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d <br /> SCHIMNOWSK1 ENGINEERS <br /> CRITERIUM-SCHIMNOWSKI ENGINEERS <br /> 161 DUNBAR WAY <br /> MAHTOMEDI,MN 55115 <br /> TEL 651779-7700 <br /> FAX 651779-7114 <br /> www.criterium-schimnowski.com <br /> October 14, 2015 <br /> (Revised October 28, 2015) <br /> John Leupke <br /> 2595 Lydiard Circle <br /> Orono, MN 55331 <br /> RE: Boulder Retaining Wall Evaluation <br /> 2595 Lydiard Circle <br /> Orono, MN <br /> Project No. 15-1811 <br /> Dear Mr. Leupke: <br /> This letter is being sent per your request regarding the recently constructed boulder retaining walls at the <br /> above address. This evaluation is based on the site visit I performed on October 13, 2015. <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 concentrated areas of surface <br /> water should also be directed away from the walls. Numerous photos were taken for documentation, <br /> some of which have been provided as part of this report. <br /> Additionally, the soil conditions at the site met my initial soil bearing capacity requirement of 2000 pounds <br /> per square foot (psf). <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 /> Paul Schimnowski, PE <br /> LICENSED <br /> PROFESSIONAL <br /> ENGINEERS <br /> HOME&BUILDING INSPECTIONS <br /> STRUCTURAL EVALUATIONS /' <br /> ASSOCIATION RESERVE/TRANSITION STUDIES Z5 q5 L1drarD� C/a/4- <br /> .. <br /> RESIDENTIAL/COMMERCIAL <br /> RETAINING WALL DESIGN&EVALUATIONS 2.015 — 01242 <br /> gelemi l Wall 1- Crivrway ryl ufitorvf— <br />