02-12-1996 Council Packet - Laserfiche WebLink

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Zoning File #2102 Januar>' 10,1996 Page 2 1-2 - Map 1-3 - Wetland Determination Information J - Topographic Map 2' Contours K - Designated Wetland Map L - Orono Orchard Highlands Plat M - Silt Fence Specs N - Seeding Information 0 - Excerpt "Principles of Landscaping for Wildlife" P - DNR/Wetland Map Q - National Wetland Inventor)’ Map R - U.S. Soils Map/Soils Legend S - Septic Map T - DNR-Model for Good Basin Design U - Gustafson Report V - C. Paul Pesck Letter of 1/16/96 W - 1Z26/96 Letter of Corps of Engineers X - Profile of Proposed Land Alteration Description of Request Tlie Orono Orchards Highland plat was approved by the City in December ol 1975. Review Exhibits J, K and L, final plat shows a slight cncroaclimcnt of a designated wetland at the southeast comer of the property. Staff has no record of a flowage and conser\ ation easement being taken over the designated wetland. In reviewing the topographic map and wetlands map. it would appear that the original wetland was designated at the 958 elevation. Refer to Exhibit G, the new wetlands delineation information notes the existence of a Type 3 wetland to the west ot the original 9^8 elevation. In the 1975 plat, the wetland was not defined in angles ;md bearings. Statf would suggest that the new wetland be redefined along the edge of the Type 3 wetland. Refer to Exhibits 1-1, 2 and 3 for the location of the newly defined Type 1 and 3 wetland areas. To be consistent with the City s policy, the Type 1 wetland may be protected with a pri\ ate covenant. The City would ask for a conservation and tlowage easement over the redefined designated wetland (area at or below 958 elevation and Type 3 wetland to west of 958 elevation). fhe wetland is contiguous with a 30 acre wetland system to the east and south. Applicant has provided photos of the wetland area confimiing the predominant growth of Purple Loosestrife in the main areas of the wetland. The wetland area to be altered is in a transitional area. Refer to present situation in Exhibit C. vegetation consists of 40Vo Purple Loosestrife. 40% lake sedge and 20% cattail. Refer to Exhibit D. in Jolin Anderson's comments he notes "Purple Loosestrife is a dominant species in the interior of the wetland. Reed Canar)' Grass is common along the margins of the wetland." Purple Loosestrife is an invasive aquatic weed that chokes out desirable native vegetation. It would be the same for the Canary Reed Grass that destroys the natural and native vegetation associated with a healthy, thriving wetland.