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I . <br /> 1 ' 11-28 <br /> provisions of the flood plain zoning representative of large floods known to <br /> j ordinance for the area of the flood plain have generally occurred in Wisconsin and <br /> which it occupies. which may be expected to occur on a <br /> particular stream because of like <br /> (aa) Official Flood Plain Zoning Map. physical characteristics. The flood <br /> That map, adopted and made part of this frequency of the regional flood is once in <br /> ordinance, which has been approved by every 100 years; this means that in any <br /> the Department of Natural Resources given year there is a 1% chance that the <br /> , and the Federal Insurance Administration regional flood may occur or be <br /> of FEMA and which delineates those exceeded. During a typical 30 year <br /> areas which would be inundated by the mortgage period, the regional flood has a <br /> I- base or regional flood, including but not 26% chance of occurrence. <br /> f ; limited to numbered and unnumbered A <br /> Zones, and where applicable, floodways. (dda) Special Exception means a use <br /> This map may be a Flood Hazard which is permitted by this ordinance <br /> _ Boundary Map (see 11.21(p), or other provided that certain conditions are met <br /> approved community flood plain map.) and that a permit is granted by the Board <br /> of Adjustment. <br /> (bb) Official Letter of Map <br /> Amendment. Official notification from (ee) Storage Capacity of a Flood Plain. <br /> the Federal Insurance Administration The volume of space above an area of <br /> Office of FEMA that a Flood Hazard flood plain land that can be occupied by <br /> -1 '. Boundary Map or Flood Insurance ;tudy flood water of a given stage at a given <br /> Map has been amended. time, regardless of whether the water is <br /> cnoving. <br /> r--, (bba) Ordinary high-water mark means <br /> the point on the bank or shore up to <br /> an Structure. Anything constructed or <br /> which the presence and action of surface ^•-cctcd, the use of which requires a <br /> water is so continuous as to leave a permanent or temporary location on or in <br /> ii distinctive mark such as by erosion, the ground, stream bed or lake bed, <br /> destruction or prevention of terrestrial which includes, but is not limited to, <br /> vegetation, predominance of aquatic objects such as buildings, factories, sheds <br /> vegetation, or other easily recoglized and cabins, mobile homes, gas or liquid <br /> characteristics. storage tanks, bridges or culverts. <br /> . (cc) Reach, Hydraulic. A hydraulic (gg) Substantial Improvements. Any <br /> reach along river or stream is that repair, re-construction, or improvement <br /> portion of the river or stream extending of a structure, the cost of which equals <br /> from one significant change in the or exceeds fifty percent (50%) of the <br /> - hydraulic character of the river or present assessed value of the structure <br /> stream to 'the next significant change. either before the improvement or repair <br /> These. changes are ususally associated is started, or if the structure has been <br /> ,_.• with breaks in the slope of the water damaged, and is being restored, before <br /> surface profile, and may be caused by the damage occurred. The term does <br /> bridges, dams, expansion and contraction not, however, include either: (I) any <br /> of the water flow, and changes in stream project for improvment of a structure to <br /> bed slope or vegetation. comply with existing .state or local <br /> health, sanitary, or safety code <br /> (dd) Regional Flood. The regional flood specifications which are solely necessary <br /> is a flood determined to be <br /> y i <br />