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• � `'� BO�TON 8�. 1\/I �N K , I NC�a� ,, • `i Consulting Engineers & Surveyors `� � � 2638 Shadow Lane, Suife 200•Chaska, MN 55318-1172 Phone (952)448-8838• Fax (952)448-8805 www.bolton-menk.com August 30, 2012 City of Orono Attn: Christine Mattson PO Box 66 Orono, Mn 55323 RE: Wetland Delineation/Bldg. Permit#2012-00728 2280 Fox Street Dear Christine: As requested, we have reviewed the wetland boundary and buffer area at 2280 Fox Street. We offer the following observations, comments and recommendations for your consideration. 1. I reviewed the wetland boundary in the field on August 22, 2012 and agree with most of the wetland boundary as marked. One of the flags near the east end of the boundary line appeared to be off by just a few feet. However,this will not impact the wetland buffer zone in relation to the project. Refer to the attached GIS map showing my determination of the wetland edge. 2. An "as-built" survey of the project, indicating the wetland edge and the buffer edge, will suffice for City records. 3. This wetland is listed as a"preserve" wetland in the MCWD inventory,which requires a 50 foot buffer per City code. The buffer was not marked in the field, so I examined the entire area between the wetland edge and the existing fence(about 100 feet apart). A good stand of native vegetation dominated by Green Ash, Sumac, Canada Golden Rod and Raspberry exists in this area. I also observed a very small percentage of Canada thistle, which will need to be controlled. 4. The proposed addition has the potential to adversely impact the wetland which will trigger the wetland protection ordinance requirements. Therefore,the following should be considered: a. The wetland will require a 50 foot buffer. b. Canada thistle was found in the wetland buffer area and is considered to be an undesirable plant species. A plan including methods for removal and control of the Canada thistle should be submitted for review. c. Wetland Buffer markers should be placed at the upland boundary of the buffer edge located at lot lines and changes of buffer edge direction and spaced a maximum 200 feet apart. d. A $1,000 escrow should be submitted by the Owner to cover the cost of buffer development if not completed by the applicant. Please contact me if you have any questions or need additional information. Sincerely, BOLTON& MENK, INC. Mark L. Perry, WDC Natural Resources Specialist Cc: David Martini, Bolton & Menk Robert Bean, Bolton& Menk