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Bonestroo 35 West Highway 36 ■ St. Paul, MN 55113 • Rosene Office: 651-636-4600 • Fax: 651-636-1311 ✓--- Anderlik& www.bonestroo.com Associates Engineers&Architects January 6,2006 • a 9 2006 Mr.Michael Gaffron CIT' Oj Planning Director T°No City of Orono Post Office Box 66 Crystal Bay,MN 55323 Re: 3165 North Shore Drive File No.000139-06000-0 Plat No.05-3135 Dear Mike: You and I met yesterday with the applicant's architect to review the revised plans for the proposed improvements to 3165 North Shore Drive.The site improvements include the construction of a new home and associated grading.The following is a summary of our comments from that meeting regarding Alternate Plan A: • The revised grading plan has improved the situation west of the home with the proposed swale containing drainage on the subject property. The drainage along the east side of the home will convey water across the neighboring property.Although a note on the plan indicates an easement will be necessary,the applicant may want to consider some type of a lot line rearrangement with the neighbor so that an easement is not necessary. • The grading plan should incorporate some type of a swale between the turnaround shown north of the home and the top of the garage so that drainage is not routed over the garage onto the driveway. • The proposed retaining wall along the driveway to the garage approaches 10-feet in height and will require a separate engineered design and detail submittal for review and approval. • The applicant's architect informed us that the fill necessary to complete the grading as shown will exceed 2000 cubic yards.It is worth considering moving the proposed home northerly and turning it slightly so that the front of the home is closer to parallel with the shoreline to minimize the fill necessary and to improve views to the lake. • The applicant should commission a geotechnical firm to verify existing soil conditions and certify that the existing foundation is adequate to support the proposed improvements.Soils in this area may be marginal and the applicant should at least determine whether or not pilings will be necessary. • Pre and post construction drainage calculations should be provided for the 2, 10,and 100-year storm events. Post construction discharges off site shall not exceed existing discharges. If you have any questions please call me at(651)604-4863. Yours very truly, BONESTROO,ROSENE,ANDERLIK&ASSOCIATES,INC. Tom Kellogg Cc: Greg Gappa,City of Orono St. Paul, St. Cloud, Rochester, MN • Milwaukee, WI ■ Chicago, IL Affirmative Action/Equal Opportunity Employer and Employee Owned