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Chapter 17 (a) Listed individually in the National floodplain which it occupies. (For example, an Register of Historic Places or preliminarily existing residential structure in the floodfringe determined by the Secretary of the Interior as district is a conforming use. However, if the first meeting the requirements for individual listing on floor is lower than the flood protection elevation, the the National Register; structure is nonconforming.) (b) Certified or preliminarily determined by (40) NONCONFORMING USE: An existing the Secretary of the Interior as contributing to the lawful use or accessory use of a structure or building historical significance of a registered historic district which is not in conformity with the provisions of this or a district preliminarily determined by the ordinance for the area of the floodplain which it Secretary to qualify as a registered historic district; occupies. (Such as a residence in the floodway.) (c) Individually listed on a state inventory of (41) OBSTRUCTION TO FLOW: Any develop- historic places in states with historic preservation ment which physically blocks the conveyance of programs which have been approved by the Secretary floodwaters such that this development by itself or in of the Interior, or conjunction with any future similar development will (d) Individually listed on a local inventory cause an increase in regional flood height. of historic places in communities with historic (42) OFFICIAL FLOODPLAIN ZONING MAP: preservation programs that have been certified either That map, adopted and made part of this ordinance, by an approved state program, as determined by the as described in s. 17.11, which has been approved by Secretary of the Interior; or directly by the Secretary the Department of Natural Resources and FEMA. of the Interior in states without approved programs. (43) OPEN SPACE USE: Those uses having a . (34) INCREASE IN REGIONAL FLOOD relatively low flood damage potential and not HEIGHT: A calculated upward rise in the regional involving structures. flood elevation, equal to or greater than 0.01 foot, (44) ORDINARY HIGHWATER MARK: The point resulting by a comparison of existing conditions and on the bank or shore up to which the presence and proposed conditions which is directly attributable to action of surface water is so continuous as to leave a development in the floodplain but not attributable to distinctive mark such as by erosion, destruction or manipulation of mathematical variables such as prevention of terrestrial vegetation, predominance of roughness factors, expansion and contraction aquatic vegetation, or other easily recognized coefficients and discharge. characteristic. (35) LAND USE: Any nonstructural use made of (45) PERSON: An individual, or group of unimproved or improved real estate. (Also see individuals, corporation, partnership, association, DEVELOPMENT.) municipality or state agency. (36) MOBILE HOME: A structure transportable in (46) PRIVATE SEWAGE SYSTEM: A sewage one or more sections, which is built on a permanent treatment and disposal system serving a single chassis and is designed to be used with or without a structure with a septic tank and soil absorption field 1 permanent foundation when connected to required located on the same parcel as the structure. This utilities. For the purpose of this ordinance, it does term also means an alternative sewage system not include recreational vehicles or travel trailers approved by the department of industry, labor and which remain licensed and ready for highway use human relations including a substitute for the septic and remain on-site less than 180 days. As used in tank or soil absorption field,a holding tank,a system this ordinance, mobile home includes manufactured serving more than one structure or a system located homes.6 on a different parcel than the structure. (37) MUNICIPALITY or MUNICIPAL: A city, (47) PUBLIC UTILITIES: Those utilities using village or town located wholly or partly within the underground or overhead transmission lines such as boundaries of the County of Dane. electric, telephone and telegraph, and distribution (38) NGVD or the National Geodetic Vertical and collection systems such as water, sanitary sewer Datum refers to elevations referenced to mean sea and storm sewer. level datum, 1929 adjustment. (48) REGIONAL FLOOD: A flood determined to (39) NONCONFORMING STRUCTURE: An be representative of large floods known to have existing lawful structure or building which is not in occurred in Wisconsin or which may be expected to conformity with the dimensional or structural occur on a particular lake, river or stream once in requirements of this ordinance for the area of the every 100 years. (49) STRUCTURE: Any manmade object with form, shape and utility, either permanently or 6Annotation:As set forth federal rule,Oct.logo temporarily attached to, placed upon or set into the Page 76