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�Sain Officc <br />1?�I1 - l35:r A�c VF., A-SOrI <br />W'oodinvipc. VI'A 980%2 <br />(425)486-1G69• k�AX(425)481-2510 <br />June 30, 2014 <br />Mr. Robert and Heidi Packer <br />1209 Madrona Avenue <br />Everett, Washington 98203 <br />I�CELSON G�C)TECHI`,1ICAL <br />ASSOCIATES, INC. <br />GEOTEGHNICAL ENC�INEERS & GEOLOGISTS <br />Updated Geotechnical Plan Review Letter <br />Retaining Wall <br />Everett, VVashin�ton <br />NGA File No. 871 OE313 <br />t�nginccring-Gcology F3ranch <br />552G ]ndustry (.anc, ;:2 <br />F.ast ��'cnatchcc, 41� A 98802 <br />(5O9) 665-7G96 I�r1X (509) 665-7692 <br />Dear Mr. I'acker: <br />This letter presents the resuhs of our updated beotechnical engineeri��g review of the plans for the <br />retaining wall pianned on the slope dowilhill �[�rom your residence located at 1209 Madrona Aven�ie in <br />Everett, Washington. <br />INTRODUCTION <br />A steep i�orthwest-facing slope is located north of the existing cesidence. A series af retaini��g walls had <br />bee» co��st�ructed on tl�e prop�rt�y above a ravine and partially on the property to the west. A landslide <br />occurrecl on the slope below the walls in late November 2012. We ��ere retained to evaluate the steep <br />slope, landslide, and existing walls. We prepared a geotechnical report titled "Geotechnical EnQineering <br />Evaluation — Packer Propei-ty — Retaining Walls and Steep Evaluation — Everett, Wasl�ington," dated <br />Mar•ch 1 l, 2013. During that study, we recommended a retaining wall within the ravine in the area oftlie <br />landslide to stabilize the affected area. We have since prepared a plan review letter for the proposed <br />retai�ling wall dated Januaty 1 i, 2014. We now understand that the retaining wall has been changed from <br />a pin pile wall with pressure-treated lagging and tieback anchors to a concrete wall supported on pin piles <br />and g►�outed tiebacks. <br />