Banks

That land area immediately adjacent to, and which slopes toward, the bed of a watercourse, and which is necessary to maintain the integrity of a watercourse. For purposes of this Part, a bank will not be considered to extend more than 50 feet horizontally from the mean highwater line; with the following exception: where a generally uniform slope of 45 degrees (100 percent) or greater adjoins the bed of the watercourse, the band is extended to the crest of the slope or the first definable break in slope, either a natural or constructed (i.e. road or railroad grade) feature, lying generally parallel to the watercourse. (Rules and Regulations of the State of New York, Title 6. Dept. of Environmental Conservation, Chapter 5. Subchapter E, Part 608. Use and Protection of Waters, Definitions)