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2335 Highway 36 W <br /> St. Paul, MN 55113 <br /> Tel 651-636-4600 <br /> Fax 651-636-1311 <br /> www.bonestroo.com <br /> April 25, Zo�� � Bonestroo <br /> Melanie Curtis <br /> Planning and Zoning Coordinator <br /> City of Orono <br /> Post OfFice Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 2400 Fox Street <br /> File No. 000139-09000-2 <br /> File No. 2009-0803 <br /> Dear Melanie: <br /> We have reviewed the as-built plans for the new home construction at 2400 Fox Street. The <br /> plans are dated 11-12-10. We have the following comments with regards to engineering � <br /> matters: ���� ���� <br /> • At the direction of ciry staff, our 12-3-09 site plan review assumed that the proposed /�� <br /> retaining walls over four feet in height were to be cast in place concrete and integral to , �� <br /> the home's foundation. The retaining wall layout has changed significantly from the �� <br /> approved grading plan and the as-built drawing indicates that these can not be integral <br /> to the house foundation. Engineered design and details should be submitted for review <br /> and approval for all retaining walls over four feet in height, and for all tiered walls with a <br /> separation of less than two times the wall height. All retaining walls except the driveway <br /> wall and the one located at the southeast corner of the house appear to need an <br /> engineered design. Since these walls are already constructed, an engineer will need to <br /> certify that the walls were installed according to an acceptable engineered design. <br /> • The area draining to the low point adjacent to the southeast corner of the house is <br /> significantly larger than proposed. The installed drainage system should be evaluated by <br /> an engineer to show adequate drainage capaciry and home protection. <br /> If you have any questions, please call me at(651) 604-4894 or send an email to <br /> darren.amundsenCa�bonestroo.com. <br /> Yours very truly, <br /> (h—____;_._._� �-�'��-_ <br /> Darren Amundsen <br /> Cc: Tom Kellogg <br /> Chris Mattson <br />