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Westwood Professional Services,Inc. Exhibit B V • 14180 West Trunk Highway 5 Eden Prairie,Minnesota 55344 612/937-5150 MEMORANDUM April 29 , 1997 CPDC ELK RIVER WETLANDS WETLAND DELINEATION Wetlands were delineated and flagged in the field during September and October, 1996 by Westwood Professional Services, Inc.using the Corps of Engineers Wetlands Delineation Manual(Environmental Laboratory, 1987). This manual is used to delineate wetlands under both Section 404 of the Federal Clean Water Act and the Minnesota Wetland Conservation Act of 1991 (as amended). Delineated wetlands are shown on the attached Wetland Boundaries Map and summarized in the following table. Background data used to identify potential wetland areas before conducting the delineation in the field include National Wetlands Inventory(NWI) mapping; the Minnesota Department of Natural Resources' (DNR)Protected Waters and Wetlands Inventory; portions of the Soil Survey of Sherburne County; and annual color Food Security Act(FSA) slides from 1981 to 1995. Delineation Results • The site contains 39 wetlands that encompass a total of 83.97 acres. Six or more of these basins currently serve as receiving ponds for pig feedlot runoff. The nature of these wetland has changed significantly since the pig farm was constructed in the mid 1960s, and the manure carried by runoff has impacted the quality of waters in these basins. In order to determine whether any of the wetlands in the pig feedlots may have been unintentionally created and therefore subject to exemption, historical aerial photography taken for three years (1939, 1953, and 1969). All of the wetlands located in the pig feedlots appeared on aerial photography from these three years. Although swine farming has impacted these wetlands, it does not appear to have been responsible for wetland creation.