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• • <br /> NELSON GEOTECHNICAL 1 <br /> N GA ASSOCIATES, INC. <br /> GEOTECHNICAL ENGINEERS & GEOLOGISTS <br /> Main Office Engineering-Geology Branch <br /> 17311—135th Ave NE,A-500 5526 Industry Lane,#2 <br /> Woodinville,WA 98072 East Wenatchee,WA 98802 <br /> (425)486-1669•FAX(425)481-2510 (509)665-7696•FAX(509)665-7692 <br /> MEMORANDUM <br /> DATE: October 10,2018 <br /> TO: Ms. Rosa Connell � w oov wAl ty <br /> aG'�'• <br /> -•f3� a r <br /> CC: Dennis Titus, CG Engineering r! low ;": <br /> w 35215 /iv <br /> FROM: Khaled M. Shawish,PE <br /> Lee S. Bellah,LG /ONAL <br /> RE: Connell Retaining Wall Plan Review and Comment Response Memorandum <br /> 1907 West Mukilteo Boulevard <br /> Everett,Washington <br /> NGA File No. 9452E 18 <br /> INTRODUCTION <br /> This memo presents our responses to review comments raised by the City of Everett Public Works <br /> regarding the Connell Residence Retaining Wall project located at 1907 West Mukilteo Boulevard in <br /> Everett,Washington. <br /> We previously prepared a geotechnical engineering evaluation for the project site for the previous owner <br /> titled "Pearson Residence Retaining Wall," dated February 19, 2016. We understand that concerns have <br /> been raised by the City of Everett Public regarding geotechnical aspects of the proposed retaining wall <br /> and construction. Their comments were presented in a comment letter dated September 17, 2018, <br /> prepared by Thad Newport. For our use in preparing this memo, we were provided with structural plan <br /> sheets titled "Connell Residence Slope Stabilization," dated August 9, 2018, prepared by CG <br /> Engineering. We have been requested to review the plans and provide our response to the City's <br /> comment. In the following sections, we have provided our plan review comments and responses to the <br /> City's comments of the proposed retaining wall. <br /> PLAN REVIEW <br /> We have reviewed the geotechnical aspects of the provided retaining wall plans and found the plans to be <br /> in general compliance with our recommendations as presented in our previous geotechnical report. <br /> Project plans indicate that the shoring wall will be constructed utilizing W8x31 soldier piles spanned <br /> with 4-inch by 12-inch timber lagging. The exposed height of the shoring wall will be a maximum of 6- <br />