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2335 Highway 36 W St.Paul,MN 55113 Te1651-636-4600 Fax 651-636-1311 • www.bonesVoo.com January 17, 2008 �'Bonestroo Ms. Melanie Curtis Planning and Zoning Coordinator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re: 2118 Shadywood Road 1� File No. 000139-08000-2 Building Permit No, A-11789 Dear Melanie: We have reviewed the building permit survey and house plans for 2118 Shadywood Road received 1-�0-08, The plans propose to construct a new house and driveway. We have the following comments with regards to engineering matters: • The grading plan proposes to grade a swale on the property to the south within a temporary easement. Proof of this easement from the adjacent property-owner should be provided to the City. • It does not appear that the proposed grading to the north of the driveway will route runoff to the culvert. The culvert may need to be lowered to adequately capture runoff. However, this may not allow for enough grade downstream of the culvert for adequate drainage, Therefore, the applicant may want to consider installing an infiltration trench to the south of the driveway as proposed in a previous submittal. In either case, an EOF should be provided that is at least one foot lower than the lowest adjacent house opening. • Top of wall elevations should be provided for the retaining wall in the rear of the house. • Engineered design and details shouid be submitted for review and approval for all retaining walls over 4' in height. • A small amount of grading is proposed in the 0-75' setback to account for the higher house elevation, This would add approximately 5 cubic yards of material and appears to be acceptable. • It appears a 945 contour is missing from the east side of the house. If you have any questions, please call me at(651)604-4894. Yours very truly, Bonestroo � � . Darren Amundsen