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. <br /> ' � o <br /> �,� SCHIMNO WSK1 FNGI NEf RS <br /> CRITERIUM-SCHIMNOWSKI ENGINEERS <br /> 161 DUNBAR WAY <br /> MAHTOMEDI, MN 55115 <br /> TEL 651 779-7700 <br /> FAX 651 779-7114 <br /> www.criterium-schimnowski.com <br /> June 15, 2015 <br /> Mike Kuka <br /> L&K Landscaping <br /> 3333 Iffert Avenue Northeast <br /> St Michael, MN 55376 <br /> RE: Boulder Retaining Wall Evaluation <br /> 3825 North Shore Drive <br /> Orono, Minnesota <br /> Project No. 15-1721 <br /> Dear Mr. Kuka: <br /> This letter is being sent per your request regarding the recently constructed boulder retaining walis the <br /> 3825 North Shore Drive in Orono, Minnesota. This evaluation is based on the site visit I performed on <br /> June 15, 2015, and verbal statements made to me by you regarding construction means and methods. <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 stone 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. I recommend that gutters and downspouts be <br /> installed and maintained on the house in order to direct the roof runoff away from the retaining wall. <br /> Concentrated areas of surtace water should also be directed away from the walls. Numerous photos were <br /> taken for documentation, some of which have been provided as part of this report. <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. Direct all surface <br /> drainage away from the retaining walls. If soil conditions, proposed layouts, or other design parameters <br /> vary from that assumed, a revised analysis might be needed. Please call me if you have any questions or <br /> need more information. Thank you. <br /> Sincerely, <br /> � <br /> 1 � _ <br /> Paul Schimnowski, PE <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 /> 3g�5 No��''��- �✓ <br /> 2014-Ob4c�3 <br />