6900 WETMORE AVE MADISON COMMUNITY CHURCH 2018-01-01 MF Import

5—Alderwood�Urban I�nd complex, 2 to E perc�nt sbpes. This map unft is on till plains. Areas aie irregular in shape and are 100 to 1,000 acres in size. The native vegetation is mainy conifers. Elevation is 50 to 550 feet The average annual precipitation is about 40 inches, the averege annual air temperature is about 50 dec�rees F, and the average host•free season is /70 to 190 days. This unit is about 60 percent Alderwood gravelly sandy loem and about 25 percent Urban land. The components of Mis unit are so intricatery intermingled that it was not prectical to map them separatey at the scale used. Included in this unit are small areas of McKenne and Norme soils and Terric Medisaprists in depressional areas and drainageways on plains. Also mcluded are small areas of soils that are very shallow over a herdpan; small areas of Everett, Indianola, and Ragnar soila on terraces and outwash plains; and soils that have a stony and bouldery surtace layer. Included areas make up about 15 percent oi the total acreage. The Alderwood soil is moderately deep over a hardpan and is moderately well drained, It formed �n glacial till. Typically, the suAace layer is very dark greyish brown gravelly sandy loam about 7 inches thick. The upper part of the subsoil is dark yellowish brown and dark brown very gravelly sandy loam about 23 inches thick. The lower part is olive brown very gravelly sandy loam about 5 inches thick. A weakly cemented hardpan is at a depM ol ebout 35 inches. Depth to the hardpan ranges from 20 to 40 inches. Permeability of the Alderwood soil is moderately rapid above the hardpan and very slow through it. Available water capaciry is low. ENective rooting depth is 20 to 40 inches. Runofl is slow, and the hazard of water erosfon ie slipht A seasonal perched water table is at a depM of 18 to 36 inches hom January to March. Urban land is areas that are covered by sbeets, buildings, parkinp lots, and other structures that obscure or alter the soils so that identficatlon is not possible. The Aldenvood soil in this unit is used mainy for perks, building sites, lawns, garde�s, and woodla�d. The main limitations of the Aldenvood soil for homesites and septic tank ebsorption fields are the depth to the hardpan and the seaaonai perched water tsble. Onsite waste disposal systems oRen teil or do not functlon properly during periods of high rainfall. Drainaqe ia needed R buildings with basements and crawl spaces are consWcted. Topsoil needs to be stockpiled durinp slte preparation end subsequently used to cover the expaed meterial. AddRions of fertilizer and peat are desirable prior to seeding grass for lawns. This map unit is in capability subclass IVe. SCS SOILS DESCRIPTION