801 E CASINO RD 2019-02-01 - Laserfiche WebLink

those on south-and southwest-facing slopes.When water capacity is low. Effective rooting depth is 20 to 40 openings are made in the canopy,invading brushy plants, if not inches. Runoff is rapid, and the hazard of water erosion controlled,can delay the establishment of seedlings. is high.A seasonal perched water table is at a depth of 18 Because the rooting depth is restricted by a cemented pan in to 36 inches from January to March. Springs or seep areas the Alderwood soil,trees are subject to windthrow. are common. The main limitations of the Alderwood soil for septic tank The Everett soil is very deep and somewhat excessively absorption fields and homesites are steepness of slope and drained.it formed in glacial outwash.Typically, the surface a seasonal perched water table. Effluent from absorption layer,where mixed to a depth of about 6 inches,is very dark fields flows laterally above the pan and can seep at the grayish brown gravelly sandy loam.The subsoil is dark brown bottom of slopes. Drainage is needed if buildings with very gravelly sandy loam about 12 inches thick.The upper basements and crawl spaces are constructed. This soil part of the substratum is brown very gravelly loamy sand sloughs readily when saturated. about 5 inches thick. The lower part to a depth of 60 inches The main limitations of the Everett soil for septic tank or more is dark brown extremely gravelly sand. absorption fields are steepness of slope and seepage. If the Permeability of the Everett soil is rapid. Available density of housing is moderate to high,community sewage water capacity is low. Effective rooting depth is 60 inches or systems are needed to prevent contamination of water more. Runoff is rapid, and the hazard of water erosion is supplies as a result of seepage from onsite sewage disposal moderate. systems. Road cuts tend to slough readily. This unit is used mainly as woodland and for wildlife To protect the soils in this unit from erosion during habitat. It is also used for urban development, construction, disturbed areas need to be seeded and Douglas-fir is the main woodland species on the runoff should be controlled. Alderwood soil. On the basis of a 100-year site curve, the This map unit is in capability subclass Vile. mean site index is 142. On the basis of a 50-year site curve, the mean site index is 108.The mean annual increment at 5-Alderwood-Urban land complex, 2 to 8 percent culmination(CMAI)for Douglas-fir at age 65 is 146 cubic feet per slopes.This map unit is on till plains.Areas are irregular in acre. shape and are 100 to 1,000 acres in size.The native Douglas-fir is the main woodland species on the Everett vegetation is mainly conifers. Elevation is 50 to 550 feet.The soil. On the basis of a 100-year site curve, the mean site average annual precipitation is about 40 inches,the average index is 141, On the basis of a 50-year site curve, the mean annual air temperature is about 50 degrees F, and the site index is 111. The mean annual increment at culmination average frost-free season is 170 to 190 days. (CMAI)for Douglas fir at age 65 is 146 cubic feet per acre. This unit is about 60 percent Alderwood gravelly sandy Among the trees of limited extent on this unit are loam and about 25 percent Urban land.The components of western hemlock, western redcedar,and red alder. Among this unit are so intricately intermingled that it was not the common forest understory plants are salal,evergreen practical to map them separately at the scale used. huckleberry, brackenfem, red huckleberry,common rose, Included in this unit are small areas of McKenna and and Oregon grape. Norma soils and Terric Medisaprists in depressional areas The main limitation for the harvesting of timber is and drainageways on plains.Also included are small areas of steepness of slope. Slope restricts the use of wheeled and soils that are very shallow over a hardpan; small areas of tracked equipment in skidding operations;cable yarding Everett, Indianola, and Ragnar soils on terraces and systems generally are safer and disturb the soils less. outwash plains; and soils that have a stony and bouldery Harvesting systems that lift logs entirely off the ground surface layer. Included areas make up about 15 percent of reduce the disturbance of the protective layer of duff. the total acreage. Logging roads require suitable surfacing for year-round use. The Alderwood soil is moderately deep over a hardpan Rock for road construction is not readily available on this and is moderately well drained. It formed in glacial till. unit. Establishing plant cover on steep road cut and fit!slopes Typically, the surface layer is very dark grayish brown reduces erosion.Steep yarding paths,skid trails,and firebreaks gravelly sandy loam about 7 inches thick.The upper part of are subject to rifling and gullying the subsoil is dark yellowish brown and dark brown unless adequate water bars are provided or they are very gravelly sandy loam about 23 inches thick. The lower protected by plant cover. part is olive brown very gravelly sandy loam about 5 inches Seedling mortality is the main limitation for the production thick.A weakly cemented hardpan is at a depth of about 35 of timber. Reforestation can be accomplished by planting inches. Depth to the hardpan ranges from 20 to 40 inches. Douglas-fir seedlings.If seed trees are present,natural Permeability of the Alderwood soil is moderately rapid reforestation of cutover areas by red alder occurs periodically. above the hardpan and very slow through it.Available water The high temperature and low moisture content of the Everett capacity is low. Effective rooting depth is 20 to 40 inches. soil during the growing season cause high mortality of Runoff is slow, and the hazard of water erosion seedlings, especially