02-23-2004 Council Packet - Laserfiche WebLink

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non*invajive veg^udon in pennanent upland buffet suttounding die new and existing wedand. The proposed new wetland ateas will be created by excavating down feom the existing contours adjacent to the wetland as shown on the Grading Plan. The new wetland areas are projected to become semipermanently-flooded and seasonally-flooded wetland (PUBF/PEMIQ fringes of the existing wetland basin, with Ae berm e.xpected to become saturated forested (PFOIB) wedand. A combination of native, non-invasive seed mix and seedlings/plugs will be established along the edges of the new wetland areas. Native, non- invasive tree species such as American tamaracl^ northern white cedar, black ash, green ash, or silver maple will be planted on the proposed berm, depending upon availability. The proposed upland buffer areas will be a minimum of 16.5 feet wide along the southern and eastern sides of the wedand, and a minimum of 25 feet wide along the northern edge of the wedand. A native, non-invasive plant community will be established in the proposed upland buffer ateas using a mix similar to diat included in Attachment A. The upland buffer area along the northern edge of the wetland will be maintained in the existing v'oody vegetation, with the exception of invasive species such as common buckthorn, whidi will be removed. In summary, the proposed project will partially restore an excavated wetland basin by constructing an earthen berm, which will be used to establish emergent herbaceous and woody vegetation. In addition, 2,135 sf of new wedand and 11,787 sf of upland buffer will be created adjacent to the wetland to mitigate the placement of fill for the construction of the berm. a mW;-'' f •: .■•.■ ii • a, #29