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2335 Highway 36 W <br /> St.Paul,MN 55113 <br /> Te1651-636-4600 <br /> Fax 651-636-1311 <br /> www.bonestroo.com <br /> September 16, 2010 � 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: 3235 Graham Hill Road <br /> File No. 000139-10000-2 <br /> Building Permit No. 2009-0332 <br /> Dear Melanie: <br /> We have reviewed the as-built grading plan for 3235 Graham Hill Road dated 8-16-10. <br /> We have the following comments with regards to engineering matters: <br /> • There were significant changes to the approved driveway design that result in a <br /> greater hard cover area than proposed. If hardcover limits are an issue with this <br /> properry, we recommend the applicant submit updated hardcover calculations. <br /> • An unplanned retaining wall was constructed on the south side of the house. <br /> This wall has sections greater than four feet in height and to our knowledge, <br /> engineered wall plans have not been provided to the city. We recommend that <br /> the city require the submittal of wall design caiculations and as-built drawings <br /> certified by engineer. <br /> • The overall as-built grading plan is generally consistent with the proposed <br /> grading plan and is acceptable from an engineering standpoint. <br /> If you have any questions, please call me at (651) 604-4894. <br /> Yours very truly, <br /> �1�—����'.��__- <br /> Darren Amundsen <br /> Cc: Tom Kellogg <br /> Chris Mattson <br />