correspondence re pool/wetland buffer

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� , Memorandum � Bonestroo Date: 2335 Highway 36 W To: Evelyn Turner Project: 4680 Creekwood Trail 10/15/20 St.Paui,MN 55113 Q 7 Tel 651-636-4600 -- _ _ _- _ _ _- — — — — __ _ - — — Fax 651�36-1311 From: John Smyth, CWD Client: City or Orono www.bonestroo.com Re: Wetland Buffer Ortlinance Review Memo File No: 139-07000-1 Remarks: Per section 78-1601 of the Wetland Ordinance the proposed location and grading required for the pool will trigger wetland buffers and setback for the proposed project at 4680 Creekwood Trail. The property currently has one wetland that has a Manage 1 Classification. This classification requires a 35 foot vegetated buffer and 20 foot setback from the buffer. The proposed pool location is outside the required buffer and setback location antl meets the requirements of the ordinance. Buffer Condition and Requirements A site evaluation was completed on 8 October 2007 to determine the condition of the vegetation in the existing upland buffer. Currently a small portion of the buffer is turf grass and the remainder of the buffer has been left in a natural wootled condition. The wooded portion of the buffer currently contains buckthorn. According to Division 3 sec. 78-1605 turf grass and buckthorn are considered to be an undesirable plant species and should be removed from the buffer area. After the turf is removed it is required to be planted or seeded with native species. The applicant will need to provide a Management/Landscaping plan that includes the following: 1. Methotl proposed to be used to control buckthorn (MN DNR website source for options). All buckthorn removal should be done using hand tools as large equipment can further disrupt the wetland buffer. At a minimum buckthorn should be cut and the remaining stems should be treated with an approved herbicide following label instructions. Treating the cut stumps will help prevent regrowth of the buckthorn. 2. Method of establishing native vegetation in turf areas(MN BWSR Web Site— Publication: "Restoring & Managing Native Wetland and Upland Vegetation"source for options). 3. Species proposed to be seeded or planted. According to the ordinance Div. 3 Sec. 78- 1605 (3)the seed mix must contain at least 12 pounds(PLS) per acre of native prairie grass seed and 5 pounds(PLS) per acre of native wildflower seed. The grass mixture must contain a minimum of four species while the wildflower mixture must contain a minimum of five species. (MN BWSR Web Site—Publication: "Restoring &Managing Native Wetland and Upland Vegetation"source for options).