500 LAUREL DR 2016-01-01 MF Import

Geotechnical Engineering Study Page 6 00-2267 Three Story Addition - 500 Laurel Street, Everett January 31, 2001 SITE C()NDITIONS Surface The site is located a;ong the crest of a steep bl�.ff slope, just downslope of Laurel Street and overlooking Possession Sound in Everett, Snohomish County, Washington (see Plate 1). The property is bounded to the northeast and south by existing residential development. To the southwest there is steeply slo,r,;ng and currently undeveloped and partially wooded property. i he site is currently occupied by a residence located approximacely in the center of the property. There is a shori and relatively gentle siope down from the e�:�e of Laurel Street to the house. We estimate this slope exhibits a topographic change of about three to five Fee± over a horizontal distance of between about ten ('�0) and eighteen (18) feet. This area, as well as the "side yards" to the north and south of the residence, is covered with sod lawn, and supports some landscaping and several trees. The area of the proposed addition, alcng the rear (westem) side of the residence, currently comprises a relatively flat and level gravel covered driveway and vehicle "turnaround." The existing garage is accessed off this driveway at the rear of the basement level of the house. Extending off the southwestem end of the garage there is a short concrete retaining wall that curves out to meet a higher retaining wall along the western end of the driveway ;see Plate 2). This retaining wall increases in height from about six feet at the southwestem comer up to about seven and o�e half feet at the northwest comer wl-�ere it makes a right-angle tum, then up to about ten (10) feet at the northeastem property line. Beyond the westem perimeter chain link fence and the above-described concrete retaining wall there is a short relatively flat "plateau-like" area which ranges between about five and eighteen (18) feet in width. At the edge of this "plateau-iike" area, which forms the crest of the sites' westem bluff slope, the slope drops away at an almost vertical inclination for a heiglit of about nineteen (19) feet. From the toe of the near vertical bluff the slope extends down towards the r�ilroad right-of-way located along the toe of the slope about one hundred and twenty ('120) feet below. This central poition of the western slope is inclined at a gradient of about 1H:1\/ V