1231 MADRONA AVE 2016-01-01 MF Import

f � < <�� Geoloric /nve.ctix�n(ion nnd i;eotechnical Gneineerinu Retwr( 97-01-20 1??9 A-Iadrnna �I ve. -! nf 2 � lrcre((, !i'ashinglon Stability of cuts on this site will largely be controlled by t6e presence or absence of seepage and sarurated soil. Where seepage and ground water is encountered, we lrighly recommend that cuts over four (4) feet in [ieig6t be laid back to a maximum 1:3 (H:17 slope. Undisturbed soil may be cut to a ma�mum 1:6 (H: I� slope. Some spalling and raveling may be e�cperienced over time with the steeper cuts. We recommend that a representative of the geotechnical eagineer observe all cuts when first exposed and on a periodic basis there after. This inspection will conSrn� the consistency of materials with tl�ose er.countered during the initial site investigation as well as verify the appare��t safety of ihe cut. All cuts and excavations should be covered with visqueen and protected from rain, desiccation by the sun or erosion immediately after the irspection by GES, Inc. All excavations and cuts should be carefully watched and observed. If cracking or movement is observed, GES, Inc. should be contacted immediately to view the area and develop recommendations to remediate the problem. 4.5 Foundation Placement and DesiEn kecommendations Foundation areas should be prepared as specified in section 4.1 of titis repoct. The proposed home will be supported upon shallow, isolated or continuous spread footings. Continuous spread footings should be a minimum 18" in width. Interior bearing points and/or bearing pads should be a minimum 24" in width. The footings should be founded upon undisiurbed, gray brown to blue gray silt or sand of the Transitioual Bed (Qtb) formation. These soil are described on the Hand Auger Logs contained in Appe�utix E ofthis report. The minimum deptL to beariitig soil is four (4) feet below existing site grades based on tlie information collected during the site investigation. No footings should be founded in or above any topsoil, w�documented fill, or loose native, disturbed soil. The front face of any footing or beariug pad should be placed a minimum of tl�ree (3) feet back from any natural slope. il�e front uf footings or bearing points should be placed no closer than a 1:1 (H: [7 from the top face of a cut slope. All exterior footing elements should be placed a minimum 18" below adjacent exter'or grades for frost protection. A maximum allowable safe bearing pressure of 2500 pounds per square foot (ps� may be utilized for tLe design of shallow fowidation elements founded as outlined above. The allowable �p (>ES, Inc. � �