For the purposes of this chapter, the following definitions are adopted:

    "Base flood" means the flood having a one-percent probability of being equalled or exceeded in any given year. The base flood is also known as the one hundred (100) year flood. The base flood elevation at any location is as defined in Section 15.60.040.

    "Building" means a structure that is principally above ground and is enclosed by walls and a roof. The term includes a gas or liquid storage tank, a manufactured home or a prefabricated building. The term also includes recreational vehicles and travel trailers to be installed on a site for more than one hundred eighty (180) days.

    "Development" means any manmade change to real estate, including:

    1.    Construction, reconstruction or placement of a building or any addition to a building valued atmore than one thousand dollars ($1,000.00);

    2.    Installing a manufactured home on a site, preparing a site for a manufactured home or installing a travel-trailer on a site for more than one hundred eighty (180) days;

    3.    Installing utilities, construction of roads, orsimilar projects;

    4.    Construction or erection of levees, walls, fences, bridges or culverts;

    5.    Drilling, mining, filling, dredging, grading,excavating or other nonagricultural alterations of the ground surface;

    6.    Storage of materials; or

    7.    Any other activity that might change the direction, height or velocity of flood or surface waters.

Development does not include maintenance of existing buildings and facilities such as re-roofing; re-surfacing roads; or gardening, plowing and similar agricultural practices that do not involve filling, grading or construction of levees.

    "Flood" means a general and temporary condition of inundation of normally dry land areas from the overflow, the unusual and rapid accumulation, or the runoff of surface waters from any source.

    "Floodway" means that portion of the SFHA required to store and convey the base flood. The floodway for the SFHAs of the Mississippi River and Carr and Palmer Creeks shall be as delineated on the Flood Insurance Rate Map applicable to the city. The floodway for each of the remaining SFHAs of the city shall be according to the best data available to the Illinois State Water Survey Floodplain Information Repository.

    "FPE" or "flood protection elevation" means the elevation of the base flood plus one foot at any given location in the SFHA.

    "Riverine SFHA" means any SFHA subject to flooding from a river, creek, intermittent stream, ditch or any other identified channel. This term does not include areas subject to flooding from lakes (except public bodies of water), ponding areas, areas of sheet flow, or other areas not subject to overbank flooding.

    "SFHA" or "special flood hazard area" means the lands within the jurisdiction of the city that are subject to inundation by the base flood. The SFHAs of the city are generally identified as such on the Flood Insurance Rate Map of the city prepared by the Federal Emergency Management Agency and dated September 5, 1990. The SFHAs of those parts of unincorporated Monroe County that are within the extraterritorial jurisdiction of the city or that may be annexed into the city are generally identified as such on the Flood Insurance Rate Map prepared for Monroe County by the Federal Emergency Management Agency and dated April 5, 1988. (Ord. 819 § 2, 1990)