Laserfiche WebLink
April 10, 2005 <br />Proposed Single-Plmily � esidencc <br />I,&A Job No. SA019 <br />P�ge 3 <br />'rhe site is currenUy vacant nnd undeve]opeJ. It is overgrown with brush and grass, and is dotted <br />with scattered trees on its norUi and south sides. <br />GLOLOGIC SrTTING <br />The Prcliminnrv Geoloaic A9ap of the �verett 7.5-Minute Ouadran�le Snohomish Cowitv, <br />�'�'ashin ��, by Jnn?c� Y. Alinarcl, published by U. S. Gcological Survey in 1985, was referenced <br />for the geologic and soil conditions �t Uie site. According to this publicatiou, the surficial soil <br />unit at and in the vicinity of the suUject property is mapped as Transitional Beds �Q��) deposits. <br />This soil unil is nonnally ovcrinin by Advancc Outwash (Q��) deposit. <br />"1'hc geology of thc Pugct Sound Lo�vland has bccn modified by t6e advancc and relre�t of <br />scveral glacicrs in thc past and subscque��t deposits and crosion. The ]atest glacier ad��anccd to <br />the Pugel Sound Lowland is refened to as the Vasl�on Slade of the I�raser Glaciation, �vhich h�s <br />oceurred during ihc l�itcr stages of the Ylcistocene Bpoch and retrcaled from the rcgion somc <br />14,500 ycros ago. <br />The Transitional 13eds are gl�icial and non-glaci�l deposits �.mderlying the sand of ll+e V�shon <br />ach�ance ouhvash. 7�he}� consisl mosUy of massive, very-stiff to hard, thick or thin beds and <br />laminac of gray to dark-gray clay> silt and Gnc tu very-finc s1nd. This soil unit, ho�vcvcr, was not <br />encnuntered over thc deplhs of lhe our backl�oe tesl pils dug on the site. <br />The Ach�,mcc Outwash soil unit is of s�ratificcl sand and gravcl ���ith minor amounts of silt and <br />clay, deposiled by the melhvater of acbancing glaci�l ice. Due to its gencrally gramilar <br />composition, thc Advance Ouhv<�sh deposils are of moderately l�igh permenbility and generall�� <br />d�.1in wclL 7'he Aclvance Out�vash soils are glacially overridden and is gener�lly dense to vcry <br />dense in its nattu•ni, undisturbed st�tc, except the top 3 to 5 feet where exposed which may be <br />���c,ithcred to ,� loose to medium-dense stnte. The Advance Ouhvash deposits can stand in steep <br />L1U & ASSCCIAT�S, INC. <br />