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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 /> September 5, 2007 �� Bonestroo <br /> Ms. Evelyn Turner <br /> Planner <br /> City of Orono <br /> Post Office Box 66 `����1'���� <br /> Crystal Bay, MN 55323 S� <br /> EP - ? Z007 <br /> Re: File No.�000 39n07000-1 �'�Y�� �R�nf� <br /> Plat No. A-11305 <br /> Dear Evelyn: <br /> We have reviewed the plans for 1595 Bohns Point Road, dated 8-28-07. We have the following comments with <br /> regards to engineering matters: <br /> • It appears an existing 944 contour line is missing along the north lot line. The plans show two <br /> proposed 944 contour lines tying into the same existing 944 contour. The grading should be revised in <br /> this area to resolve this issue. <br /> • A swale should be graded along the western half of the north lot line to contain all drainage on the <br /> subject property. <br /> • A portion of the driveway is shown to have a slope of approximately 4:1. The driveway grades should <br /> be revised such that they do not exceed 10%. <br /> • The proposed slopes exceed the maximum allowable slope of 3:1 to the south and west of the proposed <br /> terrace. The grading should be revised in this area such that slopes do not exceed 3:1. <br /> • It appears that the grading along the south side of the terrace will route water towards the house. The <br /> grading should be revised in this area such that drainage is routed away from the house. <br /> • The proposed driveway grades near the proposed garages appear to be relatively flat. More detailed <br /> information, such as spot elevations, should be provided in this area to indicate that there will be <br /> adequate drainage away from the house and garage. <br /> • Engineered design and details should be submitted for all retaining walls over 4' in height. <br /> • The proposed retaining wall elevations for both walls do not match the proposed contours. The plans <br /> should be revised such that the wall elevations are in agreement with the adjacent grading. <br /> If you have any questions, please call me at(651)604-4863. <br /> Yours very truly, <br /> BONESTR00 <br /> ✓ <br /> ,/o�r'z <br /> St.Paul <br /> Tom Kellogg sc.aoUd <br /> Rochester <br /> Milwaukee <br /> Chicago <br /> � <br /> . <br />