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<br />Main Oftice
<br />77311 — 135'� Avenue ME, R-500
<br />Waodinville, WA 98Q72
<br />(425) 486-1669 FAX (425) A81-2510
<br />(425j 337-1668 Sr,ohomish County
<br />DA I'E
<br />`I'C}:
<br />FROM
<br />I'ebruary 14, 2O13
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<br />Mol:��nsmed Alhussaini
<br />Khaled Sha�vish, P�
<br />Lee S. Be;llah, LG
<br />Engineering-Geology 8rarch
<br />437 East Penny Road
<br />Wenatchee, WA 988d1
<br />(5U9) 665-7696 FAX {509) 665-7692
<br />�I�.��Rf�� ��,��
<br />RE: Alllussaini Property - Lipc3ated Recornmendatio��s
<br />Ultra Black ReinCarced Sc�il Wall
<br />E1�ei•eit, Washin�ton
<br />NG�-� File lLc�. g�76t?
<br />I raLroductic�n
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<br />Tl�is memc� su��arnarices aur updatee� ciesi�n �and ec�nstructic�n recc.,inmcndations fc�r the retaining wall
<br />plamied to stGpport fill within the wwestern portion of th� property located at l 2�8-5�`i' Stre�t SW in Evcrett,
<br />Washin�t�i�. `We understand tl�at you kziow plan t� use �n i.7ltra �31ock reinforeed soil wall �nsfi.ead af a
<br />K�:y�stonr F31ock watl that wa� previously recommended in o�ir letter titled "fllhussaia�i Slope TZepairs and
<br />Block Retail�ing Walls," dated December l l, 2012. We also �lriderst�and t}�at the proposed �U1tra F31ock
<br />Wall ti��ill be up lo a total 12.5 feet high (five ro�vs of blocks) including embedment. This menzo is
<br />suppleme.ntai to the previous letter and should be usecI in conjunction �vith fihat letter. We have b�en
<br />rc;quested by y�u to provide a desi�n for a reinforced soil wall with a t;ltra Block facing to suppo�-t tl�e fill
<br />ta be placeci on the slope. For our use iri preparing this merno, w� �,z-�re pr�vided with a site plan titled
<br /><`I3lt�c� Retainiz�g Vv'alls and Drainir��," dated Fel�rijar�1 5, 2013, preparecl by yc�u.
<br />�t%ali I?esign and Caa�stri�ctioa�
<br />It is our apinion that the planneci Ultra Block geogri�i reinforceci s�il wall with the Iar�e block facin�
<br />shoi�lcl provide adec�u�te suppc�rt far the praposed tills. An Ultra Bloek is a solid eonerete bloek measuring
<br />2.5 i'eet witie by 2.5 fee:t tall by 5 feet lon�, �vith r�n int�z-lt��;kiz�g design l�etu�een the stacked blocks. The
<br />blocks are atso available in half' height and half lcn�th sizes. The compet.ent native soil interpreted to
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