A person proposing a structural shoreline stabilization measure that employs a jetty, groin, breakwater, or other offshore structure, shall design the project to: Allow natural littoral movement of sand along the shore; Minimize erosion and undesirable shoaling; Use materials that are: Of adequate size, weight, and strength to function as intended; Free of protruding objects, debris, and contaminants; and Selected to minimize impacts to water quality and plant, fish, and wildlife habitat; Use backfill material free of litter, refuse, junk, metal, tree stumps, logs, or other unsuitable materials; Prevent damage due to scour; and Minimize grading and other impacts on riparian habitat. The Department may not authorize encroachment into State or private tidal wetlands unless: The encroachment is limited to that which is structurally necessary and is verified by a design report or other documentation, as required by the Department; and For a bulkhead: The encroachment is three feet or less beyond the mean high water line; and Other nonstructural and structural shoreline stabilization measures are infeasible, as determined by the Department.