5700 23RD DR W 2016-01-01 MF Import

a PAG6 2/3 , qpR-21-99 08.49 FROM•EVERETT PLANNINC DEPi ID•4262578742 . I GeoTest Sarviea,lae. Nonhd�mc CAurel+.5eaw�y.Lat 3,Evadt Wsshinaton April 14, t999 . wrapped around the face of the fill with a minimum of two feet of ovedsp back into thc fill. Grid IengUu should be at least 2 feet greatcr than the hei�ht of the rockery. ln other words, 10 fat for a 6 to 8 foot rockery, 8 fcet for a 4 w 6 foot rockery and 6 feet for a 4 foot rockery. St�uctunJ fill should be compacted to a minimum 95 perCent of maximum dry deasity as determined in accordance with ASTM D1557 (Modified Proctor). Suuctura! fill should be free of orgaaics and reasonably well �raded. !n general, fill should have less than 5 percent passing tl�e #200 sieve (silt and clay size particles); however, this is more criticai during periods of wct weather. A Geo7est Services rcpresentativ� should be requested to observe coaswction of the rockery in order to confitm condirions are as anticipated, geogrid placement and that the wall is being consuucted in accordance with the Associated Rockery Contcacw:s Guidelina. In our opinioa, meandering of the Fsst Fork of Powder MiU Crcek shoul��not have an impact on the base of the rockeries due w the horizontal distance between the creek bed , the shape of the drainage aad the slight elevation drop from the tce of the mckery to the creek. While the i rockeries will be placed across e�cisting drainaees, no impacts on the cra.lcc are anticipated based , on the lack of observed surface runoff on April 12, 1999. If you have any questions regarding the conteats of this letter or there is any point that is not '� clear, please fcel free to eontact our office at any tima We apprcciato the opportunity to work with you on this project. Respectfully Submitted, S. GeoTest Servica,Iac. O�G�wu�,_l�-�� 4 = � M � �mc� ,� ��y g9 . , Douglas S.Lynne.P.E. �2 /3/ a� Geotechnical Services Mana�er nu.enea: Fsgure 1:Typica�ttockery sect�on .,».,.._.....,.,,...�„ ..,...,,r.., P�e 2 of 2