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Memo Stantec Bonestroo To: Melanie Curtis From: John Smyth File: 139-11000 Date: November 14, 2011 Reference: Wetland Code Review —85 Old Crystal Bay Road We have reviewed the City of Orono Wetland Code Requirements for the proposed driveway. The proposed driveway triggers the wetland buffer requirements of the City Wetland Code. The wetland located adjacent to the area of disturbance is classified as a Manage 2 wetland and will require a 25 foot buffer to protect the wetland. A wetland buffer is required for the portion of the wetland adjacent to the proposed driveway disturbance (see attachment). It appears that as part of a Minnehaha Creek Watershed District approval of the house construction, buffers were required around all of the wetlands. The landowner is responsible to deal directly with the watershed to ensure they are in compliance with their previous approval. Buffer Vegetation Requirements Most of the buffer is in a natural state (not mowed or turf) and the ordinance only requires that it is preserved. It appears that a small portion of the buffer may contain turf. The portion of the buffer that is turf will need to have the turf removed and be restored to native vegetation. A written description of the proposed native seed mix to be seeded and method of site preparation and seeding should be provided to the City for review and approval. 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. Wetland Buffer Markers At the time of construction staking for the grading of the proposed driveway the upslope edge of the wetland buffer shown on the attached exhibit should be staked so it is clear to the City and landowner where the buffer is located. One Team.lnfinite Solutions. jrs k:\139\139110000\communicationslwetland ordinance compliance185 old crystal bay road'nelanie_s^85 old crystal bay road memo.docx •