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' 2335 Highway 36 W , � St. Pdul, MN 55113 Tel 651-636-4600 Fax 651-636-1311 www.bonestroo.com February 24, 2011 �' Bonestroo Melanie Curtis Planning and Zoning Coordinator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re; 3300 Fox Street File No. 000139-11000-2 File No. 2011-00105 Dear Melanie: We have reviewed the plans for a proposed guest house at 3300 Fox Street. The survey is dated 12-2-10 and the site plan is dated 2-10-11. We have the following comments with regards to engineering matters: • There is a Preserve wetland on the property that will receive drainage from the guest house. Wetland buffers are required by city ordinance for this project. Section 78-1601 states that a wetland buffer will need to be established if all of the following three conditions exist: o The portion of the property disturbed by construction or land alteration activity drains to the wetland; and o The amount of grading exceeds 50 cubic yards or the construction activity involves the disturbance of more than 5,000 square feet of area; and o The redevelopment activiry results in a net increase in the square footage of impervious surfaces that drain to the wetland, or results in the relocation of impervious surfaces closer to the wetland, or results in changes to drainage patterns (slopes, meander patterns, etc) that the city engineer determines will increase the velocity or rate of runoff to the wetland. The current plans show that all three of the above conditions are proposed. • The site plan and survey pian are slightly different and should be coordinated to show the intended work on site. • This project will disturb more than 100 CY of material. Sediment and erosion control information meeting the requirements of Orono's City Code 79-7(c)(2) must be submitted. The minimum $2000 sediment and erosion control financial security should be required of the owner for this permit.