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the other side of a river or stream for a significant hydraulic reach. This campu- s' tation assures that property owners up, down or across the river or stream will have the same rights of hydraulic encroachment. Encroachments are analyzed on the basis of the effect upon hydraulic conveyance, not upon the distance the encroachment ex- tends into the floodway. (13) "EXISTING MOBILE HOME PARK OR MOBILE HOME SUBDIVISION" - means a parcel (or contiguous parcels) of land divided into two or more mobile home lots for rent or sale for which the construction of facilities for servicing the lot on which the mobile home is to be affixed (including, at a minimum, the installation of utilities, either final site grading or the pouring of concrete pads, and the construction of streets) is completed before the effective date of flood plain management regulations adopted by a community. (14) "FLOOD OR FLOODING" - A general and temporary condition of partial or complete inunda- tion of normally dry land areas from the overflow of inland waters, or the unusual and rapid accumulation or runoff of surface waters from any source. (15) FLOOD FRINGE - The flood fringe is that portion of the flood plain outside of the flood way, which is covered by flood waters during the regional flood; it is generally asso- ciated with standing water rather than rapidly flowing water. (16) FLOOD HAZARD BOUNDARY MAP - A map prepared by the U.S. Department of Housing and Urban Development, designating areas of special flood hazard within a given community. Flood hazard areas are designated as A ZONES. Said map forms the basis for both the regula- tory and insurance aspects of the National Flood Insurance Programs. (17) FLOOD INSURANCE STUDY MAP - A map prepared by the U.S. Department of Housing and Urban Development, designating areas of special flood hazard and flood insurance rate zones for a given community. Flood hazard and insurance rate zones are designated as A ZONES. Said maps form the basis for the regulatory and/or the insurance aspects of the National Flood Insurance Program. (10) FLOOD PLAIN - The flood plain is the land which has been or may be hereafter covered by flood water during the regional flood. The flood plain includes the floodway and the flood fringe. (19) FLOOD PROFILE - A graph or a longitudinal profile showing the relationship of the water surface elevation of a flood event to locations along a stream or river. (20) FLOOD PROOFING -"Flood proofing involves any combination of structural provisions, changes, or adjustment to properties and structures subject to flooding, primarily for the purpose of reducing or eliminating flood damage to properties, water and sanitary facilities, structures and contents of buildings in flood hazard areas. (21) FLOOD PROTECTION ELEVATION - The flood protection elevation shall correspond to a point two feet of freeboard above the water surface profile associated with the re- gional flood and the official floodway lines. Also see: FREEBOARD (22) FLOODWAY - The .,floodway is the channel of a river or stream and those portions of the flood plain adjoining the channel required to carry and discharge the flood water or flood ;Elows associated with the regional flood. (23) FREEBOARD - "Freeboard" is a factor of safety usually expressed in terms of a certain amount of feet above a calculated flood level. Freeboard compensates for the many unknown factors that contribute to flood heights greater than the height calculated. These unknown factors include, but are not limited to, ice jams, debris accumulation, wave action, obstruction of bridge openings and floodways, the effects or urbanization on the hydrology of the watershed, loss of flood storage areas due to development and aggradation of the river or stream bed. (24) "LAND USE" - Any "development" as defined in 10.59 (a) (9) . (25) MOBILE HOME - A structure transportable in one or more sections, which is built on a permanent chasis and designed to be used with or without a permanent foundation when connected to the required utilities. For the purpose of this Ordinance it does not in- clude recreational vehicles or travel trailers. I (26) NON-CONFORMING STRUCTURE: An existing lawful structure or building which is not in conformity with the provisions of the Zoning Ordinance for the area of the flood plain which it occupies. e.g. , an existing residential structure in the flood fringe district is a conforming use, however, if the first floor is lower than the flood protection elevation the structure is non-conforming. (27) NONCONFORMING USE - A nonconforming use is an existing lawful use of a structure, building or accessory use which is not in conformity with the provisions of the flood plain zoning ordinance for the area of the flood plain which it occupies. - 61 -