The Federal agencies, including the Department of Agiculture farming bureaus, the Department of the Interior wildlife conservation bureaus, and the Envirnmental Protection Agency, were unable to adopt one standard manual for mapping wetlands consistently. It is still a professional judgement call to determine the edge of a wetland, not a cookbook process that any real estate developer can eyeball from a car at 55 miles per hour. The Corps definition of wetlands recognizes that areas that are dry for much of the year can still be classified as wetlands. So cutting down the cattails to disguise the existence of a wetland won't work. Most wetlands lack both standing water and waterlogged soils during at least part of the growing season.
Area has soils that are called peats or mucks.
Area is periodically flooded by tides, even if only by strong, wind-driven, or spring tides.