(A) For purposes of this chapter, the areas considered to be floodplain within the township shall be those areas identified as being subject to the 100-year flood in the Flood Insurance Study prepared for the township by the Federal Insurance Administration dated November, 1999, and the accompanying maps prepared for the township by FEMA, or the most recent revision thereof.
(B) The identified floodplain area shall consist of the following specific areas:
(1) FW (Floodway Area). The areas identified as “Floodway” in the AE Zone in the Flood Insurance Study prepared by FEMA. The term shall also include floodway areas which have been identified in other available studies or sources of information for those floodplain areas where no floodway has been identified in the Flood Insurance Study;
(2) FF (Flood-Fringe Area). The remaining portions of the 100-year floodplain in those areas identified as an AE Zone in the Flood Insurance Study, where a floodway has been delineated. The basis for the outermost boundary of this area shall be the 100-year flood elevations as shown in the flood profiles contained in the Flood Insurance Study; and
(3) FA (General Floodplain Area). The areas identified as Zone A in the FIS for which no 100- year flood elevations have been provided. When available, information from other federal, state and other acceptable sources shall be used to determine the 100-year elevation, as well as a floodway area if possible. When, no other information is available, the 100-year elevation shall be determined by using a point on the boundary of the identified floodplain area which is nearest the construction site in question.
(C) In lieu of the above, the township may require the applicant to determine the elevation with hydrologic and hydraulic engineering techniques. Hydrologic and hydraulic analyses shall be undertaken only by professional engineers or others of demonstrated qualifications, who shall certify that the technical methods used correctly reflect currently accepted technical concepts. Studies, analyses, computations and the like shall be submitted in sufficient detail to allow a thorough technical review by the township.
(Ord. 43C, passed 11-1-2001)