Laserfiche WebLink
Soil and ecological land unit survey <br /> Sera/stages: dominated by plants of the <br /> respective potential natural communities. shade for understory canopy cover <br /> establishment. <br /> Acid <br /> vegetation: dominated by plants of the precipitation buffering capacity: low. <br /> respective potential natural communities. <br /> USE AND MANAGEMENT CONSIDERATIONS <br /> Map Unit: 795Y—Legault family - Rock outcrop <br /> Major uses: wildlife habitat and watershed. <br /> complex, 40 to 150 percent slopes <br /> Mass movement potential: <br /> Landslides: low. Ecological Land Unit: 795Y--Douglas-fir and <br /> Debris flows: low. lodgepole pine on montane and subalpine, south <br /> Snow avalanche: low. facing canyons, hills, and mountains. <br /> Sediment delivery efficiency: high. <br /> Road and trail limitations: MAP UNIT SETTINGS <br /> Location: mountainous areas where granitic rocks <br /> Cut and fill slope stability <br /> Legault: severe- unconsolidated materials. predominate. <br /> Landform: canyons, hills, and mountains. <br /> Improved unsurfaced roads: <br /> Legault: severe-slope and severe erosion Parent material: residuum. <br /> hazard. Geologic symbol: Yg, Yp, Xg, and YXg. <br /> Elevation range: 8.500 to 11,800 feet. <br /> Offroad vehicle roads and trails: <br /> Legault: severe- slope and severe erosion Aspect: south. <br /> hazard. Climatic zone: montane and subalpine. <br /> Foot trails and paths: Mean annual precipitation: 12 to 30 inches. <br /> Mean annual air temperature: 34°F. to 44°F. <br /> Legault: severe- slope and severe erosion <br /> hazard Average annual snowfall: 100 to 300 inches. <br /> Revegetstion limitations: COMPOSITION <br /> Legault: severe- slope, severe erosion hazard. <br /> low available water capacity, low inherent 60 percent Legault and similar soils. <br /> 30 percent Rock outcrop. <br /> fertility, and shallow depth to soft bedrock. <br /> Revegetation considerations: Trees are slow to Contrasting inclusions <br /> return after a disturbance Planting grasses and 5 percent eroded soils on steep slopes. <br /> forbs have the best chance of success. Mulch or 5 percent deep soils on swales and toeslopes. <br /> similar treatment will protect the soil from erosion, i <br /> TYPICAL <br /> help conserve soil moisture, and protect PROFILES: t <br /> emerging plant seedlings Legault <br /> Timber management considerations: Limited by Surface covering layer <br /> siope, severe erosion hazard, windthrow hazard, 1 to 0 inches-conifer litter. <br /> and low available water capacity on shallow soils. Surface layer{s}: <br /> Plant trees that are drouoht tolerant or revegetate 0 to 2 inches-brown, very stony loamy sand. <br /> with crasser and fortis. Trees to plant include Subsurface layer(s): <br /> lodgepole pine. 2 to 11 inches -very pale brown, very gravelly <br /> Wildlife management considerations: This map loamy sand. <br /> unit provides shelter and limited food during Substratum layer(s): <br /> 16 <br /> summer through fall months. Thinning or creating 11 to el inches- brownish yellow, extremely <br /> small openings in the overstory canopy cover can gravelly loamy coarse sand. <br /> stimulate understory productivity. Weathered bedrock: <br /> 16 to 60 inches - soft granitic bedrock (gnus}. <br /> Other management considerations: <br /> Management activities are limited by slopes and SOIL PROPERTIES AND QUALITIES <br /> severe erosion hazard. Douglas-fir is dead or Legault <br /> dieing in some areas due to disease and Effective rooting depth: less than 20 inches. <br /> infestation. Fires can be extremely hot where <br /> standing dead timber occurs. This can reduce Drainage class: excessively. <br /> Depth to <br /> the success of natural revegetation. However, f seasonal high water table: greater <br /> standing dead timber provides wildlife habitat and than 6 feet. <br /> Available water capacity: very low. <br /> Permeability: very rapid. <br /> 1 <br /> Page 138 DRAFT 4/27/95 <br /> IP <br />