6907 COLUMBIA CT 2016-01-01 MF Import

N DAVID L. NELSON AND ASSOCIATES, INC. ��i Contulting Enginecring Geology 6i May 31 , 1991 � Project No. e"9i Page 2 ra I All elevations mentioned in thi� report refer to existing grade, and to site Gi topography shown on a map prepared by Gerald R. Crane, PE, dated March 1991 . I Site layout used for this report is also shown on this map. �A LOCIITIC N 8 SITE DESCRIPTION �� The site consists of lot 2 of the proposed Cox Short Plat N19-91 , which is located at 6911 Columbia Court, in the Pinehurst area of Everett, Washington. `� Lot 2 is located in a residential area just east of the existing residence in I Lot 1 . The site is currently undeveloped. Vegetation consists primarily of ��; grass, underbrush and various sized evergreen and some deciduous trees. � Topographically, the site is relatively flat lying along the upslope westerly and northe•.:y portion of the site. The site then slopes moderately down � towards the southeast above the 7-5 right-of-way. The gradient below the top of slope was hand measured in the field at 30 degrees from the horizontal. ryt This contrasts from the data shown on the site topoqraphy �ap which indicates li a slope angle on the order of 22 deqrees at the steepest point. The slope continues down the hill, off of the property to the I-5 right-of-way. The �r proposed duplex structure is planned to be located primarily on the upslope flat portion of the lot, with the easterly portion of the dunlex extendinq � over the top-of-slope. � SOILS CONDITZONS � The ::ubsurface soils stratigraphy can best be seen on the enclosed test pit logs. In general, the site was found to be underlain at depth by dense � glacial till deposits, with local areas of overlying glacial outwash deposits and thin surficial artificial fill. � The basal native deposits encountered within all of the test pits consist of � grey, dense to very dense, poorly sorted silty sand with gravel, considered �