1231 MADRONA AVE 2016-01-01 MF Import

� ('eo/neiclm�•stiraliott and Geotechnical EnAinecrrnr Reporf r 97-01-20 1239,11adrona Ave. - I.ot 2 � L•'vere(f, IVashington have been mapped by the USGS and published in the Geologic Map of the Everett and Hlukilteo Quadrarigles, Snohonrish Coenty, Washrngto�r by J.P. Minard dated 1985. For reference purposes, a ` copy of a portion of tlus map containing the project site has been included as a Geologic Map in Appe�rdix C of this report. I 1 3.3 Site S[rafigraahv � Site stratigraphy has been interpreted from the soil informntion collected during our field investigations � and correlated with the roapped geology of the area. Access to the site and existiug improvements limited subsurface site investigation locations. Tluee (3) test holes were hand augured at locations � selected by GES, Inc. Tlie locations of the explorations are sl�own on the Site Map contained in Appeirdix B of this report. The site explorations were located in such a manner as to provide optimum Iinformation conceming the shallow subswface soil condidons at the time of e�cplorations. Tl�e soil &om the explorations were logged by aa engineering geologist from GES, Inc. as they were beiug excavated. ISoil descriptions were developed following the Unified Soil Classification (U.S.C.) format. Copies of the U.S.C. format and tl�e Hand Auger Logs are contained in Appe�:dices D and E, respectively, Ilocated at tUe end ofthis report. � As sUown on the Geologic Map, the site lies in an area mapped as Transitional Beds (Q�b). Transitional Beds (Qtb) consist of dense to very dense, interbedded to massive silts and sands that were laid down t_ as the Fraser aged glaciers receded and tUan re-advanced through the Puget Sow�d basin. The materials ( have been overconsolidated by tl�ousands of feet of glacial ice. In general, widisturbed soil Gom within Ithe Transitional Bed (Q�b) wiits exhibit excellent engineering characteristics for foundation support and I seismic stability. Engiueering characteristics are not quite as good for these units when exposed in steep slopes/ cuts or where ground water is present. Evidence of recent movements within these beds along � e�.�osed slopes can be seen all aroimd the Riget Sound region from the December `96/January `97 stornis. SLallow movements and surficial sloughing of exposed soil occurred along the bluff in the immediate viciniry of tl�e site during tlie December `96/January `97 storm event. 5 GES, Inc. l�J