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Tablc 1-5.� hhdrologic Soil Groups for Soils �n thc E�crctt Arca <br />Soil l'��g <br />—'—� Aldcrn�ood <br />Bcllincham <br />Cathcart <br />Custcr <br />Lvcrctt <br />(ndianola <br />f:itsap <br />Lvnm�ood <br />iti1cl�cnna <br />��4ukiltco <br />Nonna <br />Pastik <br />Pugct <br />Pu��allup <br />Snohomish <br />Sumus <br />Tokul <br />V�I�inston <br />Hvdroloeic Soil Group Classifications <br />�-I�'drolueic Soil Ciroi�� <br />C`—�_ <br />\ <br />C <br />C <br />C <br />A <br />A <br />C <br />A <br />D <br />D <br />D <br />C <br />C <br />B <br />D <br />C <br />C <br />A <br />A. Lo��� runoffpoten[ia.'. Soils lia��ing high infiltratiun rates. c�en �chen d�urou��hl� <br />��etted, and consisting chicfl�� ofdcep. well-to-excessiveh• dr;tincd sands or <br />gra��els. Tlicsc soils have a l�igh ratc of �cater transmission. <br />B. �lodcmtcl}• lo�� runofl potcntial. Soils having moderatc inn"Itradon r�tcs �vhcn <br />d�oroughl�� wetted, and consisting chiefl�� of modcratch� fine to modcrateh <br />coarse [cxtures. Tliese soils ha��c a modcratc ratc of �aater transmission. <br />� AtoderatclJ• high runoffpotential. Soils hnving slo�v infiltration rates whcn <br />thorouchl� wettcd, and consisting chiefl}� of soils �vith a laver that impedes <br />dowm��ard movemcnt of �cater or soils ��ith moderatcl} fine [o fine testures. <br />These soils have a slw�� rate of �cater transmission. <br />D. High runoffpotential. Soils having �-en� slo«� infiltration rates �vhen thorouchh� <br />���etted and consisting chicfl}• of cla�� soils �aith a hieh s��elling potcntial, soils <br />��ith a pemianent high «•atcr tnble, soil; «ith a hardpan or cla�• ia��cr at or ncu <br />thc surface. and shallo��• soils o�•er ncarh� impcn ious matcriaL Thcsc soils <br />have a � en� slo�c ratc of �cater Vansmission. <br />1-�-32 <br />