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� 31Ca5 C�sc� Ci►'�(� <br /> ° 2bi Z- 0031� <br /> �. � SCNIMNO WSKI ENG � NFf RS <br /> CRITERIUM-SCHIMNOWSKI ENGINEERS <br /> 161 DUNBAR WAY <br /> MAHTOMEDI,MN 55115 <br /> TEL 651779-7700 <br /> FAX 651 779-7114 <br /> www.criterium-schimnowski.com <br /> June 26,2013 <br /> Lincoln Danforth <br /> Yardscapes, Inc. <br /> 8609 Harriet Ave. So. <br /> Bloomington, MN 55420 <br /> RE: Boulder Retaining Wall Evaluation <br /> 3165 Casco Circle <br /> Orono,Minnesota <br /> Project No. 13-0948 <br /> Dear Mr. Danforth: <br /> This letter is being sent per your request regarding the recently constructed boulder retaining walls at <br /> 3165 Casco Circle in Orono,Minnesota. This evaluation is based on observations I made during a site <br /> visit on June 26, 2013, and verbal statements made to me by you regarding construction means and <br /> methods. <br /> The construction of the retaining walls appear 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 on the house in order to direct the roof runoff away <br /> from the retaining walls. Surface water should also be directed 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 /> �i� / <br /> ) _�Y�,� - <br /> Paul Schimnowski, PE <br /> � <br /> LICENSED <br /> PROFESSIONAL <br /> ENGINEERS <br /> HOME&BUILDING INSPECTIONS <br /> STRUCTURALEVALUATIONS <br /> ASSOCIATION RESERVE/TRANSITION STUDIES <br /> RESIDENTIAUCOMMERCIAL <br /> RETAINING WALL DESIGN& EVALUATIONS <br />