Definitions. Unless specifically defined below, words and phrases used in this article shall be interpreted so as to give them the same meanings as they have in common usage and so as to give this article its most reasonable application:
ACCESSORY USE OR STRUCTURE
A use or structure on the same lot with, and of a nature customarily incidental and subordinate to, the principal use or structure.
FLOODPLAIN
A relatively flat or low land area adjoining a river, stream or watercourse which is subject to partial or complete inundation or, any area subject to the unusual and rapid accumulation or runoff of surface waters from any source.
FLOODWATERS OF THE ONE-HUNDRED-YEAR FREQUENCY
The waters of a flood that, on the average, is likely to occur every 100 years (i.e., that has a 1% chance of occurring each year).
FLOODWAY
The designated area of a floodplain required to carry and discharge floodwaters of a given magnitude.
OBSTRUCTION
Any wall, dam, wharf, embankment, levee, dike, pile, abutment, projection, excavation, channel rectification, culvert, building, wire, fence, stockpile, refuse, fill, structure, or matter in, along, across, or projecting into any channel, watercourse, or regulatory flood hazard area which may impede, retard, or change the direction of the flow of water, or that is placed where the flow of water might carry the same downstream to the damage of life or property.
STRUCTURE
Anything constructed or erected on the ground or attached to the ground including, but not limited to, buildings, factories, sheds, cabins, mobile homes, and other similar items.
SUBSTANTIAL IMPROVEMENT
Any repair, reconstruction or improvement of a structure, the cost of which equals or exceeds 50% of the actual cash value of the structure either before the improvement is started or, if the structure has been damaged and is being restored, before the damage occurred.