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2^^ U OS <br />Memo Bontstfoo <br />Itofenc <br />AndefMift <br />AsfodMS <br />InfMMrf 4 ArcMiccu <br />Pni9etMam9: MacKinnon Hill CHmrt: CKyofOrono <br />To; Mike Gaff^, Planning Oirodor <br />From: John Smyth. Senior Scientlet <br />FUoNo: 139-05-( <br />Oafe; 11/17/05 <br />Ro: Wetland Review <br />m <br />Romorko: <br />8lta Simunary <br />The development was reviewed for wetland impacts. Currently a wetland is located within the southern portion <br />of the site. A small creek flows into the wetiands under Watertown Road via a culvert. The creek flows through <br />the northwest side of the wetland. There is a drainage easement shown on the plan however the easement <br />location on the southern portion of the property does not reflect the location of the creek and in one location is <br />shown on a slope. I would recommend that the centerline of the creek be surveyed and the drainage easement <br />be modified to more accurately reflect the drainage through the site and also assist in the pond location as <br />discussed in the paragraph below. <br />Proposed Wetland impaeto and Ponding <br />The impacts to the wetland are from a proposed treatment pond. It is my understanding the goal of locating this <br />pond within the wetland was to preserve the wooded area within the site. I have reviewed the pond location <br />with our Water Resource Engineer and here are some items to be considered to further preserve trees on this <br />site. <br />1) <br />2) <br />Shift pond slightly to southwest to further avoid trees and potentially the creek. <br />Currently a pipe from catch basin 2 and 3 cut across the wooded area to a manhole and then the treatment <br />pond, ft is reoommerKled that these catch basins be routed along the proposed road to catcli basin 7 so <br />only one pipe crosses the wooded area. Realignment of a pipe from catch basin 7 to the pond could also <br />reduce impacts to the wooded area and could be aligned to discharge at the upstream portion of the pond <br />to provide better treatment. <br />Consideration will need to be made in the pond design and location to insure that the creek does not flow <br />into the pond and reduce its treatment efficiency by flushing it with clean water. <br />oasiiiiiiiiioeicK <br />nil WHH—rTT ISIIWMMtiuonRoad <br />Maquon.WIS30n <br />■L mT iii III iwn mmrn: <br />F m 3H4I1.4I01 <br />o <br />HIT* <br />OdCK <br />N6 <br />FMw: N7.M-21M Fax tof-m-im <br />MNsaaoi <br />FdORK MMM.NS7 <br />Fac SI0.I1444M <br />372129*8lrMt8 <br />8t Cloud. MN 86301 <br />PIMW; 3M.aSt.4863 <br />Fax; 330-261.6252 <br />GiayoW«.IL600M <br />Ftana: 647-8464774 <br />rwL 647-5466076