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� B011eSt1'00 2335 West Highway 36 ■ St. Paul, MN 551 1 3 <br /> 0 Rosene Office: 651-636-4600 ■ Fax: 651-636-131 1 <br /> � Anderlik& www.bonestroo.com <br /> Associates <br /> Engineers&Architects <br /> January 31, 2007 <br /> Ms. Evelyn Turner <br /> Planner <br /> City of Orono <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 2590 Casco Point <br /> File No. 000139-07000-1 <br /> Plat No. 07-A10663 <br /> Dear Evelyn: <br /> We have reviewed the revised grading plan for the proposed house at 2590 Casco Point, dated 1-29-07. We have <br /> the following comments with regards to engineering matters: <br /> • It appears that the proposed retaining walls near the east end of the driveway are approximately 4.5' in <br /> height. Engineered design and details should be submitted for review and approval for all retaining walls <br /> over 4' in height, and for all tiered walls with a separation of less than 2 times the wall height. <br /> • The plan shows 2 proposed 962 contour lines converging near the north corner of the house. These 962 <br /> contour lines do not agree with the other proposed contours, or the adjacent spot elevations around the <br /> home. The grading plan should be revised such that no contour lines converge and all inconsistencies <br /> between the contours and spot elevations are eliminated. This may require extending the proposed <br /> retaining wall to the northeast. <br /> • The driveway approaches Casco Point Road at a proposed slope of 10%. The proposed slope at the base <br /> of the driveway should be minimized to the extent possible, for a distance of at least 25'. This may <br /> require adjusting the proposed grades near the top of the driveway. <br /> If you have any questions, please call me at(651) 604-4894. <br /> Yours very truly, <br /> BONESTROO, ROSENE,ANDERLIK& ASSOCIATES, INC. <br /> � i <br /> Darren Amundsen <br /> Cc: Tom Kellogg <br /> Bonestroo recently merged w"�th DSU,bringing together some of the best regional talents in engineering, architecture,planning,landscape architecture, <br /> and urban design. Our combined team now provides integrated services in one organization. <br /> ■ St. Paul, St. Cloud, Rochester, MN ■ Milwaukee, WI ■ Chicago, IL <br /> Afflrmative Actfon/Equal Opportunity Employer and Employee Owned <br />