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Northern San Isabel and Western Pike National Fores:s.Colorado <br /> USE AND MANAGEMENT CONSIDERATIONS Ecological Land Unit: 795S—Douglas-fir and <br /> Major uses: homesites, timber harvest, firewood lodgepole pine on montane and subalpine <br /> harvest, limited livestock grazing, wildlife habitat, canyons, hills. and mountains. <br /> and watershed. MAP UNIT SETTINGS <br /> Mass movement potential: <br /> Landslides: low. Location: mountainous areas where granitic rocks <br /> Debris flows: low. predominate. <br /> Snow avalanche: low. Landform: canyons. hills, and mountains. <br /> Sediment delivery efficiency: high. Parent material: residuum <br /> Road and trail limitations: Geologic symbol: Yg, Yp, Xg, and YXg <br /> Cut and fill slope stability Elevation range: 8,500 to 10.500 feet. <br /> Legault: slight. Aspect: all. <br /> Improved unsurfaced roads: Climatic zone: montane and subalpine. <br /> Legautt: slight. Mean annual precipitation: 16 to 30 inches. <br /> Offroad vehicle roads and trails: Mean annual air temperature: 34°F. to 44°F <br /> Legault: moderate-severe erosion hazard. Average annual snowfall: 100 to 300 inches. <br /> Foot trails and paths: COMPOSITION <br /> Legault: severe- severe erosion hazard 85 percent Legault and similar soils. <br /> Revtgetation limitations: <br /> Legault: severe-severe erosion hazard, low Contrasting inclusions <br /> available water capacity, low inherent fertility, 10 percent cliffs. <br /> and shallow depth to soft bedrock. 5 percent deep soils on swales and toeslopes. <br /> Re vegetation considerations: Trees are slow to TYPICAL PROFILES: <br /> return after a disturbance. Planting grasses and <br /> forbs have the best chance of success. Mulch or Legault <br /> similar treatment will protect the soil from erosion, Surface covering layer <br /> help conserve soil moisture, and protect 1 to 0 inches-conifer litter. <br /> emerging plant seedlings. Surface layer(s): <br /> Timber management considerations: Limited by 0 to 2 inches - brown, very stony loamy sand <br /> severe erosion hazard, windthrow hazard. and Subsurface layer(s): <br /> low available water capacity. Plant trees that are 2 to 11 inches-very pale brown, very gravelly <br /> drought tolerant or revegetate with grasses and loamy sand. <br /> forbs. Trees to plant include lodgepole pine and Substratum layer(s): <br /> Douglas-fir 11 to 16 inches- brownish yellow, extremely <br /> Wildlife management considerations: This map gravelly loamy coarse sand. <br /> unit provides shelter and limited food during Weathered bedrock: <br /> summer through fall months. Thinning or creating 16 to 60 inches - soft granitic bedrock (grus). <br /> small openings in the overstory canopy cover can SOIL PROPERTIES AND QUALITIES <br /> stimulate understory productivity <br /> Legault <br /> Other management considerations: Effective rooting depth: less than 20 inches. <br /> Manaoement activities are limited by severe Drainage class: excessively <br /> erosion hazard. Douglas-fir is dead or dieing in Depth to seasonal high water table: greater <br /> some areas due to disease and infestation Fires than 6 feet. <br /> can be extremely hot where standing dead timber Available water capacity: very low. <br /> occurs. This can reduce the success of natural Permeability: very rapid. <br /> reveoetation. However, standing dead timber Runoff: rapid. <br /> provides wildlife habitat and shade for understory <br /> canopy cover establishment. VEGETATION <br /> Acid precipitation buffering capacity: low Potential natural communities: <br /> Legault: Douglas-fir!kinnikinnick-common I <br /> juniper (Psme!Arad1-Juco) and lodgepole <br /> Map Unit: 795S—Legault family, 40 to 65 percent pinelkinnikinnick (Pico/Aradl). <br /> 'g,t., slopes. <br /> Page 137 DRAFT 4,27/95 <br />