The identified floodplain area shall consist of the following specific areas:
A. The floodway area shall be those areas identified in the FIS and the FIRM as floodway and which represent the channel of a watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without increasing the water surface elevation by more than one foot at any point. This term shall also include floodway areas which have been identified in other available studies or sources of information for those special flood hazard areas where no floodway has been identified in the FIS and FIRM.
(1) Within any floodway area, no encroachments, including fill, new construction, substantial improvements, or other development shall be permitted unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in flood levels within the Township during the occurrence of the base flood discharge.
(2) Within any floodway area, no new construction or development shall be allowed, unless the appropriate permit is obtained from the Department of Environmental Protection Regional Office.
B. The AE area/district shall be those areas identified as an AE zone on the FIRM included in the FIS prepared by FEMA for which base flood elevations have been provided.
(1) The AE area adjacent to the floodway shall be those areas identified as an AE Zone on the FIRM included in the FIS prepared by FEMA for which base flood elevations have been provided and a floodway has been delineated.
(2) AE area without floodway shall be those areas identified as an AE zone on the FIRM included in the FIS prepared by FEMA for which base flood elevations have been provided but no floodway has been determined.
(a) No floodplain development compliance certificate shall be granted for any construction, development, use, or activity within any AE area/district without floodway unless it is demonstrated that the cumulative effect of the proposed development would not, together with all other existing and anticipated development, increase the base flood elevation more than one foot at any point.
(b) No new construction or development shall be located within the area measured 50 feet landward from the top-of-bank of any watercourse, unless the appropriate permit is obtained from the Department of Environmental Protection Regional Office.
C. The A area/district shall be those areas identified as an A zone on the FIRM included in the FIS prepared by FEMA and for which no base flood elevations have been provided. For these areas, elevation and floodway information from other federal, state, or other acceptable sources shall be used when available. Where other acceptable information is not available, the following procedures shall be used To determine the base flood elevation:
(1) For all non-accessory structures (including residential, commercial, industrial, and institutional structures), the applicant shall be required to submit a letter of map amendment (LOMA) to FEMA to either remove the non-accessory structure from the A zone, or obtain a base flood elevation for a non-accessory structure that cannot be removed from the A zone.
(2) For all accessory structures:
(a) The base flood elevation may be determined by using the elevation of a point on the boundary of the identified floodplain area which is nearest the construction site; or
(b) The Township may require the applicant to determine the elevation using 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 standards. Studies, analyses, computations, etc., shall be submitted in sufficient detail to allow for a thorough technical review by the Township.
For all accessory structures and all non-accessory structures, no new construction or development shall be located within the area measured 50 feet landward from the top-of-bank of any watercourse, unless the appropriate permit is obtained from the Department of Environmental Protection Regional Office.
D. The AO and AH area/district shall be those areas identified as zones AO and AH on the FIRM and in the FIS. These areas are subject to inundation by 1%-annual-chance shallow flooding where average depths are between one and 3 feet. In zones AO and AH, drainage paths shall be established to guide flood waters around and away from structures on slopes.
(Ord. 6-6-2016, 6/6/2016, § 8-402)