6300 MERRILL CREEK PKY BASE FILE 2018-01-01 MF Import

i 9 ( i � � detailed soil map units � 1 The map units on the detailed soil maps at the back of This survey includes mrsce!laneous areas. Such areas this survey represent the soils in the survey area. The have little or no soil material and support lirile or no map unit descriptions in this section, along with the soil vegetation. Pits is an example. Miscellaneous areas are maps, can be used to determine the suitability and shown on the soil maps. Some that are too small to be q potential of a soil for specitic uses. They also can be shown are identified by a special symbol on the soil � used to plan the management needed tor those uses. maps. More information on each map unit, or soil, is given Table 4 gives the acreage and proportionate extent of under "Use and management of the soils." each map unit. Other tables (see "Summary of tables") � Each map unit on the detailed soil maps represents ar. give properties of the soils and the limitations, area on the landscape and consists of one or more soils capabilities, and potentials for many uses. The Glossary for which the unit is named. defines many of the terms used in describing the soils. A symbol identifying the soil precedes the map unit � name in the soil descriptions. Each description includes me untt descriptions general facts about the soil and gives the principal hazards and limitations to he considered in planning for �—p�derwood gravelly sandy loam, 2 to 8 pereent specific uses. slopea. This moderately well drained soil is on till plains. � Soils that have profiles that are almost alike make up It is moderately deep over a hardpan. The soil formed in a sail series. Except for diHerences in texture of the glacial till. Areas are irregular in shape. They are about surface layer or of the underlying material, all the soils of �00 acres in size. The native vegetation is mainly I a series have major horizons that are similar in conifers and hardwoods. Elevation is 50 to 550 feet. The composition, thickness, and arrangement. average annual precipitation is about 40 inches, the Soils ot one series can diHer in texture of the surtace average annual air temperature is about 50 degrees F, layer or ot the underlying material. They also can diNer in and the average frost-iree season is 170 to 190 days. slope, stoniness, salinity, wetness, degree oi erosion, Typically, the surtace layer is very dark grayish brown and other characteristics that aHect their use. On the gravelly sandy loam about 7 inches thick. The upper part basis of such differences, a soil series is divided into soil of the subsoil is dark yellowish brown and dark brown phases. Most ot the areas shown on the detailed soil �ery gravelly sandy loam about 23 inches thick. The maps are phases of soil series. The name of a soil lower part is olive brown very gravelly sandy loam about phase commonly indicates a feature that affects use or 5 inches thick. A weakly cemented hardpan is at a depth management. For example, Alderwood gravelly sandy of about 35 inches. Depth to the hardpan ranges irom loam, 2 to 8 percent slopes, is one of several phases in p0 to 40 inches. � the Alderwood series. Included in this unit are small areas of soils that have I Some map units are made up of two or more major a stony or bouldery surface layer and areas of McKenna soils. These map units are called soil complexes. soils, Norma soils, and Terric Medisaprists in A soil complex consists of rivo or more soils in such drainageways on plains. Also included are small areas of an intricate pattern or in such smell areas that they cannot be shown separately on the soil maps. The Everett. Indianola, and Ragnar soils on terraces and pattern and proportion of the soils are somewhat similar outwash plains. Included areas make up about 15 in ail areas. Getchell-Oso complex, 15 to 30 percent percent o(the total acreage. I slopes, is an example. Permeability of this Alderwood soil is moderately rapid Most map units include small scattered areas of soils above the hardpan and very slow through it. Available � other than +`�se for which the map unit is named. Some water capaciry is low. Effective rooting depth is 20 to 40 oi these included soils have properties that diHer inches. RunoH is slow, and the hazard of water erosion substantially trom those of the major soil or soils. Such is slight. A seasonal perched water table is at a depth oi diHerences could significantly attect use and 18 to 36 inches from January to March. management of the soils in the map unit. The included This unit is used mainiy for urban development and as Isoits are identified in each map unit description. Some woodland. It is aiso used for hay and pasture. small areas of strongly contrasting soils are identified by Douglas•fir is ihe main woodland species on this unit. a special symbol on the soil maps. On the basis of a 100-year site curve, the mean site I