The Shoreland-Wetland Overlay District includes those areas designated as a wetland on the Wetland Inventory Map with a date of November 12, 1985, that 1) are five acres or more; 2) are located within 1,000 feet of the ordinary high-water mark of a navigable lake, pond, or flowage, or are located within 300 feet of the ordinary high-water mark of a navigable river or stream, or to the landward side of the 100-year floodplain, whichever distance is greater; 3) were not legally filled before November 12, 1985, and cannot be classified as a wetland; and 4) are not located between the original ordinary high-water mark and a bulkhead line established prior to May 7, 1982, under § 30.11, Wis. Stats.