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H KJOLHAUG EN\aRONMENTAL SERVICES COMPAKV^ Providit)£ Sciund, Bolanctd. Comprthimtve UoturatBaourci Solutions MEMORANDUM DATE: November 6,2002 TO:Mr. Mike Wyatt, Minnehaha Creek Watershed District Tom CuUum Rachel Igel, The Wetlands Company Marty Campion, O^o Associates FROM: Mike DeRuyter, Kjolhaug Environmental Services Company RE: No*Lo88 Determination and Wetland Reatoration- Cullum Site The purpose of this memorandum is to describe proposed modifications to a wetland located on the Tom Cullum property located at 785 Femdale Road, in the N '/a of the NE */4 of Section 36, Township 118 North, Range 23 West, Orono, Minnesota (Figure 1). The site is specifically identified as Tract B, Registered Land Survey No. 1031, Hennepm County, Minnesota. As described in the attached Wetland Delineation Report, the wctlaiad consists of a Type 5 (PUBGx) pond in the western half of the property, surrounded by mowed Kentucky bluegrass lawn in all directions except to the north and southwest, which is dominated by common buckthorn and green ash trees. Based on a review of aerial photographs, the wetland appears to have been excavated between 1953 and 1964 (Figure 2), an assessment that was supported by observations of the wetland during the Decernber 14,2001 and June 6,2002 site visits by staff from our ofiBce. During these visits, the wetland was observed to consist of an open-water pond which had very little emergent vegetation around the edges, and the uplands were mowed to the water’s edge. Water depths in the pond were assumed to be 1 to 2 feet. As shown on the attached grading plan (Figure 3), the ^plicant proposes to construct a small berm in the wetland along the western property line in order to provide substrate for the establishment of emergent herbaceous and woody wetland vegetation. A break in the berm will maintain the existing drainage of the wetland toward the southwest in order to prevent changes to the pond ’s water level The berm was determined to be necessary because the water depths along the western property line weie too deep to allow woody vegetation to become established. The proposed project would reestablish vegetation around portions of the wetland, and partially restore vegetation to the inner portions of the basin. The top elevation of the berm will be no more than l.O feet above the normal water level of the wetland; therefore, the project will result in no loss of wetland area. Although the project will partially restore the excavated wetland, the placement of 2,135 square feet (sf) of ^ material for the construction of the berm will be mitigated through the creation of 2,135 sf of new wetland adjacent to the existing wetland, and the estabUshment of 11,787 sf of native, non-inyanve vegetation in permanent upland buffin surrounding the new and existing wetland. ' 26105 Wild Rose Lane, Shorewood, Minnesota 55331 • Phone: 952-401-8757 • Fax: 952^1-8798