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. - � �. <br /> � �� �` '�; <br /> . , , _ <br /> Memorandum �Bonestroo <br /> To: Kellie Schlegel Project: 2870 Little Orchard Way Date: 10/18/2007 2335 Highway 36 W <br /> , St.Paul,MN 55113 <br /> From: Matt Jensen Client: City of Orono Tel 651-636-4600 <br /> Fax 651-636-1311 <br /> Re: Permit A 11482& 11483 Retaining Wall Review File No: 000139-07000-1 www.bonestroo.com <br /> Remarks: <br /> At your request, we have conducted a review of the retaining walls at the above referenced <br /> project for compliance with the requirements and standards of the City of Orono. The submittal <br /> information is as follows: <br /> Owner: Kevin & Paige Amster <br /> Wall Design Engineer: KBH Consulting, Inc. <br /> Certificate of Survey: Precision Surveys, Inc. certified October 9, 2007 <br /> Retaining Wall Submittal: KBH Letter dated October 9, �007 w/wall specification and section <br /> Date Received; October 16, 2007 <br /> These are privately owned retaining walls that will be installed arountl the proposed pool on <br /> the property. We have reviewed design submittal for conformance with the International <br /> Building Code. <br /> The KBH wall submittal does not provide the factors of safety for the wall design. The design <br /> engineer should submit the factors of safety for overturning, sliding, and soil bearing capacity <br /> to the City of Orono. <br /> No geotechnical information was provided for our review. We highly recommend that the soils <br /> used to construct the retaining wall are verified by a qualified geotechnical engineer for the soil <br /> properties that are used in the wall design. The wall design engineer also requires a <br /> geotechnical engineer to verify on-site soils, <br /> Summary of Comments: <br /> • The wall designer should submit the design factors of safety to the City. <br /> • Owner should hire geotechnical engineer to verify soil properties and backfill according to <br /> retaining wall plans. <br />