1209 MADRONA AVE 2016-11-17 - Laserfiche WebLink

Geotec'nnical �ngineering Evaluation Packer Property Retainir�g ��Jalls and Steep Slope Evaluation Everett, VJashington NGA File No. 8"]Ol 13 Maro1� 11, 2013 Page 14 {Symphoricarpos albus), Nootka rose (Rosa nutkana), Ocean Spray (I-�c�lodiscus discolor), and Oregon- grape (.Tvianhonia nervosa}. �T�'e should be retained to review and camment on the slope vegetatian plan. The homeawners should be able to come up with the re-rregetation plan, but NGA should be retained to review such plan prior to implementation. The actuaI need/extent of the erosion control matting shauld be evaluated by NGA after tlie ��all is iflstalled. �aili�ag VF'ail Repairs The sectioza of the eaisting wall that has failed but not related to t17e s1�pe failure should be repaired by placing the bloeks on a concrete leveling pad and backfiliing the wall v��ith clean crushed rock. Some of the slumpine sails in this area should be additionaily over-exca�-ated and replaced with the czushed rock backfill. These repairs should be completed prior tn insta�ling t31e reiaining u�all in ihe slide area. NGA should approve tne repairs dunng construction. tiSE OF'FI�IS �2EPOR'�' NGA 11as prepared this repart for Robert and Heidi Packer and their agents for use in the plai�ning and budgeting of the repairs on this site only. The scope of our work does not include services related to construction safety precautions and our recommendations are not intended to direci i:l�e contractors' methods, techniques, sequences, or procedures, except as specifically described in our report for consicieration in design. There are possrble variations in subsurface conditions between the explorations and also with time. Our report, concIusions, and interpretations should not be construed as a warranty of subsurface conditions. A contingency for unanticipated conditions should be included in the budget and schedule. All people ��ho outn or occupy homes an hillsides sho�ld realize ihat landslide movements are al��ays a possibilit}�. The landowner should periadicalIy inspect the slape, especially after a winter starm. If distress is evident, a geotecl�nical engineer should be contactea for advice on remediaUpreventative measures. The probability that landsliding �rill occur is substantially reduced bv the proper maii�tenance of ciraina�e cantrol measures at the site. Therefore, ihe homec�vsmer should take responsihility for performing such maintenance. Consequentl_y, u�e recommend t11at a copy of our report be pravided to any future homeawners of the property if the hame is sold. /NELSOiV GEOiECHNfCAL ASSOCI�T�S, fit�'C.