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� . °� o <br /> � � � .��C�` I A►� N 0� 1�� � E-�V� � N�� E R S <br /> . , � <br /> CRITERIUM-SCHIMNOWSKI ENGINEERS <br /> 161 DUNBAR WAY <br /> MAHTOMEDI,MN 55115 <br /> TEL 651779-7700 <br /> FAX 651779-7114 <br /> www.criterium-schi m nowski.com <br /> September 19,2014 <br /> Aaron Madson <br /> Natural Creations Inc. <br /> 5700 Vagabond Lane North <br /> Plymouth,MN 55446 <br /> RE: Boulder Retaining Wall Evaluation <br /> 2325 Glendale Cove Lane <br /> Orono,Minnesota <br /> Project No. 14-1413 <br /> Dear Mr.Madson: <br /> This letter is being sent per your request for an evaluation of the boulder retaining wall construction at the <br /> 2325 Glendale Cove Lane project in Orono,Minnesota. This evaluation is based on verbal information <br /> and project photos provided on September 15,2014(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 /> Tfiis 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 /> U �� — <br /> � � _ <br /> Paul Schimnowski,PE <br /> LICENSED <br /> P ENGINEE S� RECEIVED <br /> H S'TRUCTURA NEVA UATIONS S �OV — 7 ZO�'t <br /> ASSOCIATION RESERVE/TRANSITION STUDIES <br /> R ES I DENTIAUCOMMERC IAL <br /> RETAINING WALL DESIGN&EVALUATIONS CITY OF ORONO <br />