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. . � <br /> � SCNIMN � WSK1 f NGI Nf ERS <br /> CRITERIUM-SCHIMNOWSKI ENGINEERS <br /> 161 DUNBAR WAY <br /> MAHTOMEDI,MN 55115 <br /> TEL 651779-7700 <br /> FAX 651 779-7114 <br /> www.criteriu m-schimnowski.com <br /> August 21, 2014 <br /> Mike Kuka <br /> L&K Landscaping <br /> 3333 Iffert Avenue Northeast <br /> St Michael,MN 55376 <br /> RE: Boulder Retaining Wall Evaluation <br /> 3925 Cherry Avenue <br /> Orono,Minnesota <br /> Project No. 14-1382 <br /> Dear Mr. Kuka: <br /> This letter is being sent per your request for an evaluation of the boulder retaining wall construction at the <br /> 3925 Cherry Avenue project in Orono,Minnesota. This evaluation is based on site observation I made <br /> during a site visit performed on August 18,2014(see attached photos). <br /> The construction of the retaining walls appears to be structurally stable and in general conformance with <br /> boulder retaining wall and construction industry standards. The walls were constructed with boulders of <br /> sufficient size and setback. Other typical construction details such as use of drainage elements and filter <br /> fabric also appeared to be followed correctly. As is normal for boulder retaining walls of this type, some <br /> wall movement and soil settlement should be expected. <br /> I recommend that gutters and downspouts be installed and maintained on the house in order to direct the <br /> roof runoff away from the retaining wall. Concentrated areas of surface water should also be directed <br /> away from the walls. <br /> This evaluation was performed using the design guidelines presented in the third edition of the"Design <br /> Manual for Segmental Retaining Walls" (DMSRW)published by NCMA in 2009. If soil conditions, <br /> proposed layouts,or other design parameters vary from that assumed a revised analysis might be needed. <br /> Please call me if you have any questions or need more information. Thank you. <br /> Sincerely, <br /> -- ��`���r_'-w„ ..,.,..�' - •:� <br /> 7- - -�: <br /> � <br /> Paul Schimnowski, PE <br /> LICENSED <br /> PROFESSIONAI <br /> ENGINEERS <br /> HOME 8 BUILDING INSPECTIONS <br /> STRUCTURAL EVALUATIONS <br /> ASSOCIATION RESERVElTRANSITION STUDIES j <br /> RESIDENTIAUCOMMERCIAL � <br /> RETAINING WALL DESIGN&EVALUATIONS <br />