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b. Have a low flood damage potential; c. Are to be constructed and placed on the building site so as to offer minimum ob- struction to the flow of flood waters. Whenever possible, structures will be con- structed with the longitudinal axis parallel to the direction of flow of flood waters, and will be placed with their longitudinal axis approximately on the same line as those of adjoining structures; d. Are firmly anchored to prevent them from floating away and restricting bridge open- ings or other restricted sections of the stream or river; and e. Have all service facilities, such as electrical and heating equipment at or above the flood protection elevation for the particular area. (3) Uses permitted by the Department of Natural Resources pursuant to Chapters 30 and 31, Wis. Stats. , provided that the necessary permits are obtained and amendments approved by the County to the official floodway lines, water surface profiles, flood plain zon- ing maps and flood plain zoning ordinance. (4) Public utilities, streets and bridges provided that: a. Adequate flood proofing measures are provided to the flood protection elevation; b. Construction shall not cause any increase of 0.1 foot or greater in the height of the regional flood, except that reasonal-le increases up to 1.0 foot may be approved if the amendment procedures and all conditions of Section 10.57 (b) are met; and c. The county amends its water surface profiles, flood plain zoning maps and flood plain zoning ordinances to reflect any changes resulting from such construction. (5) Fills or deposition of materials may be permitted provided that: a. The provisions of Section 10.51 (1) (1) are met; b. Fill or deposition of materials does not encroach on the channel area between the ordinary high water mark on each bank of the stream unless a permit has been granted by the Department of Natural Resources pursuant to Chapter 30, Wis. Stats. , and a permit pursuant to Section 404 of the Federal Water Pollution Control Act, Amendments I_ of 1972,33 U.S.C. 1334 has been issued, if applicable, and the other requirements of this Section are met; and c. The fill or other materials will be protected against erosion by rip-rap, vegetative cover, sheet piling and/or bulkheading sufficient to prevent erosion and leachate. SECTION 10.53 REGIONAL FLOOD FRINGE DISTRICT (FF) (a) APPLICABILITY: The provisions of this Section shall apply to all areas within the Re- gional Flood Fringe District, as shown on the official flood plain zoning maps, and to those portions of. the General Flood Plain District that are determined to be in the flood fringe area pursuant to Section 10.56 (d) of this Ordinance. (b) DESCRIPTION OF DISTRICT: The regional flood fringe district shall include the A Zones so designated on the official flood plain zoning map showing the regional flood limits, which are based on the Flood Hazard Boundary maps or Flood Insurance Study maps prepared by Department of Housing and Urban Development, and dated September 29, 1978 . All such maps shall be approved by the Depaftment of Natural Resources and the Federal Insurance Administration. (c) PERMITTED USES: The following uses shall be permitted uses within the Flood Fringe District and flood fringe portions of the General Flood Plain District. ' (1) Any structures, landuse, or development may be permitted to the extent that they are not prohibited by this or any other Ordinance or any other Federal, State or local regulations and provided that a zoning permit has been issued by the Zoning Administrator. (d) STANDARDS FOR DEVELOPMENT IN FLOOn FRINGE AREAS (1) All of the provisions of Section 10.51 (e) shall apply hereto. I (2) RESIDENTIAL: All residential structures shall meet the following standards: a. The first floor of a structure to be erected, constructed, reconstructed, or moved on the flood plain shall be constructed on fill at or above the flood protection ele- vation for the particular area. The fill shall be not less than one- foot below the flood protection elevation for the particular area and the fill shall extend at such elevation at least 15 feet beyond the limits of any structure or building erected thereon. • b. The basement floor shall be at or above the regional flood elevation, unless a community wide exemption allowing flood proofing of basements has been granted by the Federal Insurance Administration of the Department of Housing and Urban Development (HUD) . (3) COMMERCIAL: In commercial areas, any structure or building which is to be erected, constructed, reconstructed, added to or moved into the flood fringe area shall meet the requirements of Section 10.53 (d) (2) (a) and 10.53 (d) (2) (b) above. Certain yards, parking lots and other accessory land uses may be at lower elevations. How- ever, no such area in general use by the public shall be inundated to a depth greater than two feet or subjected to flood velocities greater than four feet per second upon - 4 - •