Historic Structure means any structure that is:
Soil structure means the arrangement of primary soil particles into compound particles, peds, or clusters that are separated by natural planes of weakness from adjoining aggregates.
Accessory structure means a structure that is accessory and incidental to a dwelling located on the same lot.
Water control structure means a structure within, or adjacent to, a water, which intentionally or coincidentally alters the hydraulic capacity, the flood elevation resulting from the two-, 10-, or 100-year storm, flood hazard area limit, and/or floodway limit of the water. Examples of a water control structure may include a bridge, culvert, dam, embankment, ford (if above grade), retaining wall, and weir.
Sign structure means the assembled components that make up an outdoor advertising display, including, but not limited to, uprights, supports, facings, and trim. A sign structure may contain 1 or 2 signs per facing and may be double-faced, back to back, T-type, or V-type.