Where a subdivision or land development is traversed by or contains a pond, lake, watercourse, drainage way, channel, storm drainage system, or stream, a drainage easement shall be provided in accordance with §
138-7D of this chapter. The minimum easement width shall be 10 feet from each side of the watercourse, waterbody, stream, pond, lake or drainage facility, but the Township may require a greater easement when necessary. When required by the Township, bearings and distances shall be provided to define the boundaries of the easements.