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SCHIMNOWSKI ENGINEERS <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 6, 2016 <br /> Lincoln Danforth <br /> Yardscapes, Inc. <br /> 8609 Harriet Avenue South <br /> Bloomington, MN 55420 <br /> RE: Boulder Retaining Wall Evaluation <br /> 3928 Cherry Avenue <br /> Orono, Minnesota <br /> Project#16-2203 <br /> Dear Mr. Danforth: <br /> This letter is being sent per your request regarding the recently constructed stone retaining walls at the <br /> above address. This evaluation is based on a wall layout plan prepared by you dated May 18, 2015, <br /> construction photos you provided on May 5, 2016, and verbal information regarding construction means <br /> and methods. <br /> The construction of the retaining walls is structurally stable and in general conformance with stone <br /> retaining wall and construction industry standards. The walls were constructed with stone of sufficient size <br /> and setback. Other typical construction details such as use of drainage elements and filter fabric also <br /> appeared to be followed correctly. As is normal for stone retaining walls of this type, some wall movement <br /> and soil settlement should be expected. I recommend that concentrated areas of surface water should <br /> also be directed away from the walls. Several photos were provided for documentation, some of which <br /> have been provided as part of this report. <br /> From my observations of the information provided by you, the 2-tiered granite rectangular boulder <br /> retaining walls are located along near the corner of the house and each have a maximum exposed height <br /> of 5 feet. A minimum embedment depth of 6" is to be maintained for the walls. The grades at the top and <br /> bottom of the walls are generally level. No other surcharge or groundwater loads have been designed for <br /> 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. 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, �LZ�lltItI i l;tl,l� <br /> - 'y SE _ <br /> Paul Schimnowski, PE —� � AL ; fr <br /> 481?d <br /> LICENSED .•.,. .0s. <br /> OF <br /> PROFESSIONAL '/!/f l i 1�lfd <br /> ENGINEERS <br /> HOME&BUILDING INSPECTIONS <br /> STRUCTURAL EVALUATIONS <br /> ASSOCIATION RESERVE/TRANSITION STUDIES <br /> RESIDENTIAL/COMMERCIAL <br /> RETAINING WALL DESIGN&EVALUATIONS <br />