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<br /> (27) OFFICIAL FLOOD PLAIN ZONING MAP - that map, adopted and made part of this ordinance,
<br /> which has been approved by the Department of Natural Resources and the Federal Insu-
<br /> rance Administration of HUD, and which delineates those areas which would be inundated
<br /> by the base or regional flood, including but not limited to numbered and unnumbered
<br /> A ZONES, and where applicable, floodways. This map may be a Flood Hazard Boundary
<br /> Map (see 10.59 (a) (16) , Flood Insurance Study Map (see 10.59 (a) (17) , or othcr
<br /> approved community flood plain map.
<br /> (28) OFFICIAL LETTER OF MAP AMENDMENT - Official notification from the Federal Insurance
<br /> Administration of HUD that a Flood Hazard Boundary Map or Flood Insurance Study Map
<br /> has been amended.
<br /> (29) REACH, HYDRAULIC - A hydraulic reach along a river or stream is that portion of the
<br /> river or stream extending from one significant change in the hydraulic character of
<br /> the river or stream to the next significant change. These changes are usually asso-
<br /> ciated with breaks in the slope of the water surface profile, and may be caused by
<br /> . bridges, dams, expansion and contraction of the water flow, and changes in stream bed
<br /> slope or vegetation.
<br /> (30) REGIONAL FLOOD - The regional flood is a flood determined to be representative of
<br /> large floods known to have generally occurred in Wisconsin and which may be expected
<br /> to occur on a particular stream because of like physical characteristics. The flood
<br /> frequency of the regional flood is once in every 100 years; this means that in any
<br /> given year there is a 1% chance that the regional flood may occur or be exceeded.
<br /> During a typical 30-year mortgage period, the regional flood has a 26% chance of occur-
<br /> rence.
<br /> (31) STORAGE CAPACITY OF A FLOOD PLAIN - the volume of space above an area of flood plain
<br /> land that can be occupied by flood water of a given stage at a given time, regardless
<br /> of whether the water is moving.
<br /> (32) STRUCTURE - anything constructed or erected, the use of which requires a permanent
<br /> or temporary location on or in the ground, stream bed or lake bed, which includes, but
<br /> is not limited to, objects such as buildings, factories, sheds and cabins, mobile
<br /> homes, gas or liquid storage tanks, bridges or culverts.
<br /> (33) SUBSTANTIAL IMPROVEMENT - Any repair, reconstruction, or improvement of a structure, the
<br /> cost of which equals or exceed fifty percent (50%) of the present assessed
<br /> value of the structure either before the improvement or repair is started, or if the
<br /> structure has been damaged, and is being restored, before the damage occurred. The
<br /> term does not, however, include either: (I) any project for improvement of a struc-
<br /> ture to comply with existing state or local health, sanitary, or safety code specifi-
<br /> cations which are solely necessary to assure safe living conditions, or (II) any alter-
<br /> ation of a structure or site documented as deserving preservation by the Wisconsin
<br /> State Historial Society or listed on the National Register of Historic places. Ordi-
<br /> nary maintenance repairs are not considered structural repairs, modifications, or addi-
<br /> tions; such ordinary maintenance repairs include internal and external painting, de-
<br /> corating, paneling, and the replacement of doors, windows, and other nonstructural com-
<br /> ponents.
<br /> (34) UTILITIES - Any public or private water supply, or waste collection and/or disposal
<br /> system, including but not limited to; septic systems, private and public wells, and
<br /> their attendant facilities, public sewage collection systems and treatment facilities.
<br /> EFFECTIVE: September 27, 1978
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