum. <br /> Rock type: granitic. Wildlife management considerations: This map <br /> unit provides shelter and limited food during <br /> Runoff: rapid. summer through fall months. Thinning or creating <br /> i VEGETATION small openings in the overstory canopy cover can <br /> stimulate understory productivity. <br /> Potential natural communities: Other management considerations: <br /> Legault: Douglas-fir/kinnikinnick-common Management activities are limited by slopes, rock <br /> i juniper{Psme/Arad!-Juco} and lodgepole <br /> pinelkinniklnnick (PicoJHrad1). outcrop, and severe erosion hazard. Douglas fir <br /> is dead or dieing in some areas due to disease <br /> Seral stages: dominated by plants of the and infestation. Fires can be extremely hot <br /> respective potential natural communities. where standing dead timber occurs. This can <br /> Present vegetation: dominated by plants of the reduce the success of natural revegetation. <br /> respective potential natural communities. However, standing dead timber provides wildlife <br /> USE AND MANAGEMENT CONSIDERATIONS habitat and shade for understory canopy cover <br /> Major uses: wildlife habitat and watershed. establishment. <br /> Mass movement potential: Acid precipitation buffering capacity: low. <br /> Landslides: low <br /> a Debris flows: moderate. <br /> Snow avalanche: moderate. Map Unit: 796M—Wahatoya-Sphinx families <br /> Sediment delivery efficiency: high. complex, 5 to 40 percent slopes. <br /> I Road and trail limitations: <br /> Cut and fill slope stability Ecological Land Unit: 796M—ponderosa pine on <br /> lower montane, dry. north facing upland plains, <br /> Legault: moderate-unconsolidated materials. hills, and mountains. <br /> Rock outcrop: moderate-cliffs and talus. MAP UNIT SETTINGS <br /> improved unsurfaced roads: <br /> Legault: severe-slope and severe erosion Location: mountainous areas where granitic rocks <br /> hazard. predominate. <br /> IRock outcrop: severe- cliffs and talus. Landform: upland plains, hills, and mountains. <br /> Offroad vehicle roads and trails: Parent material: residuum. <br /> Legault: severe- slope and severe erosion Geologic symbol: Yg, Yp, Xg, and YXg. <br /> Elevation range: 6.500 to 9,000 feet. <br /> 1 hazard. <br /> Rock outcrop: severe-cliffs and talus. Aspect: north. <br /> Foot trails and paths: Climatic zone: lower montane. dry. <br /> Legault: severe-slope and severe erosion Mean annual precipitation: 12 to 16 inches. <br /> 1 hazard. Mean annual air temperature: 40`F. to 48°F. <br /> Rock outcrop: severe-cliffs and talus. Average annual snowfall: 50 to 100 inches. <br /> Revenetation limitations: COMPOSITION <br /> ILegault: severe-slope, severe erosion hazard, 60 percent Wahatoya and similar soils. <br /> low available water capacity, low inherent 30 percent Sphinx and similar soils. <br /> fertility, and shallow depth to soft bedrock. <br /> ( Rock outcrop: severe-cliffs and talus. Contrasting inclusions <br /> Revegetation considerations: Trees are slow to 10 percent exposed bedrock. <br /> return after a disturbance. Planting grasses and TYPICAL PROFILES: <br /> forbs have the best chance of success. Mulch or <br /> similar treatment will protect the soil from erosion, Wahatoya <br /> help conserve soli moisture. and protect Surface layer{s}: <br /> emerging plant seedlings. 0 to 2 inches -dark grayish brown, gravelly <br /> i Timber management considerations: Limited by sandy loam <br /> slope. rock outcrop. severe erosion hazard. Subsurface layer(s): <br /> wlndthrow hazard, and low available water 2 to 9 inches- light brown, very gravelly sandy <br /> loam <br /> Page 139 DRAFT 4i27/95 <br /> I <br />