02-19-2002 Planning Packet - Laserfiche WebLink

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Proposed Subdivision Lot Area/Width Gross Area Kvisting Wetland Area Net Area Exclusive of Wetland* Lot Width (N-S) Lot 1 (Fire Station)2.04 ac.0.14 ac.1.90 ac.327 ’i Lot 2 (East Lot)3.42 ac.0J7 ac.3.05 ac.388* + Road Outlot 0.42 ac.0.07 ac.0J5 ac.60*+ Willow Drive R.O.W.0.29 ac.0.29 ac.33 ’ Total 6.17 ac.0.58 ac.5.59 ac. * Prior to wetland flllint;. miti{>alion and stormwater ponding ^2755 Long Lake Fire Slalion Site February 15.2002 Page 3 platted. The proximity of the north boundary of the property to the future new bndge over the railroad and new Highway 12, makes it necessary for this corridor to be along the south boundary of the site. Orono normally requires a 50’ public or private road corridor to scr\c the range and magnitude of potential uses expected on this site. At this time there is no plan to make a future through road connection to Long Lake, although the 50’ corridor would accommodate such a roadway. Because Orono has not determined a final use for the proposed easterly parcel, the road corridor is not being platted past the fire station lot. The proposed road corridor exceeds 50 feet in width to avoid impacting the drainageway along the south boundary of the site. It also curves northward at the rear of Lot 1 to minimi/.e the amount of wetland filling nccessar>’. Wetland Impacts. Delineation of wetlands on the site has resulted in a number of site layout impacts, and wetlands thcmse'ves will be impacted to some extent. First, the wetlands on the site are not shown on either the National Wetland Inventory or the City of Orono’s protected wetland maps. These newly defined w etiands arc linear in nature, wooded wetlands, following the drainageway or intcmiittent creek bed as it traverses from west to east near the southern border of the site. A finger of delineated wetland extends northwestward from the creek bed toward the fire station, and portions of this will have to be filled in order to accommodate the station, its access driveway, and the road leading to Lot 2. The wetland filling cannot be totally avoided; however, it has been minimized by expanding the road corridor and routing the road'driveway northward over a narrow point of the wetland finger. Nearly all the wetland filling will occur in Lot 1 . Mitigation of this filling is proposed to occur in Lot 2 on the south side of the creek at a 2:1 ratio as required by the Minnehaha Creek Watershed District. MCWD requires a 16' buffer be maintained around the existing wetlands and around the mitigation area. The mitigation boundary has been held back 16 from the south lot line so that use of the adjoining property is not affected by current MCW D buffer requirements. MCWD has a rule change process undervvay that would increase the wetland buffer requirements; however, those requirements arc not in effect at the time of this review and are not expected to impact this application. The MCWD will require that easements be created for protection of the existing and newly created w etlands as well as for the required buffer areas. Remember that the wetlands delineated on the site are not specifically protected by Orono’s current ordinances, but arc protected under tne Wetland Conscr\ation Act which MCWD administers on Orono s behalf. No variance for the wetland impacts is required under Orono’s current ordinances. H.vccrpts from the wetland mitigation and stormwater ponding plan for the fire station arc attached as Exhibits C & D. The sketch on the following page shows the relationships between the fire station layout, the existing wetlands and areas that need to be filled, proposed mitigation areas, proposed stormwater ponding, and utility corridors.